17.5 Weighing electronics
The weighing electronics are suitable for connection of strain-gauge load cells.
17.5.1
Load cells
Load cell type
DMS cells
6 or 4-wire connection possible
Supply voltage
12 V DC
-
for I
max
= 160 mA
-
for max. 8 load cell with je 650
Ω
-
4 load cells with 350
Ω
each
Sense voltage monito-
ring
Shortfall of +4 V DC -4 V DC is recogni-
zed. Can be turned off by software.
Max. load
≥75
Ω
17.5.2
Principle
Principle
DC voltage, delta-sigma converter, ratiometric to the
load cell supply voltage
Conversion/measuring
time
5, 10, 20, 40, 80, 160, 320, 640, 960, 1200, 1600 ms
Digital filter
Can be activated, active 4th order (low pass)
Characteristic: Bessel, aperiodic, Butterworth, Tscheby-
scheff
Limit frequency
configurable
17.5.3
Accuracy and stability
Accuracy*
0.5 µV/e corr. to 3 mV for 6000 e
0.5 µV/e corr. to 5 mV for 10,000 e
Class III, according to OIML R76/EN45501
Min. measuring signal
(OIML)*
6,000 e: ≥0.25 mV/V
10,000 e: ≥0.42 mV/V
Linearity*
<0.003 %
Zero standstill error (TK
0
)*
<0.05 µV/K RTI; ≤0.004 %/10K at 1 mV/V
SPAN stability error (Tk
span
)*
< ±2.5 ppm/K
* with a measurement time of 160 ms.
17.5.4
Sensitivity
Sensitivity
0.5 µV/e @ 10,000 e (Cl. III) OIML R76
Max. resolution
7.5 million internal counts at 3 mV/V
Measuring input (measu-
ring dead load)
0
max. 36 mV DC, symmetrical to zero
X3 Process Indicator PR 5410
17 Specifications
Minebea Intec
EN-334
