Solving the problem of portable water dissolved oxygen analyzers exceeding their range requires some measures to adjust and fix. Here are the possible solutions:
1. Recalibrate the instrument:
Recalibrate the instrument to ensure the accuracy of the measurement range. Follow the calibration procedures and guidelines provided by the manufacturer. It may be necessary to calibrate the instrument using a standard sample or calibration liquid.
2. Check the sensors and electronic components
Check that the instrument's sensors and electronics are working properly to make sure they are not damaged or malfunctioning. Clean the surface of the sensor and make sure that the sensor is well connected to the instrument.
3. Inspect and treat water samples
Ensure that the method of collecting and processing water samples is correct. Sometimes other chemicals or contaminants in the water sample can affect the measurement results. Before collecting water samples, interference from external contaminants should be avoided as much as possible.
4. Adjustment of environmental conditions
Check and record the environmental conditions at the time of measurement, such as temperature, pressure, and salinity. Sometimes changes in environmental factors can lead to larger-than-expected measurement results. Adjustments or adjustments are made accordingly according to environmental conditions.
5. Professional technical support:
If the above measures do not solve the problem, you may need to contact the relevant technical support team for professional help and guidance. They may be able to provide more in-depth troubleshooting steps or repair services.
Out-of-range issues can have a variety of causes and need to be diagnosed and fixed on a case-by-case basis. Before dealing with the problem, it is best to read the instrument's user manual or operating guide to ensure that the correct procedure is followed. If you're unsure of how to deal with an out-of-range issue, it's best to seek professional help to avoid further damage to the instrument or inaccurate measurements.