Quick Installation Guide
00825-0100-4716, Rev DA
October 2009
Rosemount 3095 MultiVariable
22
China (NEPSI) Certifications
2 China Intrinsic Safety
Ex ia IIC T4
Special conditions for safe use (x):
1. 3095 Series transmitter with temperature sensor have not been certified.
2. The temperature of process medium should be less than 121 °C.
3. The ambient temperature range is (-40~+60) °C.
4. Safety parameters
4.1 Input parameters
4.1.1 Transmitter with output code “V”
U
i
= 30V
__
I
i
= 300 mA
__
P
i
= 1.3W
__
__
4.1.2 Other transmitters
U
i
=40V
_
I
i
=165 mA
__
P
i
=1.0W
_
C
i
=0.012 F
_
L
i
=20 H
4.2 RTD terminals
U
o
=30V
_
I
o
=12 mA
_
P
o
=100 mW
_
C
o
=66nF
_
L
o
=100 mH
5. The cable entry of transmitter should be protected to ensure the degree of protection
of the enclosure IP 20 (GB4208-1993) at least.
6. The terminals for connection to power supply of transmitter should be connected to
associated apparatus certified by NEPSI in accordance with GB3836.1-2000 and
GB3836.4-2000 to establish intrinsic safety system, it has to fulfill the following
requirements:
U
o
U
i __
I
o
I
i __
P
o
P
i __
C
o
C
c
+C
i __
L
o
L
c
+L
i
Note: C
c,
L
c
the distributed capacitance and inductance of the cables
U
o,
I
o,
P
o
maximum output parameters of associated apparatus
C
o,
L
o,
maximum external parameters of associated apparatus
7. The terminals for connection to sensor of transmitter should be connected to intrinsic
safety sensor certified by NEPSI in accordance with GB3836.1-2000 and
GB3836.4-2000 to establish intrinsic safety system, it has to fulfill the following
requirements:
U
i
U
o __
I
i
I
o __
P
i
P
o __
C
i
C
o
-C
c __
L
i
L
c
+L
o
Note: C
c,
L
c
the distributed capacitance and inductance of the cables
U
i,
I
i,
P
i
maximum input parameters of intrinsic safety sensor
C
i,
L
i,
maximum internal parameters of intrinsic safety sensor
8. The cables between the transmitter, associated apparatus and sensor are 2-core
shielded cables (the cables must have insulated shield). The cable core section area
should be more than 0.5 mm
2
. The shielded has to be grounded in non-hazardous
area and isolated from the housing. The wiring has to not be affected by
electromagnetic disturbance.
9. Associated apparatus should installed in a safe location, and during installation,
operation and maintenance, the regulations of the instruction manual have to be
strictly observed.
10.End users is not permitted to change any components insides.
(28 strony)
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