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These models all contain a diaphragm pump as shown above V8.
Press the circle corresponding to that valve to change the state of a specific valve.
Table 7-1 Leak Detector Valve State Table - Single Mechanical Pump System
Leak Detector
Foreline
Operating State
Valve
Vent
Rough
Gross Leak Test
Contra-Flow Test
Midstage Test
Hold
Sniff
Read Std Leak
122
Agilent Technologies Helium Leak Detector
Manipulation of the valves using the Manual Valve Control
CAUTION
screen must only be performed by persons who are extremely
familiar with the leak detector as damage to critical
components (e.g., spectrometer, turbo) can occur.
V2/V3
V1
Contra-Flo
w Valve
Test Mode
O
C
C
O
C
O
O
O
O
C
O
C
O
O
O
C
O: Open
V4/V5
Midstage
Valve
V6
Fine Test
Calibrated
Mode
Leak
C
C
C
C
C
C
C
C
O
C
C
C
C
C
C
O
V7
V8*
Vent
Ballast
Valve
Valve
O
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C: Closed
V8*
Exhaust
Valve
O
C
N/A
O
O
O
O
O
- Quick Links:
- Section 2. Operating the Leak Detector
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