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Infrared Gas Analyzer Operation 4
4-23
Teledyne Analytical Instruments
the number. Holding down the key speeds up the incrementing or
decrementing.
• After the number (value) has been choosed, use Enter to move
the desired parameter. Then use the UP/DOWN keys to change
the parameter.
• Once the parameters for alarm have been set, Enter the alarm
function again, and repeat this procedure for next alarm.
• To reset a latched alarm, go to Dft and then use either UP two
times or DOWN two times. (Toggle it to Y and then back to N.)
–OR –
Go to Ltch and then use either UP two times or DOWN 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 application
(PREVIOUSLY defined in
APPLICATION
function) to run.
4.6.1 Manual (Select/Define Range) Screen
The Manual range-switching mode allows you to select a single, fixed
analysis range. It then allows you to redefine the upper and lower limits, for the
range.
Use UP/DOWN key to start the RANGE function, and ENTER
Select range
mode: MANUAL