30
PowerScout HD
Meter Configuration
CONFIGURING ALARMS IN VIEWPOINT HD
All PSHD meters can set conditional alarms. Early PSHD meters had a wide variety of alarm types for
voltages and currents and a complex configuration utility to set them. Our customer feedback has been
that only the “Voltage Phase Loss” alarm has been widely utilized. In the spirit of simplification, the
alarm response model has been reduced to “Under-voltage” detection only beginning with firmware
version 2.50. The physical hardware has also been changed from a latching electromechanical relay to
an isolated open collector transistor type. Details about interfacing with this circuit are covered in the
section titled “Alarm Output” later in this manual.
Alarm settings are accessed using ViewPoint HD under the “ALARMS SETUP” drop down list using the
“Extended” filter option in the title bar.
Integer Values can be entered for Voltage Input 1 (PS3HD and PS12HD meters) and Voltage Input 2
(PS24HD and PS48HD meters) for L-N and L-L voltage measurements. Alarms are activated by toggling
the “Enable” button for each voltage reference independently and pressing the “Send to Meter” button.
An example of a 10% drop in a 480 VAC Delta System is shown below. Only Line to Line measurements
are enabled.
Lower Alarm Voltage values can be copied to other voltage references using the “Copy…” button, which
brings up a dialog and allows the user to choose which references to copy. Note that the maximum
value that can be entered into L-N voltage references is 350V and the maximum value that can be
entered into L-L voltage references is 600V. Attempting to enter a value higher into these fields will
result in the software setting each field to its maximum value.
The Alarm Persistence field is user-configurable and the time can be adjusted from 15-60 seconds. The
alarm condition must be continually expressed for the persistence time to trigger the alarm. This
behavior helps reduce false positives on momentary voltage changes or events that cause the meter to
reboot such as changing communication settings.
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