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List of Tables

Table

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Table 1. International Electrical Symbols ...............................................................................................2

Table 2. Specifications

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Summary of Contents for 5686

Page 1: ...ndard Platinum Resistance Thermometer 2004 Rev 1 4 11 2004 2011 Fluke Corporation All rights reserved Specifications subject to change without notice Users Guide All product names are trademarks of their respective companies ...

Page 2: ...earest Fluke authorized service center to obtain return authorization information then send the product to that service center with a description of the difficulty postage and insurance prepaid FOB Destination Fluke assumes no risk for damage in transit Following warranty repair the product will be returned to Buyer transportation prepaid FOB Destination If Fluke determines that failure was caused...

Page 3: ...on 3 Return Procedure 3 Verifying Probe Accuracy 3 How to Contact Fluke 4 Specifications 5 Construction 5 Installation 5 Environmental Issues 5 Mounting 5 Electrical Circuit 5 Care and Handling Guidelines 6 SPRT Care 6 Handling Guidelines 6 Operation 6 General 6 Comparison Calibration of Other Instruments 6 Measuring Current 7 Thermal EMF 7 ...

Page 4: ...5686 Users Guide ii ...

Page 5: ...iii List of Tables Table Title Table 1 International Electrical Symbols 2 Table 2 Specifications 5 Page ...

Page 6: ...5686 Users Guide iv ...

Page 7: ...v List of Figures Figure Title Page Figure 1 5686 Glass Capsule Standard Platinum Resistance Thermometer 1 Figure 2 The construction of 5686 SPRT 5 ...

Page 8: ...5686 Users Guide vi ...

Page 9: ... Long stem SPRTs are not suitable for some applications where the probe should be encased into a vessel completely The 5686 SPRT covers the range from 13 K 260 C to 505 K 232 C The 5686 is carefully annealed at the appropriate temperatures and precisely tested for stability The sensing elements are fabricated using high purity platinum wire wound in a strain free design on a fused silica cross fra...

Page 10: ...in this manual Otherwise the protection 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 Caution identifies conditions and actions that may damage the instrument being used Warning To avoid personal injury follow these guidelines DO NOT use this instrument to measu...

Page 11: ...acy Class Calibration In order for any instrument to be used as a standard it must be calibrated The SPRT may be purchased calibrated or non calibrated Fluke Calibration has the capability of performing fixed point calibration or comparison calibrations traceable to NIST Recalibration The recalibration of the SPRT should be scheduled according to the user s company Quality Assurance requirements N...

Page 12: ... You may have to use the probe s temperature versus resistance table and interpolate to get the probe s calibrated resistance value at 0 C 5 Considering the probe s uncertainty specification determine whether or not it is within tolerance of the data on its most recent certificate of calibration If it is it may be placed in service If not double check the probe coefficients in the readout If they ...

Page 13: ...er facility specifically designed for this purpose Environmental requirements include Stable temperature and humidity Clean draft free area Low noise level low radio frequency magnetic or electrical interference Low vibration levels Mounting Capsule type SPRTs are usually used totally immersed meaning that they are generally inserted into a well in a copper block The connections are made to long f...

Page 14: ...bly 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 sensor Do not submerge the handles Allow sufficient time for the thermometer to stabilize before making measurements This allows for the best accuracy Use the correct drive current with the thermometer to ...

Page 15: ...his can be done graphically by plotting i vs R and extrapolating to zero power or by using the following equation R0 R1 i1 2 R2 R1 i2 2 i1 2 Where R0 Zero current resistance R1 Resistance measured at current i1 R2 Resistance measured at current i2 The exact immersion depth required can be determined by performing a gradient test taking measurements approximately every 1 2 inch 1 27 cm until there ...

Page 16: ...5686 Users Guide 8 ...

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