Teledyne 3000MA - Paramagnetic oxygen analyzer - Manual (Page 46)

4 Operation Model 3000MA
4-16 Teledyne Analytical Instruments
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—1.00 M—5.00
H—10.00 Mode—FX/LO
or
L—1.00 M—5.00
H—10.00 Mode—FX/MED
or
L—1.00 M—5.00
H—10.00 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 V dc. However, the digital readout and
the RS-232 output continue to read the true value of the oxy-
gen concentration regardless of the analog output range.
4.7 The Analyze Function
Normally, all of the functions automatically switch back to the Analyze
function when they have completed their assigned operations. Pressing the
Escape button in many cases also switches the analyzer back to the Ana-
lyze function. Alternatively, you can press the Analyze button at any time
to return to analyzing your sample.
4.8 Signal Output
The standard Model 3000MA Percent Oxygen Analyzer is equipped
with two 0–1 V dc analog output terminals accessible on the back panel (one
concentration and one range ID). The –MA option also has two isolated 4–
20 mA dc current outputs (one concentration and one range ID).
See Rear Panel in Chapter 3, Installation, for illustration.