YOKOGAWA AXFA14C User Manual

<10. Explosion Protected Type Instrument>
84
IM 01E20A01-01EN
Followtheprocedurebelowwhenaameproofpacking
adapter (optional code G12, G11, G14 or G13) is applied.
Refer to Figure 10.5.3.
If a blanking plug is applied, follow the same procedure
whentheameproofpackingadapterisapplied.
CAUTION
Beforetighting,conrmcablelengthfromterminalto
ameproofpackingadapterwhensetting.Onceitis
tightened, loosening and re-tightening may damage its
sealing performance.
(a) Loosen the locking screw and remove the terminal
box cover.
(b) Measure the cable outer diameter in two directions to
within 0.1 mm.
(c) Calculate the average of the two diameters, and use
packing with an internal diameter nearest to this value
(see the table of Figure 10.5.1).
(d) Screwtheameproofpackingadapterintothe
terminal box until the O-ring touches the wiring port
(atleast6fullturns),andrmlytightenthelocknut.
(e) Insert the cable through the union cover, the union
coupling, the clamp nut, the clamp ring, the gland, the
washer, the rubber packing, and the packing box, in
that order.
(f) Insert the end of the cable into the terminal box.
(g) Tighten the union cover to grip the cable. When
tightening the union cover, tighten approximately
one turn past the point where the cable will no longer
move up and down.
Proper tightening is important. If it is too tight, a circuit
break in the cable may occur; if not tight enough, the
ameproofeffectivenesswillbecompromised.
(h) Fasten the cable by tightening the clamp nut.
(i) Tighten the lock nut on the union cover.
(j) Connect the cable wires to each terminal.
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Adapter body
Rubber packing
Washer
Packing box
Gland
Clamp ring
Clamp nut
Union coupling
Union cover
Wrench
O-ring
Lock nut
Wrench
Lock nut
Cable
Apply a
non-hardening
sealant to the threads
for waterproofing.
Figure 10.5.3 Installing Flameproof Packing Adapter
(2-2) Cable Wiring Using Flameproof Metal
Conduit
• Asealttingmustbeinstalledneartheterminalbox
connection port for a sealed construction.
• Apply a non-hardening sealant to the threads of the
terminalboxconnectionport,exiblemetalconduit
andsealttingforwaterproong.
• Every wiring port must apply the same wiring as
Figure 10.5.4.
Apply a blanking plug to the unused wiring port of a
24V power supply version when a four-wire cable is
used for both power input and signal output.
If the blanking plug is necessary, always purchase it
(parts number: G9330DP) from Yokogawa.
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Non-hazardous
area
Hazardous
area
Flameproof
heavy-gauge
steel conduit
Tee
Drain plug
Seal fitting
Gas sealing
device
Flameproof flexible
metal conduit
After wiring, impregnate the
fitting with a compound to seal tubing.
Apply a non-hardening
sealant to the threads
of these fittings for
waterproofing
Apply a blanking
plug to the unused
wiring port
Figure 10.5.4 Typical Wiring Using Flameproof Metal
Conduit

YOKOGAWA AXFA14C Specifications

General

Brand	YOKOGAWA
Model	AXFA14C
Category	Measuring Instruments
Language	English