3-6
AUTO BUMP / CAL STATION - HANDBOOK
The test times can be set from 15 to 60 seconds, as illustrated
in Fig. 3-7.
To edit test time, position cursor on value required then left
click mouse button to conrm.
3.1.2 Full Bump Test (Factory Default)
This feature is the factory set default option and provides the
user with the ability to perform a full bump test then, if selected
as illustrated in Fig. 3-8, follow up with an automatic calibration
of failed gas ranges, if applicable.
Fig. 3-8 Default Selection
When gas is applied, using the GMI Test Gas Cylinder (Part
No. 99146), for a pre-set 60 seconds and when the instrument
tolerance band listed below, is reached for each gas range,
the Bump / Cal Station will record a ‘Pass’.
The instrument default gas range tolerances are as follows:
LEL hydrocarbons: 45% to 62%
Oxygen (O
2
): 18.5% to 17.5%
Carbon Monoxide (CO): 450ppm to 550ppm
Hydrogen Sulphide (H
2
S): 45ppm to 55ppm
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