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Instruction Manual A70 Version 6 19th April 2004
BEKA associates Ltd, Old Charlton Road, Hitchin, Hertfordshire. SG5 2DA. UK. Tel: +44 (0) 1462 438301
8.6.3) “SP1” - Setpoint 1
. (or setpoint 2). This is the
alarm setpoint value and is entered in the same units
as the display.
8.6.4) “hILO” - High/Low
. Each alarm can be set as
either active high or active low.
8.6.5) “nE” - Normally Energized
. This parameter
determines the state of the changeover relay. If “nE”
is “on” then the alarm relay is normally energized,
meaning that should there be a power failure the
alarm will change state (failsafe).
8.6.6) “dELA” - Delay
. This function can be used when
a delay in an alarm output is required. The delay can
be programmed with any value up to 3600 seconds.
8.6.7) “SIL” – Silence
. This function allows the relay
outputs to be de-activated (or silenced) for up to
3600 seconds. Hence, an alarm sounder connected
to the output relays could be momentarily “silenced”
by the operator pressing the scroll button. If the input
signal was still in the alarm range after the silence
time had elapsed, the alarm would re-activate.
8.6.8) “Ltch” - Latch
.
This function allows the alarms to
be latched on. If the input signal causes the alarm to
trip, then the relay output(s) will be held in the alarm
state even if the input signal falls back into normal
operating range. The latched alarm(s) is
acknowledged by pressing the scroll button.
8.6.9) “AcSP” - Access Setpoints
.
This option
allows an operator access to the alarm setpoints without
having to go through all the other programming menus. When
this function has been enabled, pressing the scroll and up
button together will give the operator access to the setpoints.
This function can be password protected by setting an
“Access Code” (Ac.cd). It is possible, if desired, to use the
same password for access to both the alarm and main menu
programming.
8.7) Pushbutton Re-enable
The pushbutton disable function, (also called anti-tamper
function) completely disables the pushbuttons – ideal if the
Advisor could be open to tampering from unauthorized
personnel. Once this function has been switched on, the only
way to regain control of the pushbuttons is to push the buttons
in the following sequence.
Once this sequence has been followed, the display will briefly
show “good” and the buttons will be re-enabled.
8.8) Transducer Supply Output (if fitted).
To change a transducer supply output voltage, internal jumper
links must be adjusted.
Switch off the power and
disconnect all the connectors
. Remove the four retaining
screws at the back of the instrument and carefully slide the
electronic board sets out of the case until the top sub-board
with the jumper links is revealed (as per diagram).
NOTE: The
electronic circuit board sets are not designed to be
completely removed from the case !!
Position the links in
the appropriate places and carefully re-assemble.
Note: The transducer supply is a 4 wire output – this
eliminates cable resistance. The two sense terminals
must be
connected to either the sensor (best practice) or the
transducer supply outputs i.e. link rear terminals 14 to 15 and
16 to 17.
8.9) Transmitter Supply Output (if fitted)
The transmitter supply output voltage is 24Vdc and is not
adjustable. It supplies up to 22mA – ideal for loop-powered
transmitters.