Galvanic Applied Sciences 943-TGS, Operation Manual

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Revision 1 36 6/27/2017
with the On Line / Off Line button) has been incorporated as a convenience to the user. The
On Line / Off Line function essentially provides a method of signaling that the analyzer data is
invalid (undergoing maintenance or servicing).
When returning the analyzer to On Line status, the relay indication for Control will return to
the Auto state only if no fault or calibration conditions exist.
The plot displays the air demand as a function of time. The range for the x and y axes can be
edited as described in Section 4.8.
4.3.2 Air Demand, H
2
S, SO
2,
COS, CS
2
and S
vap
Fields
The
Air Demand, H
2
S, SO
2,
COS, CS
2
and
S
vap
fields indicate the present values of these
parameters and cannot be edited. The analyzer physical scaling is optimized for the
measurement of the typical on-ratio concentrations of H
2
S and SO
2
. Sulfur vapor (S
vap
) is
monitored to indicate when there may be a problem with the cooling finger in the probe. CS
2
may optionally be included in the analysis.
4.3.3 Relay Indicator Fields
The
relay indicators
show the state of the analyzer outputs:
a) Status
Normal
(Green) status indicates that the system is working properly
Fault (Red) status indicates that the computer has detected an error in one of the critical
analyzer functions. The Status indicator and alarm relay are placed in a fault state. The
analyzer will go into the backpurge mode and instrument air will flow through the cell. An
occurrence of a fault status automatically forces the ‘Control’ to Manual.
b) Service
Normal
(Green) status indicates that service is not required
Warning
(yellow) indicates that the computer has detected that one of the parameters for
a warning condition is out of range. This indicates that service is requested but not
required immediately. The analyzer continues to function normally, producing usable
outputs.
c)
Mode
Run (Green) status indicates that the system is in Run mode
Calibrate
(Amber) indicates that a zero calibrate sequence is in progress. At the end of
the calibration sequence the
Mode indicator
returns to
Run
. A manually initiated Force
Zero condition also causes a Calibrate mode. The mode alarm relay contacts are
changed in conjunction with the indicator. An occurrence of the
Calibrate
mode
automatically forces the
Control
to Manual.