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midi LOGGER

SERVICE MANUAL

820GL820-UM-251

GL820-UM-251-02-9370

GL820-UM-251-9370 i

HISTORY OF REVISIONSNo. Date issued Description of revision Page Edition1 10.02.18 First Printing All 012 10.04.06 The size of screws were corrected. 3-5, 3-8 02345

GL820-UM-251-9370 ii

TO ENSURE SAFETYThis Service Manual has been compiled for the purpose of facilitating repair and maintenance of the GL820 midi LOGGER by Graphtec service personnel and other persons who have undergone equivalent technical training.Maintenance or repair by unauthorized service personnel is to be strictly avoided. Because the GL820 contains numerous internal components with a high electric potential, such work by unauthorized service personnel could cause human injury or serious damage to the GL820 midi LOGGER.

GL820-UM-251-9370 iii

CONTENTS1. CONFIGURATION ................................................................................. 1-1

1.1 Model Configuration .....................................................................................................1-11.2 Accessories and Options .............................................................................................1-1

2. UPGRADING THE FIRMWARE ............................................................ 2-12.1 Note for the firmware upgrading ..................................................................................2-12.2 How to Upgrade the GL820 Flash ROM from the USB memory device ...................2-1

3. DISASSEMBLY AND REASSEMBLY ................................................... 3-13.1 Notes on Disassembly and Reassembly ....................................................................3-13.2 Removing the Input Terminal Unit ...............................................................................3-23.3 Removing the Side Pads ...............................................................................................3-33.4 Disassembling the Top Cover and the Bottom Case Assembly .............................. 3-43.5 Replacing the Main Control Board ..............................................................................3-53.6 Replacing the Control Panel Board ............................................................................ 3-63.7 Replacing the LCD and the Top cover .........................................................................3-73.8 Replacing the AMP Board ........................................................................................... 3-8

4. SETUP PROCEDURES ......................................................................... 4-14.1 Entering the System Setup Menu ................................................................................4-14.2 AC Line cycle Setting ................................................................................................... 4-34.3 Performing Setup1 (Voltage Input) ............................................................................. 4-44.4 Performing Setup2 (Room Temperature Compensation) ......................................... 4-84.5 Performing Setup3 (RTD)............................................................................................4-12

5. INSPECTION AND CHECK PROCEDURES ........................................ 5-15.1 Preparations for inspections .......................................................................................5-1

5.1.1 AC Line Setting .....................................................................................................................5-15.1.2 Sampling setting ....................................................................................................................5-15.1.3 Copy the condition settings file .............................................................................................5-15.1.4 How to load the condition settings file to the GL820 from a USB memory device ...............5-2

5.2 Voltage Measurement Accuracy ................................................................................. 5-65.3 Temperature Accuracy ................................................................................................. 5-95.4 RTD Accuracy ..............................................................................................................5-11

6. PARTS LISTS ........................................................................................ 6-16.1 Recommended Parts List .............................................................................................6-16.2 Parts Lists ......................................................................................................................6-2

6.2.1 Outer Casing .........................................................................................................................6-26.2.2 Bottom Parts .........................................................................................................................6-36.2.3 Top Parts .............................................................................................................................. 6-46.2.4 Bottom Case ........................................................................................................................ 6-66.2.5 Terminal Unit ........................................................................................................................ 6-66.2.6 Standard Accessories ...........................................................................................................6-7

7. Block Diagram ...................................................................................... 7-17.1 Main Unit Power Block & Main Control ....................................................................... 7-17.2 Main Control Block ........................................................................................................7-27.3 AMP Block ......................................................................................................................7-37.3 Details of the AMP .........................................................................................................7-4

GL820-UM-251-9370 1-1

1. CONFIGURATION

1. CONFIGURATION

1.1 Model ConfigurationGL820 : 20-channel model with color monitor and internal memory

1.2 Accessories and OptionsUnit name Model

nameDescription

Logic / Alarm cable B-513DC Drive Cable B-514 Same as GL200/450/500Battery Pack B-517 Same as GL200/450/500Humidity Sensor B-530 Same as GL200/450/500Extended Terminal Base Unit B-537 Option20 Ch Extended Terminal Unit B-538 OptionRod-shaped K-type thermocouple RIC-410K-type thermocouple for static surfaces RIC-420L-shaped K-type thermocouple for static surfaces RIC-430

GL820-UM-251-9370 1-2

1. CONFIGURATION

GL820-UM-251-9370 2-1

2. UPGRADING THE FIRMWAREThe version of your GL820’s firmware can be upgraded by rewriting the flash ROM on the pertinent circuit boards. You can upgrade the firmware by loading the update program to a USB memory device.

