A30 Digital TDS EC Meter

The A30 Digital TDS EC Meter is intended for conductivity measurement with a compatible EC sensor. A TDS display is an estimate based on the measured conductivity and the configured conversion relationship; it is not a pH or ORP measurement.

Configure EC and TDS on a consistent basis

• Confirm the supplied A30 EC/TDS version, measuring interval, complete EC unit and compatible sensor/cell constant.
• Check the temperature input, compensation model and reference temperature before comparing readings.
• For TDS, record the selected factor or scale and verify its suitability for the sample. Do not use one fixed EC-to-TDS conversion for every water composition.
• Match power, outputs, receiving-controller scaling and sensor wiring using the actual A30 EC/TDS documentation. Another model’s pH terminal drawing is not a substitute.

Calibrate and verify the measurement

Inspect and clean the EC cell, use an appropriate standard with a certified temperature value, and follow the supplied calibration sequence. Verify the result independently and record cell constant, unit, compensation settings, reference temperature and any TDS conversion factor.

Use the conductivity unit converter for mS/cm and µS/cm arithmetic, the calibration guide for reference handling, and EC versus TDS for interpretation. Low EC or TDS alone does not establish drinking-water safety.