Fluke 5623A User's Manual
Contents
1. Hart Scientific 5623A Platinum Resistance Thermometer User s Guide Rev 5A1101 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 www hartscientific com Subject to change without notice Copyright 2004 Printed in USA Rev 5A1101 Table of Contents 1 NI Symbols Used hy Pd Hea Ree ea eee ee 1 12 Safety Information 2 2 V2 2 COUHONS coat 4 EE eae ea we ee eee eee 2 1 3 Hart Scientific Authorized Service Centers 2 introduction s amp s x6 ew Ree en eR aR RRR RRO 2 1 General 2 2 Recalibration 3 Specifications and Warranty 2 2 ee ee ee 7 3 1 Specifications 3 2 203 2 So act as ew Sh a ates Be ak oe dk ck wate hae 7 4 4 1 Lead Wire Identification 5 PRT Care and Handling Guidelines 1 ne ee 5 2 11 6 Operation lt cs cas ce taste eb es ee neser 61 13 6 2 1 13 6 32. 13 15 haw 15 Figures Figure 1 PRT Schematic Tables Table 1 International Electrical Symbols Table 2 Specifications aas aww ee eee E Ghent 5623A 1 1 1 Before You Start Before You Start Symbols Used Table 1 lists the International Electrical Symbols Some or all of these symbols may be used on the instrument or in this manual Table 1 International Electrical Symbols Symbol Description No AC Alternating Current 4 AC DC Battery A MAN O gt gt Oi eE 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 Before You Start 1 2 1 2 1 1 2 2 Symbol Description Canadian Standards Association US OVERVOLTAGE Installation CATEGORY 11 Pollution Degree 2 per IEC1010 1 refers to the level of Impulse Withstand Voltage protection provided Equipment of OVERVOLTAGE CATE GORY II is energy consuming equipment to be supplied from the fixed installation Exam ples include household office and laboratory appliances C TIC Australian EMC Mark CAT I Safety Information Use this instrument only as specified in this manual Otherwise the protection provided by the instrument
3. 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 31 402 675300 Telefax 31 402 675321 E mail ServiceDesk fluke nl Fluke Int l Corporation Service Center Instrimpex Room 2301 Sciteck Tower 22 Jianguomenwai Dajie Chao Yang District Beijing 100004 PRC CHINA Phone 86 10 6 5 12 3436 Telefax 86 10 6 5 12 3437 E mail xingye han fluke com cn 1 Before You Start Fluke South East Asia Pte Ltd Fluke ASEAN Regional Office Service Center 83 Clemenceau Avenue 15 15 06 Ue Square 239920 SINGAPORE Phone 65 737 2922 Telefax 65 737 5155 E mail antng singa fluke com When contacting these Service Centers for support please have the following information available e Model Number e Serial Number e Complete description of the problem 4 Hart Scientific 5623A 2 1 2 2 2 Introduction Introduction General The Platinum Resistance Thermometers PRT model 5623A is designed to be a secondary standard interpolating instrument converting temperature to resis tance The 5623A assembly design allows for exposure to very cold tempera ture 200 C and is an ideal reference for verification monitoring or calibrating control sensors in located in freezers or incubators The 5623A may also be used as a temperature
4. standard for calibration of industrial sensors The PRT is used with a readout device to detect temperature changes or actual tem perature The 5623A covers the range from 200 C to 156 C Standard length is 6 inches Custom lengths are available on request Recalibration The recalibration of the 5623A PRT should be scheduled according to the user s company Quality Assurance requirements Normally a PRT is recalibrated annually Unless the PRT is used only over a limited range calibra tion over the full range of the PRT 200 C to 156 C is recommended For in formation on recalibrating your 5623A contact an Authorized Hart Scientific Service Center for an RMA number and current pricing see Section 1 3 Depending on the user s Quality Assurance requirements the PRT drift should be checked periodically at the Triple Point of Water TPW Section 7 Trouble shooting provides information on drift with respect to mechanical shock and oxidation 5623A 3 1 3 2 3 Specifications and Warranty Specifications and Warranty Specifications See Table 2 Table 2 Specifications Temperature Range 200 C to 156 C Entire Assembly Range 200 C to 156 C Accuracy Includes calibration uncertainty and short term stability 0 05 C full range Long term Drift C lt 0 01 at 0 C per year when used periodically at 200 Hysteresis C lt 0 01 Tempera
