Related Manuals for Fluke 5626/5628
Summary of Contents for Fluke 5626/5628
- Page 1 Hart Scientific 5626/5628 Platinum Resistance Thermometer User’s Guide Rev. 532801...
- Page 2 Fluke Hart Scientific • 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. 532801...
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Page 3: Table Of Contents
Table of Contents 1 Before You Start ..... . 1 Symbols Used ......1 Safety Information . - Page 4 8 Troubleshooting ..... 17 Case Options ......15 PRT Termination .
- Page 5 Figures Figure 1 Hart Model 5626 and 5628 Platinum Resistance Thermometers..5 Figure 2 Standard Dimensions ......7 Figure 3 PRT Schematic .
- Page 6 Tables Table 1 Table 2 International Electrical Symbols ..... . 1 Specifications....... . 7...
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Page 7: Before You Start
Before You Start Symbols Used Table 1 lists the International Electrical Symbols. Some or all of these sym- bols may be used on the instrument or in this manual. Table 1 International Electrical Symbols Symbol Description AC (Alternating Current) AC-DC Battery CE Complies with European Union Directives Double Insulated... -
Page 8: Safety Information
5626/5628 User’s Guide Symbol Safety Information Use this instrument only as specified in this manual. Otherwise, the protec- tion provided by the instrument 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. -
Page 9: Hart Scientific Authorized Service Centers
Hart product: Hart Scientific, Inc. 799 E. Utah Valley Drive American Fork, UT 84003-9775 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... - Page 10 5626/5628 User’s Guide Phone: +86-10-6-512-3436 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 When contacting these Service Centers for support, please have the follow-...
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Page 11: Introduction
Introduction General The Hart Platinum Resistance Thermometers (PRT) models 5626 and 5628, are designed to be the best secondary standard interpolating instrument converting temperature to resistance. The PRTs are used with a readout de- vice to detect temperature changes or actual temperature. The PRTs cover the International Temperature Scale of 1990 (ITS-90) range from –200°C to 661°C. -
Page 12: Calibration
Scientific are calibrated using standard calibration techniques. Recalibration The recalibration of the 5626/5628 Secondary PRT should be scheduled ac- cording to the user’s company Quality Assurance requirements. Normally, a PRT is recalibrated annually. Unless the PRT is used only over a limited range, calibration over the full range of the PRT (–196°C to 661°C) is recom-... -
Page 13: Specifications And Warranty
Specifications and Warranty Specifications See Table 2 and Figure 2. Table 2 Specifications Temperature Range Resistance RatioW(Ga) Calibration Uncertainty (k=2) Short-Term Stability Long-Term Drift (R Sheath Handle Temperature Range Lead Wires Termination Size Strain Relief Figure 2 Standard Dimensions 5626 –200°C to 661°C ±1 at 0.01°C... -
Page 14: Construction
5626/5628 User’s Guide Construction The Model 5626 and 5628 PRTs cover the range from –200°C to 661°C. The sensor elements are crafted using high purity platinum wire wound in a strain free design on a specially designed support. Electrical Circuit The PRTs are provided with a terminal box handle. -
Page 15: Installation
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 comparison block. However, allow for the ther- mal expansion of the thermometer sheath when determining block well tolerances. -
Page 16: Prt Care And Handling Guidelines
DO anneal the thermometer after shipment. Shipping the thermometer can cause mechanical shocks that effect the accuracy of the thermome- ter. Therefore, if possible, we advise that the thermometer be annealed before use. The thermometer should be annealed at 500°C overnight or 660°C for four (4) hours. - Page 17 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 12 hours if it becomes oxidized. DO use the protective shipping box or case provided or other protec- tion when the thermometer is not in use.
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Page 18: Operation
152 mm (6 inches). This error is due to heat lost or gained by the sensing element through the thermometer stem. In addi- tion, heat losses occur due to radiation losses from the sensing element to the housing. -
Page 19: Thermal Emf
5626/5628 User’s Guide Thermal EMF Two factors contribute to thermal EMF, chemical consistency and physical consistency. Variations in chemical structure due to impurities can contrib- ute 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. -
Page 20: Prt Termination
Accessories Case Options The 5626/5628 PRT comes in a rigid case appropriate for the length of the probe. Model Number 2601 PRT Protective Case for 5626-12 and 5628-12 Model Number 2602 PRT Protective Case for 5626-15, 5628-15, 5626-20, and 5628-20 PRT... -
Page 21: 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 described 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, con- tact an Authorized Hart Scientific Service Center (see Section 1.3) for assis- tance. - Page 22 5626/5628 User’s Guide Problem Temperature readout differ- ent than expected, e.g. the heat source is set at 300°C, the PRT measures 275°C. Causes and Solutions • Measure the PRT resistance at TPW. • If the resistance of the PRT is less than the rated resis- tance, e.g.
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