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FUNCTIONAL DESCRIPTION
1) 8-pin DIN connector for probe
2) Liquid Crystal Display
3) pH range selection key
4) µS/cm (EC) range selection key
5) EC/TDS calibration knob
6) pH offset calibration knob
7) ppm (TDS) selection key
8) °C (Temperature) selection key, for HI 9812-5 only
9) ON/OFF key
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