English
13
OPERATION IN A VARIABLE PROPORTION
The Boomerang Evolution dispenser is factory set to
operate in a fixed plaster/water proportion, which is
shown by the pilot light turned on. If the unit is set to
operate this way, when you change the grammes of
plaster by pressing the
keys, the millilitres of water
will change proportionally.
If you want to change the amount of plaster and the
amount of water independently, proceed as follows:
Select the material you want to change, as explained
in the
Switching Materials
section.
Press the
key for a few seconds
.
You will notice that the upper display reads “100”.
Press the
key
,
and make the reading on the lower
display go down below 5. The display will show the
message ”
_ _ _
”.
To confirm it, press the
key for a few seconds.
You will notice that now the pilot is off. It means
that the unit is operating in a variable plaster/water
proportion.
Now you can modify the amount of plaster and the
amount of water independently. To shift between the
upper and the lower displays, press shortly the
key. A dot on the right side will show you which
display is active.
NOTE:
When working in a variable proportion, if you
want to obtain powder or liquid only, bring down
the reading on the display of the product you don’t
want to obtain until it shows the message ”
_ _ _
”.
STORING DOSAGES IN THE MEMORY
The electronic controls of the Boomerang Evolution
dispenser allow you to store up to 4 different dosages for
each type of material. To store a dosage, proceed as
follows:
First of all, select the dosage you want to store, as
explained in previous sections.
Once you have selected the values you want to store,
select the program (P1, P2, P3 or P4) in which you
want to store the dosage by pressing the
P
key as
many times as required.
Finally, keep the P key pressed for a few seconds. The
display will flicker once to indicate that the values
have been stored in the memory.
USING THE DOSAGES STORED IN THE
MEMORY
To use a dosage stored in the memory, press the
P
key
as many times as required to select the program you
want (P1, P2, P3 or P4).
Press the key
to display the values stored.
Press the
START/STOP
key and start dispensing.
CALIBRATION
The Boomerang Evolution dispenser is factory set
according to the parameters that Mestra has determined
through tests with different types of plaster. The material
you use may be slightly different and the features of the
plaster may vary over time. The unit can be calibrated to
obtain a greater thoroughness in the dosage. The water
dosage may be altered by difference in the voltage of the
power supply as well.
To calibrate the unit, proceed as follows:
Keep a scales close at hand to weigh the plaster, and a
graduated cup to measure the amount of water.
Make sure the water circuit is properly bled (see
Bleeding the water pump
section).
Place a tank with the plaster you have selected (see
Switching materials
section).
Press simultaneously the
keys for a few seconds
until the
pilot starts flickering.
The upper display will show the “
dus
” message to
indicate the dust calibration is going to start.
The lower display will show the calibration value
stored for that type of plaster. If you want to adjust
the value by hand, you can do it by pressing the
keys.
If you do not know the appropriate value for the
calibration, place a container to collect the powder
and press the
START/STOP
key.
The unit will dispense a standard dose of powder in
30 seconds.
Weigh the amount of powder dispensed on an external
scales.
Insert the amount weighed in
grammes
by pressing
the
keys.
To confirm it press the
key.
The upper display will show the “
liq
” message to
indicate the liquid calibration is going to start.
The lower display will show the calibration value
stored for the liquid. If you want to adjust the value
by hand, you can do it by pressing the
keys.
Place a container to collect the water and press the
START/STOP
key.
The unit will dispense a standard dose of water in 10
seconds.
Measure the amount of water dispensed in a graduated
cup or on an external scales.
Insert the volume of water in
millilitres
by pressing
the
keys
.
To confirm it press the
key.
The unit is calibrated and ready to operate.
In an emergency, the unit can be calibrated
approximately. To do this, you can use the values shown
in the next table:
