Galvanic Applied Sciences 943-TGX-CE, Руководство по эксплуатации

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Revision 4 41 April 2020
If an output is programmed to be Track, the output value will track along with the calculated
values when the analyzer is placed in back purge mode, and thus will go to zero (4 mA)
when the analyzer is in back purge mode. If an output is programmed to be Hold, it will hold
the last known good value from when the analyzer was in sampling mode and continue to
output this good concentration value until the analyzer goes back into sampling mode. Thus,
the analog output will NOT go to 0 (4 mA) when the analyzer is in back-purge mode.
Typically, an analog output configured to output air demand will be configured for Hold, while
concentration outputs are configured for Track, though this is entirely up to the user to
decide. The value output by each analog output is updated once per second. The
configuration of the analog outputs can be done either using the local display and keypad,
as described in Section 4.8.1, or by using the Web GUI, as described in Section 5.4.
3.5.2 Digital Outputs (Relays)
There are four digital outputs on the analyzer which are used for outputting analyzer status
and other operational condition data. These digital outputs are all zero potential form C relay
contacts, each isolated to 250 V
rms
. The four status and operational relays are Status ,
Service , Mode , and Control . Each of these relays has an associated status indicator on the
analyzer display for visual confirmation of the analyzer status
3.5.2.1 Status
The Status output indicates whether there are any faults present that will force the
analyzer into back-purge mode until the fault is cleared. Table 3 describes the Status
relay states.
Table 3: Status Relay States
State Display Indicator Colour Explanation
Normal Green
All monitored system parameters are
within normal limits. No faults are present
Fault Red
At least ONE of the following conditions
is true:
•
Analyzer power is off
•
Measurement Cell temperature
is outside specified range
•
Probe temperature is outside
specified range
•
Measured sulfur vapour
concentration is above specified
fault setpoint
•
Spectrometer parameters are
outside specified range
•
The system computer is unable
to communicate with the I/O
board
•
The system computer is unable
to
communicate with the
spectrometer