Analog Output Calibration Adjustment; Figure No. 11 - Cardinal 748P Technical/Operation Manual

Step 1 The display will show CALdAC.
Step 2 Press the ENTER key and the display will show NO. If you press ENTER at this point, the
analog output calibration process will be ended. Press the 1 key to change the display
to YES to proceed with Step 3 of the analog output calibration, or press the 0 key to
change the display back to no. Press ENTER.
Step 3 The display will show bH 0=, the weight below zero for the analog output to be minimum
(0 volts or 4 MA). Press ENTER to display the displayed setting. Press ENTER to store
displayed setting, or enter the desired weight and press ENTER.
Step 4 The display will show dAC H=, the maximum voltage to be output at capacity. Press
ENTER to display the displayed setting. Press ENTER to store the displayed setting or
enter the desired value 00.000 to 10.000 and press ENTER.
If the maximum voltage is known, the current output will be:
If the maximum current is known, the dAC H= setting will be:
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 748P 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)
figure no. 11 - analog output calibration adjustment
Current = x 16 + 4 (mA)
dAC H=
x 10 (volts)
00.000 = 4.0mA
5.000 = 12.0mA
10.000 = 20.0mA
39
VOLTAGE adjust
OFFSET adjust
SPAN adjust