RKI Instruments GP-01 - Manual (Page 15)

Model GP-01 Operator’s Manual Operation • 10
Turning Off the Model GP-01
1. Press and hold the POWER/MODE button for about five seconds to
turn off the unit. The buzzer will sound while the POWER/MODE button
is being pressed before the unit turns off.
2. Release the button when the LCD is blank. The unit is off.
Operation
This section describes the normal operation of the GP-01 in Measuring
Mode and how to display the peak reading. It also covers alarm indications.
Measuring Mode
To put the Model GP-01 in Measuring Mode, assuming the unit is off, press
and hold the POWER/MODE button for three seconds.
Before continuing, it is advisable to perform a fresh-air adjustment in a
fresh-air environment. Making this adjustment ensures accurate gas
readings in the monitoring environment. Refer to “Start Up” for more
information.
In Measuring Mode, the battery level and combustible gas concentration
are displayed on the LCD. The battery icon has four bars visible when the
batteries have a full charge. As the battery charge decreases, the bars will
gradually disappear, one by one.
The combustible gas concentration is displayed below the battery icon as a
percentage of the LEL (lower explosive limit).
Displaying the Peak Gas Reading
As the Model GP-01 samples the combustible target gas in the monitoring
environment, the unit will record the highest combustible gas concentration
that occurred since the unit was turned on. This highest level is called the
peak gas reading.
0
Battery level
Gas concentration
Figure 3: LCD in Measuring Mode
% LEL