valmet cooking liquor measurement series 3400 · 1.2. sensors. sensors are based on the 4-electrode...

Valmet Cooking Liquor Measurement

Series 3400

Installation &operating manual

K14927 V1.1 EN

Table of contents

Warnings & safety information

About the device 61.

Description.......................................................61.1.Sensors............................................................61.2.Temperature compensation.............................61.3.Applications......................................................61.4.Warranty...........................................................61.5.

Installation 72.

Installation notes..............................................72.1.Dimensions......................................................72.2.Mounting the TCU............................................82.3.Electric connections.........................................92.4.Connecting the sensor...................................102.5.Mounting the sensor.......................................112.6.Sluice sensor..................................................132.7.

Operating 143.

Keypad...........................................................143.1.Measurement display.....................................143.2.Service display...............................................143.3.Menu display..................................................143.4.System menu.................................................163.5.Adjustment menu...........................................173.6.Application menu............................................173.7.mA output menu.............................................173.8.Alarms menu..................................................173.9.Autoclean menu.............................................173.10.

System testing & adjustment 184.

Verifying system operation.............................184.1.Titration of black liquor...................................194.2.Adjusting for concentration............................204.3.Changing the chemical value unit..................204.4.

Maintenance & troubleshooting 215.

Cleaning the sensor.......................................215.1.Troubleshooting.............................................225.2.Plug-up of measuring chamber......................225.3.Checking flow rate in measuring chamber.....225.4.Removing & mounting sluice sensor..............235.5.Spare parts.....................................................245.6.Test equipment...............................................245.7.

Technical specification

Data sheets

HART® specification

Declaration of conformity

Installation & operating manual K14927 V1.1 EN3Conductivity TCU series 3400

Recycling and disposal

When sorted by material, nearly all parts of the device can be recycled.A materials list is delivered with the device. Upon request, the manufac-turer will provide more detailed instructions for recycling and disposal.

Used devices may also be returned to the manufacturer for recycling anddisposal against a separate fee.

The equipment contains no batteries.

4

Warnings & safety information

Various commercially available chemicals are used when cleaning thedevice. The chemicals supplier must provide complete safety data sheetsfor all chemicals they supply, stating the safety precautions and protectiveequipment required when handling or storing the chemical.

Do NOT use Hydrochloric acid (HCl) or Hydrofluoric acid (HF) for cleaning!


1. About the device1.1. DescriptionThe series 3400 Cooking TCU is designed for alkaliconcentration measurement in pulp mills, based onelectrical conductivity and temperature using Valmet4-electrode conductivity sensors series 4300. lt is de-signed for wall mounting or panel mounting in industrialplant environments.

The TCU has four set-up modes. Each of the fourset-up modes has access to individual settings of tem-perature compensation, output range, alarm, and calib-ration. The set-up modes are selectable remotely orfrom the keypad.

The TCU has two 4–20 mA current outputs, a dis-play, and a keypad. The line-powered version has tworelays for alarms. HART® protocol for field devicetransmitters is included as standard feature.

TCU versions, type no.

Line poweredLooppowered

3417H3407HWall mounted

3418H3408HPanel mounted

1.2. SensorsSensors are based on the 4-electrode principle accord-ing to which the current and the voltage are measuredacross separate electrodes. That eliminates the errorsfrom the polarization effect that is generally a problemat high conductivities.

The value of the cell constant is stored in the sensor.This makes all sensors interchangeable without sacrifi-cing accuracy and without the need for recalibration orre-entering the cell-constant when exchanging thesensor. A large selection of sensor types is availablemeeting the needs for almost any application.

1.3. Temperature compensationln an electrolyte, all ions present will contribute to theconductivity. Different ions will contribute with differentamounts and the amounts will vary with temperature.When the conductivity is used for the calculation of achemical concentration, it is necessary to calculatewhat the conductivity would be at a fixed temperature(the conductivity is temperature compensated). Thisconductivity is calculated from measured conductivityand temperature. As different ions have different tem-perature dependences, the temperature compensationis to be selected to fit the actual application. The tem-perature is measured with a Pt-1000 resistor in thesensor.

1.4. ApplicationsThe type 3400 Cooking TCU is designed for applica-tions in the pulp industry.

The values to do the signal conditioning for eachapplication are stored under a recipe No. The valuescontrol the measuring range, the temperature compens-ation, the linearization, the expansion, and the conver-sion to engineering units. See Technical specificationfor the recipes.


2. Installation2.1. Installation notesImportant issues when planning TCU installation:• Whether mounted on a wall, in a panel or onto a

piping or cable tray, the place should be free of vi-brations and mechanically shocks should not occur.

• Protect the instrument from process electrolyte, andfrom downpour. lf necessary use a Protection Shield.

• Protect the instrument from excessively high or lowtemperatures and from direct sunlight.

• Be aware of the sensors requirements for liquorvolume around the sensor tip.

• Minimize the length of sensor cable as much aspossible.

• Mount the sensor at a place where it is protectedfrom mechanical impact, where it can be accessedand extracted from the process liquor for servicejobs, and where the process liquor is properlygrounded via the process piping.

• Look out for ground loop currents, which can causea fluctuating or faulty reading. There should be nopotential between the mounting place of the TCUcase and the sensor. lf mounting the TCU on a cabletray, the cable tree should be electrically connectedto the process piping. Also, look up for a potentialdifference between the protective ground and theprocess piping and/or the mounting place of theTCU.

• A special situation arises where the process pipingis made by isolating material e.g. PTFE lined steelpiping, PVC or PP piping, giving no ground connec-tion of the process electrolyte. lf the sensor is of thetype where no metal structure is in electrical contactwith the process electrolyte giving a grounding ofthe process electrolyte that way, it is necessary toestablish a grounding electrode in the processelectrolyte, which must be connected to the metalstructure of the sensor or to the housing of the TCU.

2.2. Dimensions

OKesc

144Ø5.2

11614

4

153

107

26.55

Fig. 1. Installation dimensions, in millimeters.


2.3. Mounting the TCU• Wall mounting: to access the sensor connectors,

open the lid and dismount the corner screws (4 pcs);see Fig. 2.

• Panel mounting: make a cut-out to the panel, size138×138 mm (5.34" × 5.34"); Fig. 3.

• Pipe mounting: the bottom part of the TCU can beturned 90° for mounting on a horizontal tube. SeeFig. 4.

Pipe mounting kits:4902a: for 25–38 mm pipes4902b: for 35–52 mm pipes4902c: for 50–73 mm pipes4902d: for 72–94 mm pipes4902e: for 82–114 mm pipes

Fig. 2. Wall mounting.

107

26.55

Fig. 3. Panel mounting.

Fig. 4. Pipe mounting.


2.4. Electric connections

mA1 mA2

+ - + + - +-A Com B

+-

Power supplyNo. 1

16 - 30 V DC

+-

Power supplyNo. 3

12 - 30 V DC

+-

Power supplyNo. 2

6 - 30 V DCOptional

Optional

SASB

Input load 4.4KSAOffOnOffOn

SBOffOffOnOn

Set-up 1Set-up 2Set-up 3Set-up 4

Switches S and Scontrol set-up selection

A B

J3

J2

1 2 3 4 5 6 7

Outputs ControlmA1 mA2+ - +

+A 0 +B-

J1

1110

98

76

54

3S

enso

r2

1

Fig. 5. Loop powered version.

L N

J2

J3

U7

J4

J1J5

1 2 3 4 5+ +- -

6 7 8 9 10 11

Alarms230V

Outputs Control1 2 mA1 mA2 +A +B0

1110

98

76

54

3S

enso

r2

1

Supply voltage input 85-265 V ACL = LiveN = Neutral

= Ground (housing)Equipment is constructed for permanentinstallation and must be grounded forsafety reasons. A power switch must beavailable close to the equipment.

