Operation
CALIBRATION (CONTINUED)
Slope Calibration (Continued)
8. Remove the electrode from the solution and rinse with purified water.
9. The display will automatically show the slope percentage of the electrode.
10. IMPORTANT: If the slope percentage is greater than 105% or less than 95%
the calibration is inaccurate and you will need to recalibrate the device.
11. Repeat with the unused (pH 10.01 or pH 4.01) buffer solution if necessary.
pH SAMPLE TESTING
1. Remove the cap (if applicable) and rinse the electrode with purified
water.
2. Place the electrode in the sample solution.
3. Wait until the display is steady before recording your measurement.
4. IMPORTANT: pH is affected by temperature. The results will be more
accurate if the sample solution is at the same temperature as the
calibration solution.
5. IMPORTANT: If the calibration or the display is abnormal hold the RES
button until it makes a “ding” sound, then release it. Then recalibrate the
device.
mV TEST
1. Press the pH | mV button.
2. Connect the ORP or ion electrode (not included).
3. Wait until the display is steady before recording your measurement.
USE °F or °C
1. Press and hold the pH | mV button to switch between °F and °C.
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