2.1 Note for the firmware upgrading• Save the measuring condition to the internal memory or the USB memory before the firmware upgrade.• Don't turn off the power during upgrading the firmware.

2.2 How to Upgrade the GL820 Flash ROM from the USB memory device

Preparations for the upgradeFirmware :MainVerxxxRevxxxxAxx.GL820 ← Main Program file for GL820 :PatternVerxxxRevxxxxAxx.GL820← Font file for GL820

(1) Connect the AC adapter for the GL820.(2) Turn on the GL820.(3) Copy the two files to a USB memory device from the computer. (Copy the two main program files to root directory of a USB memory. Do not copy them to any folder.)

How to upgrade(1) Insert the USB memory device containing the main upgrade program into the GL800's USB port.

GL820-UM-251-9370 2-2

2. UPGRADING THE FIRMWARE

(2) Turn on the GL820 to display the menu below. And then select the upgrade program file by using the [UP Arrow] direction key or the [Down Arrow]

direction key.

(3) Press [ENTER] key to execute the upgrade.(4) Wait until the display shown below appears or until the beeper sound stops. Note: Don't turn off the GL820 until this process is finished.

The following message will appear on the GL820 display in yellow characters when the upgrade is complete. Also the beeper will sound for 5 seconds.“Please Turn Off the Power. I have locked up.”

GL820-UM-251-9370 2-3

(5) Turn off the power to the GL820 when the above message is displayed or when the beeper sound stops.

(6) Delete the two program files from a USB memory device.This is to avoid upgrading the firmware by mistake.

GL820-UM-251-9370 3-1

3. DISASSEMBLY AND REASSEMBLY

3. DISASSEMBLY AND REASSEMBLY3.1 Notes on Disassembly and Reassembly

• During disassembly, disconnect the cables from the specified connectors as necessary.• During reassembly, double-check to ensure that the proper cables have been correctly re-connected to

the pertinent connectors.• Some areas of the control panel unit possess a high electrical potential, so exercise caution to avoid an

electrical shock.

GL820-UM-251-9370 3-2


3.2 Removing the Input Terminal Unit

Disassembly(1) Remove the input terminal unit as shown in the picture below. Pull the terminal unit out towards the direction indicated by the arrow while pressing the two locks at the

bottom of the unit.(1) Press the two locks in the direction indicated by arrows.

(2) Pull the unit out towards the direction indicated by the arrow.

GL820-UM-251-9370 3-3


3.3 Removing the Side Pads

Disassembly(1) Peel off the left and right side pads from the main unit.

Right side pad

Left side pad

Main unit

Re-assembly(1) Push the left and right side pads against the main unit and then install them on the main unit.

GL820-UM-251-9370 3-4


3.4 Disassembling the Top Cover and the Bottom Case Assembly

Disassembly(1) Remove the input terminal unit from the main unit (See Section 3.3).(2) Remove the side pads from the main unit (See Section 3.4).(3) Remove the four M2L8 self-tapping screws from the bottom cover.(4) Disconnect the connector between the main control board and the AMP board and then remove the top

cover assembly.

M2L8 self-tapping screw

Top cover assembly

Bottom case assembly

Re-assembly(1) Re-assemble the top cover assembly and the bottom case assembly in the reverse order in which they

were disassembled.

GL820-UM-251-9370 3-5


3.5 Replacing the Main Control Board

Disassembly(1) Remove the input terminal unit from the main unit (See Section 3.2).(2) Remove the side pads from the main unit (See Section 3.3).(3) Disassemble the top cover assembly and the bottom case assembly (See Section 3.4).(4) Disconnect the LCD flexible cable from the main control board.(5) Remove the two M2L6 self-tapping screws holding the main control board from the top cover assembly.(6) Disconnect the connector between the main control board and the control panel board and then remove

the top cover assembly.


LED flexible cable

Main control board

Top cover assembly

Core

Fixing tape

Re-assembly(1) Re-assemble the main control board in the reverse order in which it was disassembled.

GL820-UM-251-9370 3-6


3.6 Replacing the Control Panel Board

Disassembly(1) Remove the input terminal unit from the main unit (See Section 3.2).(2) Remove the side pads from the main unit (See Section 3.3).(3) Disassemble the top cover assembly and the bottom case assembly (See Section 3.4).(3) Remove the main control board (See Section 3.5).(4) Remove the two M2L6 self-tapping screws holding the LCD bracket, and then detach the LCD bracket.(5) Remove the four M2L6 self-tapping screws holding the control panel board.(6) Remove the control panel board from the top cover assembly.


