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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.
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1. Reagent Formulations Will Differ Depending on the Manufacturer
2. Optical Set-Up of the Instrument Will Differ Depending on Manufacturer
3. Our Photometers are Calibrated Based on our Reagent Formulations
4. Accuracy Levels are Stated Based on the Specific Optical Set Up and Reagent Formulation
Find out more information by reading our article
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.
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:
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.
Check standards are used to determine if an instrument is still within calibration.
Photometers work by sending light through the sample, check standards for these instruments are usually either Coloured Solutions or Neutral Density Filters (NDF). Both types have known and certified transmittance or absorbance values so they should give these values when read in a photometer. To make the checking process even simpler some instruments will convert these to a parameter such as chlorine and give the value mg/L. The ‘target’ value is on the certificate supplied with the set of Check Standards.
Kemio and sensor instrument check standards verify that the instrument correctly measures electric signals. As with electrochemical sensors in samples, the 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. Check standard kits come with three standards to test across the measurement range.
