Sampling tips

For optimal sampling with the Affirma Lubricant Analysis System, follow these guidelines:

• A background measurement is required at predefined intervals during continuous use. The workflows display a message when a background is needed. Use the Run Background workflow in the HATR Setup category to acquire a background spectrum. The background is measured through the ATR crystal (make sure it is clean). We recommend that the time between background collections does not exceed 2 hours.
• The Affirma Lubricant Analysis System can be used to measure aqueous and organic liquids as well as viscous materials such as gels, oils and greases.
• Use one of the sample workflows in the HATR In-Service Lubricant group to run a sample analysis.

Sample workflows based on a differential (or subtraction) require a new oil reference spectrum. Use the Collect Reference workflow in the HATR Setup category to acquire a spectrum from your reference material.

• To apply a sample for measurement, use a disposable pipette to add just enough sample to cover the ATR crystal completely and then start the measurement.

Figure 1-1: Application of sample using pipette

Do not touch the spectrometer until the measurement has completed.

• Always clean the crystal immediately after you finish the analysis. See Clean the ATR crystal for instructions.