5626-15-G User Manual for the Fluke 5626-15-G Secondary Standard Platinum Resistance Thermometer PRT with Gold Pins, 15 x 0.25in, 100Ω

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4-1

Chapter 4

Installation

4.1 Environmental Issues

Ideally, temperature calibration equipment should be used in a calibration

laboratory or other facility specifically designed for this purpose. Environmental

requirements include:

• Stable temperature and relative humidity < 80 %

• Clean, draft-free area

• Low noise level: low radio frequency, magnetic or electrical interference

• Low vibration levels

4.2 Mounting

Most often temperature standards, primary and secondary, are used to calibrate

other temperature-sensitive equipment. The PRT must be mounted carefully to

avoid any damage to the sheath or sensor. If the fluid bath used does not have a

lid designed for PRT insertion, clamps should be used to ensure the handle and

cable are not immersed. 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 thermal expansion of the thermometer sheath when

determining block well tolerances.

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FLUKE 5626-15-G Secondary Standard Platinum Resistance Thermometer PRT with Gold Pins, 15 x 0.25in, 100Ω