Top cover assembly

Control panel board


LCD bracket

Re-assembly(1) Re-assemble the control panel board in the reverse order in which it was disassembled.

GL820-UM-251-9370 3-7


3.7 Replacing the LCD and the Top coverThe LCD is supplied together with the top cover assembly.This is avoiding to get the dust between the LCD and the top cover panel.

Disassembly(1) Remove the input terminal unit from the main unit (See Section 3.2).(2) Remove the side pads from the main unit (See Section 3.3).(3) Disassemble the top cover assembly and the bottom case assembly (See Section 3.4).(3) Remove the main control board (See Section 3.5).(4) Remove the key pad from the top cover assembly.

Key pad

LCD bracket

Top cover assembly with LCD

Control panel board

Re-assembly(1) Re-assemble the LCD and the top cover assembly in the reverse order in which it was disassembled.

GL820-UM-251-9370 3-8


3.8 Replacing the AMP Board

Disassembly(1) Remove the input terminal unit from the main unit (See Section 3.2).(2) Remove the side pads from the main unit (See Section 3.3).(3) Disassemble the top cover assembly and the bottom case assembly (See Section 3.4).(4) Remove the four M2L6 self-tapping screws holding the AMP board from the bottom case assembly.(5) Detach the AMP board from the bottom case assembly.(6) Remove the two M2.6L6 binding head screws holding the terminal unit connector cover.(7) Detach the terminal unit connector cover from the AMP board.


Bottom case assembly

AMP board

Terminal unit connector cover

M2.6L6 binding head screw

Re-assembly(1) Re-assemble the AMP board in the reverse order in which it was disassembled.(2) Perform the Setup operations for the GL820 when you replace the AMP board.

GL820-UM-251-9370 4-1

4. SETUP PROCEDURES

4. SETUP PROCEDURES

4.1 Entering the System Setup Menu(1) Press the [MENU] key until the “OTHR” menu shown below appears.

(2) Press the [LEFT DOUBLE ARROW Direction] key 10 times in order to display the “Setup” menu shown below.

(3) Move the cursor to the “Mode” position using the [Direction] keys.(4) Press the [ENTER] key to display the menu from which you can execute the various Setup operations.

Setup modeSetup1 (Basic)Setup2 (Room temp.)Setup3 (RTD temp.)

(5) Select the Setup mode using the [Direction] keys, and then press the [ENTER] key.

GL820-UM-251-9370 4-2

4. SETUP PROCEDURES

(6) Move the cursor to the “Execute Setup” position as shown below.

(7) Press the [ENTER] key to start the selected Setup operation.

GL820-UM-251-9370 4-3

4. SETUP PROCEDURES

4.2 AC Line cycle SettingYou must set the AC Line cycle setting of the GL820 to the same cycle as that of your AC line before you perform the Setup operations.

How to set the AC line cycle(1) Press the [MENU] key until the "OTHR" menu shown below appears.

(2) Move the cursor to the "AC Line cycle" position using the [Direction] keys.(3) Press the [ENTER] key to display the "AC Line cycle" selection menu shown below.

(4) Select the appropriate cycle for your AC line.

GL820-UM-251-9370 4-4

4. SETUP PROCEDURES

4.3 Performing Setup1 (Voltage Input)This procedure is required when any part of the AMP board is replaced.

Preparation• Have a voltage generator on hand that can output voltage up to 50 VDC (four-digit output).• Mutually connect the ground terminals of the voltage generator and the GL820.• Set the AC Line cycle setting of the GL820 to the same cycle as that of your AC line.

Wiring connection

0.00000 V

Voltage generator

FG

GND

AC adapterConnect to CH1

Input cable

Connect both ends to GND

GL820-UM-251-9370 4-5

4. SETUP PROCEDURES

Setup procedure(1) As shown in the figure above, connect the output of the voltage generator to the GL820’s CH1 input

terminal.(2) Leave the GL820 turned on for at least 30 minutes. And leave the GL820 turned on for at least 10

minutes after wiring.(3) After entering the System Setup mode, open the Setup menu as shown below.

Specify the AMP Setup conditions as shown below.Mode :Setup1 (Basic)CH :CH 1


GL820-UM-251-9370 4-6

4. SETUP PROCEDURES

(5) Press the [ENTER] key to start the Setup1 (Basic) operation.

Message

(6) The “GND : [START]” message is displayed at the location shown above.(7) Input “0.000mV” to the input terminals of channel 1.(8) Press the [START] key and then wait until the "20 mV : [START]" message appears.

