Apera Instruments PH910

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TDS measurement interface
Salinity measurement interface
pH/Cond. measurement interface
mV measurement interface
4.2 Keypad functions
Diagram-1
Keypad operation mode:
Short press—Press the <2s, buzzer makes a beep;
Long press—Press key >2s, buzzer makes a beep when pressing the button,
another beep will ring after holding the key for 2 seconds.
①—TDS measurement ②—TDS factor 0.71
Salinity factor 0.5