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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.
Ci 0
Li 0