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Input signal calibration
Calibration of the MIN OUT and MAX OUT 15–turn trimpots is
required to establish the relationship between the input voltage
signal range and the output range.
The true maximum and minimum input signal values are not
required. Because the PCM4 response is linear, any two
calibration points define the output vs. input relationship. Select
points as close to the range extremes as possible to minimize
extrapolation error.
The absolute maximum output from the PCM4 is 10 VDC. The
minimum input voltage to the PCM4 that can produce 10 VDC
output is 5 VDC.
Input voltage calibration
To calibrate when using a voltage input signal:
1. Verify that all DIP switches are OFF.
2. Set the SIGNAL INPUT ADJ to the input range position, as
indicated on Figure 12, page 22.
3. Apply the lower voltage input.
4. Set MIN OUT adjustment to obtain the desired lower voltage
output.
Calibration
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