User manual

Smart Interface User Manual
14 IM-SIP-B
Write Low Alarm Set Point Value
The Low Alarm Set Point Value selects the setting where the low
alarm will trip. The valid input range is from 0% to 100% of the
user full scale setting multiplied by the K-factor (set in flow units).
The alarms should have a minimum deadband of 3% to avoid
"chattering." When setting a window alarm, the alarm set points
must be at least twice the deadband value apart. We suggest at least a
10% separation between window alarm set points.
To enter a low alarm set point value:
1. Verify the desired range is selected. Choose the Function Se-
lector and select Write Low Alarm Set Point Value.
2. In the Value to Write selector type in the desired set point di-
rectly in flow units. (The program will automatically correct any
out-of-range settings.)
3. After entering the new value, click the Go button. Check the
Low Alarm indicator and confirm that the new value is correct.
Write Alarm Deadband Value
The alarm deadband value selects the set point value for the high and
low alarm hysteresis. The value entered is a percentage of user full
scale multiplied by the K-factor. Valid input range is from 1% to
10%. A minimum value of 3% is suggested to prevent alarm relay
chatter. This setting is valid for both Range 1 and Range 2.
To enter an alarm deadband set point value:
1. Choose the Function Selector and select Write Alarm Dead-
band Value.
2. In the Value to Write selector type in the desired setting. (The
program will automatically correct any out-of-range settings.)
3. After entering the new value, click the Go button. Check the
Alarm Deadband indicator and confirm that the new value is
correct.
Caution!
The flow meter must
not be reporting or
measuring gas flow
during adjustments.