KERN IEX Operating Manual

KERN & Sohn GmbH

Ziegelei 1

D-72336 Balingen

E-Mail: [e-mail]

Phone: +49-[0]7433- 9933-0

Fax: +49-[0]7433-9933-149

Internet: www.kern-sohn.com

Operating manual

Platform balance

KERN IEX

Version 1.2

10/2014
GB

Doc.No.IEX-BA-e-1412

GB

KERN IEX

Version 1.2 10/2014

Operating manual

Platform balance

Contents

1 Pay attention to the instructions in the Operation Manual ............................. 3

2 Intended use of IEX scales ................................................................................ 4

3 Design of IEX scales with one weighing cell ................................................... 4

4 ATEX marking – meaning of icon ..................................................................... 6

5 How to install the balance ................................................................................. 8

6 Changing the installation site of the balance ................................................ 11

7 Cleaning and maintenance .............................................................................. 12

8 Technical examination ..................................................................................... 13

2 Doc.No.IEX-BA-e-1412

1 Pay attention to the instructions in the Operation Manual

Carefully read this operati on ma nual be fore setup and
commissioning, even if you are already familiar with
KERN balances.

All language versions contain a non-binding
translation.

The original German is binding.

Conformity with the specifications stated in these operating instructions is a
precautionary measure for the safe operation of OEX scales in explosion protected
spaces.

Employees should familiarize themselves with the device’s components described in
the operating instructions:

• Display KEX-TM

• Power unit IEX-A01-U, IEX-A01-E

These operating instructions should be freely available for consultation to the
employees.

The operating instructions contain the icons shown below:

• Continuously prescribed actions

• Actions prescribed under certain circumstances

• Marking essential paragraphs dealing with explosion protection

These operating instructions may be supplemented by additional warnings and safety
information provided by KERN.
All employees must be informed about new supplements added to these operating
instructions.

Doc.No.IEX-BA-e-1412 3

2 Intended use of IEX scales

Load in ex-protected spaces. It is possible to tare the balance over the entire working
range, thus allowing determination of the net weight.
The design of the balance (construction of non-electrical part of the platform balance
and material used) is in conformity with Directive 94/9/EE, applicable in countries of
the European Union.

• Due to their design, the balances of the IEX series can be used with
a non-

electrical part on the platform and the material used in zones 1

and 2 where

o gasses, mixtures of gasses, vapour types IIA, IIB or IIC
o or explosive groups can develop,

o

as well as for temperature classes T1, T2, T3 or T4.

3 Design of IEX scales with one wei ghing c e ll

The construction of balances with one weighing cell of the IEX series is based on the
modular design principle and comprise:

• Display KEX-TM

• Power unit IEX-A01 by KERN, outside hazardous area

• Weighing cell executed as ex-model

• Weighing platform, non-electric, mechanical balance component.

The display unit for series KEX-TM is connected by a cable to the dynamometric
sensor (one weighing cell) integrated in the platform. The platform balance comprises
a weighing pan made of stainless steel providing sufficient protection and allowing
easy cleaning. The series IEX comprises an aluminium weighing cell, guaranteeing
advanced sturdiness against damaging influences and ambient conditions.
The cable used for connecting the weighing cell to the display unit is protected by a
rod or approx. 3 m long tube.
The display unit is supplied with energy by the KERN mains adapter IEX-A01
positioned outside the haz ar dous ar ea. The mains adapter is plugged into the mains
power supply of 230V.
The housing of the display unit has a marked terminal for the PE conductor
(electrostatic dischar g e) . The housing is connected electrically to the platform
balance by a steel tube.

4 Doc.No.IEX-BA-e-1412