88
RFT9739 Rack-Mount Transmitter Instruction Manual
RFT9739 Specifications
continued
Environmental effects
EMI effect
Rack-mount RFT9739 transmitters feature enhanced EMI immunity and
the requirements of the EMC directive 89/336/EEC per EN 50081-1
(January 1992) and EN 50082-2 (March 1995) when operated at
nominal rated flow measurement range. Enhanced EMI immunity is
required for transmitters installed in the European Community after
1 January 1996.
For specific EMC effects within the EC, the Technical EMC file may be
reviewed at Fisher-Rosemount Veenendaal.
All RFT9739 transmitters meet the requirements of SAMA PMC 33.1
(October 1978), Class 1, A, B, C (0.6% span) at nominal flow rate. All
RFT9739 transmitters meet the recommendations of ANSI/IEEE C62.41
(1991) for surge and EFT.
To meet the above specifications, the transmitter must be installed with
an approved Micro Motion sensor, and the sensor cable must be either
doubly shielded with full contact glands, or installed in continuous, fully
bonded metallic conduit. The transmitter and sensor must be directly
connected to a low-impedance (less than 1 ohm) earth ground.
Transmitter outputs must be run in standard twisted-pair, shielded
instrument wire.
Ambient temperature effect on transmitter
On mA outputs:
±0.005% of span/°C
On temperature output:
±0.01°C/°C
On mA input:
±0.01% of span/°C
Hazardous area classifications
When properly installed with an approved sensor, the RFT9739 rack-
mount transmitter can be installed in the following areas:
UL
Non-hazardous locations. Provides nonincendive sensor outputs for use
in Class I, Div. 2, Groups A, B, C, and D; or intrinsically safe sensor
outputs for use in Class I, Div. 1, Groups C and D, or Class II, Groups E,
F, and G.
CSA
Non-hazardous locations. Connections to sensor are intrinsically safe for
use in Class I, Div. 1, Groups C, D, and Class II, Groups E, F, and G.
CENELEC
Safe area only. Connections to sensor are intrinsically safe in
[EEx ib] IIC areas.
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