IM 1E7B0-02E
12-4
12. EXPLOSION PROTECTED TYPE INSTRUMENT
(3) Operation
WARNING
• Open circuit before opening the covers.
• Take care not to generate mechanical spark
when access to the instrument and peripheral
devices in hazardous locations.
(4) Maintenance and Repair
WARNING
The instrument modification or parts replacement
by other than authorized representative of
Yokogawa Electric Corporation is prohibited and
will void the certification.
12.5 JIS
WARNING
Care should be taken to install, wiring, piping to
keep safety. This instrument is restricted to
maintenance and repair. Please read
"INSTALLATION AND OPERATING
PRECAUTIONS FOR JIS FLAMEPROOF
EQUIPMENT" in the end of this manual.
(1) Technical Data
• Construction :
:Exde[ia]IICT4X
:Terminal box; Explosion proof
Flow Tube; Increased Safety
Signal Circuit; Intrinsically Safety(ia)
Um=250VAC 50/60Hz, 250VDC
*Uo and Io are rms value.
:Ignition and Explosion Class of gas or vapour;
IICT4X
• Ambient Temperature : -20 to 60
°
C
• Fluid Temperature : 120
°
C or less
• Current Signal Circuit Allowable Voltage : 250V
AC/DC
• Grounding : 10
Ω
or less
WARNING
• In case the ambient temperature exceeds
50
°
C, use heat-resistant cables with maximum
allowable themperature of 70
°
C or above.
• Maintenance and repair of the converter should
be done in nonhazardous location after turning
off.
(2) Wiring
Flameproof packing adapter is attached to electrical
connection.
WARNING
Please use G11 or G12 (option) flameproof
packing adapter attached.
Follow the procedure for flameproof packing adapter
setting.
CAUTION
Before tightening, confirm cable length from
terminal to flameproof packing adapter when
setting. Once it is tightened, loosening and re-
tightening may damage its sealing performance.
(a)Measure the bi-direction of the cable outside
diameter to one decimal place in mm.
(b)Calculate the average of hese value, and choose the
suitable packing from attached two.[Refer to the
figure 12.5.1.]
(c)Screw the M.screw into the electrical connection.
(Ensure O-ring)
(d)Set union nut, B.coupling, clamp nut, clamp ring,
packing gland, packing case with inserted packing
and washer in that order around the cable, and
tighten packing gland. And then tighten clamp nut.
Confirm packing is compressed and cable is fixed.
(e)Insert packing gland into M.screw.
(f)Connect each wire of the cable to terminal.
(g)Tighten and fix union nut.
(h)Tighten and fix hexagon socket set screw of
M.screw and union nut.
Содержание AE100D
Страница 2: ......
Страница 333: ...Blank Page ...
Страница 395: ...Blank Page ...
Страница 401: ...Blank Page ...