EMC INDUSTRIAL GROUP LTD Specifications
MW93A_IM_ALL_SV6.09f_en 9/59
0.10
1.00
10.00
100.00
0.01 0.1 1 10 100
RATIO (flow r ate [kg/h] / loadce ll capacity[k g])
Measured Flowrate Fluctuation [% ]
50s, 0.1%; 14s, 0.03%
50s, 0.03% ; 14s, 0.01%
50s, 0.01% ; 14s, 0.003%
50s, 0.003%
flow rate r e s pons e [s ],
incre m e ntal loadce ll accuracy[%]
The loadcell incremental accuracy measures how accurately a loadcell can measure small changes in
weight. This accuracy is not normally given on loadcell datasheets, but is generally better than the
other accuracies specified.
Note that other factors may also limit the performance.
Watch flexible couplings to the weigh hopper, as these can easily reduce the achievable performance.
Good accuracy also requires repeatable results from the flow regulator system. Some materials can be
difficult to control (for example powders that fluidise)
Specifications
Loadcell Input AI1
Input Range ±4 mV/V (0-20mV)
Excitation 5 Vdc ±20 %, 250 mA maximum current
Signal processing rate 100 Hz (response time setting≤ 0.5 s)
Input sensitivity 0.5 µV/division maximum
Zero range ±3 mV/V (±15 mV)
Zero drift ±0.02 µV+0.0005 % of deadload/°C typical
Span drift ±0.0005 %/°C typical
Non-linearity ‹0.002 % of FS
Input noise 0.15 µVp-p typical
Filtering 0.04 s to 32.0 s response time adjustable
Sense voltage range 1-5 V
Analog Input AI2
4-20mA input resistance <60 Ω
0-10V input resistance ›100 kΩ
Isolation galvanically isolated to 50Vac
Analog Outputs AO1 & AO2
Output range 0 to 20 mA (-0.2 mA to 21 mA, includes standard 4-20mA)
Maximum load 1000Ω
Resolution 0.4 µA
Response time Loadcell response time setting + 20 ms
Voltage output Use an external resistor to convert mA to volts.
For example 500Ω gives 10 V at 20 mA.
Non-linearity ‹0.01 %
Drift ‹2 µA/°C.
Isolation independently galvanically isolated to 50Vac
High voltage › 8 V
Low voltage ‹ 4 V
Maximum voltage 32 V
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