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IM 1F6A0-01E
9-7
9. EXPLOSION PRTECTED TYPE INSTRUMENT
(Remote Type Flowmeter)
Ambient Temperature Process Temperature
80
°
C
135
°
C
80
°
C
200
°
C
80
°
C
300
°
C
80
°
C
450
°
C
T4
Temperature Class
T3
T2*
T1*
T090302.eps
*: Use /HT version above 260
°
C
Electrical Connection : ANSI 1/2 NPT female, ISO M20
X
1.5
female.
9.3.2
Installation
WARNING
• All wiring shall comply with local installation
requirements and local electrical code.
• In hazardous locations, the cable entry devices
shall be certified flame proof type, suitable for
the conditions of use and correctly installed.
• Unused apertures shall be closed with suitable
flameproof certified blanking elements.
9.3.3
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.
9.3.4
Maintenance and Repair
WARNING
• The instrument modification or parts replace-
ments by other than authorized representative
of Yokogawa Electric Corporation are prohibited
and will void the certification.
9.3.5
Installation Diagram
Intrinsically Safe
F090305_1.EPS
[Remote type]
DYA (converter)
SUPPLY
PULSE
A
B
T (*1)
C
A
B
T
DY (flowmeter)
SUPPLY
PULSE
Safety barriers
Safety barriers
[Integral type]
DY-N (flowmeter)
Hazardous Location
(Zone 0)
Non Hazardous
Location
Non Hazardous
Location
DYC: Signal cable
(*1) Wire for T terminal
With temperature sensor type : installed
Without temperature sensor type: not installed
Electrical parameters:
Ui=30V Ii=165mA Pi=0.9W
Ci=6nF Li=0.15mH
Installation Requirements between Flowmeter, Converter and
Safety Barrieres:
Uo
Ui Io
Ii Po
Pi Co
Ci
Ccable
Lo
Li
Lcable
Uo, Io, Co, and Lo are parameters of safety barrier.
Ccable and Lcable are the maximum allowable cable
parameters.
Hazardous Location
(Zone 0)
WARNING
1. The safety barrier must be SAA certified.
2. Input voltage of the safety barrier must be less
than 250Vrms/Vdc.
3. In any safety barriers used the output current
must be limited by a resistor ‘R’ such that
Io=Uo/R.
Содержание AE100D
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