Setting the Alarm Setpoints, HI Range, LO Range

Trace Oxygen Analyzer	Operation

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.

4.3.2LO 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.

4.4Setting 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.

4.4.2LO Alarm

Setting the LO Alarm sets the value BELOW which the LO alarm will activate. To set the LO Alarm:

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