31 Model 7500 Instruction Manual
Teledyne Analytical Instruments
6. SETTING AND CALIBRATION

6.1 Changeover of range

This mode is used to select the ranges of measured
components.
1. During measurement, press the MODE key to display
the User mode.
2. Point the cursor to “Changeover of Range”. Press the
ENT key.
3 The “Channel Selection” screen appears. Press the UP
or DOWN key until the cursor moved selects a desired
CH (component).
4. After selection, press the ENT key.
Note: The range of O2 correction instantaneous values
and O2 correction average values is automatically
switched by changing the range of instantaneous value
of each CH (component).
5. In the Range Setting screen that appears, move the
cursor by pressing the UP or DOWN key to select the
range. (The range with a TRIANGLE mark is currently
selected.)
6. After selection, press the ENT key.
7. Measurement is conducted within the selected range.
The range identication signal (CO) is shorted with the
low range (Range 1), and open with the high range
(Range 2).
Note: If the Remote Range is set to ON, the changeover
of range cannot be performed on the screen.
To close Changeover of range
To close Changeover of range, or cancel the command
midway, press the ESC key. A previous screen will
return.