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 FTRN Setup category to acquire a spectrum. The background is measured with nothing in the sample beam (slide the flow-through cell out of the sample holder). The time between background collections should not exceed 2 hours.
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This Affirma Lubricant Analysis System can be used to measure aqueous and organic liquids and light oils such as transmission and hydraulic engine oils. (Not intended for viscous materials such as gels, greases and heavy gear oils.)
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Use one of the sample workflows in the Affirma FTRN In-Service Lubricant group to run a sample analysis.
Sample workflows based on a differential (or subtraction) require a reference spectrum. Use the Collect Reference workflow in the FTRN Setup category to acquire a spectrum from your reference material.
- To inject a sample for measurement, follow these guidelines:
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Splash hazard. Avoid applying excessive pressure to the flow-through cell (via the syringe). Sudden leaks can cause a skin and eyes splash hazard. |
Draw 1 t o 2 ml of sample into a clean 10 ml Luer-Lok syringe. Screw the end of the syringe into the adapter on the flow cell inlet tubing and slowly inject enough sample to fill the cell (0.3 to 0.4 ml). Continue injecting sample until it starts to flow into the outlet tubing. If bubbles appear in the outlet tubing, continue injecting sample until no more bubbles are expelled.
Start the measurement. Do not disconnect the syringe until the measurement has completed.
- Always clean the cell immediately after you finish the analysis. See Clean the flow-through cell for details.