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PDF SM8100 Data sheet ( Hoja de datos )
| Número de pieza | SM8100 | |
| Descripción | Magnetic-inductive flow sensor Operating instructions | |
| Fabricantes | ifm | |
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Operating instructions
Magnetic-inductive flow sensor
SM8100
UK
1 page  
3 Functions and features
The unit monitors liquids.
It detects the 3 process categories volumetric flow, consumed quantity, medium
temperature.
Application area
Conductive liquids with the following properties:
• conductivity: ≥ 20 µS/cm
• viscosity: < 70 mm2/s at 40 °C
4 Function
UK
4.1 Processing of the measured signals
• The unit displays the current process values.
• It generates 2 output signals according to the parameter setting.
OUT1: 3 selection options........................................................... parameter setting
switching signal for volumetric flow limit values ....................................... (→ 9.2.1)
or pulse sequence for totalising meter ..................................................... (→ 9.3.1)
or switching signal for preset counter ....................................................... (→ 9.3.2)
OUT2: 4 selection options
switching signal for volumetric flow limit value ......................................... (→ 9.2.2)
or switching signal for temperature limit value ......................................... (→ 9.4.1)
or analogue signal for volumetric flow ...................................................... (→ 9.2.3)
or analogue signal for temperature .......................................................... (→ 9.4.2)
OUT2 (pin 2) cannot only be used as an output
but also as an input for an external reset signal: ...................................... (→ 9.3.5)
4.2 Volumetric flow monitoring
The medium flows through a magnetic field. It generates a signal voltage which is
directly proportional to the volumetric flow.
• 2 switching signals for volumetric flow limit values can be provided (output 1
and output 2). For the switching functions → 4.5.
• An analogue signal proportional to the volumetric flow (4...20 mA or 0...10 V)
can be provided on output 2. For the analogue functions → 4.6.
In addition to the flow velocity, the unit also detects the flow direction. The positive
flow direction is marked on the unit by an arrow (“flow direction” → 5.2).
5
5 Page 
Example: dSt for window function
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UK
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1 Volumetric flow quantity Q reaches 0.5% of VMR → dSt starts, output becomes active.
2 dSt elapsed, Q reached good range → output remains active.
3 Q above SP (leaves good range) → output is reset.
4 Q again below SP → output becomes active again.
5 Q below rP (leaves good range) → output is reset again.
6 Q reaches again 0.5 % of VMR → dSt starts, output becomes active.
7 dSt elapsed, Q has not reached good range → output is reset.
8 Q reaches good range, output becomes active.
5 Installation
5.1 Installation location
►►Install the unit so that the measuring pipe is always completely filled.
►►Arrange for inlet and outlet pipe lengths. Disturbances caused by bends,
valves, reductions, etc. are compensated for. It applies in particular: no shut-off
and control devices are allowed directly in front of the unit.
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S = disturbance; D = pipe diameter; F = flow direction
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet SM8100.PDF ] | |
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