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Section 2 Scanner
®
2000 microEFM
Wiring Precautions
CAUTION In accordance with EN60079-0, Clause 16.5, all cable and cable glands must be rated for
80ºC. The Scanner 2000 may be tted as a remote unit when all the cable entries are t-
ted with ameproof glands that have been suitably certied by a notied body.
CAUTION When a stand off tube is used to connect a turbine meter to an ATEX-approved Scanner
2000, it shall be used only with the turbine meter pick off coil bosses listed in certicate
03ATEX1474U.
RTD Assembly Options (for Gas and Liquid Flow Runs Only)
The process temperature input is typically supplied by an RTD installed in a thermowell downstream of the
primary differential pressure source. The location of the thermowell should conform to the relative standard
to ensure accurate measurement. Use only an RTD assembly that is tted with a suitably certied, EX d IIC,
cable entry gland, such as the ameproof RTD listed in Table 6.2, page 84 (Part No. 9A-X-TTXR-0003).
Class I, Div. 1 (CSA) Installations
The Scanner 2000 is CSA-certied as explosion-proof for Class I, Division 1, Groups B, C and D hazardous
locations when sold individually. The Scanner is certied for Class I, Division 1, Groups C and D when sold
with a Model TH4 terminal housing.
Wiring Precautions
CAUTION All signal cable from other devices and power must be installed in accordance with lo-
cal wiring practices for area classication. The cable used between the Scanner 2000
and other devices must be either armored MC-HL type cable or standard cable routed
through conduit. If standard cable is used, a conduit seal must be installed within 18
inches of the Scanner.
When the Scanner 2000 is sold with a Model TH4 terminal housing, no conduit seal is
required between the two devices.
RTD Assembly Options (for Gas and Liquid Flow Runs Only)
The process temperature input is typically supplied by an RTD installed in a thermowell downstream of the
primary differential pressure source. The location of the thermowell should conform to the relative standard to
ensure accurate measurement. A 2-wire, 3-wire, or 4-wire RTD assembly may be used.
Cameron’s Barton Model 21 RTD, a 4-wire, 100-ohm explosion-proof RTD assembly, can be connected to the
Scanner 2000 enclosure without conduit or a conduit seal. For details, see Explosion-Proof RTD Assembly
(CSA, Class I, Div. 1), page A-3.
RTDs that do not carry the explosion-proof rating can be used if they are routed through conduit and a conduit
seal is installed within 18 inches of the Scanner 2000.
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