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4-66 | Model 933S UV Analyzer

Wheel Speed (rpm)

The current Optical Bench Chopper (Filter) Wheel speed in revolu-

tions per minute (RPM).

Remote AZero

The current status of the remote, dry (potential free) contact, either

OFF (closed) or ON (open). When start is displayed, the remote auto-

zero function has been initiated from a remote control room, such as a

Distributed Control System.

Warning Relay

The current status of the Warning Status relay. When the analyzer is

operating in its Normal Run state, this relay is energized. This relay

is de-energized if a Warning alarm condition exists within the ana-

lyzer’s built-in diagnostic system (the analyzer requires attention). The

Warning contacts will also become de-energized if you manually force

the analyzer’s Flow Control Mode to any mode other than Analyzer

(auto) Control. When not in the Normal state, this field has a Red back-

ground.

Resetting of the contacts is delayed by the Sample Delay Timer dura-

tion; otherwise, this relay’s contacts reset automatically upon correc-

tion of the Warning alarm or upon switching back to Analyzer Control

Mode.

Fault Relay

When the analyzer is operating in its Normal Run state, this relay is

energized. This relay is de-energized if a Fault alarm condition exists

within the analyzer’s built-in diagnostic system (the analyzer requires

service). When not in the Normal state, this field has a Red back-

ground.

When a Fault alarm condition exists (relay is de-energized), the sample

system Flow Control mode will automatically switch to “zero” mode

if the analyzer’s Flow Control Mode is set to “auto” (Analyzer Control

Mode).

If the relay is configured to latch (default) it will not clear unless you

manually reset the alarm; if not, it will reset automatically upon cor-

rection of the Fault alarm.

Whenever a Fault alarm condition exists, the text on the Display mes-

sage lines on the Optical Bench, Sensors, Gas Calibration, and Infor-

mation dialog boxes will turn Red to indicate a fault status.

Ametek 933S User Manual

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