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12 Trouble Shooting
Error
Solutions
The instrument does
not turn on
1. The battery is not installed correctly. Check the direction.
2. Battery low voltage, replace the battery.
3. Instrument freezes. Take out the batteries and re-install.
The instrument can
not calibrate
1. Check calibration procedure: correct atmospheric pressure,
salinity input and temperature.
2. The measured value is not stable, prolong the stabilization
time, until is fully stabilized, then press to finish.
3. Check the sensor cap. If it is contaminated, it can be cleaned; if
dried out, it can be hydrated; if damaged, it can be replaced.
DO readings are not
accurate
1.Check whether the temperature is stable, the salinity input and
barometric pressure are accurate.
2. If the probe calibration is not good, recalibrate.
3. Check the sensor cap. If it is contaminated, it can be cleaned;
if dried out, it can be hydrated; if damaged it can be replaced.
4. Unscrew the sensor cap, check whether there is moisture
inside, if so, wipe off, dry, and tighten it.
The display value
stays 200% or 20.0
mg/L. No change
1. Check whether the concentration of the sample is higher than
200% or 20.0 mg / L (ppm).
2. Check if the temperature reading is accurate.
3. If the probe calibration is not good, recalibrate.
4. Check the sensor cap. If it is contaminated, it can be cleaned; if
dried out, it can be hydrated; if damaged, it can be replaced.
