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If you are experiencing issues with your PPM readings, clean the sample area of the unit using high grade IPA and change the secondary window film, then try running the sample in a new sample cup and film. If the problem persists, please contact XOS Technical Support at support@xos.com. For faster support, please attach clear picture of the error on your screen and attach it to your email.
For other issues please contact XOS Technical Support and if it is a fault please write down the exact wording on the screen. Let the Support member know of any other issues that you may be experiencing.