Lutron Electronics PH-222 - 3 Front Panel Descriptions; Display; Power ( Logger, ▲ ) Button; Hold ( Enter, CAL ) Button

3. FRONT PANEL DESCRIPTION
3-1 Display
3-2 Power ( Logger, ) Button▲
3-3 Hold ( Enter, CAL ) button
3-4 REC ( / button, ) Button℃℉ ▼
3-5 pH electrode +Temp. sensor, PE-12
3-6 Battery compartment/Cover
3-7 Protection cover
3-8 pH 7.00 buffer solution, PH-07A
3-9 pH 4.00 buffer solution, PH-04A
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