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GE Masoneilan 469 Series Instruction Manual page 14

Position transmitter and limit switch
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7.
Electrical Connection, Installation and Start-up (Contd)
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 "d" and "tb"
protection mode.
Nota:
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.
14 | BHGE
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.
© 2018 Baker Hughes, a GE company. All rights reserved.

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