User's Manual

789
Calibration Manual
22
Table 10. DC Volts Test
789 Range Calibrator DC Voltage Minimum Reading Maximum Reading
4 V dc 1 V 0.998 V 1.002 V
4 V dc 3 V 2.996 V 3.004 V
40 V dc 10 V 9.98 V 10.02 V
40 V dc 30 V 29.96 V 30.04 V
400 V dc 100 V 99.8 V 100.2 V
400 V dc 300 V 299.6 V 300.4 V
1000 V dc 100 V 99 101
1000 V dc 800 V 798 802
AC Volts Measurement Test
 Warning
To prevent possible electrical shock, fire, or personal injury:
• Some of the calibration verification tests involve the use of high
voltages and should be performed by qualified personnel only.
• Always place the calibrator in the Standby (STBY) mode between
tests and before handling the test connections or test cables.
1. Put the calibrator in Standby (STBY) mode.
2. Put the UUT rotary switch in the S position.
3. Connect the calibrator to the
COM and  terminals on the UUT as shown in
Figure 9.
4. Apply the values from the calibrator shown in Table 11 and compare the readings on
the UUT to the acceptable readings shown.
Table 11. AC Volts Test
789 Range Calibrator Voltage and Frequency
Minimum Acceptable
Reading
Maximum Acceptable
Reading
400 mV ac 100 mV @ 60 Hz 98.9 mV 101.1 mV
400 mV ac 300 mV @ 60 Hz 297.5 mV 302.5 mV
4 V ac 1 V @ 60 Hz 0.991 V 1.009 V
4 V ac 2 V @ 60 Hz 1.984 V 2.016 V
4 V ac 3 V @ 60 Hz 2.977 V 3.023 V
40 V ac 10 V @ 60 Hz 9.91 V 10.09 V
40 V ac 30 V @ 60 Hz 29.77 V 30.23 V
400 V ac 100 V @ 60 Hz 99.1 V 100.9 V
400 V ac 300 V @ 60 Hz 297.7 V 302.3 V
1000 V ac 100 V @ 60 Hz 97 103
1000 V ac 800 V @ 60 Hz 792 808