Fluke 5623A 5 PRT Care and Handling Guidelines

5 PRT Care and Handling Guidelines

CAUTION: READ THIS SECTION BEFORE REMOVING THE PRT

FROM THE SHIPPING BOX OR CASE

Care mustbe taken in handling the PRT to maintain calibration accuracy. Care

should still beused when handling the PRT even though the Inconel sheath is

durableand p rovidesgood protection for the sensor. Correct handling of the

PRTwill prolong the life expectancy. When not in use, the PRTshould be

stored in an optional protectivecase that can be purchased from Hart Scientific.

The handle is designed to be immersed.

•DO keep the thermometer as clean as possible.

•DO immerse the thermometer in the appropriate liquid for the tempera-

ture range. If a dry block is used, the well diameter should allow the PRT

to comfortably 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 sen-

sor).

•DO allow sufficient time for the thermometer to stabilize before making

measurements. This allows for the best accuracy.

•DO use the correct drive current with the thermometer to prevent error in

temperature or resistance. Hart Scientific recommends 1mA.

•DO use the protective shipping box provided or other protection when the

thermometer is not in use.

•DO NOTsubject the thermometer to any physical shock or vibration.

•DO NOTuse pliers or other devices to squeeze the sheath. This action

can permanently damage the PRT.

•DO NOTsubject the thermometer to temperatures above the highest

specified operating temperature.

•DO NOTexpose the thermometer’s handle or cables to extreme tempera-

tures. The temperature limits of the handle are: –200°C to 156°C

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5PRT Care and Handling Guidelines