F-940 Instruction Manual rev. 11/26/2019
1554 NE 3
rd
Ave, Camas, WA 98607, USA
55
Phone: (360) 833-8835
www.felixinstruments.com
Checking Sensor Signals will check each of
the raw sensor signals on your device. Each of
these values are tested against typical raw
sensor signals when drawing ambient air. At
the completion of the test, the number of errors
found will be reported. If an error is
encountered, a recommended action will be
suggested. In the case of the raw sensor
signal, the diagnoses of an error will result in
the recommendation of checking and possibly
replacing the sensor. Please contact the Felix
Support team if this action is recommended.
Checking Ambient Measurements is the
second diagnostic test. The test checks the
reported concentrations of the device while
measuring ambient air against typical ambient
air gas concentrations. In the case of the
F-940, the reported concentrations must fall
within the specified ranges reported below.
Sensor
Minimum
Concentration
Maximum
Concentration
C
2
H
4
0 ppm
1 ppm
O
2
19.5%
22%
CO
2
0.02%
0.08%
If any of the reported concentrations fall
outside of these values, an error will be
detected. The diagnostic test will identify the
sensor that did not pass and make the
recommendation to zero or calibrate the failed
sensor.
Summary of Contents for F-940
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