lt64x2 hpa1900

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BARNSTEAD THERMOLYNE CORPORATION

HOT PLATEOPERATION MANUAL

AND PARTS LISTSeries 64

MODELSHPA1910M

HPA1910M-26 HPA1914BHPA1915B

HPA1915B-13

LT64X2 • 7/6/98

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Safety Information .............................................................................................................................................. 3 Alert Signals ..................................................................................................................................................... 3 Warnings .......................................................................................................................................................... 3General Specifications ....................................................................................................................................... 5Introduction ........................................................................................................................................................ 6 Intended Use .................................................................................................................................................... 6Operation ........................................................................................................................................................... 7Maintenance and Servicing ................................................................................................................................ 8 Cleaning Bimetal Contact Points ...................................................................................................................... 8 To Replace Control Unit ................................................................................................................................... 8 To Replace Heater Coil .................................................................................................................................... 9 To Replace Insulator on Adjusting Shaft ........................................................................................................ 10 To Replace Cycle Light .................................................................................................................................. 10 To Replace an Element .................................................................................................................................. 11 Recalibration .................................................................................................................................................. 12Troubleshooting Guide ..................................................................................................................................... 14Exploded View and Schematics ....................................................................................................................... 15Replacement Parts List .................................................................................................................................... 16Ordering Procedures ........................................................................................................................................ 17Warranty ........................................................................................................................................................... 18

Table of Contents

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This manual contains important operating andsafety information. You must carefullyread and understand the contents of thismanual prior to the use of this equipment.

Your Thermolyne Hot Plate has been designedwith function, reliability, and safety in mind. It isyour responsibility to install it in conformancewith local electrical codes. For safe operation,please pay attention to the alert signalsthroughout the manual.

Warnings Do not immerse unit for cleaning.

As with all laboratory equipment, appropriatesafety clothing, glasses, gloves and coatsshould be worn when operating hot plates.Always use appropriate hand and eyeprotection when handling hazardous chemicals.

DO NOT remove or modify grounded powerplug. Use only properly grounded outlets toavoid shock hazard. Not rated for use inhazardous atmospheres.

Do not use in the presence of flammable orcombustible chemicals; top surface andelement can reach the “Flash PointTemperature” of many chemicals. THESE HOTPLATES ARE NOT EXPLOSION PROOF. Fireor explosion may result. Unit containscomponents which may ignite such materials.

“Caution: Hot Surface. Avoid Contact.” The hotplate will remain hot for some time after thepower is turned off.

Safety Information

Alert Signals

WarningWarnings alert you to apossibility of personal injury.

CautionCautions alert you to a possibilityof damage to the equipment.

NoteNotes alert you to pertinent factsand conditions.

Hot SurfaceHot surfaces alert you to apossibility of personal injury ifyou come in contact with asurface during use or for aperiod of time after use.

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To avoid electrical shock:

Always use a properly grounded electrical outletwith correct voltage and current handlingcapacity.

Disconnect from the power supply prior tomaintenance and servicing.

Refer to qualified personnel for service.

CautionThis unit is not recommended foruse in highly corrosiveatmospheres. Corrosive spillsand fumes may damage top andinternal components. Space unit12 inches away from combustiblematerials under any conditions.DO NOT use metal foil, metalvessels or other insulatingmaterial on top plate. The use ofthese materials will prevent thenormal dissipation of heat fromthe plate and may cause damageto the top plate.

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General Specifications

Width 6-5/8 6-5/8 6-5/8 6-5/8 6-5/8(16.8) (16.8) (16.8) (16.8) (16.8)

Height 4-3/8 4-3/8 4-3/8 4-3/8 4-3/8(11.1) (11.1) (11.1) (11.1) (11.1)

Depth 7-5/8 7-5/8 7-5/8 7-5/8 7-5/8(19.4) (19.4) (19.4) (19.4) (19.4)

Top Plate 6-1/4x6-1/4 6-1/4x6-1/4 6-1/4x6-1/4 6-1/4x6-1/4 6-1/4x6-1/4(15.9x15.9) (15.9x15.9) (15.9x15.9) (15.9x15.9) (15.9x15.9)

Weight 4-1/2 4-1/2 4-1/2 4-1/2 4-1/2(2) (2) (2) (2) (2)

Volts 240 240 100 120 120Amps 3.3 3.3 7.5 6.2 6.2Watts 750 750 750 750 750Freq. 50/60 50/60 50/60 50/60 50/60Phase 1 1 1 1 1

Maximum 371° 371° 371° 371° 371°°C (°F) (700°) (700°) (700°) (700°) (700°)

*(-26) model - supplied with European cord set.** (-13) indicates CSA model.*** indicates U.L. model.

