Minebea Intec PR5900 - Page 115

4.7.1.2.1.4.2 by mV/V
In this menu item (under Max at), calibration of the Internal weighing point weighing
electronics is performed with mV/V values.
During input of the load cell mV/V value, the acceleration of gravity at the place of
installation can be taken into account. The STAR load cell data is based on the
acceleration of gravity in Hamburg, Germany: 9.81379 m/s².
SPAN
SPAN indicates the equivalent input voltage in mV/V related to the maximum capacity
(Max) of the scale. It is calculated as follows:
SPAN [mV/V] = maximum capacity x load cell sensitivity C
n
* [mV/V] / load cell capacity
(maximum capacity E
max
x number of load cells)
* load cell sensitivity C
n
= rated output C
n
(see technical data of the load cell)
Dead load
The input voltage in mV/V equivalent to the dead load can be calculated by using the
dead load rather than the maximum capacity in the formula specied above.
Normally, calculation of the dead load (scale without load or empty vessel) is not
necessary.
Subsequent dead load correction (as described in Chapter 4.7.1.2.3) can be used for later
re-determination of the dead load, when the scale or vessel is empty.
LC 2 mV/V @ 2000 kg
Supply 12 VDC
SPAN = 1 mV/V
Dead load 0,5 kg 1000 kg
Max
1.5 mV/V
(18 mV)
0.5 mV/V
(6 mV)
Example
- 1 load cell with rated output C
n
= 2 mV/V
- at maximum capacity 2000 kg
- Maximum capacity 1000 kg
- Dead load 500 kg
- Load cell supply voltage 12 V DC
Accessible via MENU - [Operating] - [System setup] - [Weighing points] - [Weighing
point x] - [Calib] - [New] - [Max at] - [by mV/V] .
4 System setup Process Controller Maxxis 5 PR 5900
EN-113 Minebea Intec