Galvanic Applied Sciences 943-TGX, Operation Manual

Page: 33 / 110

Revision 4 33 August 02, 2019
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.
d)
Control
Auto (Green) indicates that the analyzer output signals are deemed to be a valid
measurement of the process gas stream and may be used for control purposes if desired.
Manual
(amber) indicates that the analyzer output signals should be assumed to be
invalid (with respect to process stream measurement) and should not be used for control
purposes. The analyzer automatically forces the
Control
indicator to
Manual
in case of
any analyzer fault, a calibration sequence in progress (either manual or auto), or a user
initiated
Off Line
request