Teledyne 3290 - OEM percent oxygen analyzer - Manual (Page 35)

Percent Oxygen Analyzer Operation
Teledyne Analytical Instruments 25
Note: The HI Range value MUST be set at a higher value than
the LO Range value.
4.3.1 HI Range
Setting the HI Range fullscale value defines the LEAST sensitive
analysis range to be used. To set the HI Range:
1. Press the
SET HI RANGE
function button once.
2. Immediately (within 5 seconds) press either the  or  button
to raise or lower the displayed value, as required, until the
display reads the desired fullscale percent value.
4.3.2 LO Range
Setting the LO Range fullscale value defines the MOST sensitive
range to be used. To set the LO Range:
1. Press the
SET LO RANGE
function button once.
2. Immediately (within 5 seconds) press either the  or  button
to raise or lower the displayed value, as required, until the
display reads the desired fullscale percent value.
4.4 Setting the Alarm Setpoints
The alarm setpoints can be adjusted over the full range of the
analyzer (0-25% oxygen content). They are set as a percent of oxygen
content, so that an alarm set to indicate 9.6 on the display will activate at
9.6% O
2
on any O
2
range.
Note: The HI Alarm setpoint MUST be set at a higher alarm
setpoint than the LO Alarm setpoint.
4.4.1 HI Alarm
Setting the HI Alarm sets the concentration ABOVE which the HI
Alarm will activate. To Set the HI Alarm:
1. Press the
SET HI ALARM
function button once.
2. Immediately (within 5 seconds) press either the  or  button to
raise or lower the displayed value, as required, until the display
reads the desired percent concentration.