Special Instructions; Installation Instructions - Endress+Hauser PROline Prosonic Flow 93 Ex-Dokumentation Zu Den Betriebsanleitungen

PROline Prosonic Flow 93
Endress+Hauser

Special instructions

1. The flowmeter must be integrated into the potential equalisation system.
Potential must be equalized along the intrinsically safe sensor circuits.
2. Devices connected to terminals Nos. 20 to 27 of the Prosonic Flow 93 transmitter
must be rated for U
m
93P**-***********S/T with intrinsically safe output circuits).
3. The specified temperature class/surface temperature in conjunction with the ambi-
ent temperature and the medium temperature must be in compliance with the tables
on Page 3.
4. The following rules apply for connecting the electronics housing of the EEx d rated
version:
Use only specially approved cable glands and cable entries (EEx d IIC), suitable for
operating temperatures up to 80 °C.
If conduit entries are used, the seals must be positioned immediately adjacent to the
housing.
5. The following rules apply for connecting the electronics housing of the EEx e rated
version:
Use only specially approved cable glands and cable entries (EEx e), suitable for
operating temperatures up to 80 °C and having an IP 67 protection rating.
6. The service adapter must not be connected in explosive atmospheres.
7. Seal cable entries tight.

Installation instructions

• If the category "ia" intrinsically safe circuits of the flowmeters are connected to certi-
fied intrinsically safe category "ib" circuits with explosion group IIC resp. IIB ratings,
the ignition protection rating changes to EEx ib IIC resp. EEx ib IIB, as applicable.
Intrinsically safe category "ib" circuits are suitable for use in environments that require
category 2 equipment.
• Zone 21:
The surface temperature of the measuring device must not exceed 2/3 of the ignition
temperature of a dust cloud. The maximum surface temperature must maintain a
safety distance of 75K for the glow temperature of a dust layer of 5 mm.
Example: a configuration of temperature class T4 (135 °C) is thus suitable for dust with
an ignition temperature of 202.5 °C (1.5 x 135 °C) and a glow temperature of 210 °C
(135 °C + 75 °C).
• Active intrinsically safe communication circuits (I/O-option S, terminals 26/27); if they
are led into areas, which require electrical equipment of category 1D or 2D, the con-
nected equipment has to be approved and certified accordingly.
= 260 V und I = 500 mA (does not apply to Prosonic Flow
m
<
5