Turning On the Device
To activate, press and hold down the power button for 5 seconds. Once the
device is activated, the start-up sequence will display the following behavior:
1. Power LED is green and begins to flash slowly.
2. Audible Alarm beeps once.
3. Flow LED is green and begins to flash slowly.
For flow, power and charging status, refer to
LED Indicators
section.
Blocked Flow Test
Before each day’s use, conduct a blocked flow test to ensure the pump is fully
operational. With the power on, block the free end of the sampling hose which
is attached to the gas inlet port. The device will display the following behavior:
1. Pump motor shuts down.
2. Audible alarm beeps continuously indicating a flow fault.
3. Flow LED turns red and flashes quickly.
Upon successful completion of the blocked flow test, press the power button
to reactivate the device.
Bump Test
Before each day’s use, complete a bump test of the detector connected to
the
GCT External Pump
. Refer to the
GCT External Pump User’s Manual
for
instructions.
Turning Off the Device
Press and hold down the power button for 5 seconds until the 3 LEDs (power
LED, flow LED, charging LED) turn off, then release the button.
In the event of a low battery warning, exit the
work area immediately since the GCT External
Pump could turn off at any time.
Low Battery Warning
A fast, red intermittent flash of the power LED
with the audible alarm beep every 10 seconds
indicates that (on average) 20 minutes
of operation remains. However, the time
remaining can vary due to several different
factors.
