LumaSense Technologies M8100SM-EXP - Manual (Page 45)

E 2 T QUASAR Flare Monitors Operation Manual Operating the M8100SM-EXP 45
7.1.7 Milliamp Output (+mA / -mA)
The milliamp output to the control room is a constant real time (not delayed) monitor. Once
System Gain is setup, the operator will have approximately an 8mA (12mA to 20mA) span
indicating normal flame condition to maximum upset condition.
Check the milliamp output signal at the instrument’s Terminal Output board (+mA, -mA). The
signal should be approximately 12mA when the analog meter is at mid-scale (0.5 volts).
Milliamp checks must be accomplished with a Milliamp meter placed in series with the control
room loop or parallel across the mA+ and mA- terminals when no other connections are on the
terminals.
7.1.8 Final Steps
1. Replace the top cover and the sixteen M8 x 1.25 socket head screws, torque to 30in/lbs.
2. Supply positive air flow and pressure to the air connections.
3. Verify that the temperature of the QUASAR M8100-EXP housing will not exceed 120 °F
(50 °C). If cooling is required, refer to Chapter 3, Mechanical Installation.
7.2 Considerations for the Smoke Monitor
If you are unable to observe a normal operation or experience maximum upset conditions
during installation, the infrared monitor’s nominal setting can be set with the industry-wide
nominal values corresponding to flame color (See Figure 14).
For example, if you only had a blue flame, but normal operating conditions specify blue flame
with occasional faint orange (from pilot only); you could set the M8100SM-EXP Smoke Monitor
to 0.3 on the analog meter (10mA output). The meter and mA values should then be checked
when true normal operating procedures prevail to ensure 0.5 and 12mA readings are observed.
From normal operating conditions to worst case scenario (12 to 20mA), you will have
approximately an 8mA spread available to monitor the flare condition. Should your normal
operating condition permit continuous orange flaring with some observable carbon particulate,
the estimated values in Figure 14 do not apply. Adjust as outlined above.