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Operating instructions
Mechatronic flow sensor
SBT633
SBT634
SB0527
UK
80270485 / 00 11 / 2017
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1 Preliminary note
Technical data, approvals, accessories and further information at
www.ifm.com.
► Instructions
→ Cross-reference
Important note
Non-compliance may result in malfunction or interference.
Information
Supplementary note.
2 Safety instructions
• Read this document before setting up the product and keep it during the entire
service life.
• The product must be suitable for the corresponding applications and environmental conditions without any restrictions.
• Only use the product for its intended purpose (→ 3 Functions and features).
• Only use the product for permissible media (→ Technical data).
• If the operating instructions or the technical data are not adhered to, personal
injury and/or damage to property may occur.
• The manufacturer assumes no liability or warranty for any consequences
caused by tampering with the product or incorrect use by the operator.
• Installation, electrical connection, set-up, operation and maintenance of the unit
must be carried out by qualified personnel authorised by the machine operator.
• Protect units and cables against damage.
3 Functions and features
The unit monitors liquids (water, glycol solutions).
It detects the flow quantity on the principle of differential pressure and converts it
into an analogue output signal (4...20 mA).
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4 Function
0
UK
0
1
Q [l/min]
1: fi nal value of the measuring range
The analogue signal for water (20 °C) is linear from 4 mA (= no flow) to 20 mA
(= final value of the measuring range, see Technical Data).
For an output signal > 20 mA the flow quantity is above the final value of the
measuring range.
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5 Installation
WARNING
Personal injury can occur if the unit and connections become hot or media
under pressure (up to 15 bar) or hot media (up to 180 °C) leak.
► Install the unit according to the applicable rules and regulations.
► Ensure that the system is free of pressure during installation.
► Ensure that no media can leak at the mounting location during installation.
► Equip the unit with suitable protection (e.g. cover) to avoid hazard to person-
nel from touching the sensor, connections and cables or from leaking media.
► Insert the unit into the R ¾ pipe according to the direction of flow (arrow) and
tighten.
The best precision of the sensor is achieved by horizontal installation in a
horizontal pipe (fig. 1).
Fig. 1: Recommended mounting position
IN OUT
OUT IN
IN = inlet; OUT = outlet
► Do not install the unit on ferromagnetic materials.
(Ferromagnetic materials are all metals exerting an attractive force on test
magnets.)
► Do not operate the unit in the vicinity of magnetic constant and alternating
fields (e.g. welding systems).
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► If the sensors are installed side by side, observe a minimum distance of 50 mm
between the sensor axes.
Baffled pipes on the sensor's inlet or outlet side are not necessary.
6 Electrical connection
The unit must be connected by a qualified electrician.
The national and international regulations for the installation of electrical
equipment must be adhered to.
Voltage supply according to EN 50178, SELV, PELV.
► Disconnect power.
► Connect the unit as follows:
BN: brown
BU: blue
WH: white
1BN
2WH
3BU
Colours to DIN EN 60947-5-2
L
L
+
7 Technical data and scale drawing
UK
Technical data and scale drawing at www.ifm.com
8 Maintenance, repair, disposal
If used correctly, no maintenance and repair measures are necessary.
In case of strongly polluted media: mount a filter before the inlet (IN).
Recommendation: use a 200-micron filter.
Only the manufacturer is allowed to repair the unit.
After use dispose of the unit in an environmentally friendly way in accordance with
the applicable national regulations.
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