Keithley 2010, Service Manual, Page: 19 / 134

Verifying DC voltage
Check DC voltage accuracy by applying accurate voltages from the DC voltage calibrator to
the Model 2010 INPUT jacks and verifying that the displayed readings fall within specified
limits. Follow these steps to verify the DC voltage:
CAUTION Do not exceed 1000V peak between INPUT HI and INPUT LO because
instrument damage may occur.
1. Connect the Model 2010 HI and LO INPUT jacks to the DC voltage calibrator as shown
in
Figure 1-1 .
NOTE Use shielded, low-thermal connections when testing the 100mV and 1V ranges to
avoid errors caused by noise or thermal effects. Connect the shield to the calibrator’s
output LO terminal.
2. Select the DC volts function by pressing the DCV key, and set the Model 2010 to the
100mV range.
3. Set the calibrator output to 0.00000mV DC, and allow the reading to settle.
4. Enable the Model 2010 REL mode. Leave REL enabled for the remainder of the DC
volts verification tests.
5. Source positive and negative full-scale voltages for each of the ranges listed in
Table 1-2 . For each voltage setting, be sure that the reading is within stated limits.
Table 1-2
DCV reading limits
Range
Applied DC
voltage*
Reading limits
(1 year, 18°C–28°C)
100mV
1V
10V
100V
1000V
100.0000mV
1.000000V
10.00000V
100.0000V
1000.000V
99.99540 to 100.00460mV
0.9999730 to 1.0000270V
9.999720 to 10.000280V
99.99600 to 100.00400V
999.9530 to 1000.0470V
* Source positive and negative values for each range.
2000 MULTIMETER
!
R
Output HI
Input
LO
Output
LO
Model 2010
5700A Calibrator (Output DC Voltage)
Note : Use shielded, low-thermal cables
for 100mV and 1V ranges.
Input HI
Figure 1-1
Connections for DC
volts verification
1-6 Performance Verification