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7. Electrical Connection, Installation and Start-up
(Cont'd)
7.4 Installation and start-up
7.4.1 Installation
Flameproof instrument may be installed in gas
and dust explosive atmosphere of groups IIA, IIB,
IIC and IIIC for the zones 1, 2, 21 and 22 with
"db" and "tb" protection mode.
Note:
It is under the user responsibility to check the installation against Intrinsic safety rules taking into
account entity parameters of all devices in the loop in addition of temporary one like
measurement devices.
7.4.2 Start-up
– Before power up or after doing any work on the device always check the cover (12) is fully
screwed, O-ring (10) is free of any damage and security screw (9) is well locked.
– Check that the cable gland is certified for the intended use and that the electrical data are
suitable for the operating zone.
Before start-up, proceed, if required, with instrument calibration as per §8 and/or ensure that all the
safety instructions in the preceding paragraphs have been strictly followed.
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Baker Hughes
Intrinsically safe instrument may be installed in
gas and dust explosive atmosphere of groups
IIA, IIB,
IIC and IIIC for zones 0, 1, 2, 20, 21 and 22 with "ia"
protection mode.
© 2020 Baker Hughes Company. All rights reserved.
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