Specifications
X3 Operating Manual
142
Sartorius
12.4 Weighing Electronics
The weighing electronics are suitable for connection of strain-gauge load cells.
12.4.1 Load Cells
Load cell type
Strain gauge, 6 or 4-wire connection possible
Supply voltage
U= 12V DC for I
max
= 160 mA
for up to 8 load cells of 650
Ω
each or 4 load cells of 350
Ω
each
Sense voltage monitoring
Sense voltage below + 4VDC -- -4VDC is detected; can be switched off
Max. load
> 75
Ω
Cable length
Max. 500 m
12.4.2 Principle
Principle
DC voltage, delta-sigma converter,
ratiometric to the load cell supply voltage
Conversion / measurement time 5, 10, 20, 40, 80, 160, 320, 640, 960, 1200, 1600 ms
Digital filter
Selectable, 4th order (low-pass),
Characteristic: Bessel, aperiodic, Butterworth, Tschebyscheff
Configurable cut-off frequency
12.4.3 Accuracy and Stability
Accuracy class
< 10000 e (Cl. III) acc. to OIML R76 / EN 45501
Min. measuring signal (OIML)
=/> 0.42mV/V = 5mV corr. to 0.5µV/e for 10000 e
Min. measuring signal (OIML)
=/> 0.25mV/V = 3mV corr. to 0.5µV/e for 6000 e
Linearity error
< 0.003 %
Zero stability error (TK
0
)
< 0.05 µV/K RTI <= 0,004%/10K at 1mV/V
Span stability error (TK
Spn
)
< +/- 2.5 ppm/K
12.4.4 Sensitivity
Sensitivity
0.5 µV/e @ 10000e (Cl. III) OIML R76; 0.5 µV/e @ 3000e OIML R76
Resolution
7.5 million counts at 3mV/V, not legal for trade
Input voltage (input dead
load)
0 ... max. 36 mV DC, symmetrical to 0
Dead load range
36 mV DC (max. input signal); input/ calibration via software
Summary of Contents for X3 PR 5410
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