HPA1910M HPA1910M-26* HPA1914B HPA1915B*** HPA1915B-13**

ElectricalRatings

OverallDimensionsin. (cm)

OperatingTemperature

Dimensionsin. (cm)

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Intended UseThe Model HPA1900 hot plates are generalpurpose heating devices intended for laboratoryprocedures requiring temperatures from 38°C(100°F) to 371°C (700°F). The top plate is heatedby a resistance heater embedded in a refractorymaterial. The plate is made of cast aluminum toaid in uniform surface temperature. Thetemperature of the plate is controlled by abimetallic thermostat. The case supports the topplate, and also serves to house the electricalconnections and the temperature control.

The unit consists of 1) a heated plate, and 2) anadjustable temperature control. See Figure 1 forthe overall shape and the general features of theunit.

Introduction

Figure 1

HeatingPlate

CycleLight

DialSwitch

DialPlate

Warning To avoid electrical shock,always use a properly groundedelectrical outlet of correctvoltage and current handlingcapacity “Caution: Hot Surface.Avoid Contact.” The hot platewill remain hot for some timeafter the power is turned off. Donot use in the presence offlammable or combustiblematerials; fire or explosion mayresult. This device containscomponents which may ignitesuch materials.

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Install hot plate on a sturdy surface and allowspace for ventilation. The electricalspecifications are listed on the specificationplate on the back of the hot plate. ConsultBarnstead/Thermolyne if your electrical serviceis different than those listed on the specificationplate. Prior to connecting your Type 1900 hotplate to your electrical supply, be sure the dialswitch is in the OFF position.

The power is turned ON or OFF by means ofthe dial switch. The hot plate is ON when thepointer is at or beyond the OFF mark on the dialplate.

Turn dial clockwise to set desired temperature.Dial marks indicate approximate surfacetemperature in °C. The green cycle light willilluminate when the pointer on the dial passesthe OFF mark on the dial plate. (If this does notoccur, refer to recalibration on page 12.) Whenthe temperature for a given dial setting hasbeen reached, the light will cycle OFF and ONto hold that temperature. If the cycle light is off,hot plate may still be hot. To turn OFF hot plate,turn dial switch to the fully counterclockwiseposition.

Operation

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Cleaning Bimetal Contact PointsBimetal control contact points may need cleaningafter severe or extended use. To clean:

a) Disconnect hot plate from power supply.

b) Turn hot plate upside down and removeperforated cover by removing fourscrews.

c) The contact points are accessible nowand may be cleaned with fine sandpaperor a contact file.

d) If contact points are severely pitted orburned, replacement is suggested at thistime. (Refer to replacement of controlunit.)

e) Replace bottom perforated cover andsecure with four screws.

f) Turn hot plate upright and reconnect topower supply.

To Replace Control Unita) Disconnect hot plate from power supply.

b) Turn hot plate upside down and removeperforated cover. (Note placement andconnection of wires to control unit.)

c) Remove stop collar by loosening setscrew and remove the adjusting shaftfrom case.

d) Disconnect heater coil from controlcontact stud and disconnect whiteinsulated wire from control unit.

Maintenance and Servicing

WarningRefer servicing to qualified per-sonnel. “Caution: Hot Surface.Avoid Contact.” The hot plate willremain hot for some time afterthe power is turned off.Disconnect from the powersupply prior to maintenance andservicing.

NotePerform only maintenancedescribed in this manual.Contact an authorized dealer orour factory for parts andassistance.

NoteDo not use emery paper to cleancontact points.

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e) Remove two screws holding control ontop plate and remove control unit.

f) Install new control unit and secure withtwo screws.

g) Reinsert adjusting shaft and stopcollar. (Recalibration is necessary—refer to recalibration instruction onpage 12.)

h) Reconnect heater coil to controlcontact stud and reconnect whiteinsulated wire to terminal post. Spaceheater coil approx. 1/8" from bimetalstrip.

i) Replace perforated cover.

j) Turn hot plate upright and reconnect topower supply.

