Teledyne 5000B - Near Infrared Photometer - Manual (Page 52)

3 Operation /Control Unit Model 5000B
3-24 Part I
Teledyne Analytical Instruments
• Latching? Ltch:Y/N (Yes/No).
• To define the setpoint, use the < > arrow keys to move the blinking
over to AL1: ####. Then use the DÑ 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 DÑ 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 D two
times or Ñ two times. (Toggle it to Y and then back to N.)
–OR –
Go to Ltch– and then press either D two times or Ñ 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 throughout the range.
Furthermore, if the limits are too small a part (approx 10 %
or less) of the originally linearized range, the linearization
will be compromised.
3.6.1 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.
Press Range key to start the Range function.