Tru-Blue II
Hardness Testing System
Since 1984, United has
manufactured computer-controlled closed loop Rockwell testers. Our
second generation Rockwell tester, the Tru-Blue II is the lowest priced
US manufactured closed loop tester that meets ASTM E18, ISO 6508
specifications and NIST recommendations.
The Tru-Blue II comes standard with a Direct certification of the hardware calibration with NIST traceability and a one-year indirect calibration for customer specified hardness scales. Along with a user friendly control panel, the tester can be put into operation without the need for an initial on-site calibration or manufacturers assistance!
Having no dead weights, pivot points and knife edges to move out of adjustment, the Tru-Blue II can be moved to a new location without having to be re-calibrated. When mounted on United’s optional mobile stand, the Tru-Blue II becomes portable for use in different departments.
Click here to download the product brochure.
Tru-Blue II Features:
- 15 regular scales.
- 15 superficial scales.
- 5 preset load dwell times including plastics.
- Computer controlled application of loads.
- Display resolution: points, tenths and hundredths.
- Serial, Parallel & PS/2 Connections.
- Statistics: Avg, range, min/max, Std deviation and number of tests.
- Vacuum fluorescent display.
- Cylindrical correction.
- Hardness value conversion.
- Parts IN/OUT limit alert.
- Bi-directional loading capability.
- Parts clamping device.
- Direct certification: Depth, load, hysteresis & timing.
- Indirect certification: B, C, 30N & 30T. Additional scales available.
- CE approved.
- 2-year warranty.
- Vertical capacities: 10, 14, 18 & 20 inches.Custom vertical heights available.
- Throat depth: 5.5 in 120-240 VAC, 50/60 Hz. Single phase, 1 amp.
Tru-Blue II Universal Features
- Rockwell: Same as Tru-Blue II
- Brinell:
- Test Forces in Kg.:2, 2.5, 4, 5, 6.25, 7.8125, 10, 15.625, 20, 30, 31.25, 40, 62.5, 100, 120, 125, 150, 187.5 and 250.
- Test Dwell Settings selectable in 1 sec. increments: 5-30
- Direct reading of Brinell indentations. One hardness range calibration.
- Vickers:
- Test Forces in Kg: 3, 5, 10, 30, 50, 100, and 120.
- Test Dwell Settings selectable in 1 sec. increments: 5-30
- Direct reading of Vickers indentations. One hardness range calibration.
NIST - Recommended Guide to Rockwell Hardness Testing
Published by the
National Institute of Standards and Technology, the Recommended
Practice Guide, Rockwell Hardness Measurement of Metallic Materials, is
essential reading for anyone concerned with hardness testing.
Written by Samuel R. Low of the National Institute of Standards and Technology, this book contains detailed information on everything related to Rockwell Hardness testing, from test procedures to references for test block standards to direct and indirect verifications. This publication resolves several questions including the following:
- How often should indirect verification be performed? (Page 54)
- Should my hardness tester be "Directly Verified"? (Page 44)
- Should machine hysteresis be checked? (Page 45)
- How does the test cycle time affect hardness readings? (Page 27)
- What about force verification? (Page 45)
- What happens if the machine forces are adjusted? (Page 45)
For the complete on-line version of this publication click here (requires Adobe Acrobat Reader).
United offers a full line of hardness accessories
Click here to see our full list of hardness tester accessoires