FISCHER NK105 User manual

Operating manual
NK10 ... H
Fill Level Limiter
for use in explosive areas
Gas explosion protection Zone 1 and 2
Dust explosion zone 21 and 22
09005112 BA_EN_NK10_H ST4-C 04/17 *09005112*

| Masthead FISCHER Mess- und Regeltechnik GmbH
2 / 36 BA_EN_NK10_H_ST4-C
Masthead
Manufacturer: FISCHER Mess- und Regeltechnik GmbH
Bielefelderstr. 37a
D-32107 Bad Salzuflen
Telefon: [phone]
Telefax: [phone]
eMail: [email protected]
web: www.fischermesstechnik.de
Technical editorial team: Documentation representative: S. Richter
Technical editor: R.Kleemann
All rights, also those to the translation, reserved. No part of these instructions
may be reproduced or processed, duplicated or distributed using electronic sys-
tems or any other form (print, photocopy, microfilm or another process) without
the written consent of the company FISCHER Mess- und Regeltechnik GmbH,
Bad Salzuflen.
Reproduction for internal use is expressly allowed.
Brand names and procedures are used for information purposes only and do
not take the respective patent situation into account. Great care was taken
when compiling the texts and illustrations; nevertheless, errors cannot be ruled
out. The company FISCHER Mess- und Regeltechnik GmbH will not accept any
legal responsibility or liability for this.
Subject to technical amendments.
© FISCHER Mess- und Regeltechnik 2015
Version history
Rev. ST4-A 01/15 Version 1 (first edition)
Rev. ST4-B 06/16 Version 2 (Correction)
Rev. ST4-C 04/17 Version 4 (Dimensional drawings changed)

FISCHER Mess- und Regeltechnik GmbH Table of Contents
BA_EN_NK10_H_ST4-C iii
Table of Contents
1 Safety guidelines........................................................................................................................................... 4
1.1 General....................................................................................................................................................4
1.2 Personnel Qualification ...........................................................................................................................4
1.3 Risks due to Non-Observance of Safety Instructions..............................................................................4
1.4 Safety Instructions for the Operating Company and the Operator ..........................................................4
1.5 Unauthorised Modification.......................................................................................................................5
1.6 Inadmissible Modes of Operation............................................................................................................5
1.7 Safe working practices for maintenance and installation work................................................................5
1.8 Pictogram explanation.............................................................................................................................5
2 Product and functional description............................................................................................................. 6
2.1 Delivery scope.........................................................................................................................................6
2.2 Explosion hazard area classification .......................................................................................................6
2.3 Function diagram.....................................................................................................................................6
2.4 Design and mode of operation ................................................................................................................7
3 Installation and assembly ............................................................................................................................ 8
3.1 Safety guidelines .....................................................................................................................................8
3.2 Valid range ..............................................................................................................................................8
3.3 Process connection .................................................................................................................................8
3.4 Electrical connections..............................................................................................................................9
4 Commissioning ........................................................................................................................................... 11
4.1 Safety guidelines ...................................................................................................................................11
4.2 Generalities ...........................................................................................................................................11
4.3 Function test..........................................................................................................................................11
5 Servicing ...................................................................................................................................................... 12
5.1 Maintenance..........................................................................................................................................12
5.2 Transport ...............................................................................................................................................12
5.3 Service ..................................................................................................................................................12
5.4 Disposal.................................................................................................................................................12
6 Technical data ............................................................................................................................................. 13
6.1 General..................................................................................................................................................13
6.2 Application conditions............................................................................................................................13
6.3 Switch contacts .....................................................................................................................................14
6.4 Measurement accuracy .........................................................................................................................14
6.5 Directives and certificates .....................................................................................................................14
6.6 Construction design...............................................................................................................................14
7 Order Codes ................................................................................................................................................ 20
8 Attachments ................................................................................................................................................ 21
8.1 Declaration of Conformity......................................................................................................................21
8.2 Type testing certificates.........................................................................................................................23
8.3 DIN CERTCO Certification DIN 4754-3.................................................................................................31
8.4 EAC Declaration....................................................................................................................................33

