Toa VP-2241, Instruction Manual

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Chapter 3: SYSTEM OPERATION OUTLINE
2. mONITOr fuNcTION
3-4
2.2. Monitoring That Requires Interval Settings
• Battery Monitoring
Set the time interval for checking the backup batteries for correct voltage. monitoring can be set for Daily
(time), Weekly (day and time) or monthly (date and time) intervals. use the Pc software to perform these
settings. refer to
p. 7-29 for the setting procedure.
• Monitoring in AC Failure Mode
In Ac failure mode, the system is powered by the battery. To minimize battery power consumption in this case,
all amplifiers not used for broadcast are placed in standby mode regardless of the drive mode setting, causing
their channel power lEDs to light red.
Each amplifier is switched to active mode only while being monitored (its channel power lED lights green).
Because the system monitoring consumes battery power, the monitoring interval in Ac failure mode needs to
be set not for the "Within 100 seconds" as normal monitoring mode but for either "Every 1 – 24 hours, 1-hour
units" or "Every 1 – 60 minutes, 1-minute units" using the Pc software. for setting the monitoring interval,
refer to
p. 7-29 .
Note
In Ac failure mode, general broadcast cannot be performed.
• Impedance Monitoring
The VX-200SZ Impedance Detection module is designed to detect speaker line failures by comparing their
impedance. When external attenuators are used through speaker lines, they must be bypassed for correct
monitoring or correct failure detection.
Because sound volume will suddenly increase if an attenuator should be bypassed during broadcast, set
the monitoring interval not for the "Within 100 seconds" as normal monitoring mode but for either "Every
1 – 24 hours, 1-hour units" or "Every 1 – 60 minutes, 1-minute units" using the Pc software. for setting the
monitoring interval, refer to
p. 7-14 .
for the operation details about external attenuator control terminals, refer to p. 3-7 .
Notes
• All VX-200SZ units using external attenuators in the system are monitored at the same timer intervals.
• Time intervals set above are rendered invalid in AC failure mode, and monitoring is carried out at the time
intervals set above in the "monitoring in Ac failure mode" explanation.
• It is highly recommended that monitoring be performed in idle periods of time because sound volume will
suddenly increase if attenuators are bypassed during broadcast.