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67112
Revision 10
GT SERIES
1 INSTRUMENT, 7 APPLICATIONS
4. Modes of Operation
4.1. Leak Test Mode
This mode is used by technicians to investigate odour or leak complaints and pinpoint leaks.
4.1.1. Available Ranges
• 0 – 2000 ppm Methane. Two options are available:
– 100 ppm dead band
– display PPM only - no values on screen
• 0 – 100% LEL Methane
• 0 – 100% VOL Methane
• 0 – 2000 ppm Carbon Monoxide (CO)
if fitted
.
4.1.2. Features
Leak Test mode features:
• Audible / Visual PPM Ticker (Geiger) alarm
• Ticker threshold adjustment
• Audible / Visual Gas Alarms
• Pump ON / OFF (will stop automatically if flow fault is detected)
• Max Display
• Methane autoranging (ppm to LEL to Vol)
• Display Invert
• Automatic datalogging
• Backlight
• Flashlight
4.1.3. Display
Figure 17: Methane Only Display
Note: The monitor pump must be switched ON to perform correct measurement in
Leak Test mode.