Baker Hughes Druck Dry TC 165, Instruction Manual

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Copyright 2013 Baker Hughes Company.
36 | Dry TC / Liquid TC Temperature Calibrators–English
Note: See Section 5.4.4.5 for details on new duration time parameter activation.
5.4.4.5 Heating and Cooling Gradient Parameter Activation
The calibrator uses the new gradient control settings or temperature profile when:
a. The set point temperature is changed.
b. The calibrator is switched off and back on again.
c.
The controller is changed to manual mode and then changed back to automatic mode. See
Section 5.4.2.
6. Testing Process / Calibration
6.1 Testing Temperature Sensors
A separate temperature measuring instrument is required to measure the output of the DUT. The
output of the DUT is compared to the temperature of the calibrator. The reference temperature,
derived from the calibrator’s internal temperature sensor, is used for the calibration comparison.
Note:
The DUT requires a short period of time to equalize with the temperature of the dry block
or micro bath.
6.2 Testing Procedure
6.2.1 Before Starting
Before starting the testing process, check that:
1. The calibrator has a suitable installation site and operational position. See Section
4.1.
2. The electrical connections have been made correctly. See Section 4.2.
3. The correct insert has been selected for the testing. See Section 4.3.
4. The insert is clean and dry.
Note: Ice and condensation can be removed from the insert by gently heating above 100 °C
(212 °F).
5. The DUT is held securely in the calibrator.
6. The calibrator has sufficient structural stability.
6.2.2 Performing the Testing
During the testing process, one or more test points are selected and the reference temperature
of the calibrator is compared with the measured temperature of the DUT.
HOT SURFACE
The calibrator may become very hot when in operation.
Touching hot parts can result in serious injuries.
Never touch the dry block, micro bath, inserts or the DUT at temperatures above
35 °C (95 °F) or below 10 °C (50 °F).
Allow the calibrator to cool before you remove the DUT, change the insert or
switch off the calibrator.
INFORMATION
For optimum performance, allow the calibrator to warm up
for at least an hour before use.
INFORMATION
Earthed thermocouples cannot be calibrated. The dry block
is earthed. The resulting short-circuit leads to incorrect measurements.