How to take an oil sample?

Taking oil samples from a hydraulic system

The quality of the result of the oil sample analysis depends 95% on the correct collection of the sample. It is important to follow best practices for sample collection to ensure accurate results.

How to take the sample correctly!

Make sure the unit runs for at least 30 minutes before taking a sample to ensure uniform contamination throughout the oil.
Open the sampling valve and flush at least 1 liter of liquid through your sampling device. The valve should not be closed after flushing. When using a sampling tube, at least 3 – 4 liters of liquid should be flushed.
Make sure that no contamination occurs when you open the sample bottles.
Fill the bottles halfway and rinse them out, then discard the liquid.
Rinse the sampling bottles a second time.
Collect sufficient liquid and fill the sample bottles.
Close the bottles properly.
Close the sampling valve while collecting the sample (do not touch the valve during collection).
Label samples correctly and take all necessary actions.

Sampling methods

The best method for sampling is to use online sampling devices.

Always take the sample from turbulent flow zones.
Always use a stabilizing rod when using a sampling tube or gun.
Always take the sample in front of a filter.

Safety instructions

Always wear appropriate protective equipment during sampling and observe specific safety and environmental requirements on site.
Check the liquid temperature before starting sampling.
Make sure the bottle material is compatible with the liquid.
Record the system pressure and ensure that the sampling device is safe to use at the specified pressure.

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