Fuse, RM51A slow blow

J2

mA

2+C

omm

Com

mm

A1+

1 2 +A 0 +B

Alarm contactsshown in

modeunpowered

+ ++ - - -+

mA1 & mA2: active outputs.Max. output voltage: 16V@20mA

AlarmsOutput

Control

SAOffOnOffOn

SBOffOffOnOn

Set-up 1Set-up 2Set-up 3Set-up 4

Switches S and Scontrol set-up selection

A B

+-

Power supply

12 - 30 V DC

Optional

SASB

Input load 4.4K

Fig. 6. Line powered version.


2.5. Connecting the sensor1. Unscrew the union nut (Fig. 7 A) and separate the

cable union parts (B).2. Screw in the cable joint (C) to the TCU case.3. Reassemble the cable union and tighten until the

packing is tight.4. To disconnect the sensor, unscrew the union nut

(A) and separate the parts (B) before unscrewingthe cable screw joint (C).

NOTE: Tighten the cable gland to fulfil EMC requirements!

L N

J2

J3

U7

J4

J1J5

1 2 3 4 5+ +- -

6 7 8 9 10 11

Alarms230V

Outputs Control1 2 mA1 mA2 +A +B0

1110

98

76

54

3S

enso

r21

A

B

C

Fig. 7. Connecting the sensor.


2.6. Mounting the sensorThe sensor should be mounted at a place where therewill be no occurrence of air pockets or bubbles. Thebest installation is obtained across a pump or in anupstream pipe. lf the installation is made in a down-stream pipe, it may be necessary to insert a flowdamper just after the measuring place.

Recommendation: Install stop valves so that thesensor can be removed for service.

If stop valves are used for regulation of the flow, theoutflow valve shall be the most closed of the valves inorder to create an excess pressure in the measuringchamber.

When measuring on lye containing chips, which mayaccumulate in the measuring chamber, the inlet has tobe done through a filter. A choked measuring chamberwill cause a scaling alarm, even if the scaling on thesensors is very little. When white liquor is added to thecooking liquor, it should preferably be done before apump or a mixer. The pump will mix the liquors, thusmeasurements done at the pressure side of the pumpwill include the added white liquor.

Stopvalve

Blowvalve

Sensor

Up

Stopvalve

Samlevalve

Fig. 8. Typical upstream mounting across a damper.

Sensor

Pump

High pressure cleaningsteam or water

1.9"

(Ø48

)

2.9"

(Ø73

)

Filter2.9"

(Ø73)

46 x 0.2" (Ø5) holes

Dimensions in inches (mm)

Steam

Normally open

Sample flowadjustment

Fig. 9. Installing sensor.


T

Cooking liquor

Stopvalve

Blowvalve

Whiteliquor

Samplevalve

Onewayvalve

Rinsevalve

Cooling water

Sample

Coolingwatervalve


Mea-suringpipe

Sensor

Packingkit

Cooling panel

UP

Fig. 10. Recommended mounting across a pump.


Measuringpump

Stop valve

White liquor

Intermittedpump

Sample

Fig. 11. Recommended mounting across a pump with intermittent operation.


2.7. Sluice sensor

170.42

158.55

158.53158.52

158.54 3 pcs.O-rings 513.9326.7 x 1.78

513.41170.41

170.20

504.25

170.44513.11

170.43

158.55

170.45

156.16

502.41

Fig. 12. Sluice sensor construction.

90(3.54“)

77(3

.03“

)

110(4.33“)

50(1.97“)

M6 x 25

Ø33.7 x 2.7(1.33 x 0.11“)

Ø88.9 x 2(3.5 x 0.08“)

Fig. 13. Safety lock for type 570 sensor sluice.

Safety lock prevents the operator from unscrewing thesensor when the ball valve is open (Fig. 14 A). Whenthe ball valve is closed (B) the operator is able to dis-mount the sensor.

A

B

Fig. 14. Operation of safety lock.


3. Operating3.1. KeypadWhen navigating in a menu, the cursor appears as anarrow on the left side of the menu texts. In some menusthe currently selected value or alternative is indicatedby an asterisk (*). Menu buttons:• OK: Switching from measurement display to menu

display; accepting a menu selection or value.• Esc: Returning from menu or submenu.• Up / down arrows: Navigating up and down in the

menu. Changing value when entering text or numer-ical values.

• Left / right arrows: Navigating in a menu line to aposition for modification.

• Valmet: Selects the measurement display or servicedisplay.The software structure is shown in Fig. 5.

3.2. Measurement display• Line 1: Active set-up and set-up type.• Line 2: Recipe text.• Line 3: Alarm status.• Line 4: Process value.• Line 5: blank.• Line 6: Measured liquor temperature.

3.3. Service displayTo access the service display and to exit from it, pressthe Valmet logo above the keypad. The service displayshows the following information:• Line 1: TCU serial number and active set-up• Line 2: Software version• Line 3: Process value.• Line 4: Measured conductivity, uncompensated• Line 5: Pt1000 value and liquor temperature.• Line 6: Cell constant & cell constant mode.• Line 7: Current channel value and range.• Line 8: Voltage channel value and range.

3.4. Menu displayTo access the menu press OK in the measurementdisplay, and the menu (Fig. 4) will appear. Select afunction with the up/down keys and press OK to accessit. See the following sections for more information onthe various settings.

The menu structure is shown in Fig. 5.

Fig. 1. Keypad.

4 Alkali19606 0-70 g/l NaOHStatus OK

g/lNaOH

45.71°C

27.55

Fig. 2. Measurement display.

SN:44403 Set-up:4SW:120905-1142PV:27.54g/l NaOHCo:182.1 mS/cmRt:1177.47 45.71°CCC:0.19981 AutomaticI :0.7419 R:3U :0.1227 R:3-2

Fig. 3. Service display.

1 AlkaliSystemAdjustmentApplicationmA outputAlarmsAutoclean

12.12g/l EA 45.71°C

Fig. 4. Menu display.


4 Alkali19606 0-70 g/l NaOHStatus OK

g/lNaOH

45.71°C

27.55

1 AlkaliSystemAdjustmentApplicationmA outputAlarmsAutoclean

12.12g/l EA 45.71°C

1. SystemSet-up SelectTemp. AdjustContrast AdjustBacklightRunmodeLanguageConductivity unitTemperature unitHART modeHART versionPoll addressPasswords set

1. AdjustmentAdjust lowAdjust highCausticizing %Sulfidity %Cell constant modeCell constant value

1. mA outputOutput1 selectLow limit 1High limit 1Output2 selectLow limit 2High limit 2

1. AutocleanMode SelectFlushing timeHolding timeMeasuring time

2. Set-up Select* Set-up 1

Set-up 2Set-up 3Set-up 4External

SN:44403 Set-up:4SW:120905-1142PV:27.54g/l NaOHCo:182.1 mS/cmRt:1177.47 45.71°CCC:0.19981 AutomaticI :0.7419 R:3U :0.1227 R:3-2

2. Temp. Adjust ^v1

2. Contrast Adjust ^v

2. BacklightOnOff

2. Passwords setPassword menuPassword systemPassword adjustmentPassword applicationPassword outputPassword alarmPassword autoclean

2. Adjust low

0.000 Units^ CL b

2.* Off

Process ValuePV without TCTemperatureScaling

Output1/2 select

2. Low limit 1 / 2

0.00000 %^

2. Mode Select* Off

On

2. Flushing time

2 minutes^

Measurement display Menu displayService display

OK

Esc

OK

Esc

2. Runmode1 sec updateFast update

2. Language* English

SwedishFinnishSpanishPortuguese

2. Conductivity unitS/cmS/m

2. Temperature unit°C°F

2. HART modeRead/writeRead onlyOff

2. HART versionHART version 5HART version 6

2. Poll address0^

2. Adjust high

100.000 Units^ CL b

2. Causticizing %

80^

2. Sulfidity %

32^

2. Cell constant modeAutomaticManual

2. Cell constant value

1.00000^

2. High limit 1 / 2

100.000 %^

1. ApplicationRecipeUnit1Unit2Recipe textRestore setup

2. Recipe* 19615c 0-155 g/l AA

19615d 1-120 g/l AA..19677 Beloit ROH

2. Unit1

Units^

2.Recipe text

19675 Contin.Cook^

2. Unit2

CL b^

1. AlarmsAlarm1 selectAlarm1 typeAlarm1 limitAlarm2 selectAlarm2 typeAlarm2 limitAlarm:Display flash

2. Holding time

10 minutes^

2. Measuring time

120 minutes^

2.* Off

Process ValuePV without TCTemperatureScaling

Alarm1/2 select

2. Alarm1/2 limit

100.000 %^

2.* Off

On

Alarm:Display flash

2.* Maximum NO

Maximum NCMinimum NOMinimum NC

Alarm1/2 type

2. Damping settingsDamping disabledDamping value

Fig. 5. Software diagram.


