Fluke 5624 User Manual
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Fluke 5624 User Manual

Fluke 5624 User Manual

Platinum resistance thermometer
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Hart Scientific
5624
Platinum Resistance Thermometer
User's Guide
Rev. 6B0902

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Summary of Contents for Fluke 5624

  • Page 1 Hart Scientific 5624 Platinum Resistance Thermometer User’s Guide Rev. 6B0902...
  • Page 2 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 © 2005 • Printed in USA Rev. 6B0902...

  • Page 3: Table Of Contents

    Table of Contents 1 Before You Start ......1 Symbols Used ......1 Safety Information .
  • Page 4 7 Accessories ......19 Case Options ......19 PRT Termination .
  • Page 5 International Electrical Symbols ..... 1 Figure 1 Hart Model 5624 Platinum Resistance Thermometers ..7 Figure 2 Standard Dimensions.

  • Page 6: Before You Start

    1 Before You Start Symbols Used 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 AC (Alternating Current) AC-DC...

  • Page 7: Safety Information

    5624 Platinum Resistance Thermometer User’s Guide Symbol Description Canadian Standards Association OVERVOLTAGE (Installation) CATEGORY II, Pollution Degree 2 per IEC1010-1 re- fers to the level of Impulse Withstand Voltage protection provided. Equipment of OVERVOLTAGE CATEGORY II is energy-consuming equipment to be supplied from the fixed installation.

  • Page 8: Verifying Probe Accuracy

    1 Before You Start Verifying Probe Accuracy 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. • For sheath longevity, insert the PRT at 500°C and ramp to higher temper- atures.

  • Page 9: Authorized Service Centers

    5624 Platinum Resistance Thermometer User’s Guide Hart recommends that a probe be periodically checked against a standard such as a triple point of water cell (or well-constructed ice bath if an ITS-90 fixed-point standard is not available). The verification interval depends on how the probe is handled, how and how much it is used, and your documented expe- rience with it.
  • Page 10 1 Before You Start Authorized Service Centers Telefax: +86-10-6-512-3437 E-mail: xingye.han@fluke.com.cn Fluke South East Asia Pte Ltd. Fluke ASEAN Regional Office Service Center 60 Alexandra Terrace #03-16 The Comtech (Lobby D) 118502 SINGAPORE Phone: +65 6799-5588 Telefax: +65 6799-5588 E-mail: antng@singa.fluke.com...

  • Page 11: Introduction

    Gold plated spade lugs terminate the wires. Application Hart 5624 thermometer is classified as a secondary standard. A secondary stan- dard is defined in terms of transfer of the ITS-90 from a standards laboratory to a customer’s laboratory.

  • Page 12: Calibration

    PRT is calibrated in Hart Scientific’s calibration laboratory and provided with a NIST traceable “Report of Calibration”. At the time of purchase, the 5624 is calibrated from the Triple Point of Water to the Silver Point (0.1°C to 961.78°C) at specified ITS-90 fixed points. Gener- ally, a secondary PRT is calibrated by comparison method.

  • Page 13: Specifications And Warranty

    30 mm 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.

  • Page 14: Warranty

    Figure 2 Standard Dimensions Warranty Fluke Corporation, Hart Scientific Division (Hart) warrants this product to be free from defects in material and workmanship under normal use and service for a period as stated in our current product catalog from the date of shipment.
  • Page 15 3 Specifications and Warranty Warranty ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAM- AGES OR LOSS WHETHER IN CONTRACT, TORT, OR OTHERWISE.

  • Page 16: Installation

    Lead Wire Identification The 5624 PRT is equipped with a four-wire cable. Four lead wires are used to cancel lead wire resistance. For best results, the readout device should be equipped to handle four-terminal resistors.

  • Page 17: Prt Care And Handling Guidelines

    CAUTION: READ THIS SECTION BEFORE REMOVING THE PRT FROM THE SHIPPING BOX OR CASE The 5624 Platinum Resistance Thermometer (PRT) is a delicate instrument. Care must be taken in handling the PRT to maintain calibration accuracy. The stress free design of the PRT sensor reduces the effects of mechanical shock. In addition, contamination problems of the sensor at high temperature have been eliminated.
  • Page 18 5624 Platinum Resistance Thermometer User’s Guide • DO use the correct drive current with the thermometer to prevent error in temperature or resistance. Hart Scientific recommends 1mA. • DO anneal the thermometer at 600 to 661°C for 4 hours if it becomes oxi- dized.

  • Page 19: Operation

    6 Operation General 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. Comparison Calibration of Other Instruments The uniformity and stability of the heat source and the degree of accuracy re- quired determine the number of temperature measurements necessary.

  • Page 20: Thermal Emf

    5624 Platinum Resistance Thermometer User’s Guide Thermal EMF Two factors contribute to thermal EMF, chemical consistency and physical con- sistency. Variations in chemical structure due to impurities can contribute to thermal EMF. Also discrepancies in crystal structure can contribute to thermal EMF.

  • Page 21: Accessories

    Case Options Accessories Case Options The 5624 PRT comes in a rigid case appropriate for the length of the probe. • Model 2609 PRT Protective Case PRT Termination The 5624 PRT can be terminated in three ways (Figure 4) depending on the user’s requirements:...

  • Page 22: Troubleshooting

    8 Troubleshooting Troubleshooting Troubleshooting 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.
  • Page 23 If the resistance of the PRT is less than the rated resistance, e.g. 7Ω measures 275°C. for the 5624, 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.

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