5. Scientific 5623A 6 1 6 2 6 3 6 Operation Operation General For best results be familiar with the operation of the heat source and the read out instrument Be sure to follow the manufacturer s instructions for the read out instrument and the heat source Immersion Requirements Stem effect can cause measurement errors for any thermometer not immersed in the fluid at least 114 mm 4 5 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 factors including accuracy requirements and type of liquid Therefore we recommend a 114 mm 4 5 inches minimum immersion depth However remember the handle limita tions The handle is designed to be immersed The temperature limits of the handle are 200 C to 156 C Temperatures outside these limits can damage the handle and the probe Convection of heat from the heat source must be kept within the handle limits The exact immersion depth required can be determined by performing a gradi ent test taking measurements approximately every 1 27 cm 5 inches until there is a significant difference in readings Allow the thermometer to stabilize at each new depth Plot the results to see the stem effect Thermal EMF Two factors contribute to thermal EMF chemical consistency and physic
6. al con sistency Variations in chemical structure due to impurities can contribute to thermal EMF Also discrepancies in crystal structure can contribute to thermal EMF These factors are minimized by annealing the full length of wire before construction of the PRT Likewise connection to extension lead wires and readout 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 galvanometer terminals to lessen the source of error The effects of thermal EMF can be can celed by using an AC bridge or a DC bridge with reversible current 7 Troubleshooting 7 Troubleshooting 7 1 Troubleshooting In the event that the probe appears to function abnormally this section may be of use in solving the problem Several possible problem conditions are de scribed along with likely causes and solutions If a problem arises please read this section carefully and attempt to understand and solve the problem If the probe seems faulty or the problem cannot otherwise be solved contact an Au thorized Hart Scientific Service Center see Section 1 3 for assistance Be sure to have the model number and serial number of your p
7. case that can be purchased from Hart Scientific The handle is designed to be immersed PRT Handling Guidelines DO keep the thermometer as clean as possible DO immerse the thermometer in the appropriate liquid for the tempera ture range If a dry block is used the well diameter should allow the PRT to comfortably slip in and out without excess movement For best results immerse the thermometer as deep as possible to avoid stem effect the temperature error caused by the conduction of heat away from the sen sor DO allow sufficient time for the thermometer to stabilize before making measurements This allows for the best accuracy DO use the correct drive current with the thermometer to prevent error in temperature or resistance Hart Scientific recommends 1mA DO use the protective shipping box provided or other protection when the thermometer is not in use DO NOT subject the thermometer to any physical shock or vibration DO NOT use pliers or other devices to squeeze the sheath This action can permanently damage the PRT DO NOT subject the thermometer to temperatures above the highest specified operating temperature DO NOT expose the thermometer s handle or cables to extreme tempera tures The temperature limits of the handle are 200 C to 156 C 5 PRT and Handling Guidelines e DO NOT screw a clamp down so tight that it dents the sheath This can permanently damage the PRT 12 Hart
8. ice Center assumes NO risk for in transit damage THE FOREGOING WARRANTY IS PURCHASER S SOLE AND EXCLU SIVE REMEDY AND IS IN LIEU OF ALL OTHER WARRANTIES EX PRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OR MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE OR USE HART SHALL NOT BE LIABLE FOR ANY SPECIAL INDIRECT INCIDENTAL OR CONSEQUENTIAL DAM AGES OR LOSS WHETHER IN CONTRACT TORT OR OTHERWISE Hart Scientific 5623A 4 Installation 4 Installation 4 1 Lead Wire Identification The 5623A PRT is equipped with a four wire cable see Figure 1 Four lead wires are used to cancel lead wire resistance For best results the readout de vice should be equipped to handle four terminal resistors White Red White Red Figure 1 PRT Schematic The lead wires are two different colors Lead wire pairs attached to each end of the sensor are identified by red and white insulation 5623A 5 1 5 2 5 PRT Care and Handling Guidelines PRT Care and Handling Guidelines PRT Care CAUTION READ THIS SECTION BEFORE REMOVING THE PRT FROM THE SHIPPING BOX OR CASE Care must be taken in handling the PRT to maintain calibration accuracy Care should still be used when handling the PRT even though the Inconel sheath is durable and provides good protection for the sensor Correct handling of the PRT will prolong the life expectancy When not in use the PRT should be stored in an optional protective