3.5. System menuSettings in System menu are valid for all set-ups

Set-up select: Set-up 1…4. Each set-up contains anindividual set of values and selections. Set-up 1…3 areassigned to Concentration, Set-up 4 to standard con-ductivity.

External set-up selection is controlled from the digitalinputs. Set-up selection can also be controlled fromHART.

Temperature adjust: Edit the value with up/down arrowkeys, adjustment range ±1°C.

Contrast adjust: Change display contrast with up/downarrow keys.

Backlight: Selects between Off and On. Off = backlightis on for 20 seconds after a key is pressed and for 30seconds after power-on. A loop-powered TCU has nobacklight.

Run mode: Selects between 1 second update or Fastupdate. Controls how often a measurement is made.ln Fast update the TCU samples the sensor as fast aspossible. The sampling rate will be increased from 3to 4 samples per second when "Manual cell constant"is used.

Language: Select TCU language: English, Swedish,Finnish, Portuguese, or Spanish.

Conductivity unit: Select between S/cm and S/m.

Temperature unit: Select between °C and °F.

HART mode: Selects between Read/write, Read only,and Off.

HART version: Also selects between HART version 6and HART version 5. This affects the response fromcommand 0 and 15.

Poll address: Used from HART. lnitial set to 0.

Passwords set: Sets the passwords for each submenuin the main menu: System, Adjustments, TemperatureComp., mA Output and Alarm. Each password is a 4digit number.

A password of 0000 give free access. This is factorydefault. lf the password is forgotten press <LEFT> and<UP> at the same time. This will clear the password.lf password is used on one or more menu points theSystem menu shall also be protected to protect thepassword.

Damping settings: Allows the user to filter the incom-ing measurement signal. The damping value (seconds)sets the filtering period; if damping value is set to zero,"Damping disabled" is active.


3.6. Adjustment menuSettings in Adjustment menu are valid only for actualset-up.

Adjust low Adjust high: See section "Adjusting TCU"for the procedure.

Causticizing %: Used in PV calculations for recipe19615x.

Cell constant mode: Selects between Automatic andManual mode.

ln Automatic mode the cell constant is read from thesensor whereas in Manual mode a fixed value is used.When the mode is changed from Automatic to Manualthe automatic value is transferred to the Manual value.

Manual cell constant can be used to reduce thesampling period in Fast mode or to make an individualadjustment. However, the automatic setting of cellconstant is lost when the sensor is exchanged.

Cell constant value: Here a manual cell constant valuecan be entered. Most sensors have a value between0.17 and 0.24. The conductivity reading is proportionalwith the cell constant value.

3.7. Application menuSettings in Application menu are valid only for actualset-up.Recipe: Select here between available recipes.

Unit 1/2: The text for the two text strings following thebig PV value can be changed.

Recipe text: The text in line 2 can be edited. Use thearrow keys to select characters on the display.

Restore setup: The actual setup is restored to factorydefaults.

3.8. mA output menuSettings made in mA output menu are valid only foractual set-up.

Output select, alternatives:• Off• Process Value (conductivity without temperature

compensation)• Temperature• Scaling

Low/high limit: Set the values for the selected variablefor 4 mA and 20 mA output. For selection Off the highlimit sets a fixed output current with 0 as 4 mA and 100as 20 mA. Low limit is not used.

3.9. Alarms menuNot implemented in loop-powered version. Settingsmade in Alarms menu are valid only for actual set-up.

Alarm select, alternatives for alarm triggering:• Off• Process Value• Conductivity with no temperature compensation• Temperature• Scaling

Alarm type: Hysteresis 1% of value, 0.5°C for temper-ature.• Maximum / Minimum NO; NO = Normally Open, relay

contact is open during non-alarm and closed duringalarm.

• Maximum / Minimum NC; NC = Normally Closed,relay contact is closed during non-alarm and openduring alarm.

Alarm limit: Set the alarm limit in the selected unit.

Alarm display flash: Valid for all set-up modes withline-powered TCU. Selects between Off and On. lf setto On an alarm condition will make the backlight flash.

3.10. Autoclean menuNot implemented in loop-powered versions. Settingsin Autoclean menu are valid for all set-up modes.

The Autoclean function controls the wash sequenceof Autoclean Sensor type 4397. Alarm relay is used toactivate flushing. The normal setting of Alarm 1 is ig-nored. mA output 1 is frozen during the flush and holdtime.


4. System testing & adjustment4.1. Verifying system operationAfter installation it is recommended to verify the TCUoperation.

lf the TCU is mounted in a by-pass line it shall beverified that the liquor in the by-pass line is the sameas the liquor in the main line.

Black liquor, white liquor, and green liquor normallyhave a temperature close to or above 100oC. lf the flowin the sample line is too small, the temperature will bebelow normal process temperature. One of the alarmscan be programmed to warn for this situation.

From factory the Valmet TCU system has been setupaccording to the specifications of the purchase orderand the sensor is adjusted in the relevant liquid. Nocalibration is needed before installation, since the de-fault calibration line is already present in the TCU.

The TCU determines the concentration based onconductivity and temperature. Deviations from milllaboratory analyses of the liquor may occur for variousreasons.

After installation it is recommended to verify the TCUoperation by comparing TCU readings with laboratoryresults. We recommend using at least 10 readingstaken over several days (it is recommended that youuse the "Application Evaluation form" to keep track ofthese readings). These readings must cover the con-centration range of the TCU as far as possible.

Fig. 1. TCU vs. Laboratory.

Example:Application 196.75 Continuous cooking process (Trim).

Lab. values, as EATCU reading

8.5 g NaOH/l5 units

17.3 g NaOH/l13 units

19.8 g NaOH/l15.3 units

12 g NaOH/l, disregarded15.8 units



13 g NaOH/l10 units



35 g NaOH/l29.8 units

The readings shall be plotted in a X-Y diagram toshow how well they correlate, whether the sensitivityis correct, and whether there is an offset. When evalu-ating the results the accuracy of the laboratory testsshould be taken in account.

lf the correlation between the laboratory results andthe TCU readings is low, the installation shall bechecked. Especially it shall be considered if air bubblescan occur and if the sensor tip is constantly surroundedby liquid. lt may also be helpful to check the workingprocedure in the laboratory.

lf the correlation is satisfying but there is a slope errorand/or an offset error, the calibration line can bechanged. See section 3.6.

Valmet has prepared a spreadsheet (MS-Excel) withguidelines to help with the fore mentioned task whichcan be obtained from the download section of ourwebsite at http://www.Valmet.com/conductivity (ref. No.91511.XLS).


4.2. Titration of black liquorWhen taking samples of black liquor, the followingguidelines should be observed:• The sample valve should be close to the sensor.• The sample pipe should be flushed before collecting

samples.• Take a 5–10 liter sample of black liquor over a period

of 1 minute. At the same time make a reading of theTCU average value.

• Stir the sample and make a new 500 ml sample fromthe previous one.

• Filtrate the new sample.

The procedure in the following is known as the KarinWilson method.

When titrating for determining EA and AA, theNa2CO3 as well as the neutralized hydroxy acids mightinterfere. To avoid that Na2CO3 and some of the neut-ralized hydroxy acids (NHA) are precipitated by addingBa++. Using a suitable dilution during the titration, theEA will be titrated already at pH = 11 with practicallyno influence from the non-precipitated NHA The titrationis continued to pH = 9 thus all the NHA which may in-terfere above pH = 9 are titrated.

