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5624

Platinum Resistance Thermometer

User’s Guide

Rev. 6B0902

Hart Scientific

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Summary of Contents for 5624

Page 1: ...5624 Platinum Resistance Thermometer User s Guide Rev 6B0902 Hart Scientific ...

Page 2: ...ientific Division 799 E Utah Valley Drive American Fork UT 84003 9775 USA Phone 1 801 763 1600 Telefax 1 801 763 1010 E mail support hartscientific com www hartscientific com Subject to change without notice Copyright 2005 Printed in USA ...

Page 3: ... 8 2 4 Recalibration 8 3 Specifications and Warranty 9 3 1 Specifications 9 3 2 Construction 9 3 3 Electrical Circuit 9 3 4 Warranty 10 4 Installation 13 4 1 Environmental Issues 13 4 2 Mounting 13 4 3 Lead Wire Identification 13 5 PRT Care and Handling Guidelines 15 5 1 PRT Care 15 5 2 PRT Handling Guidelines 15 6 Operation 17 6 1 General 17 6 2 Comparison Calibration of Other Instruments 17 6 3 ...

Page 4: ...7 Accessories 19 7 1 Case Options 19 7 2 PRT Termination 19 8 Troubleshooting 21 8 1 Troubleshooting 21 ii ...

Page 5: ...d Tables Table 1 International Electrical Symbols 1 Figure 1 Hart Model 5624 Platinum Resistance Thermometers 7 Figure 2 Standard Dimensions 10 Figure 3 PRT Schematic 13 Figure 4 Probe Termination Examples 19 iii ...

Page 6: ...the instrument or in this manual Symbol Description AC Alternating Current AC DC Battery CE Complies with European Union Directives DC Double Insulated Electric Shock Fuse PE Ground Hot Surface Burn Hazard Read the User s Manual Important Information Off On 1 1 Before You Start Symbols Used Table 1 International Electrical Symbols ...

Page 7: ...and actions that may damage the in strument being used 1 2 1 WARNINGS To avoid personal injury follow these guidelines DO NOT use this instrument to measure the temperature of any hazardous live component DO NOT use this unit for any application other than calibration work DO NOT use this unit in environments other than those listed in the user s manual Use of this instrument at high temperatures ...

Page 8: ... and verify that the probe s co efficients have been correctly entered into the readout 2 Properly prepare a triple point of water cell TPW or ice bath Contact Hart Customer Service if unsure how to do this A triple of water cell is preferred Ice baths should use distilled water and crushed ice in a Dewar flask or thermos bottle The ratio of ice to water should be such that the mixture is firm aft...

Page 9: ...e Centers Please contact one of the following authorized Service Centers to coordinate service on your Hart product Fluke Corporation Hart Scientific Division 799 E Utah Valley Drive American Fork UT 84003 9775 USA Phone 1 801 763 1600 Telefax 1 801 763 1010 E mail support hartscientific com Fluke Nederland B V Customer Support Services Science Park Eindhoven 5108 5692 EC Son NETHERLANDS Phone 31 ...

Page 10: ...exandra Terrace 03 16 The Comtech Lobby D 118502 SINGAPORE Phone 65 6799 5588 Telefax 65 6799 5588 E mail antng singa fluke com When contacting these Service Centers for support please have the following information available Model Number Serial Number Complete description of the problem 5 1 Before You Start Authorized Service Centers ...

Page 11: ... at the appropriate temperatures and precisely tested for stability The sensing element is fabri cated using high purity platinum wire wound in a strain free design on a spe cially designed support The 1 4 inch O D Alumina sheath is sealed with a specially mixed gas and fit with a terminal box handle and strain relieved con nection to the four wire cable Gold plated spade lugs terminate the wires ...

Page 12: ... company Quality Assurance QA requirements Normally a PRT is recalibrated recalibrated at least annually A shorter calibration cycle can be re quired to meet QA requirements Unless the PRT is used only over a limited range calibration over the full range of the PRT 0 1 C to 961 78 C is recom mended For information on recalibrating your 5624 contact your Hart Scien tific Authorized Service Center s...

