Emerson Rosemount MCL-220 Reference Manual page 41

Reference Manual
00809-0100-3414
Interval timer Any alarm relay can be used as an interval timer.
Rosemount MCL
Figure 6-2: Low Alarm Logic
A. Chlorine, ppm
B. Alarm deactivates
C. Deadband = 0.3 ppm
D. Time
E. Alarm activates
F. Low alarm setpoint
The alarm activates when the chlorine concentration
drops below the low setpoint. The alarm remains
activated until the reading increases above the value
determined by the deadband.
the timer operates. While the interval timer is operating, the main
display, analog outputs, and assigned alarms for the sensor can be put
on hold. During hold, the main display remains at the last value.
Programming the transmitter
May 2019
Figure 6-3 shows how
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