JUMO 404720, Operating Instructions Manual

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6
2 Introduction
2 Introduction
2.1 General information
DANGER!
The declaration of conformity, the examination certificate (both found at the end of this operating
manual), and the relevant regulations for sensors and supply units in potentially explosive areas
must be observed!
The sensors must only be operated on intrinsically safe electrical circuits appropriate for the version.
 The admissible values can be found in the certificate.
The type 404720 meets the requirements:
•
of device group II in the potentially explosive area of zones 1 and 2
• of device group III in the potentially explosive area of zones 21 und 22
The test certificate number of the EU type examination certificate is:
SEV 21 ATEX 0537 X
The certificate number of the IECEx certificate of conformity is:
IECEx SEV 21.0011X
CAUTION!
Do not damage the membrane of the pressure transmitter!
The followings measures must be observed:
•
Do not insert any articles into the pressure connection hole!
• Do not direct the pressure blast at the membrane!
• Do not deform the membrane. Under certain circumstances, even touching the membrane with your
fingers may cause damage.
• The pressure to be measured must not exceed the admissible overpressure of the pressure trans-
mitter even at pressure peaks. Very high pressure peaks (water hammer) may damage the pressure
transmitter. Under these conditions, take the appropriate measures (e.g. insert a damping element).
CAUTION!
In order to prevent damage to the pressure transmitter and to safeguard the process, mounting,
installation, and startup must only be performed by qualified personnel. Personnel must be fa-
miliar with country-specific regulations and be aware of applied standards and directives to pre-
vent bodily injuries and material damage.

Qualified personnel must have read the operating manual, noted the nameplate and understood
both so that the instructions can be followed. Modifications and repairs must only be carried out if the
operating manual permits it.
Keep the operating manual at a location that is readily accessible to all users.