9. may be impaired The following definitions apply to the terms Warning and Caution Warning identifies conditions and actions that may pose hazards to the user Caution identifies conditions and actions that may damage the instrument be ing used A Warnings To avoid personal injury follow these guidelines e NOT use this instrument to measure the temperature of any hazard ous live component e Use of this instrument at high temperatures for extended periods of time can cause the handle to become hot e Follow all safety guidelines listed in the user s manual e Calibration Equipment should only be used by Trained Personnel A Cautions To avoid possible damage to the instrument follow these guidelines e DO NOT drop or bang the probe in any way This will cause damage to the probe internally and affect its calibration e Read Section 5 entitled PRT Care and Handling Guidelines before re moving the PRT from the shipping box Incorrect handling can damage the PRT and void the warranty Hart Scientific 5623A 1 3 1 Before You Start e Keep the shipping container in case it is necessary to ship the PRT Incor rect packaging of the PRT for shipment can cause irreparable damage Hart Scientific Authorized Service Centers Please contact one of the following authorized Service Centers to coordinate service on your Hart product Hart Scientific Inc 799 E Utah Valley Drive
10. our lead wires Contact an Authorized Hart Scientific Service Center see Section 1 3 e If the PRT is open the resistance will be Out of Limits or in the kilo ohm or mega ohm range Contact an Authorized Hart Scientific Ser vice Center see Section 1 3 5623A 15
11. robe available Problem Causes and Solutions Data changes greater than 0 1 C Mechanical shock can cause temperature errors as great as 0 5 C If this are observed is observed first measure and record Ry Data changes less than 0 1 C e Slight mechanical shock can cause temperature errors less than 0 1 C Data unstable e If the data is unstable at the Triple Point of Water TPW check the con nector If the connector is correct contact an Authorized Hart Scientific Service Center see Section 1 3 The PRT may be damaged e Ifthe data is unstable at high temperatures it may be due to electrical noise in the system Reduce the temperature and observe the data If it is stable electrical noise is interfering with the measurements at high temperatures Check the grounding of the readout device and the heat source A faulty ground on either device could interfere with high tem perature measurements A ground wire attached to the metal sheath of the PRT may help reduce electrical noise interference Temperature readout different than e Measure the PRT resistance at TPW expected e g the heat source is set at 150 C the PRT measures 125 C If the resistance of the PRT is less than the rated resistance e g 70 there may be a short in the sensor Contact an Authorized Hart Scientific Service Center see Section 1 3 e If the resistance of the PRT is only a few ohms there may a short in the f
12. ture Coefficient 0 003925 ohms ohms C Size 0 D 0 25 6 35 mm Sheath Length 6 152 4 mm Sheath Material Inconel 600 Cable length 20 ft 609 6 cm Lead Wires 22 AWG Teflon insulated cable 4 wire Warranty Hart Scientific Inc Hart warrants this product to be free from defects in ma terial and workmanship under normal use and service for a period as stated in our current product catalog from the date of shipment This warranty extends only to the original purchaser and shall not apply to any product which in Hart s sole opinion has been subject to misuse alteration abuse or abnormal conditions of operation or handling Software is warranted to operate in accordance with its programmed instruc tions on appropriate Hart products It is not warranted to be error free Hart s obligation under this warranty is limited to repair or replacement of a product which is returned to Hart 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 3 Specifications and Warranty To exercise this warranty the purchaser must forward the product after calling or writing an Authorized Hart Scientific Service Center see Section 1 3 on page 3 for authorization The Serv
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