Specify the voltage generator's output voltage setting to correspond to one of the displayed voltage ranges in the following table, and then input that voltage to the GL820.

Message Input VoltageGND 0.000 mV

20 mV 20.000 mV50 mV 50.000 mV100 mV 100.000 mV200 mV 200.000 mV500 mV 500.000 mV

1 V 1.000 V2 V 2.000 V5 V 5.000 V10 V 10.000 V20 V 20.000 V50 V 50.000 V

(9) Repeat step (8) by sequentially setting the Measure parameter to 50 mV, 100 mV, 200 mV, 500 mV, 1 V, 2 V, 5 V, 10 V, 20 V and 50 V, and then inputting the corresponding voltage.

GL820-UM-251-9370 4-7

4. SETUP PROCEDURES

(10) When you have finished the Setup operation for 50 V, the "EEPROM : [ENTER]" message appears.Press the [ENTER] key to begin writing the new Setup data to the EEPROM.

Message

(11) After the setup parameters have been registered to the EEPROM, the display closes and returns to normal mode.

(12) Turn off the GL820.This completes the voltage amp setup.

GL820-UM-251-9370 4-8

4. SETUP PROCEDURES

4.4 Performing Setup2 (Room Temperature Compensation)This procedure is required when any part of the relay board is replaced.Setup the Setup 1 when the amp board was replaced before performing this procedure.

Preparation• As shown below, use (T: ø0.32 mm, K: ø0.65 mm) temperature compensation leads to connect the input

terminals to the 0˚C reference temperature device (Zero controller).• Set the AC Line cycle setting of the GL820 to the same cycle as that of your AC line.

Wiring connection

(T) compensation lead

(K) compensation lead

(T) input side

(T) output side

0˚C referencetemperature device(Zero Controller)

(K) input side

(K) output side

Input 0 V for the output side or short the + and - terminals

AC adapter

Connect the GND terminals.

Connect (T) compensation lead to the CH1, CH6, CH11 and CH16 input terminals.Connect (K) compensation lead to the CH3, CH8, CH13 and CH17 input terminals.

CAUTIONConnect each compensation copper lead to a single terminal as shown in the above diagram (parallel wiring is not permitted).

GL820-UM-251-9370 4-9

4. SETUP PROCEDURES

Setup procedure(1) As shown in the figure above, connect the inputs of the zero controller to the GL820’s input terminals.(2) Leave the GL820 turned on for at least 30 minutes. And leave the GL820 turned on for at least 10


Specify the AMP Setup conditions as shown below.Mode :Setup2 (Room temp.)Sensor :Sensor1Area :Area1CH :CH 1


GL820-UM-251-9370 4-10

4. SETUP PROCEDURES

(5) Press the [ENTER] key to start the Setup2 (Room temp.) operation.

Message

(6) The “rTemp : [START]” message is displayed at the location shown above.(7) Press the [START] key and then wait until the "EEPROM : [ENTER]" message appears.

Message

(8) Press the [ENTER] key to begin writing the new Setup data to the EEPROM.(9) After the setup parameters have been registered to the EEPROM, the display closes and returns to

normal mode.

GL820-UM-251-9370 4-11

4. SETUP PROCEDURES

(10) Re-open the Setup menu as shown below.Specify the AMP Setup conditions as shown below.Mode :Setup2 (Room temp.)Sensor :Sensor1Area :Area2CH :CH 1

(11) Repeat steps (4) to (8) for all the areas up to Area 4.(12) Turn off the GL820.This completes the Room temp. setup.

Setup flow for the Room temp.Procedure Selected area

1 Area 12 Area 23 Area 34 Area 4

GL820-UM-251-9370 4-12

4. SETUP PROCEDURES

4.5 Performing Setup3 (RTD)

Preparation• Have reference resistors to setup RTD. Reference resistors: 0 Ω (Short), 350 Ω ±0.01%, 2500 Ω ±0.01%• As shown below, use reference resistors to connect the CH20.• Set the AC Line cycle setting of the GL820 to the same cycle as that of your AC line.

Wiring connection

(+) (-) (b)

Reference resistors:(1) 0 Ω (Short)(2) 350 Ω ±0.01%(3) 2500 Ω ±0.01%

AC adapterConnect to the CH20 input terminals.

