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35040
Operators Manual
4.5 Bias Error
1.
Is "??Bias" displayed?
2.
Has the instrument been on for more than one minute?
Turn off the power. Wait 10 seconds. Turn on the power. Wait 1 minute. Is
3.
"??Bias" displayed?
4.
PROBLEM: Electrometer fault. See Section 4.10.
Change the bias voltage to a different setting and then change back. Wait
5.
about 10 seconds. Is the error on the display?
Change the bias voltage to 0.0 V. Disconnect all triax cables. Cap the
6.
connectors. Change bias voltage to desired setting. Wait about 10 seconds.
Is the error on the display?
Change the bias voltage to 0.0 V. Examine the triax connectors on the
7.
instrument, both front and rear, for foreign matter. Is foreign matter present?
8.
See Section 4.7.
9.
Normal operation established.
10.
Do you use a separate cable to connect the ion chamber to the instrument?
Change the bias voltage to 0.0 V. Connect only the cable to the instrument.
11.
Change the bias voltage to the desired setting. Wait about 10 seconds. Is the
error on the display?
12.
PROBLEM: Bias fault in cable. See Section 4.10.
Change the bias voltage to 0.0 V. Connect the ion chamber. Change the bias
13.
voltage to the desired setting. Wait about 10 seconds. Is the error on the
display?
14.
PROBLEM: Bias fault in instrument. See Section 4.10.
15.
PROBLEM: Bias fault in ion chamber. See Section 4.10.
16.
This message is displayed until the signals from the isolated side are valid.
4-8
Go to
line:
YES
2
NO
6
YES
3
NO
8
YES
4
NO
--
YES
5
NO
--
YES
7
NO
8
YES
9
NO
18
YES
10
NO
11
YES
12
NO
13
YES
14
NO
16
YES
15
NO
17
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Table of Contents
Troubleshooting
