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Cathy JacksonSep 12, 2025
What does 'No valid data found' mean on Hach Measuring Instruments?
- LLuke TaylorSep 12, 2025
If the Hach Measuring Instruments displays 'No valid data found', it means no sample ID file was found on the USB flash drive.
What does 'No valid data found' mean on Hach Measuring Instruments?
If the Hach Measuring Instruments displays 'No valid data found', it means no sample ID file was found on the USB flash drive.
What does 'Next verification is due' mean on Hach Measuring Instruments?
If the Hach Measuring Instruments displays 'Next verification is due!', perform a calibration verification.
What does 'The calibration range is exceeded' mean on Hach Measuring Instruments?
If the Hach Measuring Instruments displays 'The calibration range is exceeded', it means the measured turbidity is higher than the instrument's calibration range. You should select a calibration curve that matches the full measurement range.
What to do if Hach Measuring Instruments shows a hardware error?
If the Hach Measuring Instruments displays a hardware or instrument error, power it off, wait 20 seconds, and then power it back on.
How to fix 'Cannot write to USB memory' on Hach Measuring Instruments?
If the Hach Measuring Instruments displays 'Cannot write to USB memory', connect a USB flash drive to the instrument, ensuring the file system "FAT32" is installed. Power the instrument off, wait 20 seconds, then power it back on. Check the USB flash drive for available space, and repeat the power cycle before reconnecting the USB flash drive to the instrument.
What to do if Hach Measuring Instruments says USB memory is not connected?
To resolve the 'USB memory is not connected' error on the Hach Measuring Instruments, connect a USB flash drive to the instrument, ensuring it uses the FAT32 file system. Power the instrument off, wait 20 seconds, then power it back on. Reconnect the USB flash drive and restart the instrument update procedure.
How to fix Hach Measuring Instruments not able to read sampling date?
If the Hach Measuring Instruments displays 'Not able to read sampling date', make sure that the date and time format is dd.mm.yyyy hh:mm.
What to do if Hach Measuring Instruments says sample ID list full?
If the Hach Measuring Instruments displays 'The sample ID list full. Data has not been added', remove unused sample IDs and add a new one.
What to do if Hach Measuring Instruments says the standard value is out of the measurement range?
If the Hach Measuring Instruments displays 'The standard value is out of the measurement range', use the correct calibration standards, invert the standards, and measure them in ascending order.
Why does Hach Measuring Instruments say the standard value is too high?
If the Hach Measuring Instruments displays 'The standard value is too high', the wrong calibration standard is in the vial compartment or the standard has expired. Ensure the correct, unexpired calibration standard is in the vial compartment.
General| Model | TL2350 |
|---|---|
| Measurement Range | 0 to 1000 NTU |
| Light Source | LED |
| Operating Temperature | 0 to 50 °C (32 to 122 °F) |
| Warranty | 1 year |
| Category | Turbidimeter |
| Resolution | 0.01 NTU |
| Accuracy | ±2% of reading |
| Measurement Method | Nephelometric |
| Power Supply | 4 AA batteries |
| Display | LCD |
| Response Time | Less than 6 seconds |
Provides accuracy and repeatability specifications for various measurement modes.
Explains the meaning of DANGER, WARNING, CAUTION, and NOTICE hazard symbols.
Instructs users to read labels and explains symbol meanings on the instrument.
Lists and identifies the physical components of the turbidimeter.
Provides recommendations for optimal instrument installation location and environment.
Explains the initial steps to power on and start the instrument.
Guides users through configuring settings like location, date/time, and security.
Explains how to set reading modes, units, and other measurement parameters.
Instructions for adding, editing, and deleting operator IDs, passwords, and security levels.
Steps for adding sample IDs manually or importing them from a file.
Procedure for calibrating the turbidimeter using StablCal standards.
Details on how to configure calibration settings before performing calibration.
Step-by-step guide for performing a StablCal calibration.
Procedure for verifying instrument calibration using standards.
Key considerations for accurate and repeatable turbidity measurements.
Step-by-step process for performing a turbidity measurement.
Safety precautions and notes for replacing the instrument's lamp.
Common startup problems and their solutions.
