Pro Trio Analyzer Manual
Page
23
NUVAIR
www.nuvair.com
The oxygen calibration value will be the same value of the calibration set when the
instrument is switched on. During the warm up time if the oxygen percentage of the gas
flowing across the sensor is a different value of calibration set in the instrument, a failed
calibration is obtained and the wrong gas percentage will be displayed. Wrong oxygen
analysis may lead to death.
The calibration value of the Pro O
2
alarm is factory set at 21% and any adjustments to
this value will change the analyzers ability to properly ready the % of oxygen in a gas. A
wrong value in this parameter will give a wrong reading of O
2
concentration and the
instrument will not be accurate. All the analysis concentration shown on the display will
be wrong. If you modify this setting you must test the analyzer for accuracy with certified
testing gas. Do not modify this value. Wrong oxygen analysis may lead to death.
9.10 Threshold Alarms
Should the Oxygen reading go over the threshold alarms (AL1 or AL2) the instrument will go into
alarm mode and will activate the (optional) relays output (open collector max 100mA) and the
internal buzzer. The display will show the trespassed alarm and the actual measured value. To
stop the audible alarm, press any key. In this event the Pro O
2
alarm Analyzer will remain in
alarm mode until the analyzed value goes below the alarm.
The relay output typically is used to shut down the compressor. Nuvair can supply the
necessary components to adapt your compressor to the relay or provide them at the time of
install on a new compressor.
9.11 Powering on and warming up
Press the On/Off button for more than one second, until the display shows “on”, after that the
“Att” (wait) message will be displayed for about 4 seconds, then the sensor auto-calibration lasts
about 5 seconds; during this time the display will show the messages ”CAL” and “Att”
alternatively.
Be sure that during this time the sensor is exposed to the gas mix with the oxygen percentage
as programmed in the “O2c” parameter (see programming procedure). By default the parameter
is set at 21% by default that corresponds to the percentage of oxygen in free air, be sure that
the air flow at this time across the sensor is 21% oxygen before turning on the analyzer.
During the warm up time if the oxygen percentage of the gas flowing across the sensor is
a different value of calibration set in the instrument, a failed calibration is obtained and
the wrong gas percentage will be displayed. Wrong oxygen analysis may lead to death.
Summary of Contents for Pro Trio
Page 1: ...User Manual Pro Trio Analyzer O2 CO CO2 Analyzer REV 03 19...
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