UltraVoice Manual - Alerting & Notification

Federal Signal UltraVoice
Installation and Operation Manual
SECTION VI
PRE-OPERATION CHECKOUT AND TEST
Note: See UV RTU Field Service Data Sheet located at the end of this section. This is
the suggested data sheet that can be used to test the siren.
6.0 Amplifier and Speaker
Pre-Operation Checkout
With an ohmmeter capable of accurately
measuring resistance of less than 10
ohms, hold the meter probes on the
speaker terminal strips at the bottom of
the system motherboard for each
amplifier and measure the resistance at
the output of that amplifier. The
resistance should be approximately 4.5
ohms. A different reading indicates a
possible wiring error or faulty driver in
the speaker array. Since the 400 Watt
speaker circuits are comprised of two
sets of series wired speaker drivers
connected in parallel, if one of the
drivers in a circuit were to open,
approximately 9 ohms would be
measured. If 200 Watt DSA speaker
combinations are used, a 10.8 ohm
reading should be measured across the
200 Watt load.
WARNING
The output sound level of a Modulator
Siren is capable of causing permanent
hearing damage at short distances;
sound levels may exceed 150 dB.
Therefore, ALWAYS wear adequate
hearing protection when performing
tests or maintenance on the siren.
Power should be supplied to the siren
so that the batteries may be charged for
a period of 24 hours prior to operation of
PRE OPERATION CHECKOUT AND TEST
55
the siren in order to ensure full charge of
the batteries. (Alternatively, the batteries
may be charged externally before
installation following battery the battery
manufacturer‟s recommendations.)
Typical battery voltage should be 27.2
VDC when fully charged at room
temperature. (See specification section
for details.)
After the batteries have been charged, a
simple and non-annoying test for siren
operation would be to disconnect all
amplifier terminal strip connectors from
the bottom of the system mother board,
press one of the manual activation
switches to start one of the preprogrammed
functions. The signal A & B
LEDs should light on the control,
indicating that the tone is being
generated from the control module and
the amplifier power and output LEDs
should be lit. Now momentarily insert
the terminal strip connectors
sequentially for each amplifier. You will
hear the siren tone from the speaker
array for the duration of the time that the
connector is installed (amplifier output
points on the connector should read 67
VAC RMS nominally, this level will read
higher when the speakers are removed).
Cancel the signal tone or wait for it to
time out (typically 3 minutes). If you
wish, you may insert all of the terminal
strip connectors and activate any or all
signals for full volume siren testing.