Instruction Manual

4 Operation Model 2000A-EU
4-18
Teledyne Analytical Instruments
• Value of the alarm setpoint, AL–1 ####
• 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.
• 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.
• Once the parameters for alarm 1 have been set, press Alarms
again, and repeat this procedure for alarm 2 (AL2).
• To reset a latched alarm, go to Dft and then press either ∆ two
times or ∇ two times. (Toggle it to Y and then back to N.)
–OR –
Go to Ltch and then press either ∆ two times or ∇ two times.
(Toggle it to N and back to Y.)
4.6 The Range Select Function
The Range function allows you to manually select the concentration range
of analysis (MANUAL), or to select automatic range switching (AUTO).
In the MANUAL screen, you are further allowed to define the high and low
(concentration) limits of each Range, and select a single, fixed range to run.
CAUTION: If this is a linearized application, the new range must
be within the limits previously programmed using the
System function, if linearization is to apply through-
out the range. Furthermore, if the limits are too small
a part (approx 10 % or less) of the originally linear-
ized range, the linearization will be compromised.
In the AUTO screen, you are further allowed to select which gas applica-
tion (PREVIOUSLY defined in System function) to run.