14399527.01 05/2021 EN/DE/FR/ES
8WIKA operating instructions ow switch, model FSD-4
EN
3. Safety
Information
... points out useful tips, recommendations and information for ecient and trouble-free operation.
3.2 Intended use
The ow switch has been designed and built solely for the intended use described here, and may only be used accordingly.
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Conversion of ow velocities into an electric signal.
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No assembly in downpipes open towards the bottom.
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Use in buildings and outdoors (avoid high ambient temperatures and direct UV irradiation).
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Environment with max. pollution degree of 3.
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Voltage supply of overvoltage category II.
The ow switch is used to monitor whether the ow exceeds or drops below specied ow values, e.g. to prevent
pumps from dry running. The analogue signal should only be used as a trend indicator in order to monitor process
changes, such as lter blocking.
Only use the ow switch in applications that lie within its technical performance limits.
→ For performance limits see chapter 9 “Specications”.
Refrain from unauthorised modications to the ow switch.
Any use beyond or dierent to the intended use is considered as improper use.
The manufacturer shall not be liable for claims of any type based on operation contrary to the intended use.
3.3 Personnel qualication
Skilled personnel
Skilled personnel, authorised by the operator, are understood to be personnel who, based on their technical training,
knowledge of measurement and control technology and on their experience and knowledge of country-specic regula-
tions, current standards and directives, are capable of carrying out the work described and independently recognising
potential hazards.
Special operating conditions require further appropriate knowledge, e.g. of aggressive media.
