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Reference Manual
00809-0100-4021, Rev FB
August 2011
Rosemount 3144P
B-6
6. The terminals for connection to sensor of temperature transmitter must
be connected to an intrinsic safety sensor certified by NEPSI in
accordance with GB 3836.1-2000 and GB 3836.4-2000 to establish an
intrinsically safe system. The following requirements must be fulfilled:
Where:
C
c
, L
c
the distributed capacitance and inductance of the cables
U
i
, I
i
, P
i
maximum input parameters of intrinsically safe sensor
C
i
, L
i
maximum internal parameters of intrinsically safe sensor
7. The cables between temperature 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 cable has to be grounded in a non-hazardous area and isolated
from the housing. The wiring has to not be affected by electromagnetic
disturbance.
8. Associated apparatus should be installed in a safe location. During
installation, operation, and maintenance, the regulations of the
instruction manual have to be strictly observed.
9. End users are not permitted to change the internal components or
hardware of the device.
10. During installation, operation, and maintenance of the temperature
transmitter, observe the following standards:
a. GB3836.13-1997 “Electrical apparatus for explosive gas atmospheres
Part 13: Repair and overhaul for apparatus used in explosive gas
atmospheres.”
b. GB3836.15-2000 “Electrical apparatus for explosive gas atmospheres
Part 15: Electrical installations in hazardous area (other than mines).”
c. GB50257-1996 “Code for construction and acceptance of electric
device for explosion atmospheres and fire hazard electrical equipment
installation engineering.”
E3 China
Flameproof
Ex ia IIC T6
Certificate Number: GYJ06583/GYJ06584
U
i
≥
U
o
C
i
≤
C
o
- C
c
I
i
≥
I
o
L
i
≥
L
c
- L
o
P
o
≥
P
i
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