Panametrics Sentinel LCT, User Manual

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Sentinel LNG User’s Manual 53
Chapter 3. General Programming
3.9.3 Alarms
1. Select Status, and choose either OFF, Normal, or Failsafe.
a.
OFF - Disables alarm functionality.
b. Normal - Selection for conventional operation.
c. Failsafe - Selection for fail-safe operation.
2. If Normal or Failsafe has been chosen, select Type.
a. Level
Units - Defines the Unit of Measure for the alarm.
Trip Point - Defines the level where the alarm trips.
Dead Band - Defines the amount past the trip point where the alarm resets.
Trip Direction - Defines the direction of the alarm trip, above the set Trip Point or Below the set Trip Point
Error Level -
Reset - Reset would force the alarm state to reset on error or fault condition. Reset would be such that
NO would be NO, unless configured for failsafe.
Trip - Trip would force the alarm to Trip direction on error or fault condition.
Hold Last - Hold Last would hold the current state of the alarm on an error or fault condition.
b. Direction
The alarm can be tripped on forward or reverse flow. It uses volumetric in m
3
/s. The alarm will look for a
positive or negative change in this flow reading.
c. Fault Alarm
Trips the alarm on a particular fault, like E1 or E2. Can configure for individual faults, all faults or flow faults.
3. Choose Latch State
a.
Latch - Enables the alarm to hold its state. This selection causes the User Intervene Indicator to be lit when an alarm
occurs.
b. No Latch - The alarm is reset when the error condition clears.
c. Clear Latch - Changes the latched state. This will turn off the User Intervene Indicator if the meter is no longer
in error.