Revision 1
47
9/10/2019
•
Back Purge -
The
Back Purge
button is used to indicate that zero gas (purge gas)
should be allowed to flow through the system. The Sample/Purge indicator will be
flashing red and the words Back Purge Sample will be indicated when zero gas is
flowing through the system. When
Back Purge
is selected, the analyzer sampling
system is continuously back purged with zero gas. This is useful as a precursor to
maintenance activities or when long term purging is required.
•
Manual Zero -
The
Manual Zero
button is used to initiate a zero sequence.
5.2.1.3 R
elay 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 continue to flow sample although the reading is considered to be invalid. An
occurrence of a fault status automatically forces the
Control
to
Manual
.
b) Service
Normal
(Green) status indicates that service is not required
Warning
(Red) 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 Zero
operation 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
Summary of Contents for 962-AGX
Page 43: ...Revision 1 43 9 10 2019 Figure 4 13 Network Sub Panel...
Page 86: ...Revision 1 86 9 10 2019 Figure 9 1 Customer Connections...
Page 87: ...Revision 1 87 9 10 2019 Figure 9 2 Analyzer Components...
Page 88: ...Revision 1 88 9 10 2019 Figure 9 3 Inputs and Outputs...
Page 89: ...Revision 1 89 9 10 2019 Figure 9 4 AC Wiring Overview...
Page 90: ...Revision 1 90 9 10 2019 Figure 9 5 DC Wiring Overview...
