Keithley 2182, Руководство по обслуживанию, Страница: 21 / 120

7. Set the DC calibrator output voltage to 1.000000V.
8. Verify voltage reading accuracy for the 10mV range listed in Table 1-3 .
9. Repeat steps 7 and 8 for a negative 10mV source voltage by setting the calibrator voltage
to –1.00000V.
Temperature measurement accuracy
Follow the steps below to verify that Model 2182 temperature measurement accuracy is
within specified limits. This procedure involves applying thermocouple voltages from a
temperature calibrator and then verifying that Model 2182 temperature measurements are within
required limits.
NOTE If the Model 2182 meets its DC volts accuracy specifications, temperature accuracy
is automatically guaranteed, and it is not necessary to verify temperature measure-
ment accuracy. However, the following procedure is provided for those who wish to
independently measure temperature measurement accuracy.
1. With the power off, connect the temperature calibrator to the Model 2182 CHANNEL 1
input jack, as shown in
Figure 1-3 . Connect the free ends of the thermocouple wire
securely to the Model 2107 cable lugs, and observe proper polarity (thermo to
HI; thermocouple – to LO). Place the connections in a 0°C ice bath as shown.
Table 1-3
DC voltage measurement accuracy limits
Model 2182 range Calibrator voltage setting
Reading limits
(1 Year, 18°C-28°C)
10mV*
100mV
1V
10V
100V* 10.00000mV**
100.0000mV
1.000000V
10.00000V
100.0000V 9.99460 to 10.00054mV
99.9966 to 100.0034mV***
0.999973 to 1.000027V
9.99973 to 10.00027V
99.9961 to 100.0039V
** *Channel 1 only.
* **Use 100:1 divider ratio and 1.000000V calibrator voltage.
***99.9963 to 100.0037mV for channel 2.
1-8 Performance Verification