Teledyne BDS-3000 - Oxygen analyzer - Manual (Page 70)

Operation BDS 3000
Teledyne Analytical Instruments 56
4. Are either of the alarms to be defeated?
The defeat alarm mode is incorporated into the alarm circuit so
that maintenance can be performed under conditions which
would normally activate the alarms.
The defeat function can also be used to reset a latched alarm.
(See procedures, below.)
If you are using password protection, you will need to enter your
password to access the alarm functions. Follow the instructions in
section 4.3.3 to enter your password. Once you have clearance to
proceed, enter the Alarm function.
Press the ALARM button on the front panel to enter the Alarm
function. Make sure that AL–1 is blinking.
AL—1 AL—2
Choose Alarm
Set up alarm 1 by moving the blinking over to AL–1 using the __
arrow keys. Then press ENTER to move to the next screen.
AL—1 10.000 ppm HI
Dft—N
Fs—N Ltch—N
Five parameters can be changed on this screen:
• Value of the alarm setpoint, AL–1 #### ppm (oxygen);
value can be set from 0 to 999 ppb + 1.000-1000.00 ppm.
• Out-of-range direction, HI or LO
• Defeated? Dft–Y/N (Yes/No)
• Failsafe? Fs–Y/N (Yes/No)
• Latching? Ltch–Y/N (Yes/No).
• To define the setpoint, use the < > arrow keys to move the
blinking over to AL–1 ####. Then use the __arrow keys to
change the number. Holding down the key speeds up the
incrementing or decrementing. (Remember, the setpoint units
are ppm O
2
).
• To set the other parameters use the __ arrow keys to move the
blinking over to the desired parameter. Then use the __ arrow keys
to change the parameter.