Maretron ACM100 AC Circuit Type, Reset Total Energy Recorded, Advanced Configuration…, Revision

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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

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