Agilent Technologies Helium Leak Detector
122
DRAFT 12
/11/17
These models all contain a diaphragm pump as shown above V8.
CAUTION Manipulation of the valves using the Manual Valve Control
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.
Table 7-1 Leak Detector Valve State Table - Single Mechanical Pump System
Leak Detector
Operating State
V1
Foreline
Valve
V2/V3
Contra-Flo
w V
alve
Test Mode
V4/V5
Midstage
Va
lve
Fine Test
Mode
V6
Calibrated
Le
ak
V7
Vent
Valve
V8*
Ballast
Valve
V8*
Exhaust
Valve
Vent O C C C O C O
Rough C O C C C C C
Gross Leak Test C O C C C C N/A
Contra-Flow Test O O C C C C O
Midstage Test O C O C C C O
Hold O C C C C C O
Sniff O O C C C C O
Read Std Leak O C C O C C O
O: Open C: Closed
Press the circle corresponding to that valve to change the state of a specific valve.
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