PEMTECH PT605, Руководство оператора

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Tips on good calibration (for CO2)
In order to perform good calibration, follow the instructions below
5.
Make sure the flow meter is stable and set at 1 SCFH. Not enough pressure on the
calibration gas may cause flow meter to fluctuate and will result in inconsistent flow of gas
through the sensor.
6.
Note the steady change in the sensor signal ( displayed on the last line of the LCD). The
sensor signal should rise as the sensor is exposed to CO2 during the sampling and should
clear to zero state when in purge mode. The typical zero state of a sensor is between 0.35
and 0.5 volts.
Sensor Calibration Error
The unit will display messages if sensor calibration error occurs.
Error Message Description Remedy
Zero too High Sensor is unable to clear Check any blockage on sensor vent
lines. Also check if purging pump
is operating.
Zero too Low Sensor drift below baseline Sensor old or deteriorated. Replace
with new one.
No Span
Or Span too low Sensor was unable to detect any
change
Check the CO2 concentration of the
calibration gas being applied.
Also check the flow meter for
proper flow rate.
Check for possible leaks in the
tubing inside the sampling system.
If problem persists then sensor may
need to be replaced.
If the calibration fails then the analyzer will restore the old calibration data.