
FP-4400 PORTABLE CLAMP-ON ULTRASONIC FLOW METER
ONICON Incorporated 727.447.6140
Page 9
onicon.com
2.1.3 Internal Battery
WARNING
The FP-4400 includes a lithium-ion battery. For your safety, operate only within the specifications put forth by
ONICON.
A built-in rechargeable lithium-ion battery supplies power for approximately 15 hours of continuous operation when fully
charged. This battery is not user serviceable. Contact ONICON for assistance if you believe the battery needs replacement.
When you first use the FP-4400, it will take the meter two or three charge/discharge cycles to calibrate itself to the battery.
The meter may reach 100% charge or 0% discharge faster than anticipated until this process is complete.
State of charge is shown when the meter is ON, or in STANDBY. High rate charging only occurs when the meter is ON or in
STANDBY. For best results, charge the meter in one of these two modes.
When the charge of the battery reaches 100%, the meter will reduce the charge rate to protect the battery. In this state,
there will be a very slow discharge. When the meter reaches 98% capacity, charging will resume until a 100% charge is
reached. This cycle will repeat until the charger is disconnected or the meter powered OFF.
When the battery reaches 5%, a pop-up message will appear stating that the charge is low, and that the meter will
automatically shut-down at 0%. To clear this message permanently, connect the charger. To temporarily clear the message,
press any button on the meter. A full charge from empty requires approximately 3 hours of charging using the included 3
Amp (15 Watt) charger.
2.1.4 Charger
Included with the FP-4400 package is a mains-powered USB-C, 5 Volt, 3 Amp (15 Watt) charger. The power outlet
connection type can be changed via the included modular plates.
For best results, use the included charger. A third-party USB-C cable connected to a third-party charger or battery bank
may also be used. Charging rate may be slower than the included charger if the output is not capable of delivery at least 2
Amps at 5 Volts (10 Watts).