Teledyne 3190Z - Zirconium oxide trace oxygen analyzer - Manual (Page 27)

Trace Oxygen Analyzer Operation
Teledyne Analytical Instruments 19
4.3.1 HI Range
Setting the HI Range full-scale 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
Δ or ∇ button
to raise or lower the displayed value as required, until the
display reads the desired full-scale concentration.
4.3.2 LO Range
Setting the LO Range full-scale 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
Δ or ∇ button
to raise or lower the displayed value as required, until the
display reads the desired full-scale concentration.
4.4 Setting the Alarm Setpoints
The alarm set-points can be adjusted over the full range of the
analyzer (0-1,000 ppm oxygen content). The set-point values are
expressed in ppm only.
Note: The HI Alarm set-point MUST be set at a higher
concentration than the LO Alarm set-point.
4.4.1 HI Alarm
Setting the HI Alarm sets the value ABOVE which the HI Alarm
will activate. To Set the HI Alarm:
1. Press the SET HI ALARM function button once.
2. Within 5 seconds press either the
Δ or ∇ button to raise or lower
the displayed value as required, until the display reads the
desired concentration.
4.4.2 LO Alarm
Setting the LO Alarm sets the value BELOW which the LO alarm
will activate. To set the LO Alarm: