Tips And Assistance; Questions And Answers; Accessories And Spare Parts - TESTO 552 Instruction Manual

6 Tips and assistance

6 Tips and assistance

6.1 Questions and answers

Question
Readings are incorrect.
Instrument displays oooooo
If we have not been able to answer your question, please contact your dealer or
Testo Customer Service. You will find contact details on the back of this
document or on the website
www.testo.com/service-contact

6.2 Accessories and spare parts

Description
Connecting cable for testo 552
26
Possible cause / solution
- Check that the testo 552 is connected
properly.
- Connect the testo 552 directly to the
vacuum pump in order to check the values.
- Check that all hoses are leak-tight.
- Clean the sensor as described in the
Cleaning the instrument
The applied pressure is outside the specified
measuring range. (0 to 20,000 microns).
section.
Item no.
0554 5520