Technical Support

At Palintest, we pride ourselves on the level of support that we offer to our customers.

We recognise that on occasion you may need our support to get the best from your Palintest equipment. Our website is full of useful information about testing with Palintest instrument.

For product downloads including instruction manuals and the latest software downloads, please visit our downloads page. For instructions relating to your specific reagent or sensor, these can be downloaded from our reagents and sensors list.

Within Frequently Asked Questions you can find short form answers for our top queries. Alternatively, you can search our library of information, filtering by your product and application to help find the information most useful to you. Content within the hub content includes instrument maintenance guides, support information and general news.

If you cannot find the information you are looking for and/or if you would like to speak to a member of our team, please fill in the contact form at the bottom of the page. Please provide as much information about possible about your query as this helps our team to deal with your request much more quickly.

Filter By:

Frequently Asked Questions

Check standards are used to determine if an instrument is still within calibration.

Kemio check standards verify that the instrument correctly measures electric signals. As with electrochemical sensors in samples, the Kemio instrument applies a voltage to the check standard and measures the resulting current.

Check standards include verified resistors, which produce a consistent electric current. Kemio validates the measured current internally. Sensor instruments display the corresponding concentration value, which is compared manually to target values on the certificate supplied with the set of check standards.

When testing a sample, Kemio automatically detects the optimum measurement range by switching between sensitivity stages. Each test parameter and corresponding sensor is calibrated to deliver results from the required sensitivity ranges. As Palintest sensor products are only measured using Sensitivity Ranges 1-3 and their performance is validated through check standards S1-S3, no existing test parameters or sensor calibrations require access to sensitivity range S4. Therefore, for your convenience, we have removed the need to validate with the Check Standard 4.

As a result, Check Standard S4 will no longer be requested during Check Standard Mode measurements and will no longer be supplied with the Kemio instrument. Our firmware has been updated to reflect these changes and can be downloaded from our website here.

Palintest will continue to calibrate Check Standard S4 during manufacture, however all measurements will be limited to sensitivity ranges Stages 1 to 3 and Stage 4 will be reserved for future developments.

If you would like to learn more or have questions related to Kemio, please get in touch with our technical team here.

Check your Lumiso software version on your instrument. The version number will appear on the bottom right of the screen when the instrument is turned on, as shown in the image below. The latest Lumiso software can be found on the downloads tab of the Lumiso product pages. If the version numbers do not match, the instrument does not have the latest software and requires an update.

To update your Lumiso instrument follow these simple steps:

  1. Save the latest software from our website on your desktop (or other file location).
  2. Connect the instrument to the computer via USB. The instrument should appear as a removable disk in File Explorer.
  3. Drag and drop the new software onto the instrument. .
  4. Your Lumiso is now updated with the latest software. The version number on the instrument should match the version number from the website product page.




If the Check Standard readings indicate that the instrument is ‘out of calibration’ there are a few things you can try prior to arranging servicing/ recalibration of the instrument.

We would recommend that you carefully clean the photometer, especially the cell holder and optical windows, using a soft cloth and antistatic foam cleaner. Once this has been thoroughly cleaned, try re-reading the standards.

Please also carefully check the following:

  • That the date on the standards’ certificate hasn’t expired
  • That your instrument is listed on the certificate
  • That the serial numbers on the standards match those on the certificate
  • That the standards are in good condition

If these are not correct, we would recommend first obtaining a new set of check standards for your instrument.

Failing this, please contact Palintest or your local Palintest Distributor to arrange for servicing and recalibration of your instrument.

Important: If returning an instrument to our service department please let us know that the instrument is incorrectly reading the check standards with details of the part and serial numbers of the standards and which of them is failing to read correctly

Lumiso works like other photometers, by measuring the amount of light that passes through the sample in comparison to the blank. This is known as the “Percentage Transmission” or “%T”. This %T value is mathematically converted by the software to a mg/L concentration.

Therefore, to verify that the instrument is performing within calibration it is only necessary to check that the instrument measures correct values of %T at each wavelength of light it uses. If the instrument is reading the %T value correctly according to the certificate, the correct mg/L value will be displayed when testing.

Error messages usually indicate that your photometer has detected something that might affect the result of a test. Some error messages are a warning and will still allow you to perform tests. For others, the error will be considered critical and the instrument will prevent a test being performed.

Please check your instrument’s User Manual for details of what the error message means.

See the rest of the FAQs

Explore our content hub

Contact Technical Support