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7.
Oil Sample Preparation
7.1 – FIXER FILTERED SOLVENT AND OIL
Fixer (a solvent passed through a 0.45 micron filter) is used to cut the lubricant sample for normal
operation. Its function is to loosen wear particles from gels that may form during periods of storage and
reduce sample viscosity so that it freely flows through the FM-6 sample tube (PN 74-0280). Trico
provides fixer in 400 ml bottles. Refer to Section 5, Consumables and Accessories for details.
Filtered oil (mineral oil passed through a 0.45 micron filter) is utilized to dilute the original sample which
may contain high concentrations of wear particles that pile up on the Ferrogram, thus masking their true
size and shape. For example, 9 ml of filtered oil added to 1 ml of sample produces a 10-to-1 dilution.
When filtered oil is used, testing is carried out in the normal manner. Trico offers filtered oil in 400 ml
bottles. Refer to Section 5, Consumables and Accessories for details.
7.2 – DISPENSERS
Dispensers are mechanical devices that draw fluid from a supply container and deliver measured amounts
to a test container. Two types are offered.
Dispenser Assembly:
The dispenser assembly (refer to Figure 7.1) is used to extract fluid from the 400
ml fixer and filtered oil bottles. It accurately dispenses 1 ml into a test sample vial.
Pipette Dispenser:
The pipette dispenser (refer to Figure 7.2) is used to extract fluids from the sample
bottle to place into a sample vial. It accurately delivers 1 ml of fluid. A disposable pipette tip, which
comes in contact with the fluid, fits on the pipette dispenser and is discarded after each test sample to
avoid contamination of subsequent samples.
Figure 7.1 – Dispenser Assembly
Figure 7.2 – Pipette Dispenser
Summary of Contents for FM-6
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