1 | Safety guidelines FISCHER Mess- und Regeltechnik GmbH
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1 Safety guidelines
1.1 General
WARNING This operating manual contains instructions fundamental to the installation, op-
eration and maintenance of the device that must be observed unconditionally. It
must be read by the assembler, operator and the specialized personnel in
charge of the instrument before it is installed and put into operation.
This operating manual is an integral part of the product and therefore needs to
be kept close to the instrument in a place that is accessible at all times to the
responsible personnel.
The following sections, in particular instructions about the assembly, commis-
sioning and maintenance, contain important information, non-observance of
which could pose a threat to humans, animals, the environment and property.
The instrument described in these operating instructions is designed and manu-
factured in line with the state of the art and good engineering practice.
1.2 Personnel Qualification
The instrument may only be installed and commissioned by specialized person-
nel familiar with the installation, commissioning and operation of this product.
Specialized personnel are persons who can assess the work they have been
assigned and recognize potential dangers by virtue of their specialized training,
their skills and experience and their knowledge of the pertinent standards.
WARNING For explosion-proof models the specialized personnel must have received spe-
cial training or instruction or be authorized to work with explosion-proof instru-
ments in explosion hazard areas.
1.3 Risks due to Non-Observance of Safety Instructions
Non-observance of these safety instructions, the intended use of the device or
the limit values given in the technical specifications can be hazardous or cause
harm to persons, the environment or the plant itself.
The supplier of the equipment will not be liable for damage claims if this should
happen.
1.4 Safety Instructions for the Operating Company and the Operator
The safety instructions governing correct operation of theinstrument must be
observed. The operating company must make them available to the installation,
maintenance, inspection and operating personnel.
Dangers arising from electrical components, energy discharged by the medium,
escaping medium and incorrect installation of the device must be eliminated.
See the information in the applicable national and international regulations.
Please observe the information about certification and approvals in the Tech-
nical Data section.
The instrument must be decommissioned and secured against inadvertent re-
operationif a situation arises in which it must be assumed that safe operation is
no longer possible. Reasons for this assumption could be:
▪ evident damage to the instrument
▪ failure of the electrical circuits
▪ longer storage outside the approved temperature range.
▪ considerable strain due to transport

FISCHER Mess- und Regeltechnik GmbH Safety guidelines | 1
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Repairs may be carried out by the manufacturer only.
A professional single conformity inspection as per DIN EN 61010, section 1,
must be carried out before the instrument can be re-commissioned. This in-
spection must be performed at the manufacturer's location. Correct transport
and storage of the instrument are required.
1.5 Unauthorised Modification
Modifications of or other technical alterations to the instrument by the customer
are not permitted. This also applies to replacement parts. Only the manufac-
turer is authorised to make any modifications or changes.
1.6 Inadmissible Modes of Operation
The operational safety of this instrument can only be guaranteed if it is used as
intended. The instrument model must be suitable for the medium used in the
system. The limit values given in the technical data may not be exceeded.
The manufacturer is not liable for damage resulting from improper or incorrect
use.
1.7 Safe working practices for maintenance and installation work
The safety instructions given in this operating manual, any nationally applicable
regulations on accident prevention and any of the operating company's internal
work, operating and safety guidelines must be observed.
The operating company is responsible for ensuring that all required mainten-
ance, inspection and installation work is carried out by qualified specialized per-
sonnel.
1.8 Pictogram explanation
DANGER Type and source of danger
This indicates a direct dangerous situation that could lead to death or serious
injury (highest danger level).
a) Avoid danger by observing the valid safety regulations.
WARNING Type and source of danger
This indicates a potentially dangerous situation that could lead to death or ser-
ious injury (medium danger level).
a) Avoid danger by observing the valid safety regulations.
CAUTION Type and source of danger
This indicates a potentially dangerous situation that could lead to slight or seri-
ous injury, damage or environmental pollution (low danger level).
a) Avoid danger by observing the valid safety regulations.
NOTICE Note / advice
This indicates useful information of advice for efficient and smooth operation.