Now the remaining Na2S is converted to a strongbase by adding formalin (pH rises). Finally, the titrationis performed to pH = 9 for determination of AA.

Equipment:• 200 ml beaker• 20 ml pipette• 50 ml burette• pH meter• Magnetic stirrerReagents:• Barium chloride solution, 200 g/l BaCl2, H2O pro liter• Hydrochloric acid 1.0 M HCl• Formaldehyde 40% neutralized by NaOH to a faint

pink colour using phenolphthalein indicator

Procedure:1. Pour 50 ml distilled water and 30 ml of barium

chloride solution in the 200 ml beaker.2. Pipette 20 ml of filtered black liquor into the beaker.3. Titrate potentiometrically with 1 M HCl until pH =

11.0 (A ml).4. Continue the titration to pH = 9.0 (B ml).5. Add 5 ml formaldehyde, wait for 30 seconds and

continue the titration until pH = 9.0 is reached oncemore (C ml).

Calculations:Effective cooking

(NaOH + 1/2 Na2S) = 2 * A g/l as NaOH(= 1.550 * A g/l as Na2O)

Active cooking(NaOH + Na2S) = 2 * (A – B + C) g/l as NaOH(= 1.550 * (A – B + C) g/l as Na2O)

Sodium hydroxide(NaOH) = 2 * (A + B – C) g/l as NaOH(= 1.550 * (A + B – C) g/l as Na2O)

Sodium sulphide(Na2S) = 4 * (C – B) g/l as NaOH(= 3.100 * (C – B) g/l as Na2O)

Example:A=10.0 ml B = 13.0 ml C = 15.0 mlEA= 20.0 g/l AA= 24 g/lNaOH = 16 g/l Na2S = 8 g/l as NaOH


4.3. Adjusting for concentrationCalibration is the procedure of entering new endpointsfor the low and high end of the basic TCU range. Thisis done from the menu points Adjust lo and Adjust hi.lf no calibration has ever been done since the applica-tion was selected, the Adjust lo will have a value equalto the low endpoint, and the Adjust hi a value equal tothe high endpoint, of the basic TCU range. Selectingan application, or reselecting the actual application, willoverwrite any adjustments with the default values.

Adjusting procedure:1. Grab samples from the process stream and read

simultaneous display readings of the TCU.2. Analyze the sample in the laboratory to get chem-

ical values.3. Read the actual value of Adjust lo and Adjust hi.4. Plot the Laboratory values (y) versus the TCU

readings (x).5. Calculate the linear regression line.6. Calculate (or read from the graph) the estimated

laboratory values corresponding to the actual valueof Adjust lo and Adjust hi.

7. Go to the menu point Adjust lo and Adjust hi andenter the estimated values.

Example:Application 194.61 (20-40 % NaOH). Since no adjust-ment has previously been done, the actual value of"Adjust lo" was found to be 20, and actual value of"Adjust hi" was found to be 40

Assume the following data are collected:

Lab. values (y)TCU reading (x)

26.3 g/l24.0 g/l

28.9 g/l27.7 g/l

32.1 g/l30.9 g/l

31.0 g/l29.2 g/l

33.6 g/l32.3 g/l

Linear regression gives the equation:y = 0.88492 * 4.87653.By entering 20 resp. 40 for x in the formula, the newlow-end and high-end values are obtained:Adjusting lo (x=20) 22.575Adjusting hi (x=40) 40.273

4.4. Changing the chemical value unitThe alkali concentration is often expressed in differentunits. Common units are:

FactorUnit

1g/l NaOH

1.2903g/l Na2O

12.903g/dl Na2O

20.6686lb/ft3 Na2O

154.612lb/gal

A recipe in g/l NaOH can be converted to anotherunit by dividing the limits with Factor and changing theunit text. 0–120 g/l NaOH corresponds to 0–5.8 lb/ft3

Na2O. "Adjust hi" must be changed from 120 to 5.8,Unit1 changed fro, "g/l" to "lb/ft3" and Unit2 changedfrom "NaOH" to "Na2O". Also the Alarm setting andmA output must be changed to the new unit.

Lab.values

TCUreading

Regression line

Adjusting hiAdjusting lo

Adjustinghi

Adjustinglo

Old values

Newvalues

Fig. 2. Adjusting for concentration.


5. Maintenance & troubleshooting5.1. Cleaning the sensorCleaning may be necessary if deposits have built upto an extent that affects the cell constant of the elec-trode part.

When cleaning the sensor do not use hard materialto scrape or grind. Use a soft brush or cloth and asuitable cleaning remedy depending on the nature ofthe deposits. Be careful not to damage the electrodesas this might affect the accuracy of the sensor.

Chemical cleaning can be applied by using any re-agent that will not affect the sensor material. Sulphamicacid (NH2SO3H) is recommended. Use 250 g in 1 litreof water. Heat the water to ease dissolving. The solutioncan be used cold or warm.

List of usable cleaning acids for sensors. Insert formax. 2h at 30°C~ 86°F• Acetic acid CH3 COOH• Citric acid C3H4 (OH) (COOH)3

• Formic acid HCOOH• Lactic acid C3H4 (OH) COOH• Nitric acid HNO3

• Oxalic acid (COOH)2, max. 40% w/w• Phosphoric acid H3PO4

• Sulphamic acid NH2SO3H• Sulphuric acid H2SO4, max. 30% w/w• Tartaric acid C2H2 (OH)2 (COOH)2

WARNING: Do not use Hydrochloric acid (HCl) or Hydro-fluoric acid (HF)!

Cleaning procedure:1. lmmerse the sensor into the sulphamic acid and

let stay for 5 minutes. The entire thick part of thesensor tip should be immersed in the acid.

2. Remove the remaining scaling using a soft brush.lt is important to remove the scaling where theelectrodes and the PTFE meet.

3. Repeat 1 and 2 if not clean. PTFE should appearwhite and intact. Electrodes should appear cleanwith a smooth metallic surface.

4. Also clean the sensor shaft all the way up. Theshaft does not need to appear with a smoothmetallic surface, but the scaling should be removedto prevent building up thick layers, which in thelong run will destroy the packing system whenpassing during the sensor withdrawal.

Fig. 1. Cleaning the sensor in acid.


5.2. Troubleshooting• Locate the problem to the monitor, the sensor,

sensor installation or to the electrical connections.If possible shift to another sensor or use a test probeto check the TCU.

• If the temperature reading is very wrong: CheckPt1000 in sensor for short circuit or interruption. Thecheck can be done by resistance measurement fromthe sensor connector.

• Temperature reading partly wrong: This error mayarise from a poor thermal contact of the Pt1000element to the sensor structure. The thermal contactcan be checked by measuring the response time fora temperature change. Another source of error maybe the installation. The steel part of the sensor withthe reduced diameter is to be fully inserted in theprocess liquor flow.

• Conductivity/process value far out of range: Checkthe sensor cable for damage and check the sensorcable connection in the monitor for broken wires.

• Is the sensor tip surrounded with process liquor?• Check the measuring section of the sensor for scal-

ing deposits and for electrode damage.• No reading in display: Check line voltage, fuses and

check that the connectors are in place.• Setting of the temperature compensation.• Setting of analog output and accordance to setting

of analog input of DCS.• Make a record of set-up info.

If help is required from factory please make a recordof the measurement display and the service display.This can be done with photos. Use backlight if possibleor illuminate the display from up or down in a 45° angleto avoid reflections (Fig. 2). Do not use flash.

Lamp

Camera

Fig. 2. Taking a photo of TCU displays.

5.3. Plug-up of measuring chamberlf the TCU is used for liquor measurements in a bypass,using a measuring chamber, the line or the measuringchamber may get plugged up, causing nonsensicalTCU readings. Black liquor, white liquor and green li-quor normally have rather stable temperatures closeto or above 100°C. lf the liquor flow for some reasonstops, the consequence is that the temperature willdrop below the normal process temperature approach-ing the ambient temperature by time.

Programming one of the alarms as a minimum alarmassigned to the temperature and with an alarm point afew degrees below the normal operating temperaturerange can be used to warn for partial or total stop ofthe liquor flow.

