Environnement AS32M, Technical Manual, Page: 130 / 186

Environnement
S.A
AS32M
Duplication prohibited
AUGUST 2013
5–6
Alarm messages
Min./Max. values Possible cause(s) Possible action(s)
Signal fault
Min. value: 500 mV
Max. value: 4500 mV
or
I. LED fault
Signal amplitude received by
phototube is out of limits or there is no
signal. Check the value of the current that supplies
the LED in the
« TESTS

Chamber
parameters

I LED » screen.
If the I LED value of the current that
supplies the LED is correct :

Check that the LD3 of the DIM board
blinks at the frequency of two hits per
second:

If the LD3 does not blink, change
the DIM board.

If the LD3 blinks, check the
presence of the blue radiation,
indicating that the LED is working.
If the LED works :

Check that the LD2 of the DNP-Arm7
board blinks at the frequency of two hits
per second:

If the LD2 blinks, switch the analyzer
off and on. If the problem still is
occurring, change the DNP-Arm7
board.

If the LD2 does not blink, change the
module board.
If the I LED value of the current that supplies
the LED is not correct:
– Change the DIM board.
Phototube or preamplifier board are
faulty.
–
On the DIM board, at the PT1 test point
check that the alternating signal oscillates
within 0V> I >4,5V. If there is no signal,
the pre-amplifier board is faulty: change
this board.
VFC conversion
Min. value: 2450 mV
Max. value: 2550 mV
If in « TESTS

MUX signals

2,5V
Ref. » , the channel 16 value is out of
limits, the digital/analog converter of
the module board is faulty.
– Check the +15VCC/ -15VCC power
supplies with the module board test points
(PT5, PT8, and PT1 ground). If the power
supplies are working correctly, change
the module board because the VFC
converter is faulty.