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Overview
Sample Location
Sampling Materials (Tools, devices and other hardware)
Sampling Procedure
Sample Frequency /Interval
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Overview
Oil Sampling is the most important part of Oil Analysis Program. Failure to obtain a representative good sample, oil analysis results will not be beneficial . Two goals when getting a represntative good oil sample .
- Maximize data density or obtain the best representative sample.
Oil sample should be taken to obtain most informaton from lubrication.
- Minimize data disturbance or Minimize the least Contaminated oil sample .
It is very important to make sure that the oil sample does not contaminated during the sampling process.
To ensure maximize data density and minimize data disturbance in oil sampling ,consider the following factors:-
- Sampling Location
- Sampling Materials (Tools, devices )
- Sampling Procedure
- Sample Frequency
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Sampling Location
Not all locations in machine lube system will provide the same data. Some are good data and some are bad data. If improper location, some may be negative error result and some may be positive error. Primary Tips for oil sampling:-
- Sampling where will be downstream of lubrication
- Sampling where will be live zone and turbulence flow
- Sampling when machine is operating
Technical Article: The Basic of Used Oil Sampling
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Sampling Materials (Tools, devices and other hardware)
Sampling Procedure
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Once good sampling location and hardware are applied, there will be questions on
"how to take good sample and everytime do it the same way ."
Create specific written for each sampling location. This ensures that each sample is extracted in a consistent manner. |
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Sample Frequency /Interval
The objective of Oil Analysis Program is to find bad news and Good Sampling Method is to obtain maximize data density.
Thus, in order to achieve both aspects, Sampling Frequency have to be considered seriously. Scheduled Sample Frequency /Interval is also dependent upon many variables, such as criticality of machine, operating condition, machine age, oil age, and severe environment (dust, moisture, contaminants) etc.
Recommended Oil Sampling Frequencies:
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Engine - Diesel
| Industry - Application |
Hours |
Kilometers |
| Highway |
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15,000 kms
and just prior to oil drain
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| Off-Highway |
250 hours
and just prior to oil drain |
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Marine
Diesel Engine - Main Engine |
500 hours
or one month
and just prior to oil drain |
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| Diesel Engine - Auxiliary Engine |
500 hours
or one month
and just prior to oil drain |
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| Diesel Engine - Generator |
500 hours
or one month
and just prior to oil drain |
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| Industry - Application |
Normal Use |
Intermittent Use |
| Diesel Engine in Manufacturing and Processing Plan |
Monthly, 500 hours
and just prior to oil drain |
Quarterly
and just prior to oil drain |
| Diesel Engine as Generator |
250-500 hours
and just prior to oil drain |
Quarterly
and just prior to oil drain |
Gas Engine
| Industry - Application |
Normal Use |
Intermittent Use |
| Natural Gas Engine |
500 hours
or one month
and just prior to oil drain
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Quarterly
and just prior to oil drain |
Landfill Gas Engine
Bio Gas Engine
Sewer Gas Engine |
250 to 500 hours*
or half-month to month
and just prior to oil drain |
Quarterly
and just prior to oil drain |
Gear System
| Industry - Application |
Hours |
Kilometers |
Highway
(Gear, differential, transmissions) |
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20,000 kms
and just prior to oil drain |
Off-Highway
(Gear, differential, transmissions) |
500 hours
and just prior to oil drain |
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Marine
Gear - Main Propulsion System
Reduction gear |
500 hours
or one month
and just prior to oil drain |
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Gear - Supporting System
Deck Gear Drive |
2,000 hours
or quarterly
and just prior to oil drain |
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| Industry - Application |
Normal Use |
Intermittent Use |
Industry
Gear - low speed |
Bi-monthly, 1,000 hours
and just prior to oil drain |
Quarterly
and just prior to oil drain |
| Gear - high speed |
Monthly, 300-500 hours
and just prior to oil drain |
Quarterly
and just prior to oil drain |
Hydraulic System
| Industry - Application |
Hours |
Kilometers |
| Off-highways - Hydraulics |
500 hours
and just prior to oil drain |
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Marine
Hydraulics - Main Propulsion
Steering Gear Hydraulics |
500 hours
or one month
and just prior to oil drain |
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Hydraulics - Supporing System
Deck Hydraulics |
2,000 hours
or quarterly
and just prior to oil drain |
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| Industry - Application |
Normal Use |
Intermittent Use |
Industry - Hydraulics
Gear - low speed |
Monthly, 700 hours
and just prior to oil drain |
Quarterly
and just prior to oil drain |
Compressor (air, gas, refrigerant)
| Industry - Application |
Normal Use |
Intermittent Use |
Screw ,Rotary,Reciprocating
Centrifugal |
500 hours
or one month
and just prior to oil drain |
Quarterly
and just prior to oil drain |
Turbine (gas and steam)
Pump, Vacuum pump, Fan, Blower, Motor (gear and bearing lubrication)
| Industry - Application |
Normal Use |
Intermittent Use |
Pump, Vacuum Pump,
Fan, Blower,
Motor (gear and bearing lubrication) |
500-700 hours
or one month
and just prior to oil drain |
Quarterly
and just prior to oil drain |
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Technical Article: Establishing Effective Sampling Frequencies
Education and training may be the key factor that will make proper oil sampling method to be not impossible and does not have to be difficult.
Learn more about Oil Sampling >> Training
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Airbus Helicopters Approved Laboratory |
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Safran Approved Laboratory |
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ICML Certified Professional of FOCUSLAB Ltd. |
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