3/5
Alcatel - High Vacuum Technology - ASM 180 TD/TD+ - ASM 181 TD+ User’s Manual
Edition 03 - May 97
C 30
Detector autocalibration
If very accurate leak measurement is required in a
measurement range other than 1.10
-8
- 1.10
-6
,
it is recommended to use an
external calibrated leak, the
value of which is close to the required value
:
- Run an autocalibration as shown in section
- Once the autocalibration has
been completed and
validated, connect the external
calibrated leak to the detector
inlet port and run a test cycle
with the
key,
- Wait a few minutes for
the Helium signal to stabilize,
- Adjust the displayed Helium signal value manually as a
function of the external calibrated leak using the filament
current fine adjustment potentiometer.
Remember to take into account the effect of the temperature
on the value of the external calibrated leak in accordance
with the information given on the label. In the event of
problems, contact customer service.
Calibration range
Use of an external leak
Ie
+
3
2