47
Maintenance
Installation, Operation, and Service Manual
NOTE
: See Appendix A UV RTU Field Service Data Sheet. Use this data sheet to test the
siren.
Maintenance
Service or maintenance should be performed by qualified personnel familiar
with the siren, associated controls, and power sources being used and in
conjunction with the authorities having jurisdiction.
Before servicing or maintaining, ensure that remote activation cannot occur
and disconnect power to the siren and its controls.
The sound output of sirens is capable of causing permanent hearing damage
at short distances. Therefore, always wear hearing protection when performing
tests or maintenance on the siren and avoid excessive exposure.
To prevent the siren from sounding, always turn off the power to the siren
at the ac disconnect switch and remove any dc power being supplied by the
Battery Box before inspecting or maintaining the siren.
UV Controller Preventive Maintenance
Test the siren for proper operation at least once a month. A daily test at noon, curfew, or
other selected time is preferred. This not only enhances the usefulness of the siren and
verifies that it remains ready for use in an emergency, but instills public confidence in the
reliability of the warning system.
In order to minimize the possibility siren failure, annual inspection and maintenance is
recommended. Additionally, see the Pre-operation Checkout and Testing section.
General Maintenance
Driver Replacement and Inspection
Each amplifier drives four 100-watt speakers. To measure the resistance of a given
speaker set, do the following:
1. With an ohmmeter, measure the outputs on the terminal strip (JP21-JP28) (at the
bottom of the backplane motherboard).
2. Observe the dc resistance of the speakers. Normal dc resistance of a speaker set
of 4 drivers is approximately 4.5 ohm. A dc resistance measurement of less than
3.5 ohm indicates that one or both of the speakers is probably shorted. A reading
of approximately 9 ohm or more indicates that at least one of the speakers in the
set is open; a reading of infinity indicates that both speaker sets are open.
3. If a resistance is abnormal, perform resistance checks on each speaker
individually at the speaker array. Refer to the signal connections section for
speaker locations. Each individual driver is 4.5 ohm.
Summary of Contents for ultravoice UV
Page 42: ...42 Installation UltraVoice UV Figure 15 Omni Antenna Installation Example...
Page 43: ...43 Installation Installation Operation and Service Manual Figure 16 Antenna Grounding...
Page 71: ...71 Appendix C Drawings Figure 25 UV Controller Two way Radio Wiring Diagram...
Page 72: ...72 Figure 26 UVTD IP Broadband Wiring Diagram...
