Operating manual GPD 3000
Turning on the GPD 3000
As soon as you turn on the GPD 3000 with the On/Off switch, the warm-
up time starts. The sensor requires this time to reach the working
temperature.
During the warm-up time, certain functions of the instrument are
checked. The display will be showing the available sensor (for the ppm
measurement range) and the LED (green and red) light-up alternating.
Afterwards the configuration for gas type, language and battery state
are shown.
The warm-up time will be done when the readiness LED lights-up. In
the ready state a short signal is heard every 20 seconds, indicating that
the instrument is ready to measure. Now you can start measuring.
Zero point
The zero-point is set automatically after the warm-up time, as soon as
the GPD 3000 is ready. This means the GPD 3000 has set the available
surrounding air as zero point.
With the instrument turned on, you may set the zero manually striking
the zero point key, so the present measured value is determined as
zero point.
When the GPD 3000 measures a value below the set zero point, it will
indicate this by means of the blinking readiness LED. Now the GPD
3000 will very slowly counteract this tendency. However, you can also
set the zero point manually by striking the zero point key.
The range, which the GPD 3000 will accept as zero point, is limited; this
means, for instance, that you can’t „suppress“ a concentration of 1Vol%
by striking the zero point key.
Turn light on/off
Short function
When the
Light
function is activated in the menu, you can turn the light
on and off by striking the zero point key (until a signal sound is heard
and the display shows LIGHT).
This function will not be available when it is not activated in the menu
(YES).
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