Computer Monitor User Manual

Revision 1.2 Page 11
®®
2.5.3 AC Circuit Type
You must configure the ACM100 as to what type of AC circuit connection it is monitoring. The
allowable values for this parameter are as follows:
• Single-Phase (Phase A) – use this value when power is connected via a single hot wire
and a single neutral wire (a typical 110VAC connection in the US).
• Single-Phase (Phase A, B) – use this value when power is connected via the two hot
wires and single neutral wire from a single phase of a transformer (a typical 220VAC
connection in the US).
• Three-Phase (Phase A, B, C) – use this value when power is connected via the three
hot wires and single neutral wire from a three-phase “Wye” connected circuit.
2.5.4 Reset Total Energy Recorded
The ACM100 accumulates the total energy imported from a Utility and exported from a
generator. Select this option to zero the total energy accumulated readings in the ACM100.
2.5.5 Advanced Configuration…
Certain parameters do not normally need to be set in order for normal operation, but are
included in an advanced configuration section for use in special situations.
2.5.5.1 Device Priority
If you have only one ACM100 on a particular AC power source, you should leave the priority
selection at the default value of 0. However, NMEA 2000
®
can provide a unique priority for
allowing multiple, redundant sensors for a single AC power source on a vessel. Redundant
sensors for a single AC power source should have the same device instance number and
different priority selections. If you have redundant sensors on a single AC power source, you
should leave the primary sensor at its default priority value of 0, and program the secondary
sensor with a priority value of 1.
2.5.5.2 V,I,F Damping Period
If you feel that the monitored Voltage, Current, and Frequency parameters are changing too
quickly or too slowly on the display, you can adjust the damping that is applied to the output
readings by adjusting this parameter. The default damping period is 0.5 seconds. You may
change it to a value in the range of 0.2 seconds to 10 seconds.
2.5.5.3 Power Damping Period
If you feel that the monitored Power parameters are changing too quickly or too slowly on the
display, you can adjust the damping that is applied to the output readings by adjusting this
parameter. The default damping period is 5 seconds. You may change it to a value in the
range of 0.2 seconds to 10 seconds.
2.5.5.4 Current Transformer A
If you notice that the current of phase A is negative when it should be positive, or vice-versa,
then the current transformer has been installed backwards. If this happens, then instead of