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3
Safety Notes for Installation and Operation
3.1
General Instructions
The sensors of series A5S1...-n are built and tested according to standards DIN EN 61010-1
(VDE 0411-1) and have left the factory in a perfectly
and to ensure safe operation, the user must follow the instructions contained in this manual.
Connection and maintenance work may only be performed by adequately qualified personnel
and only when the power supply is switched off.
Important:
If the safety instructions are not followed, it is possible that the sensor will not deliver a
speed signal !!!
3.2
EMI
The sensor complies with all relevant regulations, as determined by the Policy of the European
Committee for Electrotechnical Standardization (CENELEC), for the Electromagnetic Compa-
tibility (2014/30/EU). Testing and inspection have been performed according to Standards
EN 61326-1 and EN IEC 61326-3-2. Thereby, the product meets all requirements to be marked
by the CE sign.
For space reasons, the sensor is marked by its model No. but does not carry the CE-mark.
3.3
Safety note about metallic abrasion in the machine
Metallic (ferromagnetic) abrasion may adhere to the front of the sensors when the machine is at
standstill. It must be ensured by appropriate measures (oil filter, if the sensors are mounted in oil
or mounting the sensors on the top of the machine) that this does not happen.
Otherwise it is possible that the sensor will not provide a speed signal when the machine
restarts.
In general, the circulation of the oil or the air draft when starting the machine removes the metal
abrasion from the sensor. Subsequently, the sensor must be recalibrated by switching off and on
its power supply.
3.4
Safety Notes on Installation
3.4.1
Initial Commissioning and Installation
After the sensor has been mounted and the air gap checked, the sensor must be recalibrated to
the current air gap.
The sensor is recalibrated by switching off and on its power supply.
3.5
Safety Notes on Operation
Chapter 3.3 has to be observed, too.
3.5.1
Machine Maintenance or Overhaul
If the air gap has been changed or the air gap has been checked, e.g. with a feeler gauge, the
sensor must be recalibrated to the current air gap.
The sensor is recalibrated by switching off and on its power supply.
3.5.2
No speed pulses after Stop and Restart of the machine
If the machine has been stopped for longer, metallic debris may have accumulated in front of the
sensor. If the sensor does not give pulses after the restart, it must be recalibrated.
Note: the turning rotor of the machine normally removes the debris in front of the sensor.
The sensor is recalibrated by switching off and on its power supply.
A5S1-n-Manual_EN_Rev03
safe
condition.
To maintain this condition
2022_MAR_18
Page 38 of 42
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