Teledyne 3010MA, Operating Instructions Manual

Page: 56 / 88

Part 1 Control Unit Model 3010MA
Teledyne Analytical Instruments
56
Use the
∆∇
arrow keys to enter the upper value of the range (all
ranges end at 100 %). 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 95-100 % and range 2 is set as 98-100 %, range 3
cannot be set as 96–100 % since it is lower than range 2.
4.6.2 Autoranging Analysis
Set your analysis ranges as in 4.6.1, above. Leave Mode in Auto, or
use the arrow buttons to change back to
Auto
.
4.6.3 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—95.00 M—96.00
H—98.00 Mode—FX/LO
or
L—95.00 M—96.00
H—98.00 Mode—FX/MED
or
L—95.00 M—96.00
H—98.00 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 100% O
2
upper limit (default value) the output saturates at
1 V dc. If the reading goes below the minimum range value (or 95% O
2
) the output voltage will drop to zero V dc 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. Oxygen values
below 95% or above 100% should not be considered valid.