Instruction manual

Calibration and Maintenance Fyrite
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INSIGHT
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Plus Manual
94 0024-9487 Rev 2
5.8.3. CO Sensor Span Procedure
Step CO Span Procedure
1 From the Calibration Menu, use the UP () and DOWN () arrow buttons to
highlight CO, and then press ENTER to display the CALIBRATE CO screen.
Note that this requires password validation (see page 55).
“Measured” is the current CO reading, while “Applied” is a known CO level
that will be applied for calibration purposes.
2 Use the UP (), DOWN (), LEFT (), and RIGHT () arrow buttons to enter
an Applied value that exactly equals the concentration stamped on the CO
cylinder.
NOTE: Bacharach recommends using a 500 ppm calibration gas,
however the calibration range is from 20 to 1,000 ppm. An
attempt to calibrate outside this range will cause the message
“Applied Value High” (or Low) to appear at the bottom of the
screen.
3 Attach a 500 ppm CO cylinder to the regulator and connect calibration kit
components as shown below. Apply 500 ppm carbon monoxide in an air
balance calibration gas.
4 Wait until the Measured reading stabilizes and then press ENTER. The
message “Good Calibration” should briefly appear.
If the sensor’s output is low, but still usable, then the message “Good
Calibration WARNING Low Sensor” will appear. The sensor will now be
marked as being Low in the Warm up screen.
If the sensor’s output is too low to be usable, then the message “Bad
Calibration Sensor End of Life, Entry Not Saved” will appear.
5 Close the regulator and remove the CO cylinder.