KROHNE CORIMASS E P MFM 2081 EEx EN - Manual (Page 3)

Additional Instruction for Ex version MFM 2081 / 3081 3
1 Description
The mass flowmeter MFM 2081/3081 K EEx and MFM 2081/3081 F EEx consists of two
main components:
The Signal Converter, which calculates and displays the measured values and the
transducer which supplies the converter with the analog signals.
A Cable Seal, which is screwed into the converter housing, leads the electric signals from
the transducer to the converter. The signal cable between the transducer and converter is
intrinsically safe.
In the separate version MFM 20381/3081 F EEx the transducer MFS 2000/3000 EEx and
the converter MFC 081 F EEx are connected to each other via a shielded multi-conductor
cable. The maximum cable length is 50 m.
The converter housing of the compact version MFM 2081/3081 K EEx is permanently
screwed onto the transducer and must not be removed at any time.
Cenelec Approvals
PTB approves the conformity of the mass flow meter according to the harmonized European
Standards:
EN50018 "d" - Pressure tight housing
for the electronics housing and the terminal compartment
EN50019
"e" - Increased safety
for the standard termination compartment
EN50020
"i" - Intrinsically Safe
"b" for the Zener barriers and all electrical circuits inside the transducer
"a" for the converter outputs
The following approvals are valid:
Compact P and E meters, including intrinsically safe
EEx de [ib] IIC T6...T3
EEx d [ib] IIC T6-T3
EEx de [ia/ib] IIC T6-T3
EEx d [ia/ib] IIC T6-T3
MFM 2081 K
MFM 3081 K
MFM 2081 Ki
MFM 3081 Ki
PTB Ex 96.D.2037 X
Converter, remote mounted version, including intrinsically safe
EEx de [ib] IIC T6-T3
EEx d [ib] IIC T6-T3
EEx de [ia/ib] IIC T6-T3
EEx d [ia/ib] IIC T6-T3
MFC 081 F
MFC 081 Fi PTB Ex 98.D.2037 X
P meter, remote mounted version
EEx ib IIC T6-T3
MFS 2000 F PTB Ex 98.D.2038 X
E meter, remote mounted version
EEx ib IIC T6-T3
MFS 3000 F PTB Ex 98.D.2039 X