GMI Gasurveyor 500 Series, User Handbook Manual

Page: 17 / 102

1-3
INTRODUCTION
• Audible and Visual alarms. Alarm levels are
pre-set and when on, a periodic confidence signal
is emitted. The confidence audible and confidence
visual signals will provide assurance that the
instrument is sensing for gas without the need for
the operator to constantly view the display. The
signals, which consist of an audible ‘beep’ and a
visual pulse of the LED approximately every eight
seconds, are active in CSM mode and also active
in CGI mode (but for the PPM Flammable range
only).
• Audible and Visual Geiger indication, enabled in
the PPM Flammable range, provides indication of
gas concentration increase via the increased rate
of sounder and LED pulse.
• Manual and automatic datalogging.
• Directly interfaces with the GMI Auto Test
Calibration Systems.