XITRON 2000I, Руководство пользователя

Страница: 71 / 96

Calibration and Maintenance 71
This output level may be measured directly by using a calibration
standard
100k
Ω
resistor and a high precision DMM to monitor the
voltage drop across the standard resistor.
19. Calibrate to an output level of
+100.0000
µµ
A
. Adjust the output of the
2000 instrument as described in step 2, until the voltage measured is
10V
+/– 20
µµ
V
(assuming exact resistance of 10k
Ω
), i.e., a current of
100
µµ
A
+/– 2nA
This output level may be measured directly by using a calibration
standard
10k
Ω
resistor and a high precision DMM to monitor the voltage
drop across the standard resistor.
20. Calibrate to an output level of
+1.000000mA
. Adjust the output of the
2000 instrument as described in step 2, until the voltage measured is
1.0V +/– 15
µµ
V
(assuming exact resistance of 1k
Ω
), i.e., a current of
1mA +/– 15nA
This output level may be measured directly by using a calibration
standard
1k
Ω
resistor and a high precision DMM to monitor the voltage
drop across the standard resistor.
21. Calibrate to an output level of
+10.00000mA
. Adjust the output of the
2000 instrument as described in step 2, until the voltage measured is
1.0V +/– 20
µµ
V
(assuming exact resistance of 100
Ω
), i.e., a current of
10mA +/– 200nA
.
This output level may be measured directly by using a calibration
standard
100
Ω
resistor and a high precision DMM to monitor the voltage
drop across the standard resistor.
22. The next calibration point will be to measure
zero (0.0) VDC
. Attach a
small piece of #24 AWG buss wire to the output terminals and allow at
least two minutes for the reading to settle.
23. The final calibration point will be to measure
0.1VDC
. Remove the buss
wire and apply
0.1VDC
to the output terminals. Allow at least two
minutes for settling.