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GA0383P02 Rev. C
· AMBIENT ALARM Select this item to change the ambient alarm level. See Setting the
Ambient Alarm Level for more information.
· GENERATOR ALARM Select this item to change the generator alarm level. See Setting
the Generator Alarm Level for more information.
· DIFFERENCE ALARM Select this item to change the difference alarm level. See Setting
the Difference Alarm Level for more information.
· DRAIN WATER This item is to be used for decommissioning the instrument. Select this
item to drain the humidifier. See Draining the Humidifier for more information.
· CHAMBER FLOW ADJ Select this item to adjust the chamber airflow. See Adjusting
Chamber Airflow for more information.
· MONITORING MODE This item is to be used for troubleshooting. When selected, the
GCM-A will display its operation mode. The GCM-A can operate in one of four modes:
Normal Operation, Alternating Operation, Ambient Only and Generator Only. Use the
arrow keys to scroll through the choices and press the ENTER key to select one. See
Normal Operation, Alternating Operation, Ambient Only Operation or Generator Only
Operation for more information.
· START MONITORING This item is displayed when the monitoring is currently turned off.
Select it to turn monitoring on. When selected, the START MONITORING prompt will
flash STARTING for two seconds before monitoring begins. If the FN key is pressed
while it is still flashing, the command will be canceled. See Normal Operation for more
information.
· SET SCROLL OFF This item is displayed when the scrolling is currently turned on.
Select it to turn scrolling off. When scrolling is inactive, the displayed menu items will not
change until a menu key (UP ARROW, DOWN ARROW, FN or ENTER) is pressed.
· SET SCROLL ON This item is displayed when the scrolling is currently turned off. Select
it to turn scrolling on. When scrolling is active, the displayed menu items will change
once every two seconds.
Test Menu
· CONTACT TEST Select this item to start an interactive test of the relay contacts. The
GCM-A will place all relays except one in a de-energized condition. The LCD will display
the name of the single relay that is still energized. Use the arrow keys to change which
relay is energized. Press the FN or ENTER keys to terminate the test.
· KEYPAD TEST Select this item to start an interactive test of the keypad. The LCD will
display the prompt PRESS ANY KEY at the start of the test. Test the keypad by
pressing, one at a time, all of the keys on the keypad, reserving the FN key for last. The
LCD will echo the name of each key as it is pressed. The test will terminate when the FN
key is pressed.
· OUTPUT TEST Select this item to start an interactive test of the bar graphs and four- to
20-milliamp (4-20 mA) outputs. The GCM-A will clear the bar graphs, set the four- to 20-
milliamp outputs to four milliamps and display CURRENT=4mA on the LCD display at
the start of the test. Use the arrow keys to increase or decrease the current in one
(Setup Menu, cont’d)
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