Dynasonics TFXP Series Transit Time Ultrasonic Flow Meter - Manual (Page 3)

Rev. 5/09 -1.1- TFXP
BEFORE OPERATING THE TFXP
The TFXP flow meter is equipped with a lead-acid Gel Cell battery.
This battery will require charging before initial operation.
Apply power, utilizing the enclosed 12 volt DC output line power
converter or auto-style power cord, to the TFXP for a period of 16-
24 hours prior to using the product for the first time. The power
converter connects to the DC IN +12V socket connection located on
the side of the enclosure. See Figure 1.1. A fully charged battery
will provide up to 24 hours of continuous operation before
recharging will be necessary.
When the battery level has decreased to a point where recharging is
required, the LOW BATTERY indicator will illuminate on the front
panel. At that point, the meter will only operate a short time more
until it automatically turns itself off – preventing excessive battery
discharge that can damage the Gel Cell battery. The TFXP has an
integral charging circuit that prevents overcharging. The instrument
can be permanently connected to AC line power without damaging
the flow meter or the battery. Page 1.12 of this manual contains
additional recommendations to preserve and maximize the power in
the TFXP battery.
If the TFXP is to be used for extended periods of operation, the AC
power converter or the 12 volt auto-style converter can remain
connected indefinitely.
Important
Notice!
Figure 1.1 — Power Connection