Ametek Land LANCOM 4 - Page 48

Portable Flue Gas Analyser
User Guide
Lancom 4
10 - 2
Binary mixtures containing the required calibration gas in a balance of
nitrogen are recommended for most species. Calibration gases for NO
2
and
CxHy should be balance Air, not nitrogen.
Thisinformationisprovidedonacerticatewhichaccompaniesthecylinder
and is the value which must be entered into the instrument.
Usuallygascylindersarelledtobetween100and200bar(1450and2900
psi). Using calibration gas at this pressure will cause serious damage to the
instrument. Read the instructions carefully.
A pressure regulator must be supplied to adjust the calibration gas pressure
to 0.7 bar (10 psi).
Use a calibration gas concentration of between 70 and 100% of the gas
sensor range.
For example to calibrate a gas sensor with a range of 0 to 1000 ppm a
calibration gas with a concentration of 750 ppm would be suitable.
Calibration Gas Required
Gas Sensor Typical Calibration Gas
CO (H
2
compensated) 500 ppm CO balance N
2
1000 ppm H
2
balance N
2
CO low 500 ppm CO balance N
2
CO high 1% CO balance N
2
SO
2
500 ppm SO
2
balance N
2
O
2
O
2
*none
O
2
zero gas 500 ppm CO balance N
2
NO
2
100 ppm NO
2
balance Air
NO 500 ppm NO balance N
2
CxHy 2% methane balance Air
H
2
S 25 ppm H
2
S balance N
2
CO
2
5% CO
2
balance N
2
CO
2
zero gas 500 ppm CO balance N
2
* Ambient air is used to calibrate the oxygen sensor.