NDIR Gas Analyzer
Operation 4
Teledyne Analytical Instruments., - Rev. 3
39
4.3 The MODE Menu
Operational parameters of the analyzer are established through the
MODE menu. From the MODE menu you can:
•
Initiate a calibration (zero, span, or both).
•
Set which user-defined or default chart range to use, or let the
instrument select the range automatically using the auto-
ranging feature.
•
Select the amount of filtering to be applied to the measurement.
•
Select whether the instrument tracks the gas reading during a
calibration or holds the last reading prior to the calibration
cycle.
•
Select whether the readings are linearized or nonlinearized.
•
Set the contrast of the display.
•
Toggle the alarm feature on or off.
• Select either a full (zero and span) or zero only automatic
calibration.
The MODE submenus are displayed and their functions are set in the
same manner as the SETUP features were:
hold
in the MODE button and
use the UP and DOWN button to select the appropriate value or selection.
Releasing the MODE button and pressing it again brings you to the next
submenu. Figure 4-1 shows the MODE submenus in the order in which
they will appear on screen.
1.
C
ALIBRATE
The first submenu of the MODE menu is the CALIBRATE
submenu. It allows the operator to initiate a calibration event.
The operator can select either a zero, span or full calibration
(zero and span). The calibration event will begin after a delay
as defined in the SETUP/CAL DELAY submenu. See Section
4.2
SETUP Menu
and Section 5
Calibration
.
•
Select the calibration event.
Press the UP button
(UPS) to select a span calibration. Press the DOWN
button (ZRO) to select a zero calibration. Press the
SETUP button to select a full calibration (both zero and
span).