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wernerjamesAug 20, 2025
Why does my Hach Measuring Instruments say 'Next calibration is due'?
- BBrenda BeanAug 20, 2025
If the Hach Measuring Instruments displays 'Next calibration is due!', calibrate the instrument.
Why does my Hach Measuring Instruments say 'Next calibration is due'?
If the Hach Measuring Instruments displays 'Next calibration is due!', calibrate the instrument.
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 instrument update file is missing?
If the Hach Measuring Instruments displays 'Instrument update file is missing', remove the instrument update files from the USB flash drive. Save the instrument update files again to the USB flash drive. Connect the USB flash drive to the instrument. Start the instrument update procedure again.
How to fix Hach Measuring Instruments copy from USB memory failed?
If the Hach Measuring Instruments displays 'Copy from USB Memory failed', remove large files from the USB flash drive to free up space. Restart the instrument update procedure. Remove the update files from the USB drive, save them again, connect the drive, and try the update again.
What to do if Hach Measuring Instruments says the standard is not stable?
If the Hach Measuring Instruments displays 'The standard is not stable', use the correct calibration standards and invert the standard until no bubbles or large particles are visible.
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.
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.
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 |