Page 13: ...t 1mA Mechanical Size O D 1 4 inch 6 35 mm Sheath Material Alumina Length 20 inches 508 mm Sensor Length 25 mm Capsule Length 30 mm 3 2 Construction The 5624 PRT covers the range from 0 C to 1000 C The sensor elements are crafted using high purity platinum wire wound in a strain free design on a spe cially designed support See Figure 2 on page 10 for description and dimensions 3 3 Electrical Circu...

Page 14: ...art within the warranty period and is determined upon examination by Hart to be defective If Hart determines that the defect or malfunction has been caused by misuse alteration abuse or abnormal condi tions or operation or handling Hart will repair the product and bill the pur chaser for the reasonable cost of repair To exercise this warranty the purchaser must forward the product after calling or...

Page 15: ...ANY SPECIAL INDIRECT INCIDENTAL OR CONSEQUENTIAL DAM AGES OR LOSS WHETHER IN CONTRACT TORT OR OTHERWISE 11 3 Specifications and Warranty Warranty ...

Page 16: ...RT insertion clamps should be used to ensure the handle and cable are not immersed Do not screw the clamps too tight Over tightening will damage the sheath If metal comparison blocks are used in the bath maintain a close fit between the thermometer sheath and the well in the com parison block However allow for the thermal expansion of the thermometer sheath when determining block well tolerances 4...

Page 17: ...ature The PRT can be safely removed from an instrument at 600 C or less and cooled to room temperature without con cern for the cooling rate If the PRT is removed from instrument above 600 C place the PRT in an annealing furnace for one hour DO anneal the thermometer after shipment Shipping the thermometer can cause mechanical shocks that effect the accuracy of the thermometer Therefore if possibl...

Page 18: ...physical shock or vibration DON T use pliers or other devices to squeeze the sheath This action can permanently damage the PRT DON T subject the thermometer to temperatures above the highest speci fied operating temperature DON T expose the thermometer s handle or cables to extreme tempera tures The temperature limits of the handle are 20 C to 200 C DON T submerge the handle or cable in liquids DO...

Page 19: ...alibrated 6 3 Immersion Requirements Stem effect can cause measurement errors for any thermometer not immersed in the fluid at least 152 mm 6 inches This error is due to heat lost or gained by the sensing element through the thermometer stem In addition heat losses occur due to radiation losses from the sensing element to the housing The immersion depth for standards is dependent on several factor...

Page 20: ...t instruments can be a source of thermal EMF The thermal EMF is caused by a difference in tempera ture between two connections If the two connections are the same temperature there will be little or no thermal EMF effects However if there is a substantial temperature difference between connections the thermal EMF effects will be significant Therefore cover or insulate any exposed bridge or galvano...

Page 21: ...rotective Case 7 2 PRT Termination The 5624 PRT can be terminated in three ways Figure 4 depending on the user s requirements Gold Plated Spade Lug Bare Wire 5 Pin Din Connector 19 7 Accessories Case Options Bare Wire customer option Spade Lug standard 5 Pin DIN customer option 1 2 4 5 3 Figure 4 Probe Termination Examples ...

Page 22: ...s not stabilize contact a Hart Scientific Autho rized Service Center see Section 1 4 Oxidation of the platinum sensor may occur after prolonged use be tween 200 450 C This oxidation will demonstrate itself by an in crease in Rtp of less than 0 1 C To reduce the effects of oxidation anneal the PRT at 600 661 C for 4 hours Measure the Rtp again Repeat the annealing Rtp measurement cycle several time...

Page 23: ... there may be a short in the sensor Contact an Autho rized Service Center see Section 1 4 If the resistance of the PRT is only 1 or 2 ohms there may be a short in the four lead wires Contact a Hart Scientific Authorized Service Center see Section 1 4 If the PRT is open the resistance will be Out of Limits or in the kilo ohm or mega ohm range Contact an Authorized Service Center see Section 1 4 562...

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