Teledyne 3000TA-XLEU - Trace oxygen analyzer - Manual (Page 75)

Trace Oxygen Analyzer Operation
Teledyne Analytical Instruments 59
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.
Use the ◄► arrow keys to move the blinking over AUTO .
Use the ▲▼ arrow keys to switch from AUTO to FX/LO , FX/MED , or
FX/HI to set the instrument on the desired fixed range (low, medium, or
high).
L—1 M—10
H—100 Mode—FX/LO
—or—
L—1 M—10
H—100 Mode—FX/MED
—or—
L—1 M—10
H—100 Mode—FX/HI
Press Escape to re-enter the Analyze mode using the fixed range.
Note: When performing analysis on a fixed range, if the oxygen
concentration rises above the upper limit (or default value)
as established by the operator for that particular range, the
output saturates at 1 VDC(or 20 mA). However, the digital
readout and the RS-232 output continue to read the true
value of the oxygen concentration regardless of the analog
output range.
4.8 The Analyze Function
Normally, all of the functions automatically switch back to the
Analyze function (Analyze mode) when they have completed their
assigned operations. Pressing the Escape button in many cases also
switches the analyzer back to the Analyze function. Alternatively, you
can press the Analyze button at any time to return to analyzing your
sample.