ATI Model F12/D Gas Transmitter Part 5 – Maintenance
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O&M Manual (Rev-H)
3. Remove the Internal Shield by removing the three screws (4)
4. Remove the Terminal PCB by pulling straight up, to expose the CPU PCB (5).
5. Remove the Battery (6), and replace with same kind.
6. Reverse steps 4 through 1 to re-assemble the unit.
7. After powering up the unit, set the data and time.
a. Note: You will be forced to disable Auto-test on startup until the clock has been set.