Teledyne 7500ZA - Infrared Gas Analyzer - Manual (Page 52)

Settings and Calibration Model 7500ZA
Teledyne Analytical Instruments 36
6.1.2 Manual Range Mode
The analysis range for the measured component can be switched
manually as follows:
1. (1) Select “MR” as range switch mode,
and then press the ENT key.
2. Using the UP/DOWN keys, move the
cursor to the desired range selection.
The highlighted arrow indicates the
currently selectable range.
3. Select it by pressing the ENT key, and
analysis will be carried out in that
range.
Note: If “RR” or “AR” is selected as range
switch mode, this operation cannot
be performed.
The ranges for O
2
correction
value,O
2
correction average value,
and O
2
average value are
automatically switched according to
the instantaneous value range
switch settings. (Same as for “RR”
or “AR”.)
To return to the previous screen, press the
ESC key. If ESC is pressed in the middle of
an entry or before the ENT key was pressed
to accept a setting, it will reject the current
selection and return you the display to the
previous screen without making the changes .
6.1.3 Range Identification Contacts
The contacts for range identification on each channel are closed
when Range 1 is active, and open when Range 2 is active.
If the measurement value is held by a remote contact input or
during calibration and range switch conditions are met, the contact status
will change only after the hold condition is removed.