Pulsafeeder MICROtrac - 10 Addendum: Microtrac PC Board Replacement

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REV. P
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10. Addendum: MicroTrac PC Board Replacement
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Disconnect input power cord from AC Mains Receptacle prior to opening
the MicroTrac controller. With the input power disconnected, the MicroTrac
LCD and LEDs will be off.
1. Remove the four screws that retain the front panel and remove it.
2. Unplug Bleed, Supply and Dose Terminal Blocks.
3. Using and insulated screw driver, remove 4 PCB mounting screws located at each corner of
the PCB assembly.
4. Remove the MicroTrac PCBA to be replaced from the enclosure. Note: the flow, water
meter and probe cables are still attached.
5. Install the new MicroTrac PCBA into the top enclosure. Ensure that the LCD, buttons and
LEDs are correctly aligned in the top enclosure.
6. Secure the new board with the 4 mounting screws located at each corner of the MicroTrac
PCB Assembly (PCBA).
7. Transfer the flow, water meter and probe cables from the MicroTrac PCBA being replaced to
the new PCBA. Ensure that connections match the silkscreen on the new MicroTrac PCBA.
8. Plug the Bleed, Supply and Dose Terminal Blocks into the new MicroTrac PCBA. Ensure
that connections match the silkscreen on the new PCBA.
9. With an ohm meter, check that the center conductor of the Supply Terminal Block is
connected to the ground terminal of the disconnected input power cord.
10. Set SW1 on the new MicroTrac PCBA to the same settings as the MicroTrac PCBA being
replaced.
11. Visually inspect all connections.
12. Use an ohm meter on the disconnected plug of the input power cord and check for low
resistances (less than 1 ohm) between Line to Line and line to ground.
13. Disconnect the meter, remove all tools and power the MicroTrac on. The display will the
splash screen and start menu will be shown.
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Trained service personnel are required for all electrical connections. This product does not contain operator serviceable
parts.