Voted Best Answer
Oct 19, 2017 - 05:00 PM
Calibrate before first use and between prolonged periods of inactivity thereafter for highest accuracy.
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Prepare Solution: Create calibration solution by mixing one pH 7.0 buffer packet (2 included) with 8oz tap water. Mix until all the powder has dissolved.
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Prepare Cup: Remove soaking probes from sample cup. Discard the tap water, rinse out the cup, and fill the cup to the WATER LEVEL line with the prepared buffer solution.
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Soak Probes: Immerse the probes back into the sample cup and let them soak for 5–10 minutes.
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Calibrate: * Press the Power Button to turn the unit on.
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Press and hold CAL for 3 seconds; pH 7.0 will flash on the display.
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Press CAL again to begin calibration.
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Completion: Once calibration is complete, the unit will beep and a Checkmark Icon will display. The pH has now been calibrated to spec.
I have found the readings to be pretty accurate when I compare it to my other test strips or pool store readings.
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