5.4. Checking flow rate in measuring chamberChecking the flow rate can be based on the time delayof a step change of either temperature or conductivityof the liquor.

lf the temperature is used, the flow must be stoppedon the inlet side until the chamber and piping are cooledsufficiently. Then the inlet valve should be opened asfast as possible and the time to 90% of the final temper-ature step is reached should be measured. Since the90% time of the temperature sensor is approx. 30 sec.the above 90% time for the final temperature stepshould be no more than 1 minute.

Adjusted in this way the flow is assumed to be 10-25 litres per minute, which is considered sufficientlyhigh to flush the chamber, to keep the sensor clean,and to secure a fast response of the signal. lf the pipingon the inlet side is long, additional time can be accep-ted, e.g. 5-6 sec. per metres of the piping.

lf the temperature drop compared to fully open valvesis more than 0.2–0.5°C, insulating the piping andchamber should be considered.


5.5. Removing & mounting sluice sensorRemoving (Fig. 3)1. Turn the safety bushing on the handle of the

sensor until it can be released.2. Using both hands turn the handle until free.3. Let the sensor move out under control until stop.4. Close the sluice valve.5. Unscrew the sensor from the sluice chamber.

1

2

3

4

Fig. 3. Removing the sluice sensor.

Mounting (Fig. 4)1. When ready, remount the sensor. Be sure that the

O-ring is not damaged.2. Open the ball valve.3. Using both hands press in the sensor and turn the

handle until fixed.4. Turn the safety bushing on the handle, until it can

be fastened.

O-ring1

2

3

Fig. 4. Mounting the sluice sensor.


5.6. Spare partsNormal use of the TCU does not require consumptionof chemicals or similar. The monitor contains no wear-ing components.

Spare sensors are recommended, since the sensoris the most exposed part of the system.

Spare packing items are recommended for thesensors:For sensors 4221 and 4226:• 15852 Packing ring (4 pcs for each sensor)• 51393 O-ring (3 pcs for each sensor)• 51338 O-ring 44.2 x 3.0 for sensor sluiceFor sensors 4336–4339:• 160.91 PTFE gasket with O-ringFor sensors 4221–4225:• 156.55 Gasket

Cable

1

11

Rx

Rx Simulatedconductivity

1101001 k

200 mS/cm20 mS/cm2 mS/cm200 µS/cm

Test probe

Pink/gray Common sense

Green Pt1000 senseYellow Pt1000Gray Rcc sensePink RccBlue I2Red U2Black GroundWhite U1Brown I1

Red/Blue Common

Rt

Rcc

1100 for26°C temp.reading

2k for CC = 0.2

Fig. 5. Sensor connection and text probe.

5.7. Test equipmentTest probe type 19041.

Pos.12

Simulatedtemperature

90.1 °C25 °C

Fig. 6. Test probe.

Pt 1000Rcc

Open type sensors

CommonRccsense

Rcc Commonsense

Pt1000 Pt1000sense

GNDI1 U1 U2 I2

Fig. 7. Sensor connection diagram.


5.6. Spare partsNormal use of the TCU does not require consumptionof chemicals or similar. The monitor contains no wear-ing components.

Spare sensors are recommended, since the sensoris the most exposed part of the system.

Spare packing items are recommended for thesensors:For sensors 4221 and 4226:• 15852 Packing ring (4 pcs for each sensor)• 51393 O-ring (3 pcs for each sensor)• 51338 O-ring 44.2 x 3.0 for sensor sluiceFor sensors 4336–4339:• 160.91 PTFE gasket with O-ringFor sensors 4221–4225:• 156.55 Gasket

Cable

1

11

Rx

Rx Simulatedconductivity

1101001 k

200 mS/cm20 mS/cm2 mS/cm200 µS/cm

Test probe

Pink/gray Common sense

Green Pt1000 senseYellow Pt1000Gray Rcc sensePink RccBlue I2Red U2Black GroundWhite U1Brown I1

Red/Blue Common

Rt

Rcc

1100 for26°C temp.reading

2k for CC = 0.2

Fig. 5. Sensor connection and text probe.

5.7. Test equipmentTest probe type 19041.

Pos.12

Simulatedtemperature

90.1 °C25 °C

Fig. 6. Test probe.

Pt 1000Rcc

Open type sensors

CommonRccsense

Rcc Commonsense

Pt1000 Pt1000sense

GNDI1 U1 U2 I2

Fig. 7. Sensor connection diagram.

User manual K14927 V1.0 EN25Conductivity TCU series 3400

1 (1)

Cooking TCU 3400 Technical specification

© Valmet Automation Inc. All rights reserved.

Conductivity range .............. 0 nS/cm…2 S/cm (0 1S/m… 200S/m) at reduced accuracy up to 100 S/cm (10000S/m)

Accuracy ............................. 2σ values for cell constant=0.2 ±0.5% 40nS/cm…200mS/cm ±2.5% 200mS/cm … 2S/cm Electrode system ................. 2 or 4 electrodes Cell Constant range ............ Automatic 0.01 to 5;

Manual 0.0001 to 99999 Temperature sensor ............ Pt1000, 4-wire interface Temperature range ............. -40°C to +250°C Sampling rate ...................... 1 sample/sec in normal mode;

3 sample/sec. in fast mode Display ................................ Graphic LCD with Backlight in

line-powered types Current outputs Line-powered version .......... Two galvanically isolated 4–20

mA outputs, sharing the return. Voltage capacity: 16V@20mA. Voltage to ground max. ±85V Resolution 16 bit. Linearity: ± 0.02%. Endpoints: ± 0.2%

Loop-powered version ......... Two galvanically isolated 4–20 mA passive outputs, one of which is the power supply for the instrument. Voltage 16–30 V on mA1. Voltage 6–30V on mA2. Other specifications as for the line-powered version.

Control inputs ...................... Two galvanically isolated inputs sharing a common return. lnput voltage: +12 to 30V DC referred to common. Voltage to ground max. ± 85V

Alarm Line-powered version ......... Two relays: One NO contact

each. Contact rating 250VAC 6A, make current 15A, Max. breaking capacity 1500VA. Max. break Voltage 400VAC. Dielectric strength coil-contact 4000V

Enclosure ............................ lP65 when front cover open lP67 when front cover closed

Temperature ranges ............ Operation -10 to +60°C Storage -20 to +70°C

Power supply Line-powered version .......... 85–265Vac, 50–60Hz, 5VA Loop-powered version ......... 16–30V on mA1 Housing ............................... Cast aluminium, painted.

Applications – Cooking recipes

Recipe Application Sulphate process cooking liquor,

residual cooking after impregnation phase in batch or continuous digesters.

196.06a 0–70 g/l EA NaOH,, 20-180°C 196.06b 0–54 g/l EA Na2O, 20-180°C Clarified white liquor from filter, clarifier

tank, or storage tank, causticizing efficiency and sulphidity is made adjustable for improved accuracy. Causticizing range: 70–90% Sulphidity range: 15–50%

196.15a 0–155 g/l EA NaOH, 20–150°C 196.15b 0–120 g/l EA Na2O, 20–150°C 196.15c 0–155 g/l AA NaOH, 20–150°C 196.15d 0–120 g/l AA Na2O, 20–150°C 196.15f 0–7.5 lb/ft3 AA Na2O, 20–150°C Sulphate process transfer circulation

liquor in conventional hydraulic continuous digesters, sulphidity is made adjustable for improved accuracy.

