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Precisa Moisture Analyzer XM120-HR User Manual: In-Depth Usage Guide

I. Product Overview and Technical Advantages

The Precisa XM120-HR Moisture Analyzer is designed based on the thermogravimetric principle, specifically tailored for rapid determination of moisture content in powder and liquid samples within laboratory and industrial environments. Its notable technical advantages include:

  • High-Precision Weighing Technology: Maximum weighing capacity of 124g with a resolution of 0.001g (0.0001g in HR mode), complying with international standards.
  • Intelligent Drying Control: Supports a three-stage heating program (standard/fast/gentle modes) with a temperature range of 30°C–230°C and customizable drying endpoint conditions.
  • Data Management Functionality: Built-in storage for 50 methods and 999 measurement records, supporting batch data management and adhering to GLP (Good Laboratory Practice) standards.
  • User-Friendly Design: Features a 7-inch touchscreen, multilingual interface (including Chinese), and an RS232 port for remote control and data export.

II. Device Installation and Initial Configuration

  1. Unpacking and Assembly
    • Component List: Main unit, power cord, windshield (1 piece), sample pan holder (2 pieces), sample tweezers (3 pieces), and 80 aluminum sample pans.
    • Assembly Steps:
      • Embed the windshield smoothly into the top slot of the main unit.
      • Install the sample pan holder and rotate to lock it in place.
      • Insert the sample tweezers, ensuring they are secure.
  2. Environmental Requirements
    • Location Selection: Place on a level, vibration-free surface with an ambient temperature of 5°C–40°C and humidity of 25%–85% (non-condensing).
    • Power Connection: Use only the original power cord and ensure reliable grounding. Confirm voltage compatibility for 230V and 115V versions; modifications are prohibited.
  3. Initial Calibration and Leveling
    • Leveling: Adjust the feet at the bottom to center the level bubble. Recalibrate after each device relocation.
    • Weight Calibration:
      • Enter the menu and select “External Calibration” mode. Place a 100g standard weight (accuracy ≤0.001g).
      • Save the data as prompted and verify the error after calibration.

III. Detailed Operation Procedures

  1. Sample Preparation and Measurement
    • Sample Handling:
      • Solid Samples: Grind into a uniform powder and spread evenly on the sample pan (thickness ≤3mm).
      • Liquid Samples: Use glass fiber pads to prevent splashing.
    • Starting Measurement:
      • Press the 《TARE》 button to zero the scale, place the sample, and close the windshield.
      • Select a preset method or customize parameters, then press 《START》 to initiate.
  2. Drying Program Setup
    • Multi-Stage Heating:
      • Stage I (Default): 105°C standard mode for 3 minutes, targeting 75% moisture removal.
      • Stages II/III: Activate higher temperatures or extend durations for difficult-to-volatilize samples.
    • Stopping Conditions:
      • Automatic Stop: When the weight change rate falls below the set value.
      • Time Stop: Maximum drying time limit.
      • AdaptStop: Intelligently determines the drying endpoint to avoid overheating.
  3. Data Recording and Export
    • Batch Processing: Create batches and automatically number samples.
    • Printing Reports: Output complete reports using the 《PRINT》 button.
    • RS232 Transmission: Connect to a computer and send the “PRT” command to export raw data.

IV. Advanced Functions and Maintenance

  1. Temperature Calibration
    • Calibration Tools: Use an optional temperature sensor (Model 350-8585), insert it into the sample chamber, and connect via RS232.
    • Steps:
      • Calibrate at 100°C and 160°C, inputting the actual measured values.
      • Save the data, and the system will automatically correct temperature deviations.
  2. Software Upgrade
    • Download the update tool from the Precisa website, connect to a PC using a data cable (RJ45-DB9), and follow the prompts to complete the firmware upgrade.
  3. Daily Maintenance
    • Cleaning: Wipe the sample chamber weekly with a soft cloth, avoiding contact with solvents on electronic components.
    • Troubleshooting:
      • Display “OL”: Overload, check sample weight.
      • Printing garbled text: Verify interface settings.
      • Heating abnormalities: Replace the fuse.

V. Safety Precautions

  • Do not analyze flammable or explosive samples, such as ethanol or acetone.
  • Avoid direct contact with the heating unit (which can reach 230°C) during the drying process; use sample tweezers for operation.
  • Disconnect the power when not in use for extended periods, store in a dry environment, and retain the original packaging.

Conclusion

The Precisa XM120-HR Moisture Analyzer significantly enhances the efficiency and reliability of moisture detection through its modular design and intelligent algorithms. Users must fully grasp the calibration, program settings, and maintenance points outlined in this manual to maximize device performance. For special samples, refer to the relevant techniques in the manual and optimize parameters through preliminary experiments.