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Step 5 The display will show dAC Hi. The voltage and current output will be set to the value
entered in Step 4. Adjust the VOLTAGE potentiometer on the I/O board to set the voltage.
The SPAN potentiometer may also be used at this time to adjust the current output. These
adjustments are shown in figure no. 17. After the adjustment is complete, press the
ENTER key.
Step 6 The display will show dAC Lo. The voltage output will be set to 0 volts and the current
output set to 4 mA. Adjust the OFFSET potentiometer on the I/O board to set the voltage
output to zero and/or the current output to 4 milliamperes. On completion, press ENTER.
Step 7 The 748 will return to Step 1.
NOTE: Because of interaction between the OFFSET and SPAN adjustments, answer YES to Step 1
and repeat calibration until no further adjustment is necessary.
I/O PC board
(solder side)
VOLTAGE adjust
OFFSET adjust
SPAN adjust
figure no. 17 - analog output calibration adjustment
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