CALIBRATE THE pH SENSOR

1

3 Fill one cup of water, one cup of pH buffer #4 (Fig. 3) and one cup of pH buffer #7 (Fig. 4) water #4 #7

4 Remove cap from the sensor and gently wash the pH probe in the water and dry on a clean cloth.

5 Gently swish the probe in the pH buffer #4. Continue to swish the probe and follow instructions in step 6.

#4

6 Enter the pH calibration screen press SETUP (A), SET RESERVOIR (B), PH SENSOR(C), then CALIBRATE (D) and follow the instructions on the screen.

Calibration will take about three minutes to complete.

7 Wash the pH sensor in the cup of water and dry on a clean cloth. Repeat steps 5 and 6 for pH buffer #7 solution

#7

8 Press DONE when calibration is complete

IMPORTANT: Safely store the pH sensor cap and use it to stop the sensor from drying out when the water reservoir is empty. Do not let the pH sensor dry out. Fill cap with pH #4 calibration solution before placing it on probe to store the sensor. Failure to follow this procedure will ruin the sensor and void the warranty.

Continued on next page

CALIBRATE THE TDS (TOTAL DISSOLVED SOLIDS) SENSOR (EC 1000 PPM solution required)

6 To enter the TDS calibration screen press SETUP (A), SET RESERVOIR (B), TDS SENSOR(C), then CALIBRATE (D) and follow the instructions on the screen. Continue to swish the probe in the solution for three minutes.

Calibration will take about three minutes to complete.

Press FINISH (E) when complete.