Hydrometer for density measurement of buttermilk serum
1Key Takeaways
Standard Name: Hydrometer for density measurement of buttermilk serum Standard Number: DIN 10293:2024-05 Scope: This standard specifies the requirements for hydrometers used to measure the density of buttermilk serum. It includes technical requirements such as construction, materials, measurement range, an…
2Expert Interpretation
This article comprehensively interprets the technical specifications of the German DIN 10293:2024 standard for buttermilk serum densitometers, including key details such as instrument structure, accuracy requirements (±0.0002g/ml), and material standards (HGB3 grade glass). It also compares the updated key points of the 1962 version of the standard and provides implementation recommendations for dairy product testing.
Background of Standard Update and Technological Evolution
DIN 10293:2024, as the replacement standard for the 1962 version, mainly updates the following technical parameters of whey density meter:
| Technical Indicators | 1962 Edition | 2024 Edition | |||||
|---|---|---|---|---|---|---|---|
| Measuring range | Unspecified | 1.014-1.030g/ml | |||||
| Graduation value | 0.0005g/ml |
| Components | Requirements |
|---|---|
| Glass body | Transparent glass, grade HGB3, in accordance with DIN ISO 719 |
| Scale carrier | Moisture-proof paper or equivalent material |
Implementation recommendations
Test environment control
The laboratory temperature must be kept stable at 20±0.5℃. The following steps are recommended:
- Sample pretreatment: Buttermilk serum must be placed in a 40℃ water bath for 30 minutes
- Instrument calibration: Use standard density liquid to verify that the error is ≤±0.0002g/ml
- Reading method: Read the scale on the concave part of the liquid surface according to the requirements of clause 4.11
Maintenance points
The density meter should be cleaned with deionized water immediately after use to avoid:
- Contact with strong acid or alkali causing the scale bar to fall off
- Mechanical collision causing deformation of the glass rod