Pfeiffer Vacuum ASM 310 - Page 48

Access: Menu [Measurement] [Set points] Choice - Set-
ting limit
1)
Pollution To be enabled
This is a safety device for the detector. It prevents too much leaked tracer gas from pene-
trating the detector. We recommend setting the pollution set point to a maximum of 4 dec-
ades above the reject set point. If the leak rate rapidly increases above the pollution set
point, the cycle stops automatically and the leak detector returns to ‘Stand-by’ mode.
The function is only available with the ‘hard vacuum’ test method.
Useful function if the part or installation to be tested is likely to have gross leaks.
Enabled
Disabled
To be set
1 · 10
-19
–
1 · 10
+19
Hard Vac-
uum Set
Points
Reject point To be set for each tracer gas
The reject point is the acceptance set point for parts.
● Measured leak rate < reject point: part accepted
● Measured leak rate > reject point: part rejected
The set point is not displayed on the main screen or graph
screen when the detector is in ‘Stand-by’ mode.
1 · 10
-13
–
1 · 10
+06
Warning point To be enabled
The warning point is an intermediate set point defined according
to the reject point. It indicates that the user is approaching the
reject point, but the part tested is good.
The set point is not displayed on the main screen or graph
screen when the detector is in ‘Stand-by’ mode.
Display of the test result: see details below.
Enabled
Disabled
To be set
Example: reject point = 5 · 10
-5
-> if 20%, warning point =
1 · 10
-5
0–100%
Sniffer set
points
Reject point To be set for each tracer gas
The reject point is the acceptance set point for parts.
● Measured leak rate < reject point: part accepted
● Measured leak rate > reject point: part rejected
The set point is not displayed on the main screen or graph
screen when the detector is in ‘Stand-by’ mode.
1 · 10
-12
–
1 · 10
+06
Probe Clogged To be set
The probe clogged set point is used to verify that the sniffer
probe (accessory) is operational. When the probe flow is below
the ‘Probe clogged’ set point, a code is displayed to inform the
operator.
1 · 10
-19
–
1 · 10
+19
Warning point To be enabled
The warning point is an intermediate set point defined according
to the reject point. It indicates that the user is approaching the
reject point, but the part tested is good.
Display of the test result: see details below.
Enabled
Disabled
To be set
Example: reject point = 5 · 10
-5
-> if 20%, warning point =
1 · 10
-5
0–100%
1) Initial setting: see chapter “Tree diagram to the Settings menu”
For quick access from the main screen, use the [REJECT POINT] function key.
Settings menu
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