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WatchGas is dedicated to continuously improving its products. Therefore, the specifications and features mentioned in this datasheet are subject to change without prior notice.
WatchGas Application Note 6 Part 2: WatchGas QGM Calibration v1.1 19-01-21
© 2021 WatchGas B.V.
This document describes the preferred calibration procedure of the WatchGas QGM. If you require any assistance, feel free
to contact us at [email protected]
Equipment
To calibrate the WatchGas QGM the follow equipment is needed:
• WatchGas QGM
• WatchGas QGM Calibration adapter
• 0.5 L/min regulator
• Last-O-More hose
• WatchGas IR link (optional)
• Calibration gas
The use of the WatchGas IR link and IR link software is not required, but it’s certainly recommended. Span values can
only be changed using the IR link software.
The WatchGas QGM can only measure O
2
, LEL, CO and H
2
S. Please refer to our well-priced list of calibration gases.
Note that these gases are available in a multi-gas mixture. Calibrating using a multi-gas mixture is most cost and
time efficient.
Adequate safety measures should be taken when working with these type of gases. Avoid personal exposure at all
times by working under a fume hood and/or wearing personal protective equipment.
List with commonly used calibration gases
Description
Size
Article Number
18%O
2
/ 2.2%CH
4
/ 50CO / 10H
2
S in N
2
116L
CAL-C017064
18%O
2
/ 2.2%CH
4
/ 50CO / 10H
2
S in N
2
34L
CAL-C009147
18%O
2
/ 2.5%CH
4
/ 2%CO
2
/ 50CO / 15H
2
S in N
2
58L
CAL-C015013
100ppm I-C
4
H
8
in Air
34L
CAL-C008920
100ppm I-C
4
H
8
in Air
116L
CAL-C006392
18%O
2
/ 2.2%CH
4
/ 50CO / 10H
2
S in N
2
58L
CAL-C011916
18%O
2
/ 2.2%CH
4
/ 0.5%CO
2
/ 100CO / 25H
2
S in N
2
58L
CAL-C012017
18%O
2
/ 2.5%CH
4
/ 100CO / 25H
2
S in N
2
34L
CAL-A1069841
100% N
2
(UHP)
116L
CAL-A0961956
18%O
2
/ 2.2%CH
4
/ 0.5%CO
2
/ 100CO / 25H
2
S in N
2
34L
CAL-C009266
100ppm I-C
4
H
8
in Air
58L
CAL-C015004
50ppm NH
3
in N
2
58L
CAL-C011793
20.9% / 1.1%CH
4
/ 200ppm CO in N
2
116L
CAL-C019604
15%O
2
/ 1.45%CH
4
/2.5%CO
2
/ 60CO / 20H
2
S in N
2
58L
CAL-C012032
18%O
2
/ 2.2%CH
4
/ 100CO / 25H
2
S in N
2
58L
CAL-C011921
15%O
2
/ 1.45%CH
4
/ 60CO / 20H
2
S in N
2
34L
CAL-C009154
18%O
2
/ 2.2%CH
4
/ 100CO / 25H
2
S in N
2
34L
CAL-A0915728
18%O
2
/ 2.2CH
4
/ 50CO in N
2
116L
CAL-A0975762
10ppm H
2
S in N
2
116L
CAL-C017065
25ppm H
2
S in N
2
58L
CAL-C011126
WatchGas QGM Calibration
Application Note 6 Part 2
