Purge Air Alarm; Liquid Sample Valve - ABB PGC2000 Operation And Service Manual

Purge Air Alarm

The analyzer contains circuits that detect the loss of purge air to the analyzer and generate alarm
signals to the operator. The customer has the responsibility to connect the purge alarm to a visual or
audible annunciator located in a constantly monitored area, as required by NFPA 496 (1993).

Liquid Sample Valve

The Liquid Sample Valve (LSV) utilizes two different connection methods for the sample lines. Earlier
analyzers had these sample lines connected directly to the LSV, as shown in Figure 2-1.
Figure 2-1. LSV CONNECTION METHODS, EARLY ANALYZERS
2000-OSM, F1
Putting a loop in the tubing or using flexible
hose reduces any sideways force at the
connection.
Forcing the tubing into a position can
exert a sideways force at the
connection, causing valve leakage.
INCORRECT CORRECT
2-3