Sterlco M2B+ Controller - Manual (Page 43)

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5-15 Calibrating the T/C, RTD, and V Inputs
ACS Group will certify that all controllers are factory calibrated and the
calibration parameters are electronically stored in the controller to
maintain its optimum performance. Due to the design of our input
circuitry, the factory calibration should be valid for the life of the
instrument. ACS Group controllers are not calibrated to a traceable
N.I.S.T. standard.
ACS Group can provide documentation to support that our 1000-ohm
RTD’s are currently manufactured to IEC 751 specifications. All product
testing is performed in accordance with established procedures, using
standards traceable to the National Institute of Standards and Technology.
This calibration procedure describes the operator procedures for calibrating the Controller
Sensor Input (T/C and RTD) and the Analog input (V).
Use the following procedure to calibrate all three sensor inputs:
1. While the controller is powering on, hold the Index button and the Enter button when
the “Selftest in Progress” message is displayed. This will put the controller into
Factory mode.
2. Press the Index button two times so that the display reads “Calibrate?<ENT=YES>”.
3. Press the Enter button to begin calibration.
4. Use the Index button to cycle through the six calibration parameter menu selections:
LOCalJTC(25C) = nn.n
HICalJTC(345C) = nn.n
LOCalR1K(10R) = nn.n
HICalR1K(2K1) = nn.n
LOCalRSp(0.1V) = nn.n
HICalRSp(9.9V) = nn.n
5. Use the Up and Down buttons to select the calibration value for each parameter.
6. Press the Enter button to save the value.
Calibrating the Thermocouple Input (T/C)
This thermocouple calibration procedure requires a “J” T/C reference
source to calibrate this analog input circuit. Once the circuit is calibrated,
either a Type “J” or a Type “K” thermocouple can be selected for
operation.