Tag: Density Meter

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 Density Meter Comprehensive Guide: Operating Principles, Brands,Usage, Faults, and Maintenance

Density Meter Overview

The Density Meter is a precision instrument used to measure the density of objects. It finds wide application in laboratories, industrial production, and scientific research. By measuring the mass and volume of an object, it calculates density based on the definition of mass-to-volume ratio. Capable of measuring both solid and liquid densities, the density meter offers speed, accuracy, and ease of operation.

Principles

The fundamental principle of the density meter is based on Archimedes’ Principle, which states that the buoyant force on an object in a fluid is equal to the weight of the fluid it displaces. According to this principle, density meters are designed to float in liquids and indirectly measure liquid density by assessing the relationship between buoyancy and gravity. Various types of density meters, such as oscillating tube, hydrostatic, and radioactive isotope meters, may employ different working principles, but the core idea involves inferring density by measuring the force state of an object in a liquid.

Usage

Preparation:

  • Ensure the density meter is fully powered and its indication range and accuracy meet measurement requirements.
  • Clean the measurement container to ensure no impurities.

Measurement Steps:

  1. Determine Object Mass: Use a balance to measure and record the mass of the object to be tested.
  2. Place Measurement Container: Select a suitable measurement container, place it on the density meter platform, and eliminate bubbles.
  3. Fill Liquid: Slowly pour in the liquid to be measured until the surface is stable.
  4. Place Object: Gently place the object in the container, keeping it suspended and avoiding contact with the container walls.
  5. Read Measurement: Wait for the density meter to stabilize and read the density value on the display.

Common Faults and Repairs

Power Fault:

  • Phenomenon: Unable to start normally or sudden power-off, display shows nothing or abnormally.
  • Repair: Check power cord connection, replace power socket or cord. Ensure stable power supply and avoid excessive voltage fluctuations. For internal power module faults, contact the manufacturer or professional repair personnel.

Display Fault:

  • Phenomenon: Display shows garbled characters, no display, or unclear display.
  • Repair: Gently wipe the display to remove stains. If the problem persists, try restarting the density meter or contact the manufacturer for repair.

Sensor Fault:

  • Phenomenon: Measurement results are inaccurate or abnormal.
  • Repair: Clean the sensor to remove stains. If the sensor is damaged, replace it. For sensor calibration errors, recalibrate according to the manual or contact the manufacturer.

Connection Line Fault:

  • Phenomenon: Unstable or unable to connect the density meter to a computer or other devices.
  • Repair: Check if the connection plug is tightly inserted and replace damaged connection lines.

Temperature Drift:

  • Phenomenon: Measurement results are unstable or have large deviations at different temperatures.
  • Repair: Check the working environment temperature and avoid excessively high or low temperatures. For temperature drift issues, contact the manufacturer for repair or replace with a suitable density meter.

Leakage:

  • Phenomenon: The density meter leaks, resulting in poor measurement repeatability.
  • Repair: Inspect and replace damaged seals. Ensure proper sample handling, eliminate bubbles and suspended particles before measurement.

Maintenance and Care

  • Regular Inspection: After a period of use, check the accuracy of measurement results.
  • Regular Calibration: Perform regular calibration according to manual requirements to maintain the accuracy and stability of the density meter.
  • Cleaning: Clean containers and measurement components before and after use to avoid contamination.
  • Avoid Collision and Dropping: As a precision instrument, the density meter should be protected from collisions and drops.

Summary of Repaired Density Meter Brands and Models by Longi Electromechanical

  1. Anton Paar
    • DMA Series: DMA 35, DMA 1001, DMA 4101, DMA 4501, DMA 5000 M
  2. Mettler Toledo
    • D Series: DM40, DM45, DE45
  3. Rudolph Research Analytical
    • D Series: DDM 2910, DDM 2911, DDM 2911 Plus, DDM 2911 LAB
  4. Kyoto Electronics Manufacturing (KEM)
    • DA Series: DA-130N, DA-155N, DA-650, DA-640, DA-645, DA-860
  5. Emerson
    • Micro Motion Series: Micro Motion ELITE CMFS010M, CMFS015M, CMFS025M
  6. Thermo Fisher Scientific
    • D Series: Densito 30PX, Densito 30PXU
  7. KEM
    • DA Series: DA-130N, DA-155N, DA-500
  8. DMA Lab
    • L Series: L100, L100i, L200
  9. LAUDA Scientific
    • iVisc: High-precision Density Meter
  10. Endress+Hauser
    • Liquiphant Series: FTL31, FTL33, FTL51
  11. Yokogawa
    • DM8: Fixed Density Meter
  12. KROHNE
    • Optisys Series: Optisys MCM2000, Optisys MCM1000
  13. Hach
    • Density Meter Series: 2100Q, 2100AN
  14. A&D
    • AD Series: AD-4212B, AD-4212C, AD-4212D
  15. Bopp & Reuther
    • Density Meter Series: DVO-68, DVO-69

With nearly 30 years of experience in repairing density meters, Longi Electromechanical can quickly repair various instruments. Additionally, we offer recycling and sales of various density meters. Welcome to consult.