Det-Tronics ATX10 Transmitter - Manual (Page 24)

2.5 95-8657 22
Profile-Level
The Profile-Level mode uses the same fixed threshold
concept as Basic mode. There is a LEVEL (dB)
setting, but no AUTO LEVEL function. The benefit of
using Profile-Level is that some additional settings are
available for increased flexibility.
In some applications the use of the factory default
settings in the Profile-Level mode may be adequate,
however, it is possible to customize the acoustic
detection using the additional settings. The following
additional settings are available in Profile-Level:
BAND COUNT – In Basic mode, the number of
frequency bands that exceed the LEVEL (dB) threshold
are counted. An alarm condition exists when this
count exceeds 14 bands. This number is fixed in
Basic
mode. In Profile-Level mode it can be adjusted
(adjustment range = 1-24, default = 14). Lower numbers
tend to make the detector more sensitive to narrow
band signals, including pure tones or other ultrasonic
emitting devices. Higher numbers tend to decrease
the sensitivity of the detector and require broadband
ultrasonic sound to exceed the LEVEL(dB) threshold in
more bands.
RECOVER (SEC) – This setting specifies the time (in
seconds) that elapses from the moment the alarm
criteria are no longer met until the alarm is cleared.
Profile-Learn
The Profile-Learn mode uses variable thresholds. Each
frequency band has its own threshold level, rather than
a fixed level that is applied to all bands.
The Profile-Learn mode uses a recorded set of band
thresholds called a “Profile.” The process for generating
a profile is referred to as “Learn.”
The detector is commanded to start and stop the
“Learn” process to record the maximum sound level
detected in each band during the recording period.
This data can be used to reduce sensitivity at the
frequency bands where background noise and events
are prevalent while increasing sensitivity in the bands
that are relatively silent.
To perform the Learn process:
1. Navigate to DEVICE SETUP > ALARM SETUP >
PROFILE MODE > LEARN MENU.
PROFILE MODE
ALARM MODE LEVEL/LEARN
LEVEL (dB)
SENSITIVITY (dB)
BAND COUNT
DELAY (SEC)
RECOVER (SEC)
LEARN MENU
PREALARM ON
PREALARM LVL
LEARN MENU
LEARN ENABLED?
START LEARN
STOP LEARN
RECORDED
CLR RECORDED
ALARM PROFILE
SAVED PROFILE
ALARM SETUP
MODE BASIC/
PROFILE/
ADVANCED
LATCHING
BASIC MODE
PROFILE MODE
2. Select CLR RECORDED to clear any previous learn
data, if desired. Any future learn data will build
upon previous results unless this step is performed.
3. Select the START LEARN command to start the
learn process. LEARN ENABLED? will indicate ‘Y’
4. Select STOP LEARN to stop the learn process. At
this point the sequence of START LEARN/STOP
LEARN and/or CLR RECORDED may be repeated
until the desired profile data is collected. The profile
should be characteristic of typical background
sounds that may occur during normal operation. If
there are periodic events that cause false alarms,
it is desirable to conduct the learn process during
these events.