KROHNE VARIFLUX 6000 EN - Manual (Page 9)

Installation instructions VARIFLUX 6000 9
VARIFLUX 6000 separate flow sensor with terminal box
• A functional ground FE must always be connected.
• Signal converters with a field power supply of > 125 mA / > 60 V:
Because of the higher field current from the signal converter, a PE protective conductor
must be connected to the VARIFLUX 6000 flow sensor, see grounding diagrams.
Grounding diagram
Flowmeter with adapters
A
Adapter complete, ready assembled
AF Adapter flange
C Adapter connection
D1 L-shaped gasket
D2 Gaskets not included in supply, to be provided by customer
FE Functional ground, wire ≥ 4 mm 2
Cu, (10 AWG).
HF Housing flange for adapter
P Pipeline
PC Pipe connection not included in supply, to be provided by customer
PE Protective conductor required if the VARIFLUX 6000 is operated with a signal converter
that supplies a field current of > 125 mA / > 60 V. Wire
≥ 4mm 2 Cu (10 AWG), not included
with flowmeter, to be provided by customer
Y Signal converter or connection box
8 Replacement of the separate flow sensors
Switch off power source before commencing work !
1) Note down terminal assignment before dismantling the “old” flow sensor.
2) Install the new flow sensor as described in the supplied installation instructions.
3) Make electrical connection at the signal converter as described in the installation and
operating instructions for the signal converter.
4) Specific calibration data are defined during factory calibration for each flow sensor, which are
indicated on the instrument nameplate.
This includes the primary constant GK and the magnetic field frequency.
These data need to be reset in the signal converter.
5) If the size of flow sensor is also different from the old one, the full-scale range Q
100%
and the
meter size will need to be reset.
6) After resetting the signal converter, carry out a zero point check.
7) If necessary, reset the internal electronic totalizer of the signal converter.