Keithley 2182 Service Manual page 34

Nanovoltmeter
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3.
Set the calibrator to output DC volts, and turn external sense off.
4.
Perform the steps listed in
calibration step:
Set the calibrator to the indicated value, and make sure it is in operate.
Wait for the signal voltage to settle.
Press the ENTER key to calibrate that step.
Wait until the Model 2182 finishes each step. (The unit will display the
CALIBRATING message while calibrating.)
NOTE
Lock calibrator to the 11V range. If your calibrator cannot output the values
recommended in
RANGE keys to set the Model 2182 display value to match the calibrator output
voltage.
Table 2-4
DC volts front panel calibration summary
Calibration step
10.000000 V
-10.000000 V
* Use indicated values when possible.
Setting dates and saving calibration
At the end of the calibration procedure, the instrument will display the CALIBRATION
COMPLETE message. Press ENTER to continue, and the Model 2182 will prompt you to enter
the calibration date and the calibration due date. Set these dates as follows:
1.
At the CAL DATE: mm/dd/yy prompt, use the left and right arrow keys, and the RANGE
keys to set the calibration date, then press ENTER.
2.
The unit will then prompt you to enter the next calibration due date with this prompt:
CAL NDUE: mm/dd/yy. Use the left and right arrow keys, and the RANGE keys to set
the calibration due date, then press ENTER.
3.
The unit will prompt you to save new calibration constants with this message: SAVE
CAL? YES. To save the new constants, press ENTER. If you do not want to save the
new constants, press the down range key to toggle to NO, then press ENTER.
NOTE
Calibration constants calculated during the current calibration procedure will not be
saved unless you choose the YES option. Previous calibration constants will be
retained if you select NO.
Table 2-4
to complete DC volts calibration. For each
Table
2-4, use the left and right arrow keys, and the up and down
Calibrator voltage*
+10.000000V
-10.000000V
Calibration
Allowable range
+9V to +11V
-9V to -11V
2-9

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