Dynasonics TFXP Series Transit Time Ultrasonic Flow Meter - Manual (Page 14)

Rev. 5/09 -1.12- TFXP
Battery
Charging and
External
Power
Sources The 12 volt DC power converter and 12 volt auto-style power cord
connect to the socket connection located on the side of the
enclosure. See Figure 1.5 on page 1.11. 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 brightly 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.
NOTE: When the battery is fully charged the LOW BATTERY
indicator may have a very dim glow.
If the TFXP is to be used for extended periods of operation, the
12 VDC line power converter or the 12 V auto-style converter can
remain connected indefinitely.
To charge the internal Gel Cell battery, apply power, utilizing the
enclosed 12 VDC line power converter or auto-style power cord, to
the TFXP for a period of 16-24 hours. 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.
The Gel Cell battery is “maintenance free”, but it still requires a
certain amount of attention to prolong its useful life. To obtain the
greatest capacity and longevity from the battery, the following
practices are recommended:
• Do not allow the battery to completely discharge. (Discharging
the battery to the point where the LOW BATTERY indicator
illuminates will not damage the battery. Allowing the battery to
remain discharged for long periods of time can degrade the
storage capacity of the battery.) When not in use, continually
charge the battery by keeping the 12 VDC line power converter
plugged in and connected to the flow meter. The TFXP battery
management circuitry will not allow the battery to become
“overcharged”.
PART 1 - TFXP TRANSMITTER CONNECTIONS