Rice Lake PR5230 Fieldbus Transmitter - Manual (Page 222)

Specifications PR 5230 Instrument Manual
EN-222 Sartorius
16.5 Weighing Electronics
The weighing electronics are suitable for connection of strain-gauge load cells.
16.5.1 Load Cells
Load cell type Strain gauge, 6 or 4-wire connection possible
Supply voltage U = 12 V DC for I
max
= 160 mA
for
-
max. 8 load cells of 650 Ω each
- 4 load cells of 350 Ω each
Sense voltage monitoring Sense voltage below 8 V, switchable to <8 V
Max. load >75 Ω
Cable length
Standard Max. 500 m
16.5.2 Connecting Cable
Length of the connecting cable between junction box and PR 5230
Type PR 6135, PR 6135A Max. 500 m – length of the load cell cable
Length of the connecting cable between weighing platform and PR 5230
Type LiYCY Max. 500 m
16.5.3 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
16.5.4 Accuracy and Stability
The following values are applicable with a sampling rate of 160 ms.
Accuracy class ≤10000 e (Cl. III) acc. to OIML R76/EN 45501
Min. measuring signal (OIML) ≥0.66 mV/V = 8.0 mV corr. to 0.8 µV/e for 10000 e
Min. measuring signal (OIML) ≥0.40 mV/V = 4.8 mV corr. to 0.8 µV/e for 6000 e
Linearity error <0.003 %
Zero stability error (TK
0
) <0.05 µV/K RTI <= 0,004 %/10K at 1 mV/V
Span stability error (TK
Span
) < ±2.5 ppm/K
16.5.5 Sensitivity
Sensitivity 0.8 µV/e
Resolution 7.5 million counts at 3 mV/V, not legal for trade
Input voltage
(input signal + dead load) 0… max. 36 mV DC, symmetrical to 0
Dead load range 36 mV DC (max. input signal); input/calibration via software