Cameron NUFLO MC-III EXP, User Manual

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17
MC-III™ EXP Flow Analyzer Section 2
Hazardous Area Installations (CSA)
The CSA-approved MC-III EXP has been certified as explosion proof for Class I, Division I, Groups B, C,
and D for use in the US and Canada.
Conditions for Safe Use (CSA)
• The device may be used in the presence of flammable gases and vapours with apparatus groups B, C, and
D and with temperature classes T1, T2, T3, T4, T5, and T6.
• The device is certified for use in ambient temperatures in the range -40°C to 70°C and should not be used
outside this range.
• Do not remove the cover unless the area is void of combustible gas and vapors.
• Before removing the pipe plug to install a communications adapter, or disassembling the union nut and
blanking plug in a pre-installed communications adapter, make sure the area is nonhazardous. Reinstall
the pipe plug in accordance with the instructions in this manual.
• All field wiring must conform to the National Electrical Code, NFPA 70, Article 501-4(b) for installations
within the United States or the Canadian Electric Code for installations within Canada. State and local
wiring ordinances may also apply. All field wiring must be rated for temperatures of 90°C or higher, and
have a wire range of 22 to 14 AWG. Terminal block screws must be tightened to a minimum torque of 5
to 7 in-lb. to secure the wiring within the terminal block. Only personnel who are experienced with field
wiring should perform these procedures.
• Do not use Teflon
®
tape on threads of the union, reducer, or pipe plugs. Use of Teflon
®
tape will void the
explosion-proof rating of the instrument.Replace the lithium battery only with the CSA-approved battery
supplied by Cameron (Part No. 9A-100005111).
• Replace the optional alkaline battery pack only with the CSA-approved battery pack supplied by Cameron
(Part No. 9A-50099002).
• The lithium battery that powers the MC-III EXP is a sealed unit; however, should a lithium battery
develop a leak, toxic fumes could escape upon opening the enclosure. Ensure that the instrument is in a
well-ventilated area before opening the enclosure to avoid breathing fumes trapped inside the enclosure.
Exercise caution in handling and disposing of spent or damaged batteries.
Mounting Options (CSA)
The CSA-approved MC-III EXP is available in either of two enclosure styles. The standard enclosure shown
on the cover of this manual and in
Figure 2.5, page 18,
features integral mounting holes on either side of the
enclosure, allowing it to be mounted to a flat bulkhead.
The alternate enclosure (
Figure 2.6, page 18
) does not have the bulkhead mounting holes on the sides. Another
distinguishing feature is the bright red ring that frames the display window. The alternate enclosure is slightly
taller than the standard enclosure.
The MC-III EXP may be mounted directly to a flowmeter, or mounted remotely on a pole and connected to a
flowmeter with explosionproof signal cable. The type of meter mount required varies with the meter in use.
See
Figure 2.5
through
Figure 2.7
for installation dimensions.
• Mount the device to a NuFlo turbine meter or a Barton 7000 Series turbine meter. A CSA-approved pipe
reducer and union connector is required (
Figure 2.5, page 18
).
Figure 2.6, page 18,
shows the same installa-
tion with the alternate MC-III enclosure.
If mounting to the Barton 7000 Series meter, a 3/4-in. to 1-in. reducer supplied with the meter is used to
achieve the 3/4-in. connection required to mate the union to the meter.