Keithley 2182 Service Manual page 20

2.
3.
4.
5.
6.
7.
8.
9.
10mV range accuracy
1.
Figure 1-2
Connections for 10mV range accuracy
Model 2182
Wrap Connections
in Foam Insulation
Thermal Cable
2.
3.
4.
5.
6.
Turn on the power, and allow a 2-1/2 hour warm-up period.
Restore factory defaults, and do a full auto-calibration, as previously described.
Select the Model 2182 DCV1 measurement function, and select the 100mV range.
Set the calibrator output to 0.00000mV, and allow the reading to settle.
Enable REL, and leave it enabled for the remainder of the tests.
Verify reading accuracy for each of the voltages listed in
• Select the correct Model 2182 measurement range.
• Set the DC calibrator output voltage to the indicated value.
• Verify that the Model 2182 voltage reading is within the limits given in the table.
Repeat step 7 for negative source voltages with the same magnitudes as those listed in
Table 1-3.
Repeat steps 4 through 8 for the 100mV-10V ranges of the CHANNEL 2 input. Be sure
to connect the calibrator to the appropriate input jack terminals by changing input cable
wire connections, and select the DCV2 measurement function.
With the power off, connect the DC calibrator and low-thermal divider to the
Model 2182 CHANNEL 1 terminals of the input jack, as shown in
2107 Low
Thermal Cable
OUTPUT
OUTPUT
CHANNEL 1
LO
!
CHANNEL 2
SENSE
LO
LO
HI
OUTPUT
1506 Low
Model 262
Low Thermal
Divider
Turn on the power, and allow a 2-1/2 hour warm-up period.
Select the Model 2182 DCV1 measurement function, and choose the 10mV range.
Select the 100:1 divider ratio.
Set the calibrator output to 0.00000V, and allow the reading to settle.
Enable REL.
SENSE HI
HI
DC Voltage Calibrator
SENSE
HI LO
INPUT
Copper #18 AWG
insulated wire (Solid
or Stranded)
Performance Verification
Table 1-3. For each test point:
Figure 1-2.
1-7