EONE GCM-X - POWER TEST; RELAY TEST; SYSTEM TEST; VACUUM PUMP TEST

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GA0383P02 Rev. C
milliamp steps. The bar graphs will track the current outputs with four milliamps equal to
zero percent and 20 milliamps equal to 100 percent. Press FN or ENTER to terminate
the test.
· POWER TEST Select this item to test the power supplies. When POWER TEST is
selected, the GCM-A will display the voltage for each power supply in the format
<nominal value>=<present value>. An example for the 5-volt power supply would be
+5 VOLTS =5.1. The GCM-A will scroll through all five power supply voltages. The
voltages are displayed for two seconds apiece.
· RELAY TEST Select this item to test all of the relays. The LCD will display RELAY TEST;
the system will cause each relay to be energized. If no errors are detected, the LCD will
display RELAYS PASS. If an error is detected, the LCD will display the failure mode and
then list the names of the malfunctioning relays. The failure modes are STUCK ON,
STUCK OFF and MISSING.
· SYSTEM TEST Select this item to test the submicron particle detection subsystem. The
submicron particle detection subsystem consists of the inlet manifold, the ambient and
generator airflow meters, the cloud chamber detector, the vacuum pump and the water
level sensors. The GCM-A will annunciate any problems it detects.
· VACUUM PUMP TEST Select this item to start an interactive test of the vacuum pump.
The GCM-A will position the rotary valve to achieve the maximum vacuum for a given
duty cycle at the start of the test. The vacuum can be increased or decreased by
changing the duty cycle. Press the UP key to increase the duty cycle or the DOWN key
to decrease it. The LCD will display the vacuum and duty cycle. Press the FN or ENTER
keys to terminate the test.
· LED RESPONSE TEST Select this item to check the dynamic response of the cloud
chamber optical system. The CPU will pulse the cloud chamber LED to simulate a cloud
obscuration and measure the response. It will display the response in the format
NN@M.M where NN is the response of the electronics and M.M is the LED current in
milliamps. Press the FN key to terminate the test.
View Menu
· VIEW WATER USAGE Select this item to display the GCM-A’s water meter. The water
meter indicates the number of seconds the GCM-A has spent filling the humidifier. The
water meter is cleared by restarting the GCM-A.
· VIEW PHOTOCELL Select this item to display the current through the cloud chamber
LED in milliamperes.
· VIEW PERIOD Select this item to display the cloud chamber sampling state and cycle
count. This is an advanced diagnostic intended for factory use only.
· VIEW LEVEL Select this item to display the output of the cloud chamber and the zone
being sampled at a once/second update rate.
· VIEW VACUUM Select this item to display the vacuum level and vacuum pump duty
cycle. Three numbers are displayed: the peak vacuum present during the expansion
process, the minimum vacuum present during the fill/flush process and the vacuum
pump duty cycle required to maintain these vacuum levels.
(Test Menu, cont’d)