Figure 4: Power Supply Wiring
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
Backup
Capacity (AH)
Time (hrs)
2.2
36
3.0
50
5.0
80
8.0
120
12.0
200
Connect the positive terminal of the Battery to the
+
Bat
terminal
on the Skymetry WTU-14.
Skymetry WTU-14
Manual
26
Summary of Contents for Skymetry WTU-14
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Page 32: ...Figure 11 A thermistor and a 4 20mA transducer connected to the unit Skymetry WTU 14 Manual 32...
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