Teledyne 6600 User Manual
Page 48
3 Operation
Model 6600
3-24 Part I
Teledyne Analytical Instruments
Use the
UP/DOWN to choose the alarm again. Then Enter to move to
the next screen.
AL1: 1ØØØ ppm HI
Dft:N Fs:N Ltch:N
Five parameters can be changed on this screen:
•
Value of the alarm setpoint, AL1: ####
•
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 UP/DOWN switch to change the
number. Holding down the key speeds up the incrementing or
decrementing. Enter when done, blinking cursor moves to the
next field.
•
To set the other parameters use the UP/DOWN key, and then
Enter to move to the next field..
•
Once the parameters for alarm 1 have been set, Enter the Alarms
function
again, and repeat this procedure for alarm 2 (AL2).
•
To reset a latched alarm, go to
Dft– and then toggle either Up or
DOWN two times. (Toggle it to
Y and then back to N.)
–OR –
Go to
Ltch– and then toggle either UP two times or DOWN two
times. (Toggle it to
N and back to Y.)
3.6
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.