Powerwerx BSM-500 Precision Battery Status Monitor User Manual
- June 10, 2024
- Powerwerx
Table of Contents
BSM-500 Precision Battery
Status Monitor
User Manual
Introduction
The Powerwerx BSM-500 is a precision battery status monitor that acts like a fuel gauge for your battery. The meter accurately measures your batteries state of charge (SOC) and will display your current battery capacity (Ah remaining). The meter will also show Battery Percentage, Remaining Time (to full Charge or Discharge), Volts, Amps, and Watts. The BSM-500 can be used with Lithium Iron Phosphate, Lithium, Lead Acid, AGM, and Nickel Metal Hydride batteries with a voltage range of 8-80V.
Wiring Instructions
- Begin by connecting the B- terminal on the shunt to the negative (-) terminal on your battery. Next, you will attach all negative loads and charging sources to the P- terminal of the shunt. It is important that all current, including charging currents, flow through the shunt and are connected direct to the P- terminal. Any loads or charging currents connected direct to the batteries negative (-) terminal will not be measured by the shunt.
- Install a series connection (18-22AWG) from your batteries Positive (+) terminal to the B+ terminal on the shunt. This connection is what will power the display.
- Connect the shielded data cable to the data connectors on the shunt and the rear of the display monitor. The meter will immediately power on if installed correctly.
100A/350A Shunt Wiring Diagram
WARNING: The shunt is to be wired as shown in the diagram only. Make sure to
thoroughly follow all wiring instructions. Wiring the shunts B- or P- terminal
direct to a Positive (+) circuit can cause irreversible damage to the BSM-500,
and could cause permanent damage to your battery and/or equipment.
Battery Parameter Setup
After you have installed the shunt and have connected your display, you are now ready to enter battery parameter settings:
- Press and hold to access the battery parameters screen.
- Use / to select which parameter you plan to update.
- Press and hold . The first numeral will begin to flash, and you can input the correct amount. Press to move to the next numeral to the right. You will then use / to increase or decrease that value. When you are finished inputting that value, press and hold .
- You can then proceed to updating the next value. When you have completed updating values, to return to main screen you can press and hold or wait for 60 seconds, and the meter will return to the main screen.
CAP: Battery Capacity
in Amp Hours (Ah)
FULL V: Battery Voltage when the battery is charged to 100%
EMPTY V: Battery voltage where your capacity is considered to be 0%.
CHECK YOUR BATTERY MANUFACTURERS
RECOMMENDED LOWEST OPERATING BATTERY VOLTAGE (You can always set this
parameter slightly higher to help prevent discharging your battery too low).
Power Off: The backlight and LCD display will turn off when the voltage
drops below this value.
Alarm: Low battery capacity indicator. The battery capacity value will
begin flashing when the batteries capacity drops below this value.
Atten: Battery attenuation ratio. Does not need to be programmed.
Battery Capacity Confirmation
The final step is to confirm your batteries capacity. If your battery is
relatively new, proceed to charge your battery until full. Once the battery is
fully charged, you will then proceed to press and hold . This will confirm the
batteries capacity, and the unit will be fully programmed and ready for use.
If the capacity of your battery is unknown, or if the battery is older and has
several hundred charge cycles, then you will need to measure the batteries
current capacity. To do this, you will first need to discharge your battery
until it is at 0% capacity (REFER TO YOUR BATTERY MANUFACTURERS
SPECIFICATIONS). Next, proceed to press and hold . This will set the current
capacity as your batteries baseline for 0%. You will then proceed to charge
your battery up to a full state of charge. After your battery is charged, you
will then want to compare the measured Ah capacity to your batteries
advertised capacity. If the measured value is close to the advertised capacity
of your battery, then you can press and hold and set this as your batteries
fully charged capacity. If you have a large difference from the advertised Ah,
then you will want to update the battery capacity (CAP) to match the measured
Ah capacity. After you have updated the CAP, you can then press and hold to
confirm this as your batteries new full state of charge. Your meter is now
ready for use.
