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5 Operating the M8100PM-EXP
This section covers the start-up procedures for operating the flare stack Pilot Monitor after the
unit has been installed in accordance with Chapters 3 and Chapter 4. To provide insight into
the logic behind the procedure, some background on the field operation of the instrument is
provided.
The Pilot (flame) Monitor is designed to continuously monitor the presence of a pilot flame
under varied environmental and changing weather conditions. It reports the presence of a flame
via a 4 mA or 20mA current output; low current signal when Flame is detected, and high level
current (alarm) when No Flame is detected.
Setup of the Pilot Monitor is best performed during adverse weather conditions (cloudy/windy)
so that the adjustments will produce the highest dynamic range. This is achieved by setting the
highest gain without putting the instrument into a self-oscillation condition. The delay setting is
optimized under windy conditions so that false alarms are minimized.
Two possible adjustments enable the operator to optimize instrument performance based on
the environmental and weather conditions of the given installation. The instrument will 'see
through' maximum obstruction when utilizing both of these gains at their highest settings
possible.
•
The System Gain compensates for smaller target at longer ranges.
•
The Climate Compensation set point compensates for adverse weather conditions.
Field experience has proven that dense fog, heavy snow, and severe sandstorms absorb infrared
energy, so closer placement of the instrument may be necessary if setup cannot accommodate
these conditions.
Note: Refer to Figure 8: Instrument Aiming Concepts and Figure 9: Opto-Electronics
Module for the following start-up procedure.
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T QUASAR Flare Monitors Operation Manual
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Operating the M8100PM-EXP • 29
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