AW Gear Meters EMO-500 - Manual (Page 20)

EMO-500
Operation and Programming Manual
19

Enter the Ideal Ratio. This number
represents the desired Ratio of Flow
Amount A to Flow Amount B. The
default is 1.00, meaning a 1 to 1 ratio.

Enter the Ratio Warning. This number
represents the percentage of error
between the actual measured ratio
and the desired ideal ratio. The default
is 5%; therefore, if the actual and
measured ratio differ by more than
5%, the Limit 1 relay closes.

Enter the Ratio Alarm. This number
works the same as Ratio Warning
except that after the warning, the
EMO-500 waits for one more sample
amount before closing the Limit 2
Relay if the ratio error is greater than
the programmed percentage. Default
is 10%.
F4
Limit programming.
Off-Ration Warning and Alarm Settings
Since the EMO-500 is primarily a Ratio Monitor, Limits 1 and 2 are factory-set, which an “off” condition
triggers.
Default values are:

Limit 1 = Warning 5%

Limit 2 = Alarm 10%
For example, if you program the RATIO WARNING at +/- 10%, the LIMIT 1 contact closes when this event
occurs. The programmed value similarly activates LIMIT 2 in the RATIO ALARM.
Press key #5 to review the current ratio alarm settings and key #9 to review the limit status. Press either
F3 (Reset A) or F4 (Reset B) to reset off-ratio alarms.
Notice