FISCHER NK21 Operating Instructions Manual

Operating Instructions
NK21 Conductive level control switch

Table of contents

1 Safety instructions
2 Intended applications
3 Product description and functions
4 Installation
5 Commissioning
6 Operation
7 Maintenance
8 Transport
9 Service
10 Accessories
11 Disposal
12 Technical specifications
13 Dimensioned drawings
14 Ordering code
15 Declaration of conformity
1 Safety instructions
1.1 General
This manual contains detailed information about the
product and instructions
operation and maintenance. Operators and other
technical personnel responsible for the equipment
must read this thoroughly before attempting to
install or operate this equipment. A copy of this
manual must always be kept accessible at the place
of work for reference by concerned personnel.
Chapter 1 (sections 1.2 through 1.7) contains
general as well as specific safety instructions.
Chapters 1 through 11, covering topics ranging
from intended purpose of the equipment to its final
disposal, also include important points relating to
safety. Overlooking or ignoring any of these safety
points can endanger humans and animals, and
possibly cause damage to other equipment.
1.2 Personnel qualification
Personnel responsible for installation, operation,
maintenance and inspection of this product must
have the qualifications, training and experience
necessary to carry out such work on this type of
equipment.
for its installation,
1.3 Risks of disregarding safety instruc-
tions
Disregarding safety instructions, use of this product
for purposes for which it is not intended, and/or op-
eration of this product outside the limits specified for
any of its technical parameters, can result in harm
to persons, the environment, or the plant on which it
is installed. Fischer Mess- und Regeltechnik GmbH
will not be responsible for consequences in such
circumstances.
1.4 Safety instructions for operators
Safety instructions for the proper use of this product
must be followed. This information must be availa-
ble at all times by personnel responsible for installa-
tion, operation, maintenance and inspection of this
product. Adequate steps must be taken to prevent
the occurrence of hazardous conditions that can be
caused by electric energy and the convertible ener-
gy of the process media. Such conditions can, for
example, be the result of improper electrical or pro-
cess connections. Detailed information is available
in relevant published norms (DIN EN, UVW in Ger-
many; and equivalents in other countries), industrial
standards such as DVWG, Ex-, GL-,
VDE guidelines, as well as regulations
of the local authorities (e.g., EVUs in
Germany).