Connect to the GND

GL820-UM-251-9370 4-13

4. SETUP PROCEDURES

Setup procedure(1) As shown in the figure above, connect the reference resistor to the GL820’s input terminals.(2) Leave the GL820 turned on for at least 30 minutes. And leave the GL820 turned on for at least 10


Specify the AMP Setup conditions as shown below.Mode :Setup3 (RTD temp.)CH :CH 20


GL820-UM-251-9370 4-14

4. SETUP PROCEDURES

(5) Press the [ENTER] key to start the Setup3 (RTD temp.) operation.

Message

(6) The "0 ohm : [START]" message is displayed at the location shown above.(7) Connect the reference 0 Ω resistor to the input terminals of channel 20.(8) Press the [START] key and then wait until the "350 ohm : [START]" message appears.

Replace the reference resistor to correspond to one of the displayed resistors in the following table and then press the [START] key.

Message Reference resistor0 ohm 0 Ω

350 ohm 350 Ω2500 ohm 2500 Ω

(9) Repeat step (8) by sequentially to 350 Ω and 2500 Ω.(10) The "EEPROM : [ENTER]" message appears when the 2500 ohm setup was completed.

Message

(11) Press the [ENTER] key to begin writing the new Setup data to the EEPROM.(12) After the setup parameters have been registered to the EEPROM, the display closes and returns to

normal mode.

GL820-UM-251-9370 4-15

4. SETUP PROCEDURES

(13) Turn off the GL820.This completes the RTD temp. setup.

GL820-UM-251-9370 5-1

5. INSPECTION AND CHECK PROCEDURES


5.1 Preparations for inspections

5.1.1 AC Line Setting(1) Set the AC Line cycle setting of the GL820 to the same cycle as that of your AC line (See Section 4.2).

5.1.2 Sampling setting(1) Set the Sampling setting of the GL820 to at least 1 sec or longer.

5.1.3 Copy the condition settings fileCondition settings files :GL820ConditionVolt.CND ← Condition settings for Voltage accuracy :GL820ConditionTC.CND ← Condition settings for T and K range accuracy :GL820ConditionPT.CND ← Condition settings for PT range accuracy

(1) Copy the condition settings file to a USB memory device from the computer.

GL820-UM-251-9370 5-2


5.1.4 How to load the condition settings file to the GL820 from a USB memory device(1) Connect the USB memory device to the GL820.

(2) Press the [FILE] key to display the menu below.

(3) Move the cursor to the “Load” position using the [Direction] keys.

GL820-UM-251-9370 5-3


(4) Press the [ENTER] key to display the menu below.

(5) Move the cursor to the “File Name” position using the [Direction] keys.(6) Press the [ENTER] key to display the menu shown below.

(7) Move the cursor to the “USB1” position using the [Direction] keys.

GL820-UM-251-9370 5-4


(8) Press the [Left Arrow Direction] key to display files as shown below.

(9) Specify the condition settings file to execute the various inspection operations by using the [DOWN Arrow Direction] key or the [UP Arrow Direction] key.

(10) Press the [ENTER] key to display the menu shown below.

GL820-UM-251-9370 5-5


(11) Move the cursor to the “OK” position using the [Direction] keys.

(12) Press the [ENTER] key to display the menu below.

(13) Move the cursor to the “OK” position using the [Direction] keys.

(14) Press the [ENTER] key to load the condition settings file.

GL820-UM-251-9370 5-6


5.2 Voltage Measurement AccuracySupply the reference voltage or frequency determined for each measurement range, and then check the voltage accuracy.

Preparation• Have a voltage generator on hand that can output voltage up to 50 VDC (using four-digit output).• Mutually connect the ground terminals of the voltage generator and the GL820 prior to initiating

measurement.• Set the AC Line cycle setting of the GL820 to the same cycle as that of your AC line.• Set the Sampling setting of the GL820 to at least 1 sec or longer.

Wiring connectionSame wiring connection as Setup1. (See Setup1 procedure)

Setting procedure(1) Load the condition settings file "GL820ConditionVolt.CND" from the USB memory device.

Measurement procedure(1) Press the [MENU] key to display the menu shown below.

(2) Move the cursor to the Range position of channel 1.(3) Press the [ENTER] key to display the menu shown below, and then select the reference voltage range.

GL820-UM-251-9370 5-7


(4) Press the [DISPLAY] key until the menu shown below appears.

(5) Press the [Left DOUBLE Arrow] key to display the menu shown below.

GL820-UM-251-9370 5-8


(6) Input the reference voltage for each range according to the table below, and then check that the level of measurement is within the rating.

