Bogart Engineering PM-100C PentaMetric Battery Monitor/Meter Computer Interface
The PentaMetric battery system monitor provides comprehensive and flexible battery monitoring for a variety of different types of battery systems which are charged by solar, wind or generators. It is intended to be most useful for systems which are regularly charged and partially discharged, rather than backup power systems that are only rarely called upon to be discharged, such as uninterruptible power systems (UPS).
The system can monitor up to two battery banks simultaneously with a common negative connection. A typical application would be to monitor a lead acid battery system with capacity of from 10 to 10000 amp hours, with system voltage from 12 to 48 volts, with one or more charging systems, such as a solar array, wind power, or generator system, and which is partially discharged daily by loads powered through an inverter. Its purpose is to provide the user with:
The PentaMetric battery monitor system offers a lot more capability than the TriMetric monitor. It measures 1 or 2 battery systems with a common negative. With one battery system, battery current plus two charging sources/loads can be measured.
The Pentametric System consists of these components:
Also Known As:
Real Time Measurement Capability
|Volts||(2 channels) 8-100 volts. For example you can monitor volts from two battery systems. Or battery voltage, plus the solar array voltage if you have a peak power point tracking controller|
|Amps||(3 channels) ±.01-200 Amps (with 100A/100mV shunt).± 0.1-1000 Amps (with 500A/50mV shunt) Each of these requires a separate shunt. There are many different ways these can be used. For example one channel can be used to keep track of battery system energy content and the two remaining ones can be used for separate measurement of two charging sources, such as total solar or wind production. Or two battery systems can be separately monitored if they share a common negative connection--and in addition one charging source could be separately monitored|
|Temperature||-20 to +65 degrees C|
|Secondary Measurements (derived from basic measurements)|
|Amp hour||(3 channels) to ±83,000 Amp-hours|
|Cumulative (negative) Battery Amp Hours|| (2 channels) to -1,000,000 amp-hours|
This measures accumulated amp hours (usually from a battery) only when the amps value is negative. Its purpose is to measure the total cumulative 'wear' of batteries during their lifetime.
|Smoothed (time filtered) Amps|| With time constants of 0.5, 2 or 8 minutes (3 channels)|
±.01-200 Amps (100A/100mV shunt).± 0.1-1000 Amps (500A/50mV shunt) For example, this can be used to show a more accurage estimate of wind charging input when the wind source is varying in speed.
|Smoothed (time filtered) Volts||(2 channels) 0-100 Volts. The smoothed values for both Amps and Volts are used for triggering "alarm" and relay functions so very short term anomolies will be ignored.|
|Watts||(2 channels) ±.01- 20,000 watts|
|Watt-hours||(2 channels) ±21,000 kilowatt hours|
|Battery % Full||(2 channels) 0-100%|
|Days Since Batteries Charged||(2 channels) .01-250 days|
|Days Since Batteries Equalized||(2 channels) .01-250 days|
Data Logging Functions
There are 3 types of data logging functions. With the computer interface all 3 types can be output to spreadsheet file.
2. "Battery discharge voltage profile" data logs volts and amps every time charge level changes by 5% (or 10%) for 1 or 2 battery systems. This checks that battery capacity is still OK--.by observing that battery voltage does not decline excessively as charge level drops.
3. "Battery cycle efficiency data" documents system efficiency for up to 2 battery systems. For each 'charge/discharge' cycle it records: cycle length (hours), total amp hours charged, total amp hours discharged, computed average 'self discharge' current and charge (amp hour) efficiency.
Controls and alarms
Control external relay to go on and off at specified voltage levels and/or %battery state of charge levels. "On" and "off" levels can be independently set.
Audible and visual alarms
Has audible or visual signal for 'Low voltage or low state of charge', 'High voltage', 'battery is charged', 'too many days since charged', and 'too many days since equalized'.