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 weighing cell
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 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.IEX-BA-e-1412
