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Skymetry WTU-14 Manual
Connecting a Battery
In the event of a power failure, the Skymetry WTU-14 can oper-
ate from a 12V sealed lead-acid gel-cell rechargeable battery. The
duration of battery time depends on the capacity of the battery (see
chart below). The unit incorporates circuitry to maintain the proper
charge for a 12V gel-cell battery whenever the power supply is
plugged in. The unit also includes special circuitry to prevent the
battery from being damaged in the event of an extended power out-
age. The battery should provide approximately 5 years of service
before needing replacement.
Battery
Capacity (AH)
2.2
3.0
5.0
8.0
12.0
Connect the positive terminal of the Battery to the + Bat terminal
on the Skymetry WTU-14.
26
Figure 4: Power Supply Wiring
Backup
Time (hrs)
36
50
80
120
200
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