What does 'Underrange!' mean on Hach 2100Q Measuring Instruments?
If the Hach Measuring Instruments displays 'Underrange!', it means the measured absorbance is below the calibration range. Repeat the calibration.
What to do if Hach Measuring Instruments says 'Password incorrect'?
If the Hach Measuring Instruments displays 'Password incorrect. Please retry', it means the wrong password was entered. Enter the correct password.
Why does Hach 2100Q show 'RST: Average value'?
If the Hach Measuring Instruments displays 'RST: Average value!', it means solids are settling too slowly, and the reading mode isn't suitable for the sample. Select 'Normal' or 'Signal Average' reading mode.
What to do if Hach 2100Q Measuring Instruments says 'Delete Last Reading Failed'?
If the Hach Measuring Instruments displays 'Delete Last Reading Failed!', it indicates an error in the data storage. Turn the meter off and on. If the error persists, contact technical support.
What does 'Confidence level is < 95%' mean on Hach 2100Q?
If the Hach Measuring Instruments displays 'Confidence level is < 95%', it indicates that the Rapidly Settling Turbidity reading mode didn't meet the range of ? 95% confidence. Invert the sample several times to allocate the solids and repeat the reading. If the sample is stable, switch to the Normal reading mode.
General| Range | 0 - 1000 NTU |
|---|---|
| Resolution | 0.01 NTU on lowest range |
| Detector | Silicon photodiode |
| Stray Light | < 0.02 NTU |
| Measurement Method | Nephelometry |
| Power Supply | 4 AA alkaline batteries |
| Operating Temperature | 0 to 50 °C |
| Storage Temperature | -20-60°C |
| Measurement Modes | Signal Averaging, Rapidly Settling Turbidity |
| Display | LCD |
| Accuracy | ±2% of reading plus stray light from 0 to 1000 NTU |
| Light Source | Tungsten filament lamp |
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