Teledyne 3010TB - Split architecture trace oxygen analyzer - Manual (Page 48)

4 Operation Model 3010TB
4-20: Part I
Teledyne Analytical Instruments
4.6.2 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
Δ∇ 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—### M—####
H—##### Mode—FX/LO
or
L—### M—####
H—##### Mode—FX/MED
or
L—### M—####
H—##### 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 (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.
4.7 The Analyze Function
When the Analyze function is active, the 3010TB is monitoring the
sample gas currently flowing in the Analysis Unit cell block. All undefeated
alarms are ready to activate should their respective setpoints be crossed.
Press the Analyze button to put the analyzer in the Analyze mode.
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.