PC3000 Complete Installation guide iss 12 - Elektro-Trading

4 Channel Analogue Input Module
9-16
(5) Change the parameter Cal_Mode from Run ( 0) to CJC (4) in order to commence
calibration. The mode will revert back to Run ( 0) on completion of calibration.
(6) The value read by the CJC_Val will be the temperatue of the CJC sensor i.e.
approximately the temperature of the module.
(7) Change the parameter Cal_Mode from Run ( 0) to Save ( 1) in order to store the
new calibration data. On completion of the save operation the Cal_Mode will
automatically revert to Run ( 0) and Status_Info will indicate Ok ( 1)
(8) In the event of an error occurring whilst calibrating e.g.entering the wrong value
for the applied millivolt input, the calibration procedure may be aborted by
changing Input_Type to a different range and then back to its’ original value. The
calibration data that existed prior to the session will be restored.
Calibration of high level inputs
This applies to module variant:
PC3000/AI/VERSION3/V4
There are four ranges to be calibrated; 1V, 2V, 5V, and 10V. Each range is calibrated
in a similar fashion. Ranges are bi-polar i.e. -1V to 1V etc.The parameter Input_Type
must be set to the appropriate range prior to calibration.The millivolt reference
source should be connected to the input module as detailed.
Zero
+
-
12v 9.999v 0v + mV -
EUROTHERM 239
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The calibration input voltages are arbitrary but the following points are suggested for
each of the ranges:
Input Range Low cal point High cal point
1V -0.9V 0.9V
2V -1.8V 1.8V
5V -4.5V 4.5V
10V -9.0V 9.0V
nc
Function
V+
V-
CH1 CH2
2 5
3
4
Terminal Number
6
7
CH3 CH4
9 12
10
11
13
14
PC3000 Installation