Voltage precision ratingsRange Input voltage Factory Rating (±0.08%) Product Rating (±0.1%)20 mV +20.000 mV +19.984 mV to +20.016 mV +19.98 mV to +20.02 mV50 mV +50.000 mV +49.96 mV to +50.04 mV +49.95 mV to +50.05 mV100 mV +100.00 mV +99.92 mV to +100.08 mV +99.9 mV to +100.1 mV200 mV +200.00 mV +199.84 mV to +200.16 mV +199.8 mV to +200.2 mV500 mV +500.00 mV +499.6 mV to +500.4 mV +499.5 mV to +500.5 mV

1 V +1.0000 V +0.9992 V to +1.0008 V +0.999 V to +1.001 V2 V +2.0000 V +1.9984 V to +2.0016 V +1.998 V to +2.002 V5 V +5.0000 V +4.996 V to +5.004 V +4.995 V to +5.005 V

10 V +10.0000 V +9.992 V to +10.008 V +9.99 V to +10.01 V20 V +20.0000V +19.984 V to +20.016 V +19.98 V to +20.02 V50 V +50.000 V +49.96 V to +50.04 V +49.95 V to +50.05 V

This value will change when the reference voltage is input from the voltage generator.

(7) Press the [START/STOP] key when the input voltage stabilizes.(8) Wait until the "Finished" message is displayed, and then display the values as shown below.

Message

Confirm that this value is within the above ratings after data has been captured.

(9) Repeat steps (1) to (8), and then confirm that each value is within the above ratings.

GL820-UM-251-9370 5-9


5.3 Temperature Accuracy

Preparation• Use (T) and (K) temperature compensation leads to connect a 0˚C reference temperature device (zero

controller) to the GL820 input terminals.• Set the AC Line cycle setting of the GL820 to the same cycle as that of your AC line.• Set the Sampling setting of the GL820 to at least 1 sec or longer.


Setting procedure(1) Load the condition settings file GL820ConditionTC.CND from the USB memory device.

Measurement procedure (temperature accuracy)(1) Short the input reference voltage signal for the 0˚C reference temperature device (zero controller)

according to the table below, then check that the level of measurement is within the rating.Input voltage precision ratings (Type T)

Temperature Input voltage Factory Rating Product Rating 0 ˚C 0.000 mV -0.8 ˚C to +0.8 ˚C -1.0 ˚C to +1.0 ˚C

Input voltage precision ratings (Type K)Temperature Input voltage Factory Rating Product Rating

0 ˚C 0.000 mV -1.0 ˚C to +1.0 ˚C -1.5 ˚C to +1.5 ˚C(2) Press the [DISPLAY] key until the menu shown below appears.

GL820-UM-251-9370 5-10



(4) Press the [START/STOP] key to measure the temperature.(5) Wait until the "Finished" message is displayed, and then display the values as shown below.

Message


(6) Check that the level of measurement is within the above rating from the CH1 to the CH10.(7) Press the [CH GROUP] key to display from the CH11 to the CH20.


GL820-UM-251-9370 5-11


5.4 RTD AccuracyPreparation• Have reference resistors to setup RTD. Reference resistors: 350 Ω ±0.01%, 2500 Ω ±0.01%• As shown below, use reference resistors to connect the CH20.• Set the AC Line cycle setting of the GL820 to the same cycle as that of your AC line.


Setting procedure(1) Load the condition settings file GL820ConditionPT.CND from the USB memory device.

Measurement procedure (RTD accuracy)

(1) Connect the reference resistor to the input terminals of channel 20.

(2) Press the [DISPLAY] key until the menu shown below appears.


GL820-UM-251-9370 5-12


(4) Press the [CH GROUP] key to display from the CH11 to the CH20.

(5) Press the [START/STOP] key to measure.

(6) Wait until the "Finished" message is displayed, and then display the values as shown below.Message

Confirm that this value is within the below ratings after data has been captured.

(7) Check that the level of measurement is within below rating.RTD precision ratings

Range Input resistorReference

TemperatureFactory Rating Product Rating

Pt100 350 Ω 715.3 ˚C +714.5 ˚C to +716.1 ˚C +714.3 ˚C to +716.3 ˚CPt1000 2500 Ω 408.8 ˚C +407.8 ˚C to +409.2 ˚C +408.0 ˚C to +409.6 ˚C

