Teledyne 2120XL - Trace Nitrogen Analyzer User Manual

Page 73

Trace Nitrogen in Argon Analyzer

Operation

Teledyne Analytical Instruments

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 4.5.1.3 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 AL1 is blinking.

Sel Alarm to set

AL1 AL2

Set up alarm 1 by moving the blinking over to AL1 using the

◄►arrow keys. Then press ENTER to move to the next screen.

AL—100.0

m High

Dft—Y Fs—N Ltch—N

Five parameters can be changed on this screen:



Value of the alarm setpoint, AL–1 #### ppb/ppm (nitrogen)



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 N