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Appendix I. Electronic Troubleshooting
42
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Applied E (V)
Range
50 µA
1.000
20 µA
1.000
10 µA
1.000
5.0 µA
1.000
2.0 µA
1.000
1.0 µA
1.000
0.5 µA
0.100
0.2 µA
0.100
0.1 µA
0.100
1.000
50 nA
1.000
20 nA
1.000
10 nA
1.000
5.0 nA
1.000
2.0 nA
1.000
1.0 nA
0.100
0.5 nA
0.100
0.2 nA
0.100
0.1 nA
9.
Return to a POTENTIAL of +1.0 V and RANGE of 20 nA. The OUTPUT should be +0.485 to
+0.515 V. Flip the rear panel switch to RDN. The OUTPUT should now be –0.485 to
–0.515 V. Flip back to OXD.
10. Flip the MANUAL OFFSET polarity to [+]. Change the display to Offset
SET control knob until a reading of 10 nA is shown on the LC-4C display. The output
reading on the voltmeter should be 0 V ± 150 mV. Switch the OFFSET polarity to [–]
while leaving the POTENTIAL polarity at [+]. The voltmeter should now read +1 V ±
150 mV. Again, voltmeter readings may take 10–15 seconds to stabilize. Return the
OFFSET polarity switch to OFF.
11. If the instrument fails any step of this procedure, contact BAS customer service person-
nel (1-800-845-4246), and advise the service representative that you have completed
this electronics check.
Display
Back Panel
Output
Output (V)
9.7–10.2 µA
0.194– 0.206
9.7–10.2 µA
0.485–0.515
9.7–10.2 µA
0.980–1.030
9.80–10.20 µA
1.960–2.040
9.80–10.20 µA
4.900–5.100
9.80–10.20 µA
9.800–10.20
0.950–1.050 µA
1.900–2.100
0.950–1.050 µA
4.750–5.250
0.950–1.050 µA
9.500–10.50
9.7–10.2 nA
0.194–0.206
9.7–10.2 nA
0.485–0.515
9.7–10.2 nA
0.980–1.030
9.80–10.20 nA
1.960–2.040
9.80–10.20 nA
4.900–5.100
9.80–10.20 nA
9.800–10.20
0.950–1.050 nA
1.900–2.100
0.950–1.050 nA
4.750–5.250
0.950–1.050 nA
9.500–10.50
. Turn the OFF-
M
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