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340CF ELSD
Section 4 Operation
4-2
other keys. Once the ELSD is powered up the
MENU
|
POWER
key
is used to view error conditions, cycle through the menu, accept
changes to set points, enter standby mode, and turn the power
off.
Error condition exist when the ready light is not illuminated and
when the * appears in the upper right corner of the display. Press
the
MENU
|
POWER
key and a description of the error is displayed
in the window. The display will cycle through all error conditions.
Pressing the
MENU
|
POWER
key once, when no error conditions
exist, or twice times, if an error condition exists, enters the menu
screen.
Pressing the
MENU
|
POWER
key twice, when no error conditions
exist, or three times, if an error condition exists, enters the
stand-by count down screen. Standby mode should be used when
the system is being shutdown. When the detector enters stand-by
count down mode a timer is started. After the time had expired
the gas solenoid is closed, shutting off the flow of the nebuli-
zation gas, the laser is turned off, and the heaters are disabled.
To turn the power off, press and hold the
MENU
|
POWER
key for 5
seconds. Wait at least 10 seconds before turning the instrument
on, after it has been turned off.
4.1.4 Autozero Key
When the
AUTOZERO
key is depressed the ELS Detection signal
will reset to about 20mV. An audible beep is heard when the key
is activated. When the detector is in the menu mode, the
AUTOZERO
functions as an escape key, abolishing any changes
made. The
AUTOZERO
key is also used to reset the status alarm.
4.1.5 Display Screens
The ELSD uses one of four screens to aid in the operation of the
detector:
Startup Screen
The “>” moves from left to the right while the program is loaded.
The process ends when “>” reaches the far right.
After loading the program, the system begins running diag-
nostics. Pressing the
MENU
|
POWER
key exits the start-up process
without completing the diagnostics. If the
MENU
|
POWER
key is
pressed before the completion of the diagnostics, the ELSD
enters a special diagnostic mode.
Program Loading
>>>>>>>>
Running Diagnostics
Checking Laser Power
Содержание 340CF ELSD
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