User manual

153
TESTING
Tel: [phone] Fax: [phone] Partners in Precision
Premium Closed Loop Micro/Macro Vickers, Knoop
& Brinell Hardness Tester NEXUS 4000 Series
High accuracy and repeatability through Closed Loop, Load Cell and Force feedback system, 11 models available.
TEST PROCEDURE CONTROL
Traditional hardness testing systems use a "dead weight"
mechanical design or inaccurate spring force mechanism to apply
the test force. Such systems lack test control as there is no feedback
on the actual applied force. The Closed Loop technology with
a force feedback system, as applied in the NEXUS 4000 series,
constantly measures and controls the applied force on the tester’s
indenter and tested surface. Consequently, this superior control
system offers an almost unlimited selection of test loads and test
rates for virtually any test condition imaginable.
ACCURACY, RELIABILITY & EFFICIENCY
Elimination of overshoot due to sophisticated algorithms detecting
contact with the indenter and the tested object’s surface.
The application and removal of the test force is fully automatic,
as well as the positioning of the indenter and the pre-determined
objective. The result is an absolute vibration-free operation while
reducing the operator’s workload to a minimum.
UPGRADE
Upgrades on the NEXUS 4000 series are available on request. For
instance, your budget and your requirements allow a Vickers tester;
your choice could be an Eseway Vickers / Knoop tester 4300. After
your purchase you can upgrade your tester from, for instance,
Vickers to Macro, Micro Vickers or even to Brinell at a fixed price.
The upgrades are possible in the 4300 or 4500 range. Investing in
an NEXUS 4000 series tester guarantees access to almost any load
application in the Vickers, Knoop and Brinell range up to 62.5kg.
Time
Force
Selected
Force
Comm
on dead weight systems
Closed
loop
force
fe
edback
Overshoot
Closed loop vs Dead weight
Superior force control
Time
Common dead weight systems
Closed loop force feed
bac
k
Overshoot
Force
Selected
Force
Closed loop vs Dead weight
High speed measurement
Time
Force
Selected
Force
Comm
on dead weight systems
Closed
loop
force
fe
edback
Overshoot
Closed loop vs Dead weight
Superior force control
Time
Common dead weight systems
Closed loop force feed
bac
k
Overshoot
Force
Selected
Force
Closed loop vs Dead weight
High speed measurement
TECHNICAL SPECIFICATION
Test force selection Electronic, Closed Loop, Load Cell, Force feedback system, indication in Kgf or N. Test force selectable over menu operation
Test procedure Automatic, loading/dwell/unloading
Hardness value 5 digits
Loading speed Variable, depending on selected force
Turret 4 positions over 360º, fully automatic, memorised start position, option for 2 indenters and 2 objectives or 1 indenter and 3 objectives
Test force accuracy < +/-1% for force from 100gr to 30kg, < +/-1,5% for force below 100gr
User display Length of diagonals, hardness value, converted value, test force, online statistics
Display resolution 0.1 HV, HK and HB
Hardness conversion Rockwell, Rockwell Superficial, Brinell, Leeb & Tensile
Standardisation EN, ISO 6507, EN ISO 6506, EN ISO 4545, ASTM E-384, ASTM E-10-08, ASTM E-384
Statistics Total test, max, min, average, range, standard deviation, all in real time after each test
Control panel Start test, stop test, light intensity, dwell time, print, clear, menu operation for date, time, scale and load settings, language
Firmware V2.01, German, English, French (standard), V2.02, English, Italian, Spanish
Memory Memory for 20 test results, with INNOVAVIEW software unlimited results
Data output RS-232 Bi-Directional
Loading mechanism Fully automatic, Closed Loop, Force feedback, loading, dwell, unloading
Dwell time setting Default 5 seconds, user defined 0 to 60 seconds
Printer Built in, silent high speed thermal printer
Eyepiece microscope Bright dual line filar eyepiece with 15x magnification, 0.1µm reading
Light source Halogen 12V, 30 watt, green filter, dimmable
Optical path 2 way, eyepiece / camera
Vertical Range 165mm (maximum specimen height)
Horizontal Range 135mm (from centre line)
Stage dimensions 100x100mm, travel 20x20mm, and reading 0.01mm
Operating temperature 5ºC to 40ºC (+/-20º for force 25gr and 50gr)
Humidity 10% to 90% non condensing
Dimensions 220 x 540 x 650mm
Weight 51Kg
Power 220V/110V, 50/60Hz, single phase
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