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55
System Alarms
To program a System Alarm you must check the box that corresponds to the
desired response to each alarm condition (see below). You may send the alarm
to a pager, via modem, or set one of four relays (depending on which options
are installed in the logger).
Column
M
R1
R2
R3
R4
Output Type
Modem
Relay One
Relay Two
Relay Three
Relay Four
Check the box in the ‘M’
column to report via Modem.
Check the box in the R1
through R4 column to report
via relay 1-4 (if available).
A table of each system alarm and its cause is shown below:
System Alarm Condition
Low Main Battery
Memory Battery
Low Slate Memory
Slate Memory Full
Low Bubbler Pressure
U-Sonic Echo Loss
(A pulse of sound was sent
but no echo was received
back)
Transducer Ringing
U-Sonic Failure
AS041 Rev. 10-1-99
Cause
Batteries require charging or replacement.
Internal memory battery voltage is too low.
Change memory batteries.
Free slate memory is less than 20%
Slate memory is full. Download data and
restart program.
Bubbler system not developing sufficient air
pressure. (Inspect air pump, reservoir and
associated tubing assemblies for problem)
The echo has been temporarily deflected by a
change in site conditions such as floating
debris or foam in the channel, wind, etc.
Transducer is operating within the deadband.
Transducer not plugged in. Cable damaged.
Transducer thermal sensor damaged.
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