To Replace Heater Coila) Disconnect hot plate from power

supply.

b) Turn hot plate upside down andremove perforated cover.

c) Remove nut and washer from contactstud, then remove one end of heatercoil.

d) Remove remaining nut holding heatercoil and remove heater coil.

e) Install new heater coil and secure withtwo nuts. Space approx. 1/8" frombimetal strip.

MAINTENANCE AND SERVICING

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f) Replace perforated cover.

g) Turn hot plate upright and reconnect topower supply.

To Replace Insulator onAdjusting Shaft

a) Disconnect hot plate from power supply.

b) Turn hot plate upside down and removeperforated cover.

c) Loosen set screw on stop collar andscrew adjusting shaft out to removeinsulator.

d) Insert new insulator and screw the shaftin part way. (Recalibration isnecessary—refer to recalibrationinstructions on page 12.)

e) Replace perforated cover.

f) Turn hot plate upright and reconnect topower supply.

To Replace Cycle Lighta) Disconnect hot plate from power supply.

b) Turn upside down and removeperforated cover. (Note placement andconnection of wires from cycle light.)

c) Disconnect two leads from cycle light.


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d) Push in two clips on cycle light andremove cycle light by pulling it out fromthe front.

e) Insert new cycle light through the frontand reconnect leads to the properterminals.

f) Replace perforated cover.

g) Turn hot plate upright and reconnect topower supply.

To Replace an Elementa) Disconnect hot plate from power

supply.

b) Turn hot plate upside down andremove perforated cover.

c) Remove stop collar by loosening setscrew and remove the adjusting shaft.

d) Disconnect the necessary wires toenable the case section to beremoved. Identify or mark wiresdisconnected to ensure properplacement and connection whenreinstalling.

e) Remove case section from heatingplate.

f) Slide two metal plates off the elementlead wires with the insulators.

g) Remove the control unit and theremaining plate covering element.


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h) Remove the defective element andinstall the new element.

i) Thread the leads through the bottommetal plate and secure this plate byfastening control unit on top of it. (Referto exploded view for placement ofinsulators, washers and nuts.)

j) Thread the leads through the middleplate and place over bottom plate.

k) Thread the leads through the remainingmetal plate and place over middle plate.

l) Place case section over the metal platesand secure these plates with fourscrews.

m) Reconnect wires disconnected in Stepd.

n) Reinsert adjusting shaft and stop collar.(Recalibration is necessary— refer torecalibration instructions.)

o) Replace perforated cover.

p) Turn hot plate upright and reconnect topower supply.

Recalibration:a) Disconnect hot plate from power supply.

b) Turn hot plate upside down and removeperforated cover.

c) Remove the knob from the adjustingshaft by removing set screw.

NoteRecalibration may be neededfor the control unit due tocontact wear, or because ofother repairs to the hot plate.


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d) Turn the shaft until the contacts justclose and slide knob over with thepointer in line with the FIRST mark onthe dial plate.

e) Tighten the knob to the shaft withabout 3/16" between skirt of the knoband the dial plate.

f) Turn the knob counterclockwise to theOFF mark on the dial and set the stopcollar on the shaft with the set screwagainst the stop pin with about 1/4"between the collar and the controlbracket.

g) Tighten set screw on stop collar andcheck for free rotation of the controlshaft between stops.

h) Replace bottom perforated cover.

i) Turn hot plate upright and reconnect topower supply.


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The Troubleshooting Guide section is intended to aid in defining and correcting possibleservice problems. When using the chart, select the problem category that resembles themalfunction. Then proceed to the possible causes category and take necessary correctiveaction.

Problem Possible Cause Corrective Action

The cycle light does Hot plate not connected to Check hot plate connections tonot illuminate. power supply. power source.

Cycle light burned out. Replace cycle light.

Hot plate does not heat. No power. Check power source and fuse.

Defective electrical hookup. Repair electrical hookup.

Burned out heating element. Replace defective element.

Burned out heater coil on Replace heater coil.control unit.

Hot plate does not hold Control out of calibration. Refer to calibrationtemperature. instructions on page 12.

