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35040
Operators Manual
4-4
7
Additional operator settings
are invalid.
Select the proper settings
from the front panel.
8
Timer interval customization
settings are invalid.
Reinstall settings using the
Customization software.
9
Additional calibration
settings are invalid.
Do NOT make
measurements. Return
instrument for repair.
Explanation: The instrument detects whether the stored parameters are valid at power-up. If the
parameters are invalid, it will affect one or more of the measurements. The operator may
restore some of the information either by selecting options from the front panel or by
running the customization software. Invalid calibration settings require a new calibration.
Follow the recommendations in the above table.
Symptom: "Current Overrange"
displayed.
Cause: The input current has exceeded the 1.200 uA limit.
Action: Stop the exposure. Change the setup to reduce the current.
Explanation: The instrument has a 1.000 uA limit on measurable current and will continue to measure
charge for currents up to 1.200 uA. The instrument can accept an input current up to 3
mA without damage to the instrument.
Symptom: “Current Overrange” displayed.
Cause: The input current has exceeded the 100 nA limit.
Action: Stop the exposure. Change the setup to reduce the current.
Explanation: The instrument has a 100 nA limit on measurable current. The instrument can accept an
input current up to 3 mA without damage to the instrument.
Symptom: Dashes displayed instead of digits.
Cause: No meaningful measurement could be obtained.
Action: Press the RESET/MEASURE button to reset the measurements.
Explanation: ICBias —.- V : the bias voltage measurement is unavailable due to invalid signals within
the instrument. This is a normal momentary condition when the instrument is powered
up.
Symptom: The bias voltage measurement changes by one digit.
Press RESET/MEASURE
Reduce exposure and
ADC
Current Overrange
Press RESET/MEASURE
Reduce exposure and
ADC
Current Overrange