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For the majority of uses, gases will be purchased for calibration at the concentration to be used for the
span calibration, rather than purchased at high concentrations and later diluted using a gas dilution
calibrator. Therefore users may find some restrictions on what concentrations can be provided by
their chosen calibration gas supplier.
For some applications measurements will be made close to the monitor’s maximum detection limit.
For these applications a span point at 80 % of full scale is suggested. For other applications, gas
levels may be important across a broad range rather than just close to the maximum exposure limit.
Other applications may make more use of the lower end of the sensors working range, with higher
levels occurring less frequently and having less importance. The most appropriate span point will thus
depend upon the intended application. If the intended application is not known, Kanomax suggests a
span point at 80 % of full scale. All gases should be purchased in a balance of air.
* The R42 cannot be used for the calibration of NH3 due a material incompatibility. Contact Kanomax
for advice on calibrating NH3 sensor heads.
** Contact Kanomax for information regarding PERC calibration
Kanomax Sensor Head
Suggested span point
80 % Full Scale (in a
balance of air)
Tubing material
for gas
calibration
Carbon Monoxide 0-25 ppm
20
Tygon R-3606
Carbon Monoxide 0-100 ppm
80
Tygon R-3606
Carbon Monoxide 0-1000 ppm (leak)
800
Tygon R-3606
Carbon Dioxide 0-2000 ppm
1600
Tygon R-3606
Carbon Dioxide 0-Model 27500 ppm
4000
Tygon R-3606
Nitrogen Dioxide 0-1 ppm
0.8
PTFE (Teflon)
NH3 0-100ppm
*
NH3 0-1000ppm (leak) *
Hydrogen 0-Model 27500 ppm
4000
H
2
S 0-10 ppm
8
PTFE (Teflon)
H
2
S 0-100 ppm
80
PTFE (Teflon)
Methane 0-10000 ppm
8000
PTFE (Teflon)
Ozone (OZU) 0-0.15 ppm
0.12
PTFE (Teflon)
Ozone (OZL) 0-0.5 ppm
0.4
PTFE (Teflon)
Ozone (OZG) 0-10 ppm
8
PTFE (Teflon)
PERC 0-200 ppm *
SO
2
0-10 ppm
8
PTFE (Teflon)
SO
2
0-100 ppm
80
PTFE (Teflon)
VOC (Isobutylene) 0-25 ppm
20
PTFE (Teflon)
VOC (Isobutylene) 0-Model 2750
ppm
400
PTFE (Teflon)
NMHC (Isobutylene) 0-25 ppm
20
PTFE (Teflon)
PID (Isobutylene) 0-20
16
PTFE (Teflon)
PID (Isobutylene) 0-1000
800
PTFE (Teflon)
Page | 23
Kanomax Gasmaster User Guide
MRK-D-0002 V3