UMG70XV3-4EN 12.01.2009 15
2 Safety Instructions according to Directive 94/9/EC
2.3 Use of Ultrasonic Transducers in Explosive Atmosphere
(Zone 1/Zone 21)
Observe the specified operating and explosion protection tempera-
tures of the transducers. For the explosion protection temperatures
see table on the following page.
The transducers
**M1N31, **P1N31, **Q1N31, **K1N31, **K1N41,
**G1N31, **G1N41, **K1N33, **K1N43, **G1N33,
**G1N43, **H1N33, **H1N43, **M2N41, **P2N41,
**M1N43, **P1N43, **M2E45, **P2E45, **K1N71,
**K1N81, **G1N71, **G1N81, **K1N73, **K1N83,
**G1N73, **G1N83, **H1N73, **H1N83, **M2N81,
**P2N81, **M1N83, **P1N83, **K1LI1, **G1LI1
**M2LI1, **P2LI1, **M2E85, **P2E85, **Q2E85,
**Q2N81, **Q1N83
can be used in explosive atmosphere in zones 1, 2, 21 and 22.
The transducers listed above can be connected to the flowmeter of
the FLUXUS series.
The flowmeter either has to be located outside of the explosive atmo-
sphere or has to be checked and approved separately for explosion
protection.
All cable connections either have to be located outside of the explo-
sive atmosphere or have to be used with equipment checked and ap-
proved for explosion protection.
The transducers may be used in explosive atmosphere only under
the following conditions:
• the transducers are fixed to a pipe or to the surface of a vessel
• the contact surface of every transducer is directed towards the sur-
face of the pipe or of the vessel on which it is mounted
If an equipotential bonding of the transducers is necessary, the
ground terminal of the transducer housing has to be used.
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