196.34a 0–120 g/l EA NaOH, 20–180°C 196.34b 0–100 g/l EA Na2O, 20–180°C G.O.S. to be used in the RDH batch

process 196.63 0–60 g/l EA NaOH, WF2 196.64 0–60 g/l EA NaOH, HF2 196.65 0–60 g/l EA NaOH, Circulation G.O.S. to be used in the MCC and lTC

hydraulic continuous process 196.68 0–40 g/l EA NaOH, lTC 196.69 0–40 g/l EA NaOH, Trim Oxidized white liquor after the 2nd

oxidizing tank 196.44 70–130 g/l EA NaOH, 25–110°C Pure solutions 196.58 NaOH, 0-10%, 0–100°C 196.33/3 NaOH, 0-150 g/l, 20–100°C 196.62 HNO3 , 0-20%, 0–90°C 196.56 NaCl, 0-10%, -5 –100°C 196.60 SO2 , 0-25 g/l, 0–50°C G.O.S. for special use in cooking

process 196.74 0–100 units Conventional hydraulic cooking 196.75 0–100 units Continuous cooking process 196.76 0–100 units Super Batch process 196.77 0–100 units RDH process G.O.S. for special use in the sulphate

process

196.06, 196.15, 196.34

For more information, contact your local Valmet office. www.valmet.com Specifications in this document are subject to change without notice. Product names in this publication are all trademarks of Valmet Corporation.©

Val

met

Cor

pora

tion,

D07

501

V1.

0 EN

04/

2015

18

110 283183

35

150

84

100

18

125

Sensor for white liquor & cooking liquor

Cooking Liquor Sensor 4364

4-electrode conductivity sensor with external electrodes. Used with TCU series 3400.

Technical data

Materials PTFE and steel W 1.4404 (EN 10028-7 or EN 10222-5)

Flange Weld neck PN40, DN40 (EN 1092-1)

Pressure max. 25 bar at 180 °C

Cell constant 1.0 ± 0.5% (electrically adjusted)

Reproduceability ± 1.0%

Linearity ± 1.0% per decade

Temp. sensor Pt 1000 (IEC 751 class A)

Time delay T90, 30 sec.

Protection IP65 splash-proof (DIN 40 050)

Sensor cable PVC 12 x 0.25 mm2

standard length 5 m

max. temp. 70 °C

Connection 11-pole strip connector with MF20 cable adapter

Weight 4.2 kg

Typical mounting

- dimensions in millimeters

Stopvalve

Blowvalve

Cooking liquor

Stopvalve

Cooling panel

Sensor

Packingkit

Sample

Samplevalve

1-wayvalve

Rinsevalve

UP

Meas.pipe

Coolingwatervalve

Cooling water

Cooking sensor for high consistency pulp

Cooking Sensor 4366

4-electrode sensor with external electrodes. Used with TCU series 3400.

Technical data

Materials PTFE and steel W 1.4404 (EN 10028-7 or EN 10222-5)

Flange: Weld neck PN40, DN40 (EN 1092-1)

Pressure max. 25 bar at 180 °C








standard length 5 m

max. temp. 70 °F


Weight 4.2 kg

Mounting in M&D sawdust process

2.Post-

digester

Woodmaterial

WL

White liquor

WL

WL

BL BL

WL

BL

1.Post-

digester

Pulp

M&D Diges

ter

4366 sensor

Sensor must be mountedbelow this level


Val

met

Cor

pora

tion,

D07

502

V1.

0 EN

04/

2015

Typical mounting

Protective cutter of heavy W 1.4404 steel plate

35

215

10

30°

Flow direction

200

Min. 105 100

52

199

10

90

18

150

9366 or 4366Cooking sensor

dimensions in inches

4.5 11.1 0.79

5.5

7.2

3.3

0.88 1.38

6.1

4

Cooking sensor for white liquor & cooking liquor

Cooking Sensor 4367

4-electrode sensor with external electrodes. Used with TCU series 3400.

Technical data

Materials Sensor: PTFE and steel W 1.4404 (316L; ASTM A 182M)

Flange: Weld neck 1.5” class 300 (ASME B16.5)

Pressure max. 215 psig (15 bar) at 356 °F (180 °C)








standard length 15 ft

max. temp. 160 °F


Weight 11.5 lb


Val

met

Cor

pora

tion,

D07

503

V1.

0 EN

04/

2015

Typical mounting

Protective cutter of heavy AISI 316 steel plate

8.5”

0.4”

30°

Flow direction

7.9”

Min. 4.1”

4”

2”

7.8”

0.16

”

3.5”

9367 or 4367Cooking sensor


Val

met

Cor

pora

tion,

D07

504

V1.

0 EN

04/

2015

0.88

4.5 11.17.2

1.38

6.1

3.3

4

0.79

5.5

Stopvalve

Blowvalve

Cooking liquor

Stopvalve

Cooling panel

Sensor

Packingkit

Sample

Samplevalve

1-wayvalve

Rinsevalve

UP

Meas.pipe

Coolingwatervalve

Cooling water

Sensor for white liquor & cooking liquor

Cooking Sensor 4368

4-electrode conductivity sensor with external electrodes. Used with TCU series 3400.

Technical data

Materials Sensor: PTFE and steel W 1.4404 (316L; ASTM A 182M)

Flange: Weld neck 1.5” class 300 (ASME B16.5)

Pressure max. 215 psig (15 bar) at 356 °F (180 °C)








standard length 15 ft

max. temp. 160 °C


Weight 11.5 lb

Typical mounting

dimensions in inches

10.6” (270)

10” (

255)

0.94”(ø24)

30.8

” (78

2)

1.38”(ø35)

3.3”

(84)

4”

(100)

1.9”

(ø48

.3)

7.9” (200)

12.6” (321) 11.1” (282)

1.9”

(ø48

.3)

1.4”(34) 1”

(26)

1.5”

RG

7.9” (200)

1.4”(34)

1.9”

(ø49

)

1.9”

(ø48

.3)

12.4” (316)

1.5”

RG

1”(26)

Cooking sensor for white liquor & cooking liquor, sluice mounting

Cooking Sensor 4374

Used with TCU series 3400.

Technical data

Materials Steel W 1.4404 (AISI 316L) and PTFE

Max. pressure at 100 ºC/210 ºF: 15 bar / 220 psi

at 150 ºC/300 ºF: 10 bar / 150 psi

Max. pressure during withdrawal 5 bar (70 psi)

Sensor cable standard length 5 m (15 ft)

max. temp. 70 °C

Connection 11-pole strip connector

Weight Sensor 4374: 5.0 kg

Sluice 560: 4.5 kg

Sluice 563: 3.3 kg

560 sluice with weld end

563 sluice for flange welding

dimensions in inches (mm)


Val

met

Cor

pora

tion,

D07

506

V1.

0 EN

04/

2015

12.6” (321)

16.4” (416) 21.1” (537)

min. 8” (203)UP

min. 8” (203)

16.4” (416) 21.1” (537)1.4”(34)

1.7”(42)DN40

PN16

2.4”(62)

1.4”(34)

16.4” (416) 21.1” (537)

Typical mountingMax. pressure during withdrawal 5 bar (70 psi)

Bend installationSluice valve type 560

Upstream installationSluice valve type 563

Downstream installationSluice valve type 563

– dimensions in inches (mm)


Val

met

Cor

pora

tion,

D07

723

V1.

0 EN

04/

2015

10 ⅝” (270)

10” (

255)

15/16”

(ø24)30

19/ 32

” (78

2)

1 ⅜”(ø35)

3 9 / 32

”

(83.

7)

8”

(200)

1.9”

(ø48

.3)

7.9” (200)

12.6” (321) 11.1” (282)

1.9”

(ø48

.3)

1.4”(34) 1”

(26)

1.5”

RG

min. 4” (100)

For green liquor pipe, sluice mounting

Causticizing Sensor 4375

4-electrode conductivity sensor. Used with TCU series 3500.

Technical data

Materials Steel W 1.4404 (AISI 316L) and PTFE

Sensor cable standard length 15 ft (5 m)

max. temp. 70 °C

Pressure max. pressure during withdrawal 70 psi (5 bar)

Max. pressure / temperature

- at 15 bar 100 °C

- at 10 bar 150 °C

- at 220 psi 210 °F

- at 150 psi 300 °F

dimensions in inches (mm)

Mounting

Mount the sensor in a place where no air pockets of bubbles occur. When installing to a downstream pipe, a flow damper may be needed just after the measuring point. Install a sampling valve close to the sensor.

