VorTek Pro-T, Инструкция по эксплуатации

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Chapter 5 Troubleshooting & Repair Series M22/M23/M24 Instruction Manual
5-14 M-000-00010
Electronics Assembly Replacement (All Meters)
The electronics boards are electrostatically sensitive. Wear a
grounding wrist strap and make sure to observe proper handling
precautions required for static-sensitive components.
1.
Turn off power to the unit.
2.
Locate and loosen the small set screw which locks the larger
enclosure cover in place. Unscrew the cover to expose the
electronics stack.
3.
Locate the sensor harnesses which come up from the neck of
the flow meter and attaches to the circuit boards. Make note of
the location of each sensor connection. Refer to figures 5-1
and 5-2. The vortex sensor connection is on the left, the
temperature sensor connection (if present) is second form the
left, and the pressure sensor connection (if present) is the right
most connector. Use small pliers to pull the sensor wiring
connectors off of the circuit boards.
4. Locate and loosen the small set screw which locks the smaller
enclosure cover in place. Unscrew the cover to expose the field
wiring strip. Tag and remove the field wires.
5. Remove the screws that hold the black wiring label in place,
remove the label.
6.
Locate the 4 Phillips head screws which are spaced at 90-
degrees around the terminal board. These screws hold the
electronics stack in the enclosure. Loosen these screws (Note:
that these are captive screws, they will stay inside the
enclosure).
7.
Carefully remove the electronics stack from the opposite side
of the enclosure. If the electronics stack will not come out,
gently tap the terminal strip with the screw driver handle. This
will loosen the rubber sealing gasket on the other side of the
enclosure wall. Be careful that the stack does not hang up on
the loose sensor harnesses.
8.
Repeat steps 1 through 6 in reverse order to install the new
electronics stack.
Warning!
Before attempting any flow
meter repair, verify that the
line is not pressurized.
Always remove main power
before disassembling any
part of the mass flow meter.