GL820-UM-251-9370 6-1

6. PARTS LISTS

6. PARTS LISTS

6.1 Recommended Parts ListNo. Part No. Part Name Description Q'ty Remarks1 795820700 Main Control Board with SD card, GL820 12 795820701 AMP Board, GL820 13 795800702 Control Panel Board 1 Same as GL8004 795800710 AC Adapter JP, with AC cable KSAH2400200T1M2 1 Japan5 795800711 AC Adapter UL, with AC cable KSAH2400200T1M2 1 UL6 795800712 AC Adapter CEE, with AC cable KSAH2400200T1M2 1 CEE7 795800713 AC Adapter BS, with AC cable KSAH2400200T1M2 1 BS8 795800714 AC Adapter CCC, with AC cable KSAH2400200T1M2 1 China

GL820-UM-251-9370 6-2

6. PARTS LISTS

6.2 Parts Lists

6.2.1 Outer CasingNo. Part No. Part Name Description Q'ty Remarks Rank1 795820703 Top Cover with LCD 1 A2 795820704 Bottom Case 1 C3 604810510 Left Side Pad 1 C4 604810520 Right Side Pad 1 C

Outer Casing

1

3

2

4

GL820-UM-251-9370 6-3

6. PARTS LISTS

6.2.2 Bottom PartsNo. Part No. Part Name Description Q'ty Remarks Rank1 795820701 AMP Board 1 A2 604810051 Cover, Connector 1 C

Bottom Parts

1

2

GL820-UM-251-9370 6-4

6. PARTS LISTS

6.2.3 Top PartsNo. Part No. Part Name Description Q'ty Remarks Rank1 795820700 Main Control Board, with SD card 1 A2 795800702 Control Panel Board 1 A3 795820703 Top Cover, with LCD 1 A4 604820020 Bracket, LCD 1 C5 604810033 Key Pad 1 C6 562500097 Core, LCD Flexible Cable E04FG270712 1 C7 690482010 Flexible Cable, LCD FC,RN8112-01 1 C

Top Parts

3

4

2

1

5

6

Fixing tape for core

7

GL820-UM-251-9370 6-5

6. PARTS LISTS

Replaceable parts for the main control boardNo. Part No. Part Name Description Q'ty Remarks Rank1 561630005 Switch, AJ76231BF SW1: Power Switch 1 A2 561550037 Connector, HEC0470-01-640 JP14: DC Input 1 A3 561500112 USB Type A Connector, XM7A-0442 J7: USB Connector 1 A4 561500082 USB Type B Connector, XM7B-0442 J8: USB Connector 1 A5 561550041 LAN Connector, TM11R-5M2-88-LP J9: LAN Connector 1 A6 562070001 Backup Battery, ML2130-TT BAT1: Backup Battery 1 A

GL820-UM-251-9370 6-6

6. PARTS LISTS

6.2.4 Bottom CaseNo. Part No. Part Name Description Q'ty Remarks Rank1 604220030 Cover, Battery 1 C2 795820704 Bottom Case 1 C

Bottom Case

2

1

6.2.5 Terminal UnitNo. Part No. Part Name Description Q'ty Remarks Rank1 795800707 Terminal Unit 1 A2 795800705 Terminal Base 1 A3 795800706 Terminal Base Plate Including 4 screws 1 A4 795800708 Terminal Base Extension Cable 1 A

21 4

3

GL820-UM-251-9370 6-7

6. PARTS LISTS

6.2.6 Standard AccessoriesNo. Part No. Part Name Description Q'ty Remarks Rank1 GL820-CDM01M CD Manual, Software 1 B

2 604829040 GL820-UM-851 Quick Start Manual 1 English B604829030 GL820-UM-801 Quick Start Manual 1 Japanese B

3 795800710 AC Adapter JP, with AC cable KSAH2400200T1M2 1 Japan A4 795800711 AC Adapter UL, with AC cable KSAH2400200T1M2 1 UL A5 795800712 AC Adapter CEE, with AC cable KSAH2400200T1M2 1 CEE A6 795800713 AC Adapter BS, with AC cable KSAH2400200T1M2 1 BS A7 795800714 AC Adapter CCC, with AC cable KSAH2400200T1M2 1 China A

GL820-UM-251-9370 7-1

7. BLOCK DIAGRAM

7. Block Diagram7.1 Main Unit Power Block & Main Control

AC

Ada

pter

AC

IN

KSA

H24

0020

0T1M

2

1. 2.