560 sluice with weld end

Typical mounting

D07614 V1.0 HART® Field Device Specification

Valmet Automation

Series 3000 revision 3

® HART is a registered trademark of HART Communication Foundation

1. Introduction 1.1 Scope

This document describes the implementation of the HART 6.0 protocol for the following Field Devices: Valmet Conductivity TCU types 3107H, 3108H,

3117H, 3118H Valmet Concentration TCU types 3307H, 3308H,

3317H, 3318H Valmet Conductivity TCU types 3407H, 3408H,

3417H, 3418H Valmet Causticizing TCU types 3517H, 3518H

The document is designed to complement the specific installation and user manual. This document assumes that the reader is familiar with HART Protocol requirements and terminology. Abbreviations and definitions HCF = HART Communication Foundation Pt1000 = 1000-ohm Platinum (temperature sensor) TCU = Transmitter Control Unit References

HART Smart Communications Protocol Specification. HCF_SPEC-12 Rev. 6.0.

- available from HCF. Series 3100 Conductivity TCU Manual Series 3300 Concentration TCU Manual Series 3400 Cooking TCU Manual Type 3517 Causticizing TCU Manual

- available from Valmet

2. Device Identification 2.1 Series 3000 TCU Manufacturer: Valmet Model names: 3x07H, 3x08H, 3x17H, 3x18H x can be 1, 3, 4 or 5 Manufacture ID code: 187 (BB Hex) Device type code: 123 (7B Hex) HART protocol revision: 6.0 Device revision: 1 No. of device variables: none Physical layers supported: FSK Physical device category: Transmitter, Isolated Bus Device 3. Product Overview The TCU is based on 4-electrode conductivity and temperature measurement. Each TCU has four set-up modes, each holding a separate set of temperature compensation or concentration recipe, output setting, alarm setting etc. The set-up mode can be selected from the TCU keyboard, from digital input, or from a device-specific command.

Valmet TCU series 3000 rev. 3 HART® Field Device Specification

Valmet Automation Inc. 2 D07614 V1.0

4. Product Interfaces 4.1 Process Interface

The TCU is designed to be used with series 4100, 4200 and 4300 conductivity sensors. Sensor connections are documented in the TCU manual. 4.2 Host interface 4.2.1 Analog outputs 4 – 20 mA The TCU has two 4 – 20 mA outputs called mA1 and mA2 where mA1 carries the HART signal. The capacitance number CN = 1.5. The mA outputs are isolated from measuring circuit and power supply. In the loop-powered TCU the outputs are isolated from each other whereas they share a common return in the line-powered TCU. The outputs are not used for indication of malfunction or alarm status. The user can select the variable and its range for each analogue output. See specific TCU manual. Usually PV (temperature compensated conductivity or concentration) is put on mA1, and SV (temperature) is put on mA2. Line-powered TCU Direction

Values (% of

range) Values

(mA or V)

Linear over-range

Down 0±0.2% 4.0 mA

Up 100±0.2% 20.0 mA

Max. current 100.2% 20.04 mA

Multi-Drop current draw 4.0 mA

Lift-off voltage N.A.

Loop-powered TCU Direction

Values (% of

range) Values

(mA or V)

Linear over-range

Down 0±0.2% 4.0 mA

Up 100±0.2% 20.0 mA

Max. current 100.2% 20.04 mA

Multi-Drop current draw 4.0 mA

Lift-off voltage mA1 16.0 V

Lift-off voltage mA2 5.0 V 4.2.2 Discrete output – Alarm relays Two alarm relays, each with a single contact, are available on the line-powered TCU. The relays are controlled by the limit-based alarms or alarm relay1 is used for autoclean sensor wash cycle. For detailed information, see specific TCU manual. 4.2.3 Analog inputs There is no analog input.

4.2.4 Discrete inputs Two discrete inputs, A and B, can be used for selection of the active set-up if set-up select is set to external. Signal level is +12V to +30 V.

4.2.5 Alternative physical layer for HART There is no alternative physical layer for HART.

4.3 Local interfaces 4.3.1 Local keyboard and display The TCU has a local keyboard and display. For detailed information see TCU manual. In menu System→HART mode it is possible to select Read/Write or Read only or Off. In menu System→HART version it is possible to select HART version 5 or version 6. This only affects the answers to Cmd 0 and Cmd 15 to conform to the specific version requirements. 4.3.2 Internal jumpers and switches This TCU has no jumpers or switches. 5. Device Variables This TCU do not expose Device Variables.

6. Dynamic Variables

DESCRIPTION UNITS PV Temperature

compensated conductivity Concentration

µs/cm~67 for UPW-set-up ms/cm~66 for STD and CCS set-up %~57 or ms/cm~66 or g/l~97 or ppm~139 depending on recipe for Concentration and Cooking set-up

SV Temperature °C~32 or °F~33 depending on TCU setting

TV Uncompensated conductivity µS/cm~67

QV Scaling only with sensors series 4364-4369 and 4397

%~57

7. Status Information

7.1 Device status

See Section 7.3 for setting of bit 7 Device Malfunction and bit 4: More status Available. 7.2 Extended Device Status

Not used.



7.3 Additional Device Status - Command #48

Command #48 returns 8 bytes of data, with the following status information:

Byte Bit Meaning Class Device Status

Bits Set

0

0 Unusable Sensor Current Error 4, 7

1 Unusable Sensor Voltage Error 4, 7

2 Illegal value of Rck Error 4, 7

3 Illegal value of Rpt1000 Error 4, 7

4 PV limited or faulty Error 4, 7

5

Process temperature outside valid range

Warning 4

6 Not used

7 Not used

1

0 Alarm 1 Warning 4

1 Alarm 2 Warning 4

2-7 Not used

2 0-1 Actual Set-up Table 11.1 Info

3 0-2 Set-up type Table 11.2 Info

4-7 0-7 Not used

"Not used" bits are always set to 0. 8. Universal Commands Command #14: Sensor serial number is not used, the command will return 0 9. Common-Practice Commands

9.1 Supported Common-Practice Commands

33 Read Device Variables 35 Write Primary Range Value 38 Reset Configuration Changed Flag 40 Enter/Exit Fixed Current Mode 42 Preform Device Reboot 44 Write Primary Variable Units 48 Read Additional Device Status 59 Write Number Of Response Preambles 73 Find Device (Identity Command)

9.2 Burst Mode and Catch Device Variable Not supported

10. Device-Specific Commands

Device-specific commands are implemented to facilitate the use of different set-ups and to make it possible to calibrate reading of concentration when using recipes (TCU 3300, 34 and 3500) inclusive change of chemical unit. For the 130, 132 and 134 commands, information is written only to the actual set-up. The setting is preserved during power loss and switch from actual set-up. It is lost when a new recipe is selected for the actual set-up. 10.1 Command 128 Read set-up

Return setting of set-up. Request Data Bytes

Byte Format Description

None Response Data Byte


0 Unsigned-8 Requested set-up. Table 11.1

1 Unsigned-8 Actual set-up. Table 11.1

2 Unsigned-8 Set-up type. Table 11.2 Command-Specific Response Codes

Code Class Description

0 Success No Command Specific Errors

10.2 Command 129 Write set-up

Request Data Bytes


0 Unsigned-8 Requested set-up Table 11.1

Response Data Byte


0 Unsigned-8 Requested set-up Table 11.1

Command-Specific Response Codes



3 Error Passed parameter too large

5 Error Too few data bytes received

7 Error In write protect mode



10.3 Command 130 Write Unit Text

Request Data Bytes


0 Unsigned-8 Set-up. Table 11.1

1-7 Latin-1 Unit1 Text

8-14 Latin-1 Unit2 Text Response Data Byte


0 Unsigned-8 Actual set-up Table 11.1


8-14 Latin-1 Unit2 Text Command-Specific Response Codes





12 Error Wrong set-up 10.4 Command 131 Read Unit Text

Request Data Bytes






8-14 Latin-1 Unit2 Text Command-Specific Response Codes



10.5 Command 132 Write adjust hi/lo

Request Data Bytes


0 Unsigned-8 Set-up Table 11.1

1-4 Float Adjust hi

5-8 Float Adjust lo Response Data Byte



1-4 Float Adjust hi

5-8 Float Adjust lo

Command-Specific Response Codes





12 Error Wrong set-up 10.6 Command 133 Read adjust hi/lo

Request Data Bytes


None

Response Data Byte



1-4 Float Adjust hi

5-8 Float Adjust lo Command-Specific Response Codes





10.7 Command 134 Write Recipe Text

Line 2 in display. Request Data Bytes


0 Unsigned-8 Set-up Table 11.1

1-21 Latin-1 Recipe Text

Response Data Byte



1-21 Latin-1 Recipe Text Command-Specific Response Codes





12 Error Wrong set-up 10.8 Command 135 Read Recipe Text.

Line 2 in display. Request Data Bytes





1-21 Latin-1 Recipe Text Command-Specific Response Codes



11. Tables

11.1 Set-up codes

Code Description Set-up Requested Set-up

0 Set-up 1 Possible Possible




4 Set-up selection via digital input

Not possible Possible

11.2 Set-up types

Code Description 0 Ultra Pure Water conductivity

1 Standard conductivity

2 Concentration

3 Cooking

4 Causticizing 11.3 Unit codes

11.4 Transfer function codes

Code Description 0 Linear

240 0-x-∞ (Infinity)

