Open Loop Monitor
The function can be switched ON/OFF. The default setting is OFF. If the function is ON,
there will be an alarm displayed Alarm: Loop in the Main Menu if the loop between A-
OUT connection 1 & 2 is open.
5.4.2 Analog Output 2
The route for setting Analog output 2 is Tools menu\Service (Password level 1:
9490)\Analog in/out settings\Analog output 2.
Analog output 2 (Ao01) is connected to terminal A-OUT connection 4 & 5. Analog out-
put 2 is per default arranged to display the oxygen value just as Analog output 1. The ad-
justment of settings and calibration is done as described in section 5.4.1.
If ordered, Analog output 2 can be set to display Analog input 1 (Ai01). Most settings are
done equivalently to the description in section 5.4.1 with the exception of the manual cal-
ibration of the output signal. If Analog output 2 is connected to Analog output 1 then fol-
low these instructions for a manual calibration of the output signal.
Connect a current meter to terminal A-OUT connection 4 & 5 for measuring the analog
output 2.
For zero calibration:
• Simulate a 4mA current to Analog input 1.
• Select ZeroCalCnt. Then adjust and save the value that corresponds to 4 mA showed
on the current meter connected to the analog output 2
For span calibration:
• Simulate a 20mA current to Analog input 1.
• Select SpanCalCnt. Then adjust and save the value that corresponds to 20 mA
showed on the current meter connected to the analog output 2.
5.5 Back-flushing & Auto Calibration
Not relevant for the Inert Gas Oxygen Analyzer!
The backflushing and auto calibration functions are not used by default for the
Inert Gas Oxygen Analyzer. The parameters in this menu, therefore, must not be
edited.
This section is only valid for the Stack Gas Oxygen Analyzer and the EGR Oxygen
Analyzer.
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