คู่มือผู้ใช้เครื่องวัดค่าการหักเหของสารหล่อเย็นและแบตเตอรี่ Robinair 75240
รุ่น : 75240
การแนะนำ
The Robinair 75240 Coolant and Battery Refractometer is a precision optical instrument designed for accurately measuring the freeze point of engine coolants (ethylene glycol and propylene glycol based) and the specific gravity of battery electrolyte solutions. This handheld device provides quick and reliable readings essential for vehicle maintenance and ensuring optimal performance in various temperature conditions.
เนื้อหาชุด
The complete Robinair 75240 kit includes the following components:
- Refractometer with rugged aluminum housing
- ที่หยอดตา
- Screwdriver (for calibration)
- Vial of distilled water (for calibration)
- ผ้าเช็ดทำความสะอาด
- Foam-lined rigid plastic case
- Usage instructions (this manual)
Image: The complete Robinair 75240 kit, including the refractometer, eyedropper, screwdriver, distilled water vial, cleaning cloth, and protective case.
การตั้งค่าและการสอบเทียบ
- Focusing the Eyepiece: Look through the eyepiece and rotate the diopter adjustment ring until the scale is clearly in focus.
- ขั้นตอนการสอบเทียบ:
- เปิดฝาครอบ
- Place 2-3 drops of distilled water onto the main prism.
- Close the cover plate gently, ensuring the water spreads evenly across the prism surface without air bubbles.
- Wait approximately 30 seconds for the sample to reach the ambient temperature of the refractometer.
- Point the front end of the refractometer towards a light source and look through the eyepiece.
- The blue/white boundary line should align with the "WATERLINE" or "0" mark on the scale.
- If it does not, use the provided screwdriver to turn the calibration screw (located under the rubber cap) until the boundary line is precisely at the "WATERLINE" or "0" mark.
- Wipe the prism and cover plate dry with the cleaning cloth after calibration.
คำแนะนำการใช้งาน
ทำตามขั้นตอนเหล่านี้เพื่อการวัดที่แม่นยำ:
- ตรวจสอบให้แน่ใจว่าเครื่องวัดดัชนีหักเหแสงสะอาดและได้รับการสอบเทียบแล้ว
- เปิดฝาครอบ
- Using the eyedropper, place 2-3 drops of the sample liquid (coolant or battery electrolyte) onto the main prism.
- Close the cover plate gently, ensuring the liquid spreads evenly across the prism surface without air bubbles.
- Wait approximately 30 seconds for the sample to reach the ambient temperature of the refractometer.
- Point the front end of the refractometer towards a light source and look through the eyepiece.
- Read the value where the blue/white boundary line crosses the appropriate scale.
- After each use, clean the prism and cover plate thoroughly with the cleaning cloth.
Measuring Coolant Freeze Point
The refractometer features scales for both Ethylene Glycol (EG) and Propylene Glycol (PG) based coolants. Identify the type of coolant being tested and read the corresponding scale. The reading indicates the freeze protection temperature in degrees Fahrenheit.
- Ethylene Glycol Scale: Typically marked "EG" or "Ethylene Glycol".
- Propylene Glycol Scale: Typically marked "PG" or "Propylene Glycol".
- ช่วงสเกล: -60°F ถึง +32°F
Measuring Battery Electrolyte Specific Gravity
The refractometer also includes a scale for checking the specific gravity of battery electrolyte solutions. This indicates the charge level of lead-acid batteries.
- Battery Electrolyte Scale: Typically marked "BATTERY FLUID" or "SG".
- Read the specific gravity value directly from this scale.
- Consult your battery manufacturer's specifications for optimal specific gravity ranges.
การซ่อมบำรุง
- การทำความสะอาด: Always clean the prism and cover plate with the provided cleaning cloth after each use. Do not rinse the refractometer under running water or immerse it in liquid.
- พื้นที่จัดเก็บ: Store the refractometer in its protective foam-lined case when not in use. Keep it in a dry, cool place, away from direct sunlight and extreme temperatures.
- การจัดการ: Handle the instrument with care. Avoid dropping it or subjecting it to harsh impacts.
การแก้ไขปัญหา
| ปัญหา | สาเหตุที่เป็นไปได้ | สารละลาย |
|---|---|---|
| Scale is blurry or out of focus. | Eyepiece not adjusted. | Rotate the diopter adjustment ring until the scale is clear. |
| การอ่านที่ไม่ถูกต้อง | Instrument not calibrated; prism dirty; sample not at ambient temperature. | Recalibrate with distilled water; clean prism thoroughly; wait 30 seconds for temperature stabilization. |
| Blue/white boundary line not visible. | Insufficient light; sample too dark or opaque. | Point towards a brighter light source; ensure sample is clear enough for testing. |
ข้อมูลจำเพาะ
- แบบอย่าง: โรบินแอร์ 75240
- Measurement Range (Coolant): -60°F to +32°F (Ethylene Glycol and Propylene Glycol)
- Measurement Range (Battery Electrolyte): Specific Gravity (SG)
- วัสดุ: ตัวเรือนอลูมิเนียม
- ขนาด : Approximately 26.42 x 20.83 x 13.72 cm (packaged)
- น้ำหนัก: Approximately 408 g (packaged)
- เลนส์: High-quality with ultra-smooth focusing
การรับประกันและการสนับสนุน
Robinair products are manufactured to high standards. For warranty information, technical support, or service inquiries, please contact Robinair customer service or visit the official Robinair website. As a Bosch Automotive Service Solutions brand, Robinair is committed to providing quality tools and support.
For further assistance, please refer to the contact information provided with your purchase or on the official Robinair webเว็บไซต์.