Code Description

32 °C Degrees Celsius

33 °F Degrees Fahrenheit

57 % Percent

66 mS/cm Milli Siemens per centimeter

67 µS/cm Micro Siemens per centimeter

94 lb/ft3 Pounds per cubic feet

97 g/l Grams per litre

139 ppm Parts per million

240-249 User defined. Not allocated



12. Performance

12.1 Sampling rates

Normal mode 1 per second Fast mode 3-4 per second

In every cycle the sensor input is sampled, process values are calculated, display, mA-outputs and alarms are updated. 12.2 Power-Up

After power-up, the device will respond to HART commands after approximately 1 second and the first measurement result will come after approximately 3 seconds. The outputs will be set to 4 mA and alarm relays will be unpowered until first update. Fixed current mode setting from command 40 is cancelled. 12.3 Reset

The resetting caused by command 42 is identical to the power-up sequence. (See Section 12.2) 12.4 Self-Test

Self-test is not implemented. 12.5 Command response time

Minimum 5 ms Typical 20 ms Maximum 60 ms

12.6 Busy and Delayed-Response

Busy and Delayed-Response is not used 12.7 Long Messages

The largest data field is used in response to command 9: 35 bytes inclusive 2 status bytes. 12.8 Non-Volatile memory

EEPROM is used to hold the devices configuration parmeters. New data is written to this memory immediately on execution of a write command. 12.9 Modes

Fixed current mode is implemented using Command 40. This mode is cleared by power loss and reset. The device has 4 different set-up modes which can be selected from local keyboard, from remote digital input, or with Device Specific commands. (Command 128 and 129) 12.10 Write protection

Write protect can be selected in menu: System→HART mode. This does not affect changes made from the local keyboard.

Capability Check List Manufacturer, model and revision

Valmet Automation Inc., series 3000, Rev.3

Device type Transmitter

HART revision 6,0 Device Description available No

Number and type of sensors 1

Number and type of actuators 0

Number and type of host side signals 2 pcs: 4–20mA analog

Number of Device Variables 0

Number of Dynamic Variables 4

Mapable Dynamic Variables? No

Number of common-practice commands 9

Number of device-specific commands 8

Bits of additional device status 13

Alternative operating modes? Yes

Burst mode? No

Write-protection? Yes

EN FR FI ES SV PT DE IT NL PL RU

EU

DECLARATION OF CONFORMITY VAATIMUSTENMUKAISUUSVAKUUTUS KONFORMITETSDEKLARATION KONFORMITÄTSERKLÄRUNG CONFORMITEITSVERKLARING ДЕКЛАРАЦИЯ СООТВЕТСТВИЯ

DECLARATION DE CONFORMITE DECLARACION DE CONFORMIDAD DECLARAÇÃO DO CONFORMIDADE DICHIARAZIONE DI CONFORMITA DEKLARACJA ZGODNOŚCI

Manufacturer – Valmistaja – Fabrikant – Hersteller – Fabrikant – Производитель – Fabricant – Fabricante – Fabricante – Fabriccante – Producent

Valmet Automation Oy Kehräämöntie 3 / P.O.Box 177 87101 Kajaani, FINLAND

Device – Laite – Enheten – Gerät – Apparaat – Устройство – Artifice – Dispositivo – Dispositivo – Dispositivo – Urządzenie

Valmet Conductivity Measurements

Series 3400 Cooking Liquor Measurements

with corresponding sensors

This product is in conformity with the requirements of the following directives, and with standards and national legislation implementing these directives:

Tuote täyttää seuraavien säännösten asettamat vaatimukset sekä nämä voimaansaattavat kansalliset päätökset:

Denna produkt uppfyller kraven i följande direktiv och standarder samt nationell lagstiftning som inför dessa direktiv:

Dieses Produkt erfüllt die folgenden Richtlinien und Normen und die nationalen Gesetze, die die Anwendung der obigen Richtlinien durchsetzen:

Dit product is in overeenstemming met de eisen van de volgende richtlijnen en met normen en nationale wetgeving ter uitvoering van deze richtlijnen: Данное изделие соответствует требованиям следующих директив, а также стандартам и национальным законодательным актам, вводящим в действие данные директивы:

Le produit est conforme aux directives et normes suivantes, et les dispositions nationales portant mise en œuvre desdites directives:

Este producto es conforme a los requisitos de las siguientes directivas y normas y legislación nacional de aplicación de estas directivas:

Este produto obedece aos requisitos das directivas e normas abaixo mencionadas e legislação nacional que transpõe as referidas directivas para o direito interno:

Questo prodotto è conforme ai requisiti delle seguenti direttive, norme e standard e legislazione nazionale implementata sulla base di queste direttive:

Ten produkt jest zgodny z wymaganiami następujących dyrektyw oraz ze standardami i przepisami krajowymi dotyczącymi wdrożenia tych dyrektyw:

Loop-powered models:

2014/30/EU (EMC Directive) 2014/68/EC (Pressure Equipment Directive) The sensors are classified in Category II (Annex II) as pressure accessories

for fluids in Group 1. Manufacturing according to Module A1 (Annex III)

2002/95/EC (RoHS Directive) 2012/19/EU (WEEE Directive)

Line-powered models:

2014/30/EU (EMC Directive) 2014/35/EC (Low Voltage Directive) 2014/68/EC (Pressure Equipment Directive) The sensors are classified in Category II (Annex II) as pressure accessories

for fluids in Group 1. Manufacturing according to Module A1 (Annex III)

2002/95/EC (RoHS Directive) 2012/19/EU (WEEE Directive)

Juha Koistinen Vice President

Valmet Automation Oy Control & Measurement Systems

Signature – Allekirjoitus – Underskrift – Unterschrift – Handtekening – Подпись – Signature – Firma –

Firma – Assinatura – Podpis

Clarification of signature, position – Nimenselvennys, asema – Namnförtydligande, befattning – Unterschrift in Maschinenschrift, Position – Verduidelijking van handtekening, positie –

Расшифровка подписи, должность – Nom en toutes letters, fonction – Nombre y cargo – Nome en função do assinante – Firma in stampatello, mansione – Imię i nazwisko, stanowisko

Valmet Automation Inc.Kehräämöntie 3 / P.O.Box 177FI-87101 Kajaani, Finlandtel. +358 10 672 0000, fax +358 10 676 1981www.valmet.com

This document is the exclusive intellectual property of Valmet Corporation and/or its subsidiaries (collectively “Valmet”) and is furnished solely for operating and maintaining the supplied equipment and/or software. Use of the document for any other project or purpose is prohibited. All copyrights to the document are reserved by Valmet. Accordingly, the document or the information contained therein shall not (whether partly or entirely) be reproduced, copied or disclosed to a third party without prior written consent of Valmet.

Copyright © 07/2016Valmet Automation

valmet cooking liquor measurement series 3400 · 1.2. sensors. sensors are based on the 4-electrode...

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