Det-Tronics ATX10 Transmitter - Manual (Page 23)

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startup
The following section describes configuration of the
acoustic detector (using a HART handheld device) for
the following modes of operation:
• Basic
• Profile - Level / Learn
The ATX10 is factory programmed to run in Basic
operating mode. This mode of operation uses the
simplest setup process, but offers the fewest options
for adjusting sensitivity.
Profile mode is an alternate option that allows access
to additional configuration parameters, as well as the
ability to “Learn” background profiles.
BASIC MODE
Basic mode uses a simple alarm detection technique.
The detector searches the ultrasonic spectrum for
bands that exceed a fixed threshold. When a sufficient
number of these bands exceeds the pre-set level, an
alarm condition is detected (adjustment range = 40-120
dB, default = 59 dB). If the alarm condition continues
for a fixed period of time, an alarm output is generated
(adjustment range = 0-30 seconds, default = 5 seconds).
The fixed threshold level and the fixed time period are
field selectable, and are the only variables that need
to be considered in Basic mode. Use the following
procedure to configure the detector for Basic operating
mode.
1. Navigate the HART menu as follows:
DEVICE MENU > DEVICE SETUP > ALARM SETUP
> MODE > BASIC.
BASIC MODE
LEVEL (dB)
DELAY (SEC)
AUTO LEVEL
DEVICE SETUP
ALARM SETUP
SD MENU
SET RTC
CALIBRATION MENU
WRITE PROTECT
HART SETUP
ALARM SETUP
MODE BASIC/
PROFILE/
ADVANCED
LATCHING
BASIC MODE
PROFILE MODE
2. In the BASIC MODE menu, set the LEVEL (dB): This
should be set to a numeric value between 40 and 120
(factory default is 59). This represents the threshold at
which a leak will be detected and an alarm declared.
Lower numbers represent greater sensitivity and
higher numbers will result in less sensitivity to alarm.
This value can be set manually, or by using the AUTO
LEVEL function.
ALARM SETUP
MODE BASIC/
PROFILE/
ADVANCED
LATCHING
BASIC MODE
PROFILE MODE
BASIC MODE
LEVEL (dB)
DELAY (SEC)
AUTO LEVEL
AUTO LEVEL
ENABLED?
ENABLE
3. AUTO LEVEL can be set as follows:
Enable AUTO LEVEL via the ENABLE command
in the AUTO LEVEL submenu. The detector will
automatically select a new LEVEL (dB) setting
based on the background noise picked up during a
10 second (not field adjustable) interval.
4. Set the DELAY (SEC): This delay represents the
time that an alarm condition must be held in order
to annunciate an alarm (adjustment range = 0-30
seconds, default = 5 seconds). It is normally not
necessary to change this value. However, it can be
useful to increase the delay if there are false alarms
due to momentary events.
PROFILE MODE
In the Profile operating mode, the detector still uses the
same alarm detection techniques. However, several
additional options and capabilities are offered. Use the
following procedure to configure the detector for Profile
operating mode.
1. Navigate the HART menu as follows:
DEVICE MENU > DEVICE SETUP > ALARM SETUP
> MODE > PROFILE.
PROFILE MODE
ALARM MODE LEVEL/LEARN
LEVEL (dB)
SENSITIVITY (dB)
BAND COUNT
DELAY (SEC)
RECOVER (SEC)
LEARN MENU
PREALARM ON
PREALARM LVL
DEVICE SETUP
ALARM SETUP
SD MENU
SET RTC
CALIBRATION MENU
WRITE PROTECT
HART SETUP
ALARM SETUP
MODE BASIC/
PROFILE/
ADVANCED
LATCHING
BASIC MODE
PROFILE MODE
2. In the PROFILE MODE menu, select ALARM MODE,
and then either LEVEL or LEARN. (The following
sections describe the differences between LEVEL
and LEARN.)