Scanner 2000 Steam Mass Flow Transmitter ... - Spirax Sarco

Scanner ® 2000 microEFM Section 5
Important If possible, download the configuration settings and all archive logs before replacing the
circuit board. Press the ENTER/SAVE key on the keypad before disconnecting the battery
to save accumulated flow run and turbine volume totals (grand total and current day
total), and energy and mass totals to memory.
To replace the circuit assembly, perform the following steps:
1. Unscrew the cover of the enclosure counter-clockwise until it separates from the main body of the enclosure.
2. Using a small standard blade screwdriver, remove the two #4-40 × 7/8” screws located to the right and
left side of the display (Figure 5.1, page 76).
3. Lift the display/keypad assembly from the enclosure.
4. Record the locations of all cable connections to the circuit board.
5. Using a small standard blade screwdriver, remove all wiring from terminal blocks TB1, TB2, and TB3,
and J2, ensuring that all wiring that is connected to powered circuits is insulated with tape.
6. Unplug the battery cable from connector J1 on the circuit board.
7. Disconnect the sensor ribbon cable from the J5 connector on the circuit board as follows:
a. Lift the latch from the black clip securing the ribbon cable (Figure 5.2).
b. When the latch is fully open, the ribbon cable will release freely.
Figure 5.2—Latch securing the ribbon cable
8. Remove the original circuit board/keypad assembly from the enclosure.
9. Remove the two #4-40 × 5/16” screws fastening the circuit board to the keypad (Figure 5.3, page 78).
10. Remove the keypad ribbon cable from the J7 connector on the LCD side of the circuit board by pressing
in on the sides of the black plastic clip and pulling gently on the clip. Do not pull on the ribbon cable; the
cable will release freely when the clip opens (Figure 5.4, page 78).
11. Remove the circuit board from the enclosure and remove the replacement circuit board from its packaging.
12. Connect the keypad ribbon cable to the J7 connector on the LCD side of the new circuit board by sliding
the end of the ribbon into the black clip as far as it will go and pressing the black plastic clip into the connector
until it snaps.
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