OperationMSA
ALTAIR 4X
GB
43
If a sensor is nearing its end of life, this "SPAN PASS" indication will be followed by
the end of sensor life warning [ symbol]. The symbol, along with the gas type of
the sensor nearing its end of life, will blink for 15 seconds when the device returns
to measure mode. When in measure mode, the symbol is continuously displayed.
Finishing Calibration
(1) Close the valve on the regulator.
(2) Remove the calibration cap.
The calibration procedure adjusts the span value for any sensor that passes the ca-
libration test; sensors that fail calibration are left unchanged. Since residual gas
may be present, the device may briefly go into an exposure alarm after the ca-
libration sequence is completed.
Autocalibration Failure
Span calibration is unsuccessful:
- If the instrument cannot calibrate one or more sensor(s), it goes to the
SPAN ERR page and remains in alarm until the button is pressed.
- A sensor life indicator is displayed [Alarm symbol and symbol] to show the
sensor has reached its end of life and should be replaced.
This occurs if the span calibration is unsuccessful twice.
- The device will remain in alarm state until the button is pressed.
- The Alarm symbol and symbol will remain on the display until a successful
calibration or sensor in question is replaced.
- After the SPAN calibration com-
pletes, the device momentarily
displays “SPAN PASS” or
“SPAN ERR” along with the label of
any sensor that failed then returns
to the Measuring mode.
COMB/EX
O2
H2S
CO
COMB/EX
O2
H2S
CO
A span calibration can fail for many reasons besides sensor at the end
of his life. If a span calibration failure occurs, items such as remaining
gas in the calibration cylinder, gas expiration date, security of the cali-
bration cap, etc. should be verified and calibration should be repeated
prior to replacing the sensor.
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- info@fasit.it
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