KROHNE BM 90 EN - Manual (Page 4)

4
1.2. Initial start up Level-Sonic
The Level-Sonic BM90 system requires programming by
the operator to obtain the required measurements and
control. To become familiar with the use of the system, it
is suggested that the following Q UICK S T A R T G UIDE i s
used before the instrument is installed.
Quick Start Guide :
1. Connect power and transducer cables as defined on
the instrument.
ac Power Supply Transducer dc Power Supply
[ 1 ] [ 2 ] [ 3 ] Terminal Nos: [ 19 ] [ 20 ] [21 ] [27 ] [28]
E N L Black Blue Screen +ve -ve
2. The instrument is supplied factory set on initial power
up to work in distance measurement up to 10 metres
from the transducer on the Level-Sonic BM90/E and 15
metres on the Level-Sonic BM90L/LE.
3. Hold the transducer approximately 1.5 metres from a
flat surface and switch on.
After a short period, the display will show the distance
(e.g. 1.50) between the transducer and the surface.
If the transducer is now moved slowly towards the sur-
face, the reading should decrease. This shows that the
unit is correctly wired and is operating as expected in
response to the reduction in distance.
If the reading increases as the transducer is moved
towards the surface, it indicates that the unit has been
previously programmed to read level not distance.
1.2.1. How to view parameters
The operational program for Level-Sonic BM90 is con-
tained within the parameters listed on Page 17 . Each
parameter instructs the unit to carry out a specific func-
tion. To look at the complete list of parameters, please
refer to chapter 3 but as an intitial guide proceed as fol-
lows :
Press ’MODE’, the display will show ’PROG’. (there
may be a delay of up to 6 seconds if the instrument is
busy). Press ’1’ immediately to obtain a display of
Pr.01 or the previous parameter number used.
It is now possible to key in any parameter number, via
the keypad. To display its value press ’DSP’. To
return to the parameter number press ’DSP’ again.
To view a sequence of parameter numbers, enter the
first one that is of interest and then press ’s’ to
increase the parameter number or ’t’ to decrease the
parameter number.
Similarly, if a parameter value is displayed then press-
ing ’s’ or ’t’ key will momentarily flash the next para-
meter number and then display that parameter value.
If a key is not pressed for a period of 30 seconds
the unit will automatically return to the run mode.
Press ’MODE’ to return Level-Sonic BM90 to the
’RUN’ mode.
1.2.2. How to change parameters
l Press ‘MODE‘ to display ‘prog‘.
Whilst ’prog’ is displayed press ‘1‘
and the display will show either Pr.01
or previous Pr. number. If not Pr. 01
then press ‘1‘ to obtain display of
Pr.01.
l Press ‘DSP‘ to display the value of Pr.01.
l Press ‘ENT‘ and the display will show ‘COdE‘
requesting that a security code is
entered.
l Press ‘9753‘ to enter the factory set security code.
(see page 16 to change code)
l Press ‘ENT‘ and the display will blink and show
either the default value of Pr.01 which is 2, or any other
value previously programmed into it.
The unit is now ready to be programmed.
Note : Whenever ‘COdE‘ is displayed, re-enter the secu-
rity code.
The display should now beshowing the value entered in
‘Pr.01‘ which is 2.
To change the value of this or any other parameter press
the new number required and ‘ENT‘. For our example
press 1 and ‘ENT‘ and the value of Pr.01 will change to 1
which means it is in level mode i.e. measuring liquid
height above datum.
Then using the ‘ s ‘ key move to the other parameters that
require changing.
To change the value of any other parameter either use
the ’s’ key to move to higher Pr numbers, or press ’DSP’
and then enter the Pr number required and press ’DSP’
again to display its value.