Teledyne 3010MA - Paramagnetic oxygen analyzer, includes 0-100% range - Manual (Page 55)

Paramagnetic O2 Purity Analyzer Operation
Teledyne Analytical Instruments 55
To set the other parameters use the < > arrow keys to move the
blinking over to the desired parameter. Then use the
 arrow keys to
change the parameter.
Once the parameters for alarm 1 have been set, press Alarms again,
and repeat this procedure for alarm 2 (AL–2).
To reset a latched alarm, go to Dft– and then press either
 two times
or
 two times. (Toggle it to Y and then back to N.)
–or –
Go to
Ltch– and then press either  two times or  two times.
(Toggle it to N and back to Y.)
4.6 The Range Function
The Range function allows the operator to program up to three
concentration ranges from 0 to 100% oxygen in increments of 1%. Only
the lower value of the range is adjustable. The upper range value for all
three ranges on the Oxygen Purity Analyzer is non-adjustable and fixed at
100%. The lower value can be adjusted anywhere form 99% to 0%. Once
set, the ranges will correlate with the DC analog outputs. If no custom
ranges are defined by the user, the instrument defaults to:
Low = 0–100 %
Med = 95–100 %
High = 98–100 %.
The ranges must be set for increasing concentration, that is, the lower
value on range 1 must be set less than that of range 2. Similarly, the lower
value of range 2 must be less than that of range 3.
The Model 3010MA is set at the factory to default to autoranging. In
this mode, the microprocessor automatically responds to concentration
changes by switching ranges for optimum readout sensitivity. If the
current range limits are exceeded, the instrument will automatically shift
to the next higher range. If the concentration falls slightly below full scale
of the next lower range, the instrument will switch to that range. A
corresponding shift in the DC percent-of-range output, and in the range ID
outputs, will be noticed.
The autoranging feature can be overridden so that analog output stays
on a fixed range regardless of the oxygen concentration detected.
Note: If the concentration exceeds the upper limit of the range, the DC
output will saturate at 1VDC.