Multifunction Process Calibrator
Calibration Adjustment Procedures
35
Cal mV Output
Connect the UUT as shown in Figure 18.
aal08f.eps
Figure 18. mV Output Calibration Connections
From the Calibration Menu, enter the cal step for Cal mV Output. The PC displays:
Zero into DAC. Enter mV displayed :
Set the HP 3458 to read V DC. Be sure the NPLC on the HP 3458 is slow enough to get
stable readings to three decimal places. When the reading on the HP 3458 has stabilized,
enter the value in millivolts on the PC, then press Enter. It is only necessary to enter four
places past the decimal point. It is not necessary to enter the units (mV). After a short
while, the PC displays:
Max value into DAC. Enter mV value displayed :
Enter the mV reading from the HP 3458 on the PC, press Enter, then press the space bar.
After a short while, the PC displays the following calibration constants and new prompt:
6537.086487 = 111.874998 - -12.450000 )/ 65279.00 mV per count = 6537.0864
87
- press space bar to continue
Press the space bar to return to the Calibration Menu.
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