6.2. Zero Calibration
Under some circumstances the sensors may temporarily exhibit a baseline reading higher than zero
due to insufficient warm up or cross-sensitivity to other gases. In this case it is also worthwhile
checking against a standard zero air source.
1.
Follow the initial set up instructions in 6.1
2.
Flow zero air until the reading stabilises (about 10 minutes)
3.
Initiate Zero Calibration on the Kanomax Gasmaster by:
•
Model 2710:
Press and hold the “enter” button until the word “Zeroing” appears next to
ZERO CAL. The routine will run for up to ten minutes (depending on the gas sensor
installed) and then beep to indicate completion.
•
Model 2750:
: Enter the CALIBRATE menu by pressing the “mute” and “scroll down”
buttons for 2 seconds.
From here select “ZERO CAL” then:
o
Single gas heads
: Toggle YES/NO using scroll button to YES then press enter.
The word “Zeroing” appears and the zero routine will run for up to ten minutes
(depending on the gas sensor installed) and then beep to indicate completion.
o
Multi-gas sensor heads and T/RH probe:
Press enter to bring up the OFFSET
for the Sensor head. Use the scroll buttons to change the OFFSET and enter
button to accept. Calculate the new OFFSET using the equation below:
New OFFSET = Sensor Reading/GAIN + old OFFSET
Note 1: The Model 2710 can only zero calibrate single gas sensors.
Note 2: Temp/RH offsets are stored on the handheld rather than on the sensor. All other
offsets are stored on the sensors.
6.3. Span Calibration
Span calibration is only available on the Model 2750. It provides an option to adjust the GAIN of
Kanomax sensor heads. There are no optimum span concentrations for calibrating Kanomax sensor
heads. There are however a few considerations which can guide the decision as to which span
concentration is most appropriate.
1
2
3
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Kanomax Gasmaster User Guide
MRK-D-0002 V3
