Stanlay Material & Coating Thickness Gauges : Equostat

Material & Coating Thickness Gauges : Equostat

The Equostat 3 hardness tester can be connected both to the portable Equotip 3 platform and directly to the PC, with graphic user guidance.

Hardness Measurements made easy : Stationary hardness testers can only accomodate test pieces of limited size. Moreover, transportation of the test pieces is often impractical. On the other end of the spectrum, Leeb rebound tests have limitations in terms of minimum sample mass and thickness. The Equostat 3 works well in outdoor, factory and lab environments, and has only very few requirements on test piece geometries. The Equostat 3 probe can be connected directly to a laptop or PC, on which live user guidance dialogs as well as the hardness readings are displayed. Alternatively, the probe plugs into the Equotip 3 indicating device to combine the Rockwell principle of Equostat 3 with the Leeb rebound principle of Equotip to become the most versatile hardness tester.

Stable Measurements according to DIN 50157 and ASTM B724 : The Equostat 3 displays the signal curve as well as operating instructions in real time. This enables users to achieve the most repeatable measurements of any commercially available hardness tester. Compared to stationary testers, Equostat 3 uses a sharper indenter and smaller loads. The test method is standardized both according to DIN 50157 (metals) and ASTM B724 (aluminum). The conversions from Rockwell hardness to many other scales follow the ISO 18265 and the ASTM E140 tables, respectively.

Features

Information

Requirements

Uniqueness : The first hardness tester that connects directly to a PC and to the portable Equotip 3 testing platform.

User guidance : The user is instructed precisely when to apply and release the test loads; the displayed signal curve enables the user to judge the quality of the measurement.

Repeatability : Unmatched by the competition.

Robustness : The new Equostat 3 indenter is extremely durable; the probe features a protective rubber sleeve.

Versatility : Measuring clamp, magnetic feet, and special feet adapt to most sample shapes.

Standards conformance : Method conforms to DIN 50157 and ASTM B724 with ISO 18265 and ASTM E140 conversions, respectively.

Software : The included PC software package Equolink 3 addresses professional data management needs.

Equostat 3 Probe

Measuring range

19-70 HRC; 19-70 HMMRC; 67-638 HB; 35-950 HV; 60-86 HRA; 29-107 HRB; 225-2250 MPa; 69-94 HR15N; 88-96 HR15T

Resolution

0.1 μm; 0.1 HRA; 0.1 HRB; 0.1 HRC; 0.1 HRE; 0.1 HRH; 0.1 HR15N; 0.1 HR15T; 1 HB; 1 HV; 0.1 HS; 1 MPa

Measuring accuracy

~ ± 1.5 HRC over entire range

Maximum test hardness

70 HRC

Test direction

any direction (no correction required)

Test loads

10 N / 50 N (probe 50 N)

Diamond indenter

angle 100.0° ± 0.5°

Equotip 3 Indicating Device

Dimensions

170 x 200 x 45 mm (6.7 x 7.9 x 1.8 inches)

Weight

780 g (27.5 oz) plus battery pack 120 g (4.2 oz)

Display

4.7" QVGA LCD with adjustable contrast and backlight

Internal data storage

100'000 - 1'000'000 values (depending on data type)

Interface

Ethernet, USB 1.1, RS 232

Battery type

rechargeable Li ion or 3 standard size "C" cells

Battery max. charge voltage

4.2 V

Battery operation period

typically 10 hours

Operating temperature

0 to + 50 °C (32 to 122 °F)

Humidity

non-condensing, 90% max

Item Code

Equostat 3

The Portable Rockwell Principle :
The hardness testing principle in Equostat 3 follows the Rockwell stationary test. During measurements with the Equostat 3 probe, a diamond indenter is forced into the test piece to be measured and then released back out of the material. The indentation depth of the diamond is continuously measured while the load is applied and released. From the indentation depths d1 and d2 recorded at two defined loads, the difference is calculated: Δ = d2 – d1. The difference Δ is a measure of the hardness of the material, and is independent of the test direction. There are three main differences to traditional stationary Rockwell tests: 1. The test loads are lower. 2. The Equostat 3 indenter is sharper. 3. The holding times during a test are shorter.
Functionality that fits your Needs :
Measurement on Basis of DIN 50157 : Both depth measurements d1 and d2 are taken at preload, first during application (d1) and then after release of the total load (d2). The difference between the depths d1 and d2 originates from the deformation response of the material to penetration. Measurement on Basis of ASTM B724 : The depth measurements are taken at preload (d1) and at the total load (d2), respectively. User guidance dialogs : The measurement signal is displayed in real-time on a PC screen or the Equotip 3 indicating device. This allows the user to judge the quality of the ongoing measurement through evaluation of the signal curve.

Measurements are Non-Destructive :
Due to the low test loads, Equostat 3 only penetrates a few micrometers of the test piece, making the test particularly suitable for: • Scratch-sensitive and polished surfaces • Thin parts, profiles and pipes with a wall thickness ≤ 2 mm • Hardness profiles in heat-affected zone of welds

Probe setup	Minimum test piece thickness	Maximum test piece thickness	Test piece surface condition	Surface curvature	Maximum test piece hardness	Minimum spacing
50 N probe with clamp	1 mm at ~20 HB 130 μm at ~70 HRC	41 mm	recommended mean surface roughness Ra < 2 μm to minimize data scatter		70 HRC	three times the diameter of a test indentation
50 N probe with round standard foot (ø = 42 mm)		N/A		foot to be used for plane surfaces
50 N probe with tripod				very small curvatures acceptable
50 N probe with long foot				very small curvatures acceptable	recommended < 60 HRC
50 N probe with special feet				18 - 70 mm radius of curvature or 70 mm - ∞	70 HRC
The Right Measuring Setup for the Application :
To access various test locations and to accommodate user preferences, the Equostat 3 offers a range of adaptors. The measuring clamp can easily be adjusted to the sample thickness. Additional adaptors for bolts, wires and thin tubes further allow measurements on different sample geometries. The round foot, the tripod and the long foot are designed for flat surfaces. The magnetic insets in the feet aid in the testing of steel samples. The two special feet can be adjusted to the sample radius to be used for cylindrical samples from 18 mm - 70 mm and 70 mm - ∞, respectively. Equostat 3 can be automated with third-party remote one-axis test setups and the Equotip 3 Automation Package.

Product by Type

Material & Coating Thickness Gauges

Equostat

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