20 • Alarm Points
Model GP-01 Operator’s Manual
Alarm Points
The Model GP-01 allows you to display and set the alarm points. There is a
low alarm point and a high alarm point. Both are rising alarms, meaning
that the alarm condition is triggered when the gas concentration rises to
the alarm point. The alarm point factory settings are summarized below:
The low alarm point can be adjusted between a range of 0% LEL and 50%
LEL. The high alarm point can be adjusted between a range of 10% LEL
and 100% LEL.
Displaying and Adjusting the Alarm Points
1. Make sure the Model GP-01 is turned off. The LCD should be blank.
2. Press and hold the AIR button, then press and hold the POWER/MODE
button.
3. As soon as segments appear on the display (approximately one
second), release the AIR button. When the unit “beeps,” release the
POWER/MODE button to put the Model GP-01 into Alarm Point
Adjustment Mode. The LCD should display the low alarm setting for the
target gas and the battery level.
NOTE: If the LCD should show “CAL” in the lower left corner, the Model
GP-01 is in Calibration Mode. You will need to press and hold the
POWER/MODE button to turn off the unit. Begin again with step 2
above.
4. While the Model GP-01 is displaying the low alarm point, use the AIR
button to change the setting. Pressing and releasing the AIR button in
Table 5: Alarm Points of the Model GP-01
Low Alarm
High Alarm
10% LEL Increasing
50% LEL Increasing
L O
Figure 5: LCD in Low Alarm Point Adjustment Mode
Alarm point
.
10
Battery
level
Rising
Alarm
Alarm
Name
% LEL
