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Liquid Working Medium Inspection Criteria
Table A-1 Liquid working medium inspection criteria
No. |
Test Item |
Test Indicator |
Test Method or Instrument |
|---|---|---|---|
1 |
pH value |
≥ 6.5 |
pH meter |
2 |
Ethylene glycol concentration |
25±5% (volume concentration) |
Ethylene glycol concentration tester (freeze point tester or refractometer) |
3 |
Total microorganism count |
< 105 CFU/mL |
Fluorescent staining |
4 |
Air filter |
No visible impurities |
Visual check |