Heath Consultants Gasurveyor 500 Series - Manual (Page 63)

C-5
Gasurveyor 3-500 - Operating Instructions
Next, the instrument
indicates, as month and
year, when the next
calibration is due.
(February 2002 in
example)
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This display screen is followed by the current gas detection reading.
Note: When in Purge
mode, the PURGE flag
is activated on the
display, as shown:
Pump ON / OFF
A single press of Button One when the pump is running turns the
pump off and stops sampling. A further press of Button One turns the
pump back on.
Clearing Alarms
The Gasurveyor 3-500, by default, has the alarm function on the flammable
range disabled.
If the alarm function is enabled, the instrument has the facility to have
either latching or non-latching alarms.
Non-latching alarms clear automatically when the detected gas level falls
below the threshold set in the instrument.
Latching alarms are cleared manually by a double press of Button Two
, after the detected gas level has fallen below the threshold set in the
instrument.
Switch OFF
A double press of Button One turns the instrument Off.
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Eng
lish