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2.3. Monitor Ranges
The following ranges are available in the GT:
• 0-10,000 ppm Methane
• 0-100% LEL Methane
• 0-100% VOL Methane
• 0-25% Oxygen (O
• 0-2000 ppm Carbon Monoxide (CO)
• 0-100 ppm Hydrogen Sulphide (H
• 0 to 60 in. Water Gauge (0 to 150mBar)
Note: Your GT may not have all ranges fitted.
Note: The GT is calibrated for Methane. PPM & LEL ranges will respond to other
flammable gases but will only detect Methane accurately.
Avoid exposing to flammable gases other than Methane. This can alter the
performance of the flammable sensors and generate faults.
2.4. Modes of Operation
Used by technicians to investigate odour or leak complaints and to
Leak Test:
pinpoint leaks.
Used for confined space pre-entry testing and for personal monitoring in
Confined Space:
areas such as basements.
Barhole:
Used to locate underground leaks. This can be timed or non-timed.
Allows the user to make either CO Direct, Differential CO, or Air Free CO
CO:
readings (if an O
Purge:
Used in gas and air purging applications.
Used to quickly find small fitting leaks using a semiconductor sensor in the
Sniffer:
probe.
Allows the monitor to be used as a manometer to measure appliance,
Pressure:
regulator and system pressure for leaks.
Allows the user to set up and apply gases for Bump Testing and
Bump Test:
automatically log readings. By default, this mode is disabled.
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GT SERIES
1 INSTRUMENT, 7 APPLICATIONS
5
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