Copyright 2013 Baker Hughes Company.
22 | Dry
TC / Liquid
TC Temperature Calibrators–English
If LED OUT 1 lights up permanently, the calibrator is heating up. The temperature control is
active. The heating is being applied at full power so that the set point is reached as quickly as
possible.
Figure
18: Regulation to Set Point Example
As the dry block / micro bath temperature nears the set point temperature, power is reduced to
the heating element. This is to reduce overshoot. Power is controlled by pulse width modulation.
LED OUT 1 begins to flash as power is reduced. The controller will automatically adjust the
heating element power to maintain a stable temperature at the desired set point.
5.2.3 Display of Fan / Cooling Control
Figure
19: Active Fan / Cooling Display
LED OUT 2 indicates the status of the fan / cooling control:
a. Heating Instrument – Indicates the status of the output for the fan control:
•
If LED OUT 2 is lit, the fan is running at high speed.
•
If LED OUT 2 is not lit, the fan is running at low speed.
b. Heating and Cooling Instrument – Indicates the status of the output for the temperature
control:
•
If LED OUT 2 is lit, the dry block or micro bath is cooling.
•
If LED OUT 2 is not lit, the dry block or micro bath is not cooling.
5.2.4 Display of Heating / Cooling Capacity and Operating Duration
In calibration mode, the heating or cooling capacity and the operating duration of the calibrator
can be shown. The current values appear on the lower (green) display.
5.2.4.1 Heating / Cooling Capacity
1. Hold down the
key.
2. The current heating and cooling capacity is displayed in percentage of the maximum
capacity.
PV
SP
OUT 1
Time
Time
Controller cycle time
