Satec Expertmeter EM720 Operation Manual page 78

Chapter 5 Configuring the EM720
Parameter
Debounce time
Fault Recorder
Debounce Time
Triggering the Fault Recorder through Digital Inputs
78
Options Default
1-1000 ms 10 ms
Checked Unchecked
Unchecked
The debounce time is assigned to digital inputs in groups
of 2 adjacent inputs. So, DI2 has the same debounce time
as input DI1, while DI2 and DI3 are allowed to have
another debounce time setting. When you change the
debounce time for one digital input, the same debounce
time is automatically assigned to the second input related
to the same debounce group.
Check the Fault recorder boxes for digital inputs you wish
to use as triggers for the Fault recorder.
When an open-to-closed state transition is detected on the
digital input, the global "External Trigger" event is
generated in the meter. If the external triggers are
enabled in the Fault recorder (see
Recorder), it triggers the recorder to record waveforms or
RMS data profile for the event.
When a number of digital inputs linked to the Fault
recorder are operated at the same time, only the first
triggers the Fault recorder and logs a fault event into the
Fault log file. The next external fault event is not triggered
until all digital inputs linked to the Fault recorder are
released. This does not affect operations of the internal
analog fault triggers that work independently.
Notice that the "External Trigger" event can also be tested
through the control setpoints from the "Static Events"
trigger group to trigger another action on your selection.
The amount of time while the state of the
digital input should not change to be
recognized as a new state. Too low
debounce time could produce multiple
events on the input change.
When the box is checked, a positive
transition on the digital input (open to
closed transition event) triggers the Fault
recorder.
EM720 Power Quality and Revenue Meter
General Meter Setup
Description
Configuring the Fault