Keithley DMM6500 Calibration Manual

Section 2: Performance verification Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual
2-40 DMM6500-905-01 Rev. A/July 2018
Verify the DMM6500 zero:
1. On the calibrator, select the OPR/STBY key. Make sure that the front panel displays STANDBY.
2. Verify the DMM6500 zero reading for each range.
Apply a relative offset to the system:
1. On the calibrator, select the OPR/STBY key. Make sure that the front panel displays OPERATE.
2. Enable the calibrator Amplifier and select the BOOST key.
3. On the calibrator, set the amplifier range lock to ON.
4. Set the calibrator output to 0.00000 ADC and allow the reading to settle.
5. Press the MENU key.
6. Select Calculations.
7. Select Rel and Acquire.
8. Source positive and negative full-scale and half-scale currents, as listed in the following table.
9. Verify that the STATISTICS swipe screen reading for average is within low and high limits.
Verify digitize current 10 A range
Description
Calibrator setpoint
(A)
Lower limit
Upper limit
UUT Zero
STANDBY
-8.00E-03 REL
8.00E-03 REL
Full scale (+)
10
9.99670E+00
1.00330E+01
Half scale (+)
5
4.97950E+00
5.02050E+00
Half scale (–)
–5
–5.02050E+00
–4.97950E+00
Full scale (–)
–10
–1.00330E+01
–9.99670E+00
AC current 10 A verification
Verify that the displayed readings are within specified limits.
Use the values in the tables following the steps below to verify the performance of the DMM6500.
Actual values depend on the published specifications (see Example reading limit calculation (on page
2-4)).
To verify the AC current accuracy:
1. Set the TERMINALS switch to REAR.
2. Press the FUNCTION key, select the Measure Functions tab, and select AC Current.
3. Press the HOME key.
4. Set the range to 10A.
5. Press the MENU key.
6. Under Measure, select Settings.
7. Make sure that detector bandwidth is set to 30 Hz.
AC current is specified for the detector bandwidth setting of 3 Hz. 3 Hz measures accurately for input
signals from 3 Hz to 10 kHz, with reading rates of ≈ 0.5 readings/s. To improve verification
throughput to ≈ 3.3 readings/s, set detector bandwidth to 30 Hz for frequencies of 30 Hz to 10 kHz.
To verify frequencies 1 kHz and higher, set the detector bandwidth to 300 Hz for faster ≈ 55
readings/s throughput.

Keithley DMM6500 Specifications

General

Brand	Keithley
Model	DMM6500
Category	Multimeter
Language	English