Alcatel ASM 180 TD User Manual page 101

Initialize the acceleration
Switch off the detector
Autocalibrate
the detector
Alcatel Vacuum Technology France - ASM 180 TD/TD+ - ASM 181 TD+ User's Manual
Configuring the unit according
to the gas to be detected
Place a voltmeter between
terminal TP7 (ground) and
voltage
terminal TP3 (acceleration
voltage).
(Voltmeter rating ≥ 400 V=.)
Using a screwdriver, adjust
the potentiometer R31 to
adjust the voltage as a
function of the tracer gas used:
Tracer gas
Helium 4
Helium 3
Hydrogen
Set the circuit breaker switch to 0.
For mass 2 or 3 detection:
autocalibration is performed only with an external calibrated
leak: refer to section E 50 Autocalibration with external
calibrated leak.
For helium 4 detection (standard):
- to perform autocalibration with a calibrated leak inside the
detector, it is necessary to proceed as for a newly installed
leak: refer to section E 40 Replacement/recalibration of the
detector internal calibrated leak;
- to perform autocalibration with an external calibrated leak:
refer to section E 50 Autocalibration with external
calibrated leak.
TP4
TP3
TP3
Z3
J38 J40
Right side of the supervisor board
Mass Acceleration voltage
4 150 ± 2 V
3 198 ± 2 V
2 290 ± 2 V
C 60
CR55
TP7
Z5
R31
TP14
Z1
3/3