Tds Calibration - Amprobe WT-60 User Manual

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8. Press UP/DOWN to change the value in order to match the value to the
standard solution (solution must be referred to normalization temp. 20°C if
P3.2 has re-adjusted as 20°C). You can adjust the conductivity reading for
+20%. However, if the measured value and standard value differs by more
than 20%, it is suggested to clean probe or replace meter.
9. When calibration is stable, "READY" will display on LCD, press SET to confirm
and return to conductivity measurement mode. If "READY" doesn't show,
check if the calibration solution is stable enough and whether the step 8
input value is correct or not.
10. Repeat 1~9 for other ranges if needed.
11. To exit conductivity calibration mode without confirming, press " ESC " in
step 9.

TDS calibration

Option1: Using TDS standards
1. Dip 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 >2 seconds to begin the calibration. The TDS value will blink on
the LCD (Fig.6).
Fig. 6
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