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Mecon 02/2010
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Transmitter mag-flux M1
Maintenance and repair
The transmitter
mag-flux M1
is designed for maintenance-free
performance. It contains no parts, which have to be replaced or
adjusted cyclically.
While commissioning or maintenance, mains power must be
switched off. Do not connect or disconnect the wiring between
sensor and transmitter while power is on!
Mains fuse
The mains fuse is located in the terminal compartment. Before
replacing the fuse, the power has to be switched off. Check
carefully that the transmitter is voltage free. The fuse may only
be replaced by the exactly same type of fuse! (See also chapter
„Technical data
mag-flux M1
“on page 9).
Replacement of terminal board
The terminal board is located in the terminal compartment.
Before replacing the board, the power has to be switched off.
Check carefully that the transmitter is voltage free. The board
may only be replaced by the exactly same type of board.
To replace the terminal board, all pluggable connectors have to
be released first and the 4 fixing screws have to be loosened.
For the assembly of the new board ensure, that the screws are
secured again by toothed washers. Only after all connectors are
plugged in, the power can be switched on again
Replacement of transmitter electronic
The transmitter electronic may be replaced only as complete
module. With the exchange of individual components the trans-
mitter is afterwards no longer calibrated neither regarding its
measuring characteristics nor its analog outputs. The exchange
has to be done as described in the following:
1.
Switch off the power supply.
2.
Open the terminal compartment and unplug the 6-pole con-
nector.
3.
Open the front cover and remove the decoration foil by
loosing the three mounting screws and if necessary the
display board inside the electronic compartment by loosing
the three thread bolts.
4.
Unplug the green connector on the power supply board
5.
Screw out the 3 thread bolts and after that extract the
power supply board carefully.
6.
Disconnect the sensor’s wires on the main board. Please
memorize the correct order of the wires.
7.
Screw out the 3 thread bolts and extract the main board
carefully – please take special care of the flatcable leading
to the terminal compartment.
9.
The data memory chip (DSM) has to be changed over to the
new electronic stack (see also chapter „data memory chip
(DSM)” on page 5).
10. Insert the new main board and feed the flatcable through
the hole in the compartment partitions wall.
11. Assemble the transmitter reverse to items 1 to 7 of this list.
12. Before powering on, check all connectors to be plugged in
correctly and all wires and devices are fixed.
After the exchange the transmitter is calibrated by the take-over
of the data memory chip (DSM) for the sensor. All totalized
counts and settings are taken on.
__
mag-flux M1 control unit (Option)
Introduction
The transmitter
mag-flux M1
can be operated depending on con-
figuration by using a control unit or via a HART
®
interface.
Below the operation and parameterization of the transmitter is
described using the control unit. It is located in the electronic
compartment and covered by an inspection window.
Fig 22
Transmitter
mag-flux M1
with control unit (optional)
Display
The control unit in the
mag-flux M1
has an integrated back
lighted, alphanumeric display with two 16-character lines (format
16 x 60 mm). Measurement data and settings can be read direct-
ly from this display.
The LCD display is designed to be operated at temperatures
ranging from − 20 °C to + 60 °C (-4° F to 140 °F) without being
damaged. However, near-freezing temperatures the display be-
comes slow and the readability of the measured values is re-
duced. At temperatures below − 10 C° (14 °F), only static values
(parameter settings) can be displayed. At temperatures
exceeding 60 C° (140 °F), contrast decreases substantially on
the LCD and the liquid crystals can dry out.
