4
Explanation of Functions
The LD4 setup and calibration functions are configured through a push button sequence. Two levels
of access are provided for setting up and calibrating:-
FUNC
mode (simple push button sequence) allows access to commonly set up functions such as
alarm setpoints.
CAL
mode (power up sequence plus push button sequence) allows access to all functions including
calibration parameters.
The three push buttons located on the main circuit board are used to alter settings. Once
CAL
or
FUNC
mode has been entered you can step through the functions, by pressing and releasing the
F
push
button, until the required function is reached. Changes to functions are made by pressing the
^
or
v
push
button (in some cases both simultaneously) when the required function is reached. See the flow chart
example which follows
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LD4LNMAN-1.0-1
F
F
F
F
F
Entering
Mode
CAL
Entering
Mode
FUNC
1. Remove power from the instrument
and wait 5 seconds . Hold in the
button and reapply power.
The display will indicate
as part of the
"wake up messages" when
the message is seen
you can release the
button.
Move to step 2 below.
2. When the "wake up"
messages have finished
and the display has settled
down to its normal reading
press, then release the
button.
Move to step 3 below.
1. When the "wake up"
messages have finished
and the display has settled
down to its normal reading
press, then release the
button.
Move to step 2 below.
3. Within 2 seconds of
releasing the button
press, then release
the and buttons
together. The display will
now indicate followed
by the first function.
2. Within 2 seconds of
releasing the button
press, then release
the and buttons
together. The display will
now indicate followed
by the first function.
^
^
^
^
FUNC
FUNC
F
F
F
F
F
CAL
CAL
Notes: If step 1 above has been completed then the
instrument will remain in this
mode state until
power is removed. i.e. there is no need to repeat step 1
when accessing function unless power has been removed.
The instrument should show all 8’s on power up
e.g.
if the instrument does not reset then
these numbers will not be seen. Switch off the instrument
and allow a longer time delay before powering up again.
CAL
8.8.8.8.
No special power up procedure
is required to enter
mode.
FUNC
