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TDS Calibration
Option1: Using TDS standards
1. Insert the probe into demineralized or distilled
water for about 30 minutes to rinse the probe
2. Select the TDS standard for calibration. The
factory default setting of the TDS conversion
factor is 0.50. You can improve the calibration
accuracy by setting the TDS factor before starting
the calibration. Please refer Appendix A for more
information of TDS conversion factor.
3. Pour enough solution into two separate & clean
containers.
4. Turn on the meter. Press "MODE" to select TDS
mode.
5. Rinse the probe into one of the containers. Gently
stir the probe.
6. Dip the rinsed probe into the second container.
Tap the probe on the bottom of container to
remove air bubbles. Let the probe stabilize to the
solution temperature.
7. Press "CAL" more than 2 seconds to begin the
calibration. The TDS value will blink on the LCD.
8. Press the "q" to adjust the value to match the
value
9. When "CAL" stop flashing, press "SET" to confirm
and return to TDS normal mode.
10. Repeat 1~9 for other ranges if needed.
Option2: Using Conversion Factors
TDS values are related to conductivity. You can calibrate
the meter by using conductivity standards as described
above and then program the meter with a given
conversion factor. Please refer to setting P2.1
to the standard solution.
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