Keithley SourceMeter 2790 Reference Manual page 406

Model 2790 SourceMeter
Table 16-12
Limits for Model 7702 resistance verification
Nominal
Ω Range
resistance
100Ω∗ 100Ω
1kΩ 1kΩ
10kΩ 10kΩ
100kΩ 100kΩ
1MΩ 1MΩ
10MΩ 10MΩ
100MΩ 100MΩ
* Enable OCOMP for 100Ω range.
** Calculate limits based on actual calibration resistance values and Model 2790 and Model 7702 one-year resistance
accuracy specifications. See Verification limits.
7.
8.
9.
10.
11.
12.
Figure 16-13
Connections for Model 7702 resistance verification (100M
CH1
Model 7702
TE122
TE121
CH21
®
Switch System Reference Manual
Nominal reading limits
(1 year, 18°C to 28°C)
99.9880 to 100.0120Ω
0.999894 to 1.000106kΩ
9.99894 to 10.00106kΩ
99.9890 to 100.0110kΩ
0.999890 to 1.000110MΩ
9.99370 to 10.00630MΩ
99.4770 to 100.5230MΩ
Source the nominal full-scale resistance values for the 100Ω-10MΩ ranges summa-
rized in Table 16-12 and verify that the readings are within calculated limits.
Connect the Model 7702 CH1 and CH21 terminals to the calibrator as shown in
Figure 16-13.
Disable external sense on the calibrator.
Set the Model 2790 for the 100MΩ range.
Source a nominal 100MΩ resistance value and verify that the reading is within cal-
culated limits for the 100MΩ range.
Press the OPEN key to open Channel 1.
Recalculated limits**
__________ to __________ Ω
__________ to __________ kΩ
__________ to __________ kΩ
__________ to __________ kΩ
__________ to __________ MΩ
__________ to __________ MΩ
__________ to __________ MΩ
Ω
range)
Calibrator (Output 2-wire Resistance)
OUTPUT
HI
OUTPUT
LO
NOTE Use shielded cables to minimize
noise. Disable calibrator external
sense mode.
16-25