KERN & SOHN OEX User Manual

KERN & Sohn GmbH

Ziegelei 1

D-72336 Balingen

E-Mail: [e-mail]

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

Internet: www.kern-sohn.com

Operating manual

KERN OEX

Version 1.1

10/2014
GB

Platform balance

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

Doc.No.OEX-BA-e-1411

KERN OEX

Platform balance

GB

Version 1.1 10/2014

Operating manual

Contents

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

2 Intended use for OEX balances ......................................................................... 4

3 Design of OEX balances with one weighing cell ............................................. 4

5 ATEX marking – meaning of icon ..................................................................... 7

6 Installation instruction for balance ................................................................... 9

7 Changing the installation site for the balance ............................................... 13

8 Cleaning and maintenance .............................................................................. 14

9 Technical examination ..................................................................................... 15

2 Doc.No.OEX-BA-e-1411

1 Pay attention to the instructions in the Operation Manual

Carefully read this operation manual befor e setup and
commissioning, even if you are already familiar with

Conformity with these operating instructions is a precautionary measure for the safe
operation of IEX balances in ex-protected spaces.

Employees should familiarize themselves with the device’s components described in
the operating instructi o ns :

• Display KEX-TM

• Power unit IEX-A01-U, IEX-A01-E

These operating instru c ti ons 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

KERN balances.
All language versions contain a non-binding

translation.
The original German is binding.

• Marking essential paragraphs dealing with explosion protec t ion

These operating instructions may be supplemented by additional warnings and safety
information provided by KERN.
All employees must be inform ed abo ut new supplements added to these oper ati ng
instructions.

Doc.No.OEX-BA-e-1411 3

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

o

2 Intended use for OEX balances

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 non­and 2 where

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

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

3 Design of OEX balances with one wei ghing cell

4 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, positioned outside the hazardous zone

• Weighing cell executed as ex-model

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

The display unit of the KEX-TM series is connected by a cable to the integrated
dynamometer (a weighing cell) of the platform. The platform bal a nc e compr is es a
weighing pan made of stainles s st eel pr oviding sufficient protecti on and al l owing
easy cleaning. The balances of the OEX series have a stainless steel weighing cell
providing advanced sturdiness against damaging influences in the 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 hazardous area. 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 disc harge). The housing is connected electrically to the platform
balance by a steel tube.

4 Doc.No.OEX-BA-e-1411

Safe area

Ex-protected area

1 load cell balance

The balances of the OEX series are equipped with a KEX-TM display unit.

Doc.No.OEX-BA-e-1411 5