KROHNE IFC 210 E-EEx EN - Manual (Page 63)

Part C Special applications, functional checks, service, and order numbers Sect. 6.5
05/2002 IFC 210 E 63
6.5 Rapid changes in flowrate
Important, please note!
•
Observe the directions and regulations and the electrical data specified in the
EC type test certificate.
•
In addition to the regulations for heavy-current installations (VDE 0100),
pay particular attention to the requirements specified in EN 60079-14 “Electrical
equipment in hazardous areas”.
•
Assembly, installation, commissioning and maintenance work may only be carried
out by ”personnel trained in explosion protection” !
Application
in conjunction with batching processes, fast-response control loops, etc.
Operator control of the signal converter for the new settings refer to chapters 4 and 5
To change settings
•
Fct. 1.02 Timeconstant (change time constant)
Setting to “Only Current I” and set time to 0.2 s.
•
Dynamic response with meter sizes DN 2.5-300 /
1
/
10
”-12”
Dead time: approx. 0.06 s at 50 Hz line frequency
approx. 0.05 s at 60 Hz line frequency
Time constant: set as above, current output (mA) additionally plus 0.1 s
•
Reducing the dead time by a factor of 3 (possible by changing the magnetic field frequency)
Fct. 3.02 Flow Meter, subfunction “Field Frequency”, change to „
1 /
2
“ only practical with
IFS 5000 F (DN 2.5-100 /
1
/
10
”-4”) and IFS 4000 F (DN 10, 15, 50-100 /
1
/
10
”,
1
/
2
”, 2”-4”.
Please consult factory where other types and meter sizes are concerned.