Setting The Analog Output Ranges; Fixed Range Analysis - Teledyne 3000TA-XL-EU Operating Instructions Manual

Operation
the concentration exceeds the upper limit of the range, the DC output
will saturate at 1 VDC (20 mA at the current output).
However, the digital readout and the RS-232 output of the
concentration are unaffected by the fixed range. They continue to read
accurately with full precision. See Front Panel description in Chapter 1.
The automatic air calibration range is always 0-25 % and is not
programmable.
Web enabled instruments can set and select ranges remotely using a
remote computer. See Section 5.4.

4.7.1 Setting the Analog Output Ranges

To set the ranges, enter the range function mode by pressing the
Range button on the front panel.
Use the ◄► arrow keys to blink the range to be set: low (L),
medium (M), or high (H).
Use the ▲▼ arrow keys to enter the upper value of the range (all
ranges begin at 0 ppm). Repeat for each range you want to set. Press
Enter to accept the values and return to Analyze mode. (See note
below.)
Note: The ranges must be increasing from low to high, for
example, if range 1 is set as 0–100 ppm and range 2 is set
as 0–1,000 ppm, range 3 cannot be set as 0– 500 ppm
since it is lower than range 2.
Ranges, alarms, and spans are always set in ppm units (over the
entire 0-250,000 ppm range), even though all concentration-data outputs
change from ppm units to percent when the concentration is above
10,000 ppm.

4.7.2 Fixed Range Analysis

The autoranging mode of the instrument can be overridden, forcing
the analyzer DC outputs to stay in a single predetermined range.
To switch from autoranging to fixed range analysis, enter the range
function by pressing the Range button on the front panel.
Teledyne Analytical Instruments
L—1 M—10
H—100 Mode—AUTO
3000TA-XL-EU
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