Fluke 5686 Скачать руководство пользователя страница 11

Glass Capsule Standard Platinum Resistance Thermometer

Before You Start

3

Caution  

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To avoid possible damage to the instrument, follow these guidelines.

•  DO NOT remove the label from the handle. The delicate nature of the 

instrument is described on the label. 

•  Read “Care and Handling Guidelines” before removing the SPRT from the 

shipping box or case. Incorrect handling can damage the SPRT and void the 

warranty.

•  DO NOT subject the thermometer to any physical shock or vibration.

•  Keep the shipping container in case it is necessary to ship the SPRT. 

Incorrect packaging of the SPRT for shipment can cause irreparable damage.

•  DO NOT subject the thermometer to temperatures above the highest 

specified operating temperature.

•  DO NOT expose the thermometer’s handle or cables to extreme 

temperatures.

•  DO NOT submerge the handle or cable in liquids.

Application

The 5686 thermometer is classified as a primary standard. A primary standard is defined in 

terms of transfer of the ITS-90 from a standards laboratory to a customer’s laboratory. Primary 

standards are calibrated in a standards lab using known intrinsic values. The SPRTs are designed 

to meet the National Voluntary Laboratory Accreditation’s (NVLAP) Level I Accuracy 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. Normally, an SPRT is recalibrated annually. Fluke Calibration has the 

capability of performing fixed point calibration, or comparison calibrations traceable to NIST.

Return Procedure

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Extreme care must be taken in shipping an SPRT. Place the thermometer in the factory provided 

protective storage case. Be sure the case is latched securely. Place the protective case in the 

original manufacturer’s wooden shipping crate or wooden crate with similar dimensions. Place 

soft insulation on all sides of the crate to cushion the SPRT against mechanical shocks. The cover 

of the crate should be attached with screws. We recommend that you label the crate as extremely 

fragile. Whether the thermometer is returned for repair or warranty, please include a letter 

containing the following information: 

• 

Description of the faulty operation and circumstances of failure. 

• 

Complete shipping instructions for the return of the thermometer to the customer.

Содержание 5686

Страница 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 ...

Страница 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...

Страница 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 ...

Страница 4: ...5686 Users Guide ii ...

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

Страница 6: ...5686 Users Guide iv ...

Страница 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 ...

Страница 8: ...5686 Users Guide vi ...

Страница 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...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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 ...

Страница 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 ...

Страница 16: ...5686 Users Guide 8 ...

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