KERN & SOHN OEX - Manual (Page 4)

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 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 OEX balances with one weighing 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 balance comprises a
weighing pan made of stainless steel providing sufficient protection and allowing
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 discharge). The housing is connected electrically to the platform
balance by a steel tube.
4 Doc.No.OEX-BA-e-1411