Prt Care And Handling Guidelines; Prt Care; Prt Handling Guidelines - Fluke 5606 User Manual

5606, 5607 Full Immersion PRT
PRTCare

5 PRT Care and Handling Guidelines

5.1 PRT Care

CAUTION: READ THIS SECTION BEFORE REMOVING THE PRT
FROM THE SHIPPING BOX OR CASE
The 5606 and 5607 Platinum Resistance Thermometers (PRTs) are delicate instru-
ments. Care must be taken in handling the PRTs to maintain calibration accuracy. The
partial stress free design of the PRT sensor reduces the effects of mechanical shock.
However, care should still be used when handling the PRT even though the metal
sheath is durable and provides good protection for the sensor. Correct handling of the
PRT will prolong the life expectancy. When not in use, the PRT should be stored in a
safe place where the risk of unintentional mechanical shock is minimized.
NOTE: The PRT sheath changes color after use at high temperatures. The PRT
may arrive with a brown tint to the sheath due to calibration at high
temperatures.

5.2 PRT Handling Guidelines

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DO measure the R
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tpw
DO keep the thermometer as clean as possible.
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DO immerse the thermometer in the appropriate liquid for the temperature
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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 sensor).
DO allow sufficient time for the thermometer to stabilize before making
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measurements. This allows for the best accuracy.
DO use the correct drive current with the thermometer to prevent error in
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temperature or resistance. Hart Scientific recommends 1mA.
DO use the protective shipping box or case provided or other protection when
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the thermometer is not in use.
DO NOT subject the thermometer to any physical shock or vibration.
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DO NOT use pliers or other devices to squeeze the sheath. This action can
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permanently damage the PRT.
DO NOT subject the thermometer to temperatures above the highest specified
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operating temperature.
DO NOT screw a clamp down so tight that it dents the sheath. This can
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permanently damage the PRT.
DO NOT expose the 5607 transition junction and lead wires to liquid.
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value of the thermometer after shipment.