Troubleshooting

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Figure 2: Exploded View and Schematics Wiring Diagram (HPA1900’s)

Element

Capacitor

PowerLine

(all voltages)

HeaterCoil Control

PilotLightGNO

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Hot Plate, Series 64Model Numbers: HPA1914B, HPA1915B, HPA1915B-13, HPA1910M, HPA1910M-26

Ref. Part No. DescriptionNo.1 PT27X1 Plate, Aluminum top2 EL27X1 Element for HPA1915B, 120V; HPA1915-13, 120V CSA

EL27X2 Element for HPA1910M, 240V; HPA1910M-26, 240VEL64X1 Element for HPA1914B, 100V

3 CN19X3 Control4 SF25X1 Shaft, Control Adjustment5 CR226X1 Cord Set for HPA1915B, 120V; HPA1914B, 100V; HPA1915B-13, 120V CSA

CR226X2 Cord Set for HPA1910M-26, 240VCR242X1 Cord Set for HPA1910M,240V

6 KBX29 Knob7 PL64X1A Pilot/Cycle Light for HPA1914B, 100V; HPA1915B, 120V; HPA1915B-13, 120V CSA

PL64X2A Pilot/Cycle Light for HPA1910M, 240V; HPA1910M-26, 240V8 HT19X1 Heater Coil for HPA1914B, 100V; HPA1915B, 120 V; HPA1915B-13, 120V CSA

HT19X2 Heater Coil for HPA1910M, 240V; HPA1910M-26, 240V9 JSX8 Insulator for adjusting shaft

Replacement Parts List

WarningRefer servicing to qualifiedpersonnel. Disconnect from thepower supply prior tomaintenance and servicing.

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Ordering Procedures

Please refer to the Specification Plate for the complete model number, serial number, andseries number when requesting service, replacement parts or in any correspondenceconcerning this unit.

All parts listed herein may be ordered from the Barnstead Thermolyne dealer from whomyou purchased this unit or can be obtained promptly from the factory. When service orreplacement parts are needed we ask that you check first with your dealer. If the dealercannot handle your request, then contact our Customer Service Department at319-556-2241 or 800-553-0039.

Prior to returning any materials to Barnstead Thermolyne Corp. , please contact ourCustomer Service Department for a “Return Goods Authorization” number (RGA). MaterialReturned without an RGA number will be returned.

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Barnstead|Thermolyne Corporation warrants that if a product manufactured byBarnstead|Thermolyne and sold by it within the continental United States or Canadaproves to be defective in material or construction, it will provide you, without charge, for aperiod of ninety (90) days, the labor, and a period of one (1) year, the parts, necessary toremedy any such defect. Outside the continental United States and Canada, the warrantyprovides, for one (1) year, the parts necessary to remedy any such defect. The warrantyperiod shall commence either six (6) months following the date the product is sold byBarnstead|Thermolyne or on the date it is purchased by the original retail consumer,whichever date occurs first.

All warranty inspections and repairs must be performed by and parts obtained from anauthorized Barnstead|Thermolyne dealer or Barnstead|Thermolyne (at its owndiscretion). Heating elements, however, because of their susceptibility to overheating andcontamination, must be returned to our factory, and if, upon inspection, it is concluded thatfailure is not due to excessive high temperature or contamination, warranty replacement willbe provided by Barnstead|Thermolyne . The name of the authorizedBarnstead|Thermolyne dealer nearest you may be obtained by calling 1-800-446-6060(319-556-2241) or writing to:

Barnstead|ThermolyneP.O. Box 797

2555 Kerper BoulevardDubuque, IA 52004-0797

USAFAX: (319) 589-0516

E-MAIL ADDRESS: [email protected]

Barnstead|Thermolyne’s sole obligation with respect to its product shall be to repair or (atits own discretion) replace the product. Under no circumstances shall it be liable forincidental or consequential damage.

THE WARRANTY STATED HEREIN IS THE SOLE WARRANTY APPLICABLE TOBarnstead|Thermolyne PRODUCTS. Barnstead|Thermolyne EXPRESSLY DISCLAIMSANY AND ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDINGWARRANTIES OF MERCHANTABILITY OR FITNESS FOR USE.

One Year Limited Warranty

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9001ISOREGISTERED

Barnstead|Thermolyne2555 Kerper Blvd.P.O. Box 797Dubuque, IA 52004-2241Phone: 319-556-2241 800-553-0039Fax: 319-589-0516E-Mail Address: [email protected]

lt64x2 hpa1900

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