1. บทนำ
The KERN YDB-03 Universal Density Determination Set is designed for precise measurement of density in both liquids and solids. This set is compatible with all KERN analytical balances, providing a reliable solution for laboratory and scientific applications. It facilitates density determination for substances with densities less than or greater than 1.
This manual provides essential information for the correct setup, operation, and maintenance of your KERN YDB-03 set to ensure accurate and consistent results.
2. ขอบเขตการจัดส่ง
The KERN YDB-03 set includes the following components:
- บีกเกอร์
- เครื่องวัดอุณหภูมิ
- Sampผู้ถือเลอ
- อะแดปเตอร์
- Counter weights
- Plummet (stainless steel, 20 g)
- Universal submersible basket for solid bodies (for both floating and sinking samples). The wire diameter of this basket is 0.5 mm, complying with DIN EN ISO 1183-1 requirements.
รูปที่ 1: Assembled KERN YDB-03 Density Determination Set, showing the beaker, sample holder, and submersible basket within the support structure.
3. การตั้งค่า
Follow these steps to set up the KERN YDB-03 Density Determination Set:
- แกะส่วนประกอบ: นำชิ้นส่วนทั้งหมดออกจากบรรจุภัณฑ์อย่างระมัดระวัง และตรวจสอบดูว่ามีส่วนใดเสียหายหรือไม่
- ประกอบโครงสร้างรองรับ: Place the base plate on a stable, level surface. Attach the vertical support rods and the horizontal crossbar.
- Position Beaker: Place the provided beaker onto the designated area on the base plate.
- ติดตั้ง Sample Holder/Plummet: Depending on the measurement type (liquid or solid), attach the appropriate sample holder or plummet to the adapter, which then connects to the balance. Ensure it hangs freely within the beaker without touching the sides or bottom.
- Connect to Analytical Balance: Position the KERN YDB-03 set directly on the weighing pan of your KERN analytical balance. Ensure the balance is calibrated according to its own instruction manual.
- Fill Beaker (for liquids/submerged solids): If determining the density of a liquid or a solid submerged in a liquid, carefully fill the beaker with the reference liquid (e.g., distilled water) or the liquid to be measured. Ensure the sample holder/plummet is fully submerged.
4. คู่มือการใช้งาน
The KERN YDB-03 set is designed for use with KERN analytical balances. Refer to your specific balance's manual for detailed instructions on density determination calculations and balance operation.
4.1. Density Determination of Solids
For solids, the density is typically determined by measuring the sample's weight in air and its apparent weight when submerged in a liquid of known density (e.g., distilled water).
- Weigh in Air: Place the solid sample on the balance pan (or in the submersible basket if suitable) and record its weight (Wอากาศ).
- Weigh Submerged: Submerge the sample completely in the reference liquid (e.g., distilled water) using the universal submersible basket. Ensure no air bubbles are trapped. Record the apparent weight (Wจมอยู่ใต้น้ำ).
- Measure Liquid Temperature: Use the thermometer to measure the temperature of the reference liquid. This is crucial for determining the liquid's precise density at that temperature.
- Calculate Density: Use the formula provided in your analytical balance's manual or standard density calculation methods, considering the density of the reference liquid at the measured temperature.
4.2. Density Determination of Liquids
For liquids, the density is typically determined by measuring the apparent weight of a plummet of known volume when submerged in the liquid.
- Weigh Plummet in Air: Record the weight of the plummet in air (Pอากาศ).
- Weigh Plummet in Liquid: Submerge the plummet completely in the liquid to be measured. Ensure no air bubbles are trapped. Record the apparent weight (Pของเหลว).
- Measure Liquid Temperature: Use the thermometer to measure the temperature of the liquid.
- Calculate Density: Use the formula provided in your analytical balance's manual or standard density calculation methods, considering the known volume of the plummet.
5. การบำรุงรักษา
Proper maintenance ensures the longevity and accuracy of your KERN YDB-03 set:
- การทำความสะอาด: After each use, especially when working with corrosive liquids, thoroughly clean all components with appropriate cleaning agents. Rinse with distilled water and dry completely.
- พื้นที่จัดเก็บ: Store the set in a clean, dry environment, preferably in its original packaging or a protective case, to prevent dust accumulation and damage.
- การตรวจสอบ: Regularly inspect the submersible basket and plummet for any signs of wear, corrosion, or deformation that could affect measurement accuracy.
6 การแก้ไขปัญหา
If you encounter issues during density determination, consider the following:
- การอ่านค่าที่ไม่ถูกต้อง:
- Ensure the analytical balance is properly calibrated.
- Check for air bubbles on the submerged sample or plummet.
- Verify the temperature of the reference liquid is accurately measured and accounted for in calculations.
- รับรองว่า sample holder/plummet is not touching the beaker walls or bottom.
- Sample Floating (Solids): If a solid sample floats, use the universal submersible basket designed for floating bodies to ensure full submersion.
- ความเสียหายของส่วนประกอบ: If any component is damaged, contact KERN customer support or your supplier for replacement parts.
7. ข้อมูลจำเพาะ
- รุ่นสินค้า : KERN YDB-03
- แอปพลิเคชัน: Density determination of liquids and solids (density ≤/≥ 1)
- ความเข้ากันได้: Suitable for all KERN analytical balances
- Plummet Material: สแตนเลส
- Plummet Weight: 20 กรัม
- Submersible Basket Wire Diameter: 0.5 mm (complies with DIN EN ISO 1183-1)
8. การรับประกันและการสนับสนุน
For warranty information, technical support, or further inquiries regarding the KERN YDB-03 Universal Density Determination Set, please contact your authorized KERN dealer or refer to the official KERN website. Additional technical information and data sheets may be available upon request from Schniebel Trading.