Low Battery Voltage Mode
The low battery voltage setting can be used to minimize the amount of power
consumed by the display. The display backlight and LCD display will turn off
when your batteries voltage drops below the value entered for PowOff. To turn
the screen back on momentarily you can press any of the buttons on the right.
The screen will not return to normal function until the battery’s voltage
increases above the PowOff setting. To disable this function, set the PowOff
value to 0 Volts.
Battery Capacity Alarm
The battery capacity alarm acts as an early warning when your batteries
capacity is getting too low. When your batteries remaining capacity drops
below the value entered in the Alarm setting, the capacity value on the
display will start flashing. The value will stop flashing when the battery has
been charged, and the capacity is higher than the entered Alarm value. To
disable this function, make sure that the value for Alarm is set to 0 amp
hours.
Display Parameters
- Percentage (%) – The percentage will display your batteries current state of charge (SOC). Percentage is displayed from O% (empty) to 100% (full).
- Amp Hour (Ah) – The present state of charge (SOC) calculated in Amp Hours (Ah). NOTE: The capacity of the battery being monitored will need to programmed prior to use.
- Battery Symbol (battery cell symbol) – The battery symbol is metered as a graph for current state of charge (SOC).
- Timer – The timer will indicate the remaining amount of time left until zero capacity based off the current rate of discharge. When charging, the timer will indicate the amount of time left until full state of charge.
- Volts (V) – Indicates the current battery voltage.
- Amperage (A) – Shows the current amperage being used for discharge, or the charging current being supplied.
- Watts (W) – Shows the current watts being used for discharge, of the charging wattage being supplied.
Display Screen
Back Light
The display screen backlight serves as an indication if your battery is
charging or discharging. Upon powering up the meter the Blue backlight will
turn on. If there is no charging or discharging current, then the backlight
will turn off after 5-7 seconds. The backlight will turn on, and will remain
on, when the shunt detects a load and the battery is being discharged. When
the battery senses a charging current, the backlight will then begin to slowly
pulse on and off while a charging current is detected. EXCEPTION: If
charging and discharging is happening at the same time, then the higher
current of the two will determine if the screen remains solid or pulses.
Backlight Brightness
The backlight brightness can up adjusted up or down at any time by pressing or
.
Specifications
Operating Voltage: 8-80VDC
Standby Current (backlight on): 6.0mA
Standby Current (backlight off): 0.5mA
Sleep Power Consumption: 0.05mA
Voltage Acquisition Accuracy: ± 1.0%
Current Acquisition Accuracy: ± 1.0%
Capacity Acquisition Accuracy: ± 1.0%
Backlight Turn-On Current: 100mA
Range of Battery Capacity Values: 0.1 – 9999.0 Ah
Amperage Range: 0-500A
Temperature Range: 14 to 140 °F (-10 to 60 °C)
Warranty: 1 Year
Panel Mounting
The display will mount in a rectangular opening measuring 53.5 x 37.5 mm and
is held in place by (2) 2mm self-tapping tapered flathead screws. For mounting
instructions please refer to the diagram below:
Troubleshooting
My screen will not power on:
- Make sure that your power connection is secure and wired in the correct orientation. The B+ terminal should be tied direct to the Positive (+) terminal of your battery.
- Also check the shielded data cable connection. Make sure it is fully inserted to both the shunt and the rear of the display.
My battery’s capacity is not correct, or not reading at all:
- Repeat the Battery Parameters Setup and Battery Capacity Confirmation instructions. Make sure you remember to set the batteries full capacity at the end of the capacity confirmation instructions.
The backlight is flashing when discharging, and solid when charging:
- The shunt is wire in backwards. Make sure the B- is wire to the Negative (-) battery terminal, and the P- is wired to your output and charger Negative (-).
My meter is not measuring one of my discharge loads or charging currents:
- Make sure the device is not wired direct to the batteries
Negative (-) terminal. All device loads and charging sources
Negative (-) wires need to be wired direct to the P- terminal of the shunt. All currents will need to flow through the shunt to be measured.
Support
For technical assistance, please contact:
Powerwerx
23695 Via Del Rio
Yorba Linda CA 92887
714-674-0073
www.powerwerx.com
References
Read User Manual Online (PDF format)
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