Pfeiffer Vacuum ASM 340 - 13 Purge Valve; 14 Start-Up Time Delay

3.
Start the 1
st
test.
4. Activate the Memo function (logic input or RS-232 serial link command).
–
The new coefficient is automatically calculated and saved.
The 1
st
coefficient (Coef 1) calculated for the 1
st
test corresponds to the following ratio: target
value/leak rate value of the 1
st
test
The calculated coefficient must be between 0.5 and 3 inclusive. If not, an error message is
displayed.
5. Stop the test and deactivate the Memo function (logic input or RS-232 serial link command).
6. Repeat all of the last 3 operations n times:
●
Start a test
●
Enable the Memo function.
●
Stop the test and disable the Memo function
The calculated and memorized coefficient is readjusted after each test, as in:
Coefficient = Coef 1 + Coef 2 + ... + Coef n / n
7. Stop the dynamic calibration coefficient calculation.
The coefficient will continue to be readjusted after each test until the dynamic coeffi-
cient calibration calculation is stopped.
8.2.13 Purge valve
The purge valve protects the detector from becoming polluted thanks to a continuous air flow inside the
vacuum part of the detector.
For a global test of the leak detector, this valve must be closed.
Access: Menu [Test] [Purge valve]
Choice - Setting limit
1)
Purge valve Wet model
The purge valve is always closed.
-
Dry Model
To be selected
● Automatic: valve opening/closing managed in the detector's firmware
●
Closed = valve always closed
2)
●
Open = valve always open
2)
Automatic
Closed
Open
Integrable model
To be selected
●
Closed = valve always closed
2)
●
Open: valve always open
2)
Closed
Open
1) Initial setting: see chapter “Tree diagram to the Settings menu”
2) Temporary Opening/Closing managed by the detector firmware if necessary, then return to the set status
8.2.14 Start-up time delay
The start-up timer prevents the leak detector from being used for a pre-determined duration after it has
been switched on.
No measurements can be made if the leak detector is not thermally stabilized, or while traces of tracer
gas remain in the detector.
Access: Menu [Test] [Start-up timer]
Choice - Setting limit
1)
To be set
Initiation value
00'00'' – 59'59''
1) Initial setting: see chapter “Tree diagram to the Settings menu”
Settings menu
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