Related Manuals for Thornwave Labs PowerMon BT-DCPM
Summary of Contents for Thornwave Labs PowerMon BT-DCPM
- Page 1 PowerMon Model: BT-DCPM Bluetooth LE Enabled Advanced Battery Monitor / DC Power Meter – USER MANUAL –...
- Page 2 BRIEF PowerMon (BT-DCPM) is a Bluetooth Smart (LE) Swiss-army knife tool that can be used in any DC circuit. Its primary function is advanced battery monitor / DC power meter. PowerMon allows monitoring of important electrical parameters: two voltages (0-75V), one current (0-60A using the integrated current shunt or up to 10,000A using an external current shunt), peak current, power (W), energy (Wh), battery charge (Ah) and temperature.
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Page 3: Typical Applications
FEATURES • Measures two voltages, one current • Lithium iron phosphate battery charge (unidirectional or bidirectional), peak manager • Timers current, power (W), charge meter (Ah), • Can use an external temperature sensor energy (Wh) and temperature • Operates at up to 75V and 60A of •... - Page 4 TERMINAL DESCRIPTION / INTERNAL DIAGRAM Name Terminal Description GROUND System ground Multi-function (for hardware revision 2.2 and up) – call for details Relay output. It controls a mechanical or solid-state relay. This terminal is RELAY connected to ground internally by the device when the power is turned ON. External shunt connection.
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Page 5: Specifications
SPECIFICATIONS Absolute Maximum Ratings +65V (hw rev 2.00) Maximum voltage at V1 and V2 +75V (hw rev 2.20) Maximum voltage at VS +18V +18V (hw rev 2.00) Maximum voltage at RELAY +30V (hw rev 2.20) Maximum current through RELAY terminal (maximum 0.5A relay coil current) Maximum current through IS+ and IS- (using the... - Page 6 Performance Parameter Value Measured voltage (V1, V2) 0 to 60V (hw rev 2.00) 0 to 75V (hw rev 2.20) Measured voltage accuracy 0.5% Measured current (using integrated shunt IS+, IS-) 0 to 60A Current monitoring accuracy (using integrated shunt) 2% - without calibration 1% - with calibration Integrated current shunt resistance 0.5 mOhm / ±1%...
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Page 7: Compliance Statements
COMPLIANCE STATEMENTS ATTENTION: Changes or modifications not expressly approved by Thornwave Labs Inc could void the user's authority to operate the equipment. ATTENTION: This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference and (2) this device must accept any interference received, including interference that may cause undesired operation. -
Page 8: Safety Instructions
SAFETY INSTRUCTIONS Warning ! Read all the instructions and cautions before using the PowerMon device. Thornwave Labs Inc does not assume responsibility for any injury or property damage caused by improper installation, bad wiring or use of PowerMon outside of its intended purpose. The device should be installed by a professional. -
Page 9: Functional Overview
FUNCTIONAL OVERVIEW Device power. The PowerMon device is drawing its supply power from the V1 terminal and using an internal voltage regulator it creates an internal supply voltage of 9V. This internal supply voltage is available at the VS terminal but should not be used to supply any external load. Attempting to power external loads from VS will damage the device. - Page 10 Radio performance. The device contains an internal Bluetooth Smart (LE) radio operating in the 2.4GHz ISM band and an internal antenna. For best performance, the device should be installed in such a way to offer a path for radio waves to reach it. Metal walls or enclosures can attenuate or completely shield the device. Installation on non-metallic surfaces is preferred.
- Page 11 If wired backwards, use the “Flip Current Sign” option to fix it. WARNING! PowerMon cannot be used as a charge current limiter or LiFePO cell balancer. A properly sized battery charger is required to recharge LiFePO batteries. Thornwave Labs Inc. does not assume any responsibility for expensive battery damage.
- Page 12 Connect Conditions (10 sec. delay used) Disconnect Conditions (2 sec. delay used) battery voltage (V1) less than 3.32V / cell battery voltage (V1) greater than 3.65V / cell charger voltage (V2) at least 0.2V above the battery voltage (V1) charging current (I) less than C/100 or 1 Amp, whichever is greater full charge is detected: battery voltage (V1) greater than 3.5V /cell...
- Page 13 Configuration. The following parameters can be configured using the PowerMon app: Current Sense Voltage Range: The current shunt resistor voltage drop measurement range. This should be adjusted to be higher than the maximum expected voltage drop across the current shunt. Unidirectional (positive current only) Bidirectional (positive and negative current) +160mV...
- Page 14 Low Voltage Disconnect LVD Voltage Source: The voltage used by the low voltage disconnect feature. V1 or V2 can be selected. LVD Connect Threshold: The voltage in volts above which the power relay can re-engage (after the connect filter time has passed). This must be higher than LVD Disconnect Threshold. LVD Disconnect Threshold: The voltage in volts below which the power relay will disengage.
- Page 15 Battery Fuel Gauge Battery Voltage Source: The voltage used by the battery fuel gauge feature. V1 or V2 can be selected. Battery Chemistry: The chemistry of the battery used. Number of Cells: Number of cells of the battery. 12V Lead Acid batteries have 6 cells. 12V LiFePO have 4 cells.
- Page 16 Configuration example. Let’s suppose that current of up to 400A needs to be measured bidirectionally. For this purpose, we will use a 500A / 50mV current shunt. Ohm’s law states: This means that the voltage drop across a resistor is equal to the current passing through that resistor multiplied by the resistance value.
- Page 17 MOBILE APPLICATION – POWERMON The PowerMon device requires a mobile device running Thornwave Labs’ PowerMon app which is available free of charge for both Android and iOS platforms and can be found on Google Play Store and Apple App Store. The mobile device used needs to be equipped with a Bluetooth Smart (LE) adapter. The app will not install on devices that are too old to support Bluetooth Smart (4.0).
- Page 18 Measurement limits. The app allows setting measurement limits. When a measurement value is in between the specified limits it will be displayed with black. If the measurement is outside of the specified limits (less than the low limit or more than the high limit) it will be displayed in red. This feature allows for easy identification of parameters that are not within normal limits.
- Page 19 Battery Fuel gauge. The device implements a fuel gauge functionality for lead-acid, LiFePO and other lithium batteries. When the device is first powered on, the fuel gauge will display “-----” meaning that it is not synchronized with the battery. A full charge is required to bring the SOC in sync with the battery. By tapping on the Battery tab for longer than one second a few options relating to the fuel gauge will be shown.
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Page 20: Wiring Diagrams
WIRING DIAGRAMS... - Page 25 DIMENSIONS Dimensions are in inch.
- Page 26 ORDERING Part Number Description PowerMon - Bluetooth smart DC power meter / battery monitor with BT-DCPM low/high voltage disconnect, over-current disconnect, timers and LiFePO charge manager...
- Page 27 Changelog: Date Revision Description 8/1/2017 Initial preliminary version. 8/7/2017 Added FCC/IC required warnings. 8/9/2017 Revised FCC/IC required warnings. 7/17/2017 Added FCC required statement. 9/6/2017 Added details. Improved manual. Removed “preliminary” watermark. 9/10/2017 Added “Voltage Source” configuration parameter. 9/18/2017 Added “Mobile Application - PowerMon” section. 11/21/2017 Added “Timers”...
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