Standard Operating Procedure and Accurate Reading Techniques for XHR-150 Manual Rockwell Hardness Tester

Mastering the XHR-150 Manual Rockwell Hardness Tester: Standard Operation and Precision Reading Techniques

When it comes to ensuring reliable hardness testing data, the XHR-150 Manual Rockwell Hardness Tester stands out with its seamless blend of precision and ease of use — all without requiring any power source. Whether you’re an experienced technician or just starting, understanding the proper operation process and reading the dial accurately is essential to optimize your testing workflow and enhance data integrity in line with international standards like GB/T230.2-2018.

Why Choose the XHR-150 Manual Rockwell Hardness Tester?

This instrument’s integrated cast hydraulic buffer and frictionless spindle design enable smooth loading and unloading of test force, dramatically reducing human errors often found in manual measurements. Its compact, portable design eliminates dependency on electricity, making it ideal for on-site material hardness testing across diverse industrial environments.

Standard Operating Procedure: Step-by-Step Guide

1. Sample Preparation: Ensure that the test surface is flat, clean, and at room temperature. Rough or uneven surfaces can skew measurements.
2. Select the Correct Loading Method: Choose the appropriate indentation scale (e.g., HRB, HRC) based on the material type and thickness.
3. Place the Test Sample: Position the workpiece securely on the anvil, avoiding any movement.
4. Apply Preliminary Load: Gently turn the loading wheel to apply the minor load. Confirm that the needle is stable at zero after this initial force.
5. Apply Main Load Using the Hydraulic Buffer: Smoothly engage the hydraulic buffer to add the main test load. This avoids impact or overloading, preserving sample integrity.
6. Obtain Dial Reading: Once the dial stabilizes, record the hardness value precisely.
7. Release Load Gradually: Use the hydraulic buffer to smoothly remove the applied load to prevent damage or unusual needle drift.

Optimizing Impact Force and Speed for Accuracy

The impact force and its application speed directly influence measurement precision. For softer materials, a slower load application prevents plastic deformation beyond the intended indentation. Conversely, harder materials may require faster loading for clear readings. The XHR-150 facilitates fine adjustments that comply with global test methods, eliminating guesswork.

Utilizing the Frictionless Spindle & Hydraulic Buffer

Thanks to its frictionless spindle design, the XHR-150 prevents mechanical drag that can lead to inaccurate dial deflections or inconsistent readings. Coupled with the integrated cast hydraulic buffer, this ensures a stable, controlled application and release of load, a critical factor in reducing operator-induced variance.

Maintenance & Troubleshooting Tips for Longevity

Regular maintenance extends your instrument’s service life and ensures ongoing test reliability. Follow these key practices:

• Clean the spindle and anvil with a lint-free cloth to avoid contamination after each use.
• Calibrate periodically using certified reference blocks to maintain accuracy within ±1 HR point.
• Check the hydraulic buffer for leaks or sluggish performance and refill or replace hydraulic oil as recommended.
• Diagnose common faults such as needle jitter or zero-offset using the provided checklist:

Quick FAQ: Enhancing Your Testing Confidence

Q: How often should I calibrate the XHR-150?

A: Calibration is recommended every 3 months, but frequency depends on usage volume and test criticality.

Q: Can the tester measure all types of metals?

A: Yes, it supports carbon steels, stainless steels, and non-ferrous metals by adjusting settings accordingly.

Q: Is any electricity or battery power required?

A: No, the XHR-150 operates fully manually, ideal for remote locations without power supply.

Q: How do I avoid operator-induced errors?

Follow standardized loading and unloading steps, use the hydraulic buffer correctly, and perform regular maintenance.

For comprehensive help and service, rely on our dedicated support team, ensuring your XHR-150 provides precise and consistent hardness results over years of rigorous use.