Special Conditions; General Warnings - Endress+Hauser PROline prosonic flow 93 Documentation Technique

PROline Prosonic Flow 93



Endress+Hauser

Special conditions

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
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3. The specified temperature class in conjunction with the ambient 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 cables and cable entries (EEx d IIC), suitable for oper-
ating 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 cables 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.
Note:
7. If the category "ia" intrinsically safe circuits of the flowmeters are connected to cer-
tified 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.

General warnings

Warning:
• Installation, connection to the electricity supply, commissioning and maintenance of
the devices must be carried out by qualified specialists trained to work on Ex-rated
devices.
• Compliance with national regulations relating to the installation of devices in poten-
tially explosive atmospheres is mandatory, if such regulations exist.
• Open the device only when it is de-energized (and after a delay of at least 10 minutes
following shutdown of the power supply).
• The housing of the Ex-rated transmitter can be turned in 90° steps. Whereas the non-
Ex version has a bayonet adapter, however, the Ex version has a thread. Recesses for
centering the worm screw are provided to prevent inadvertent movement of the trans-
mitter housing.
It is permissible to turn the transmitter housing through a maximum of 180° during
operation (in either direction), without compromising explosion protection.
After turning the housing the worm screw must be fastened again.
• The screw cap has to be removed before the local display can be turned, and this
must be done with the device de-energized (and after a delay of at least 10 minutes
following shutdown of the power supply).
= 260 V und I = 500 mA angeschlossen werden.
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