Dynasonics DXN Portable Ultrasonic Measurement System - Manual (Page 99)

Function
Direct
Current
Alternating
Current
Earth
(Ground)
Protective
Ground
Chassis
Ground
Symbol
Figure 120: Electrical Symbols
The 24 volt DC power converter and 12 volt auto-style power cord connect to the 3-pin socket connection located on the
back of the enclosure. A fully charged battery will provide up to 9 hours of continuous operation before recharging will
be necessary.
At that point, the meter will only operate a short time more until it automatically turns itself off.
If the DXN is to be used for extended periods of operation, the 24 V DC line power converter or the 12 V auto-style converter
can remain connected indefinitely.
To charge the internal Lithium-Ion Smart battery, apply power, using the enclosed 24 V DC line power converter or auto style
power cord, to the DXN for a period of 4...24 hours. The DXN has an integral charging circuit that prevents overcharging. The
instrument can be permanently connected to AC line power without damaging the flowmeter or the battery.
The Lithium-Ion Smart 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:
•
When charging or using external power, allow for airflow to the instrument.
• The DXN battery management circuitry will not allow the battery to become overcharged.
• The lithium-ion battery is rated for 300 cycles, but may last much longer than that. Cycle counts are shown in the
system menu.
• If the DXN is stored for prolonged periods of time, recharge every 6 months and recharging before use is recommended.
• If the DXN is stored for prolonged periods of time, store at room temperature. Extended exposure above 40° C can
degrade battery life.
• Do not expose unit to temperatures beyond those specified.
• Battery should only be replaced by authorized personnel.
• In the unlikely event that smoke, abnormal noise, or strange odor is present, immediately power off the DXN and
disconnect all power sources. Report the problem to your device provider immediately.
Use wiring practices that conform to local codes (National Electric Code® Handbook in the USA). Use only the power
converters that have been supplied with the DXN flowmeter. The ground terminal, if present on the converter, is mandatory
for safe operation.
CAUTION
ANY OTHER WIRING METHOD MAY BE UNSAFE OR CAUSE IMPROPER OPERATION OF THE INSTRUMENT. IT IS
RECOMMENDED NOT TO RUN LINE POWER WITH OTHER SIGNAL WIRES WITHIN THE SAME WIRING TRAY OR CONDUIT.
NOTE: N
This instrument requires clean electrical line power. Do not operate this unit on circuits with noisy components (i.e.
fluorescent lights, relays, compressors, variable frequency drives, etc.)
The DXN can be operated from a 10…15 V DC source, using the included auto-style power cord, as long as it is capable
of supplying at least 40 watts—observe proper polarity. Note that extended operation on an automotive supply could
substantially reduce the automotive battery.
Installation & Operation Manual
Page 99 February 2013