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Refrigeration Oil & Refrigerant |
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| RECOMMENDED TESTING SCHEDULE |
REFRIGERATION OIL & REFRIGERANT |
TESTING LEVELS |
| Analysis |
Method |
Explanation |
Standard Tests |
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Moisture Content |
ASTM D6304C |
Moisture determination by way of coulometric titration or the KF method. |
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Wear Metals |
ASTM D5185 |
The analysis of metals by way of ICP. |
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Contamination Metals |
ASTM D5185 |
The analysis of metals by way of ICP. |
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Additive Metals |
ASTM D5185 |
The analysis of metals by way of ICP. |
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Viscosity @ 100°C Received |
ASTM D445 |
This will be tested at 100°C to ensure compliance to specification of SAE Standards. |
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Viscosity @ 40°C |
ASTM D445 |
This will be tested at 40°C to ensure compliance to specification of Standards. |
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Viscosity @ 100°C Purged |
ASTM D445 |
The viscosity of the oil after it has been purged of refrigerant gas. |
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TAN |
ASTM D664 |
Measures the Total Acid Number or Neutralisation Number. Acid forms when base oil oxidises. |
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| Pour Point |
ASTM D97 |
To ensure fluidity at low temperatures. Oil is checked for fluidity at -25oC. |
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| Free Clorides |
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To ensure no refrigerant degradation products are present. |
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| Oil Content |
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Oil to Refrigerant Gas percentage. A check on the separator efficiency. |
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| REFRIGERANT ANALYSIS |
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Moisture Content |
ASTM D6304C |
Moisture determination by way of coulometric Karl Fischer titration. |
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| TAN |
ASTM D664 |
Measures the Total Acid Number or Neutralisation Number. Acidity can be sourced from the dissolved oxidised oil content in the refrigerant. |
YES |
| Free Chlorides |
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To ensure no refrigerant degradation products are present. |
YES |
| Oil Content |
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Refrigerant Gas to oil percentage. |
YES |
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Which tests to use 
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