ABB 266D Series Short Form Instruction Manual page 5

... INSTALLATION
Transmitter
The transmitter can be flanged directly to the shut-off valve. A mounting bracket for wall or pipe mounting (2" pipe) available as an
accessory.
Mount the transmitter in such a way that the process flange axes are vertical (horizontal in case of barrel-type aluminum housing) in
order to avoid zero shifts. If the transmitter is installed at an incline, the hydrostatic pressure of the filling fluid would exert pressure
on the measuring diaphragm and thus cause a zero shift! A zero point correction would then be necessary. Pressure transmitters can
be mounted in any position.
Seal unconnected process connections on the sensor with the enclosed screw plugs (1/4-18 NPT). For this purpose, use your officially
approved sealing material.
Hazardous Area Considerations
The transmitter must be installed in hazardous area only if it is properly certified. The certification plate is permanently fixed on the
side of the transmitter top housing (as shown by the figure).
The 266 Pressure Transmitter Line can have the following certifications:
ATEX INTRINSIC SAFETY
II 1 G Ex ia IIC T6 and II 1/2 G Ex ia IIC T6
II 1 D Ex iaD 20 T85°C and II 1/2 D Ex iaD 21 T85°C
ATEX EXPLOSION PROOF
II 1/2 G Ex d IIC T6 and II 1/2 D Ex tD A21 IP67 T85°C
ATEX TYPE "N" / EUROPE:
II 3 G Ex nL IIC T6 and II 3 D Ex tD A22 IP67 T85°C
COMBINED ATEX, ATEX FM and FM Canada
See detailed classifications
FM Approvals US and FM Approvals Canada:
Explosionproof (US): Class I, Div. 1, Groups A, B, C, D
Explosionproof (Canada): Class I, Div. 1, Groups B, C, D
Dust ignitionproof : Class II, Div. 1, Groups E, F, G
Nonincendive: Class I, Div. 2, Groups A, B, C, D
Intrinsically safe: Class I, II, III, Div. 1, Groups A, B, C, D, E, F, G
Class I, Zone 0, AEx ia IIC T6/T4 (FM US)
Class I, Zone 0, Ex ia IIC T6/T4 (FM Canada)
IEC (Ex):
See ATEX detailed classifications
INTRINSIC SAFETY/CHINA
NEPSI approval Ex ia IIC T4-T6
FLAMEPROOF/CHINA
NEPSI approval Ex d IIC T6
GOST (Russia), GOST (Kazakistan), Inmetro (Brazil)
based on ATEX.
Housing rotation
To improve field access to the wiring or the readability of the optional
LCD meter, the electronic housing may be rotated through 360°.
A stop prevents the housing from being turned too far.
Fig. 3 Housing rotation
Fig. 2 Certification plate
Integral Display rotation
In case an optional integral display meter is installed, it is possible
to mount the display in four different positions rotated clockwise
or counterclockwise with 90° steps.
Fig. 4 Display rotation
2600T Series Pressure transmitters 266 models | SOI/266-XC 5