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DCM100 User’s Manual
Page 8 Revision 1.0
available, you can set this parameter to the estimated battery temperature, between -25°C and
125°C.
2.5.4.11 Time Remaining Floor
The DCM100 calculates the time, given the current being discharged from the battery, before
the battery becomes discharged. By default, the DCM100 considers a battery to be
discharged when its state of charge reaches the “Time Remaining Floor” value, which is by
default set to 50%. If you desire to use some other state of charge value for the “Time
Remaining Floor”, you may change this parameter to the desired value.
2.5.4.12 Time Remaining Averaging Period
If loads on the battery are switching on and off frequently, the battery time remaining value
calculated by the DCM100 can vary significantly. You may change the time over which current
readings are averaged by changing this parameter anywhere in the range of 1 second to 32
minutes.
2.5.4.13 Zero Current Threshold
The current sensor reading can drift slightly at zero current, depending on temperature. Over
a long period of time, this can cause the DCM100 to calculate that a battery is discharging
slowly, even though it is not. The Zero Current Threshold parameter indicates a reading from
the current sensor below which no current is considered to be flowing into or out of the battery.
2.5.4.14 Current Sensor Zero Offset Calibration
The DCM100 is shipped with a Hall-effect current sensor. In order to match the DCM100 unit
and the sensor to one another and ensure maximum accuracy, you should perform this
calibration step while there is no current flowing through the current sensor.
2.5.5 NMEA 2000
®
PGN Enable/Disable
The DCM100 is capable of transmitting two different kinds of NMEA 2000
®
messages (or
PGNs) associated with DC sources and batteries. You may individually enable or disable each
of these messages. You can configure the DCM100 using a Maretron DSM250 display or other
NMEA 2000
®
display unit that is capable of configuring the DCM100. Please refer to the
Maretron DSM250 User’s Manual for details.
2.5.6 Restore Factory Defaults
Selecting this configuration option causes all stored parameters in the DCM100 to be reset to
the values they contained when the unit was manufactured.
3 Output Parameters
The DCM100 outputs a variety of information about the DC source or battery onto the NMEA
2000 network.