LED display “LCK” on the left window, and then release the SET key. The display on the
right window will show “0”. Use “+” key to adjust the number to 666 and press SET key
again to confirm. The left display will show as “lnt” and right display will show as “off”.
Press “+” key once to change “off” to “on”. Then press SET key to confirm factory reset.
Two displays will show “----” then “8.8.8.8.”. When you see this display back to normal
operating mode, factory reset completed. Please check Figure 12 for reset flow chart.
Figure 12. Factory reset flow chart. “on” is to confirm reset, “off” is to cancel reset
Please note: In older versions, it may show Int options as “y” or “n”, instead of
“on”, “off”. To reset, please select “y”.
13. Digital filter function
This filter is for rejecting the power line interference. There are two settings, “A” for 50
Hertz interferences, and “b” for 60 Hertz interferences. The default setting is “b” for North
America use. If you encounter fast fluctuating temperature reading, and if you are using
this controller in a country/region that has 50 Hertz power line, please set it to “A”.
To change this filter for 50 Hz powerline, under the normal operating mode, press and
hold SET key for 2 seconds until LED display “LCK” on the left window, and then release
the SET key. The display on the right window will show “0”. Use “+” key to adjust the
number to 50 and press SET key again to confirm. The left display will show as “FIL” and
right display will show as “b”. Press “+” or “-” key once to change “b” to “A”. Then press
SET key to confirm and exit.
Figure 13. Digital filter flow chart. “b” is for 60 Hz powerline (N. America), “A” is for 50 Hz
powerline (International).
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