Yokogawa AXFA14G/C - Manual (Page 22)

IM 1E6K2-E
4-19-14
4. OPERATION
Install the amplifier into the converter.
AXF integral flowmeter
Install the amplifier by the following procedures.
(1) To replace the amplifier assembly, follow
the procedures used to remove it in the
reverse order.
(2) Connect wiring connector31. (Figure 4.9.4)
(3) Replace the assembly by pushing it in,
taking care not to damage the amplifier
mounting connectors on the circuit board
(refer to IM01E20D01-01E Figure 5.4.6).
(4) Tighten the three mounting screws while
holding the assembly with your hand.
(5) Attach a lead wire fastener to the rods, the
position of the fastener be within 0 to
10mm from the rim of aluminum converter
case. (Figure 4.9.8)
AXFA14
(1) To replace the amplifier assembly, follow
the procedures used to remove it in the
reverse order.
(2) Connect wiring connector31. (Figure 4.9.6)
(3) Replace the assembly by pushing it in,
taking care not to damage the amplifier
mounting connectors on the circuit board
(refer to IM01E20C02-01E Figure 11.1.6)
(4) Tighten the three mounting screws while
holding the assembly with your hand.
(5) Attach two lead wire fasteners to the
rods.( Figure 4.9.5)
(6) Push a bottom side lead wire fastener
deeper along the rods using e.g. driver tip.
The position of the upper fastener be
within 0 to 10mm from the rim of
aluminum converter case.(refer to Figure
4.9.8)
(7) Carefully connect wiring connectors 1 and
2 to the amplifier assembly, making sure
that the connectors’ directions are correct.
Let wiring connector 2 pass along the
amplifier side of the rod.(refer to
IM01E20C02-01E Figure 10.1.6)
(8) Replace the cover, taking care not to
entangle the cables of the wiring
connectors.
In installing the cover refer to integral
flowmeter explanation in item (7).
(6) Carefully connect wiring connectors 1 and
2 to the amplifier assembly, making sure
that the connectors’ directions are correct.
Let wiring connector 2 pass along the
amplifier side of the rod (refer to
IM01E20D01-01E Figure 5.4.6).
(7) Install the cover, taking care not to
entangle the cables of the wiring
connectors.
In installing the cover to the flowmeter,
turn it in the direction of the arrow as
shown below. Tighten cover locking screw
1 counterclockwise using a hexagonal
wrench (nominal size 3) to lock the cover.
Figure 4.9.8 The Position of the Fastener
Figure 4.9.9 Installing the Display Cover
10mm
or less
Fastener
Converter
case
2 ᭺
1 ᭺
Cover locking
screws
End
Note 1 : If no exciting current flows, the two excitation lamps do not flash correctly.
Note 2 : When the zero readjustment is available (i.e. the flowtube has been filled with fluid and the fluid
velocity is completely zero) after checking of AXFA14 or AXF integral flowmeter, it is convenient to
carry out zero adjustment instead of subtraction the zero point value.
In case that zero readjustment is not available, do not carry out zero adjustment of AXFA14 or AXF
integral flowmeter.
Note 3 : A common mode noise signal equivalent to a set value with the span-setting dial is output from the
AM012.
Note 4 : In case of parameter change via the Host, set the MODE_BLK of each parameter to O/S mode before
the change. (Refer to IM 01E20F02-01E page A-2.)