MBA Instruments MBA888 Operating Instruction

MBA888
Level switch
for bulk materials

Installation, operation

MBA Instruments GmbH

Friedrich-List-Str. 5
D-25451 Quickborn
Germany
Telephone [phone] – 0
Fax +49 ( 0) 4106 123 888 – 9
[e-mail]
www.mba-instruments.de

Operating instructions MBA888

Operating instructions MBA888

09/2015

Page 2 / 6

MBA Instruments GmbH

[e-mail]

Safety information - for use in areas at risk of explosion (Ex Zones) 1.

A level indicator of type MBA888 is only suitable for use in potentially explosive areas if the individual device specification
permits this.
 Check device on the basis of the type plate for approval (ATEX).

An approved device bears the identification:

II 1/2 D Ex ta/tb IIIC T100°C Da/Db

 A suitable safety fuse with min. 1500A switch-off delay must be connected upstream.
 Observe the specifications of the approvals. The EC type examination certificate is an integral part of the operating

instructions.

 Install equipotential bonding lead.
 Prevent sparks forming due to striking metal parts.
 Perform installation in accordance with the standard EN 60079-14
 Observe zone separation (see section 3)
 Only lay electrical installations in a suitable terminal enclosure.
 The enclosure must not be opened.
 With process temperatures in excess of 60°C it is necessary to implement suitable measures, to ensure that the enclosure

temperature does not exceed a temperature of 60°C at the cable connection point at this process temperature.

Responsibility of the user 2.

 Only use the device in the manner described in these operating instructions. The manufacturer accepts no responsibility

and provides no warranty cover in case of any other uses.

 In addition to these operating instructions, also observe all local laws, technical rules and internal company instructions

that apply at the place of use of the device.

 Observe the specifications regarding voltage and temperature on the type plate.

Use 3.

The MBA888 is used as a level switch for all types of bulk materials. The device is only intended for fixed installation in
industrial plants (large tools). The device is designed for zone 21. Furthermore, the shaft end and blade can be fed into zone
20, if a partition wall is installed over the process connection and the requisite leak-tightness is established with the
installation. The leak-tightness of the process connection in terms of the zone separation has not been tested within the
framework of EC type testing and must be ensured by the user.

Conformity: 4.

Explosion protection, general requirements: ...................... EN 60079-0 :2012

Device dust explosion protection through enclosure "t" .... EN 60079-31:2014 + A11:2013

EMC .... ................................................................................. EN 61000-6-4: Sept. 2011 (industrial area)

.................................................................... ........................ EN 61000-6-2: March 2006 (industrial area)

Vibration: .................................... ........................................ IEC 60068-2-6, IEC 60068-2-27

Low voltage: .................................................................... .... EN 61010-1: 2011

Protection level Da for
dust Ex Zone 20, 21 or 22
max. 80°C

Protection level Db for
dust Ex Zone 21 or 22
max. 60°C

Zone separation

Process connection seal:
Klingersil C-4400
60 x 49 x 2 mm

Undercut per DIN 509-E

Process connection G 1 ½"