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E. Are you more than the minimum sample distance from previous sample?
Figure 40
Solution: In Automatic sampling mode, there is a minimum distance setting (Under Controller Settings).
If system hasn't moved this distance it will not permit Automatic sampling. Move unit ahead at least the
minimum sample distance or sample in Single pH Sample mode.
F. Does pH electrohydraulic motor have adequate voltage?
Remove cover to expose hydraulic pump. Check the voltage on the motor while running the pH sampler
in manual mode.
Figure 41 and 42
Monitor voltage to see if it drops below 9 volts, the minimum the internal circuit needs to run in
automatic mode is 8.4 volts. If the 12V system drops below 9v, there is little margin and you can
potentially see intermittent cycling issues.
Solutions:
-Clean battery contacts
-Check charging system (min 75 amp alternator necessary)
-Remove unnecessary cable extensions on the power cord
-Put a separate 12v deep cycle battery in parallel with the main battery source
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