D135-10-880C - Troubleshooting
Page 102
W76
Maximum evacuation time
until measurement exceeded.
Within the pre set evacuation
time measurement mode was
not reached.
"Test sample has got a GROSS leak." and "Wrong
setting (too short) of maximum time of
evacuation."
W77 Peak not in range
The signal maximum has shifted to mass range
alignment limits.
Signal of leak rate was unstable during mass
adjustment. Calibrate again.
Check the basic setting for the anode voltage
through the service menu.
Check calibrated leak.
W78
Differences of signal between
test leak open and closed is too
low.
The amplifier voltage difference between opened
and closed calibrated leak is less than 10 mV.
Calibrated leak has not been closed properly.
W79 Signal of test leak is too small
Calibrated leak is too small or has not been
opened. Pre-amplifier voltage < 10 mV.
W80 Calibrate machine newly
The automatic request of calibration is activated
and has fulfilled at least one of the conditions:
30 minutes are passed since power on.
Temperature of the pre-amplifier has changed
more than 5 °C since the last calibration.
Mass adjustments were changed.
Change of TMP speed to 920 Hz, GROSS only mode
W81 CAL Factor too low
The calculated factor falls out of the valid range
(< 0.1). The old factor is retained.
Possible fault cause:
The conditions for calibration have not been
maintained.
The leak rate of the internal calibrated leak which
was entered is much too small.
The internal test leak is defect.
W82 CAL Factor too high
The calculated factor is out of the valid range
(> 10). The old factor is retained.
Possible fault cause:
The conditions for calibration have not been
maintained.
The leak rate of the internal calibrated leak which
was entered is much too high or much too small.
Table 24 Fault finding (continued)
No. Displayed message Description and possible solutions
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