NO

TE

Seco

ndar

y ci

rcui

t

Prim

ary

circ

uit

With

exp

ande

d te

rmia

l opt

ion

Stan

dard

ISO

LATI

ON

ISO

LATI

ON

Prim

ary

circ

uit

Sign

alin

put

circ

uit

Seco

ndar

yci

rcui

t

POW

ERSW

Mai

n U

nit P

ower

Blo

ck &

Mai

n C

ontro

l

Mai

n C

ontro

lB

oard

(RN

8113

-01*

)

J203

J13

SW

J14

: Con

nect

or to

Con

nect

or

To H

umid

ity S

enso

r

J15

To B

atte

ry1

AM

P B

oard

(RN

8113

-02*

)

J301J6

KEY

Boa

rd(R

N60

62-0

3*)

J501

J401

J502

J402

YALE

Rdrao

B*)40-2606

N(R

TER

MIN

AL

Boa

rd(R

N60

62-0

5*)

304JJ201

J16

To B

atte

ry2

J205

POW

ERSW

Mai

n C

ontro

lB

oard

(RN

8113

-01*

)

J203J13

SW

J14

J15

AM

P B

oard

(RN

8113

-02*

)

J301J6

KEY

Boa

rd(R

N60

62-0

3*)

J501 J4

01

J502

J402

REL

AY

Boa

rd(R

N60

62-0

4*)

J403

J202

J16

J205

To H

umid

ity S

enso

r

To B

atte

ry1

To B

atte

ry2

TER

MIN

AL

Boa

rd(R

N60

62-0

5*)

TER

MIN

AL

BA

SEB

oard

(RN

6062

-06*

)

J501 J4

01

J502

J402

REL

AY

Boa

rd(R

N60

62-0

4*)

J403

TER

MIN

AL

Boa

rd(R

N60

62-0

5*)

TER

MIN

AL

BA

SEB

oard

(RN

6062

-06*

)

CA

,RN

6062

-02*

J603

J604

J601

J603

J604

J601

Up

to 1

0 te

rmin

al B

ase

GL820-UM-251-9370 7-2

7. BLOCK DIAGRAM

7.2 Main Control Block

BA

T1

Seco

ndar

y ci

rcui

t

Mai

n C

ontro

l Blo

ck

Mai

n C

ontro

l Boa

rdR

N81

13-0

1*

J3

J4

LCD

1

FLA

SH W

RIT

E

J5

LCD

FFC

BL

J7USB

(to F

LASH

MEM

OR

Y)

J8J9

USB

LAN

(to P

C)

J203

J13

AM

P B

oard

RN

8113

-02*

J204

Logi

c &

Ala

rm &

Pul

se &

Ext

-Trig

J2

FPG

A W

RIT

E

GL820-UM-251-9370 7-3

7. BLOCK DIAGRAM

7.3 AMP BlockA

MP

Blo

ck

J504

J501

(RN

6062

-05*

)Te

rmin

al B

oard

Sign

al In

put C

ircui

t

(RN

6062

-04*

)Te

rmin

al B

oard

Sign

al In

put C

ircui

tTo

Mai

n C

ontro

l

Sign

al In

put C

ircui

t

Sign

al In

put C

ircui

tSe

cond

ary

Circ

uit

Am

p B

oard

(RN

8113

-02*

)Si

gnal

Inpu

t Circ

uit

Sign

al In

put C

ircui

t

Sign

al In

put C

ircui

t

Sign

al In

put C

ircui

t

Sign

al In

put C

ircui

t

Sign

al In

put C

ircui

t

Sign

al In

put C

ircui

t

Sign

al In

put C

ircui

t

- 1ch

- 2ch

- 19c

h

- 20c

h

J504

+ 1c

h

+ 2c

h

+ 19

ch

+ 20

ch

J505

J502

J402

J403

J201

J401

J203J13

(RN

8113

-01*

)

b 1c

h

b 2c

h

b 19

ch

b 20

ch

GL820-UM-251-9370 7-4

7. BLOCK DIAGRAM

7.3 Details of the AMP

Det

ails

of A

MP

Sign

al In

put C

ircui

t

Sign

al In

put

Tem

pera

ture

Sen

sor

Phot

o M

OS

Rel

ay

Con

stan

t Cur

rent

1m

A

Atte

nuat

orSe

lect

or

Sele

ctor

AMP

AMP

AMP

AMP

AMP

AMP

A/D

TLP1

13

DC

±5V

DC

+5V

DC

+24V

AMP

DC/D

CAI

C166

0CS

DC/

DC

DCP

0105

05BP

-U

Isol

atin

g

Isol

atin

g

Dec

oder

+ - b + - b

Term

inal

Boa

rd(R

N60

62-0

6*)

(RN

6062

-04*

)

(RN

8113

-02*

)

Rel

ay B

oard

AM

P B

oard

Seco

ndar

y C

ircui

t

Mai

n C

ontro

l Boa

rd(R

N81

13-0

1*)

AC

Ada

ptor

Phot

ocou

pler

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