Pavone Systems MCT 1302, Техническое руководство, Страница: 46 / 84

Page 44
EXAMPLE OF SETUP/CALIBRATION
By setting the parameters listed above, the theoretical calibration of the full scale of the MCT 1302 is
carried out. This procedure must be completed with the zero calibration described below (*page 45).
The procedure guarantees, in the absence of mechanical problems, a good accuracy of the system
(max. error <1% F.S.).
When the division value selection is changed, the theoretical full scale calibration is automatically
recalculated. Selections incompatible with the calibration parameters or with the calibration present
in the memory are not accepted.
It is necessary to weigh a tank, with a weight of 750 Kg and with a capacity of 1000 liters, containing
a product with a specific weight of 1.3 Kg/dm
3
whose weight is to be read with a display resolution
of 0.2 kg.
Before proceeding with the setup, make sure that the load cells are connected correctly to the unit and
that the tank is empty; you can proceed with the setting of the parameters.
You can use:
#3 load cells capacity 1000 Kg
Sensitivity of 2.0015, 2.0008 and 1.9998 mV/V respectively (average value = 2.0007 mV/V)
Set the following values in the setup parameters:
Measurement unit = kg
Division value = 0.2
Load Cell capacity = 3000
Load Cell sensitivity = 2.0007
Full scale = 1500
Dead Weight = 0
Make sure that the value of the signal read in the HARDWARE TEST, LOAD CELLS menu corresponds
to the tare weight of the system according to the following proportion:
3000:2.0007=750:X
Where X is the value of the signal expressed in mV/V corresponding to the theoretical value of the
weight of the empty tank. The value should be about 0.5 mV/V
(*) At this point, you can proceed to the calibration described in the next paragraph or you can exit
the setup menu by saving the data entered.
The instrument should indicate the value corresponding to the weight of the empty tank (for example
756.8).
You can enter the setup menu again and enter the value of the weight read in the “Pretare” parameter
and enter the value 756.8
Exit the setup menu again by saving the data.
For greater accuracy, prepare sample weights or pre-weighed material on a certified scale and proceed
with the calibration described in the next paragraph.