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GX4 GAS MONITOR
SETUP AND OPERATION CONTINUED
Alarm and Auxiliary
Test the alarm and check the status of the auxiliary.
Device Software
Factory reset of firmware settings.
Note: Logs are not erased during a factory reset.
LOW FLOW SET POINT ADJUSTMENT
When the system detects that the air flow rate to the sensors is too low, a warning is triggered
on the monitor and a warning signal is sent through the auxiliary outlet's "Warning Out"
connection, which can be used to trigger an external light tree or other device.
The detected flow rate's accuracy is affected by temperature and ambient air pressure (for
example, due to elevation changes). To ensure that the low flow warning is triggered at the
proper flow rate, the low flow set point should be adjusted according to the below procedures
monthly, and whenever there is a temperature change of more that 30 F (15 C) or an elevation
change of more than 1000ft (300m).
WARNING
To adjust the low flow set point:
1.
Turn on air flow and adjust the inlet pressure to 15-20psi.
a. Check that the flow reading is at least 50. If not, replace the manifold tube.
2.
Turn off/disconnect all air flow to the GX4
3.
Turn on/connect the air flow to normal operating pressure, with all equipment
attached and record the flow reading shown.
4.
If these normal flow and no flow readings are less than 40 points apart, adjust the
inlet pressure closer to 20psi and retest.
5.
Once the readings are at least 40 points apart, change the low flow set point to be
halfway between the two readings. The low flow set point can be adjusted in the
menu at: System Alarms AUX Flow Threshold.
CHANGE GAS CONCENTRATION
The expected gas concentration can now be altered to match the certificate of your gas
bottle. When selecting the gas calibration wizard, select "Edit" then scroll up/down to adjust
the concentration.
The monitor will alter the calibration of the cartridge to meet the expected value. Note, this
will only make minor changes from the original setting.
When starting the calibration validation wizard, you will be prompted, "Re-calibrate sensors
to match gas specification."
If you select "Yes", the cartridge will be adjusted upon completion of each gas test.
If you select "No", the wizard functions normally and only checks the sensors.
Sensors cannot be changed too far from their initial factory calibration and the amount varies by
22
®
An incorrect low flow set point can result in no warning if adequate
air flow is lost, increasing the risk of inadequate protection.
and record the flow reading shown.
®
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