Ac Voltage Verification - Keithley DMM7510 Calibration Manual

Model DMM7510 7½ Digit Graphical Sampling Multimeter Calibration Manual

AC voltage verification

To verify AC voltage accuracy:
•
For the 100 mV to 100 V ranges, apply accurate voltages from the calibrator to the Model
DMM7510 front-panel terminals.
•
For the 700 V range, connect the Fluke 5725A Amplifier to the calibrator. Apply accurate voltages
from the calibrator terminals to the Model DMM7510 front-panel terminals.
•
Verify that the displayed readings fall within specified limits
Use the values in the following tables to verify the performance of the Model DMM7510. Actual values
depend on the published specifications (see
The maximum input voltage between INPUT HI and INPUT LO is 1000 V
value may create a shock hazard.
The maximum common-mode voltage (the voltage between INPUT LO and chassis ground) is
500 V
peak
hazard.
Verify AC voltage accuracy for the 100 mV to 100 V ranges
Use shielded, low-capacitance cabling. For the 100 mV to 100 V ranges, avoid loading that exceeds
1000 ρF.
Excessive capacitance may result in additional load regulation uncertainties and could cause the
calibrator output to open (go into standby).
To verify AC voltage accuracy:
1. Connect the Model DMM7510 HI and LO INPUT connectors to the calibrator as shown in the
following figure.
DMM7510-905-01 Rev. A / April 2015
. Exceeding this value may cause a breakdown in insulation that can create a shock
Example reading limit calculation
Section 2: Performance verification
(on page 2-8)).
. Exceeding this
peak
2-13