Enpaix EPX300 User Manual

Portable Hardness Tester

1 Introduction

1.1 Principle

1.2 Structure

1.3 Specifications

2 Test
2.1 Instrument Preparation
2.2 Specimen Preparation
2.3 Test Procedure
2.4 Browse
2.5 Printing
3 Setup
3.1 Material
3.2 Direction
3.3 Scale
3.4 Clock
3) Display
Clock
Mat'L
Material Code
Impact Direction
Impact Times
4) Keypad
❶In measurement mode, press and hold it to erase
the measured data. Or if the mini-printer is linked
with the display unit, it will print out those data.
❷In other mode, press it to complete setup and
save the parameters and return to the
measurement mode.
Browse data in memory
Adjust date and time.
❶ In measurement mode, press it to
DIR setup the impact direction.
❷In Date/Time setup mode and
calibration mode, press it to increase
the flickering bit.
❸In browse mode, press it to display
the previous data.
❶In measurement mode, press it to
MAT
select the material.
❷In Date/Time setup mode and
calibration mode, press it to select
the next bit.
EPX300
4 Maintenance
4.1 Routine Maintenance
4.2 Calibration
4.3 System Reset
Appendix
A-1 Hardness Conversion
A-2 Tensile StrenghConversion
Avg.
Conversion Average
HRC
Conversion Scale
Conversion
HL Average
Avg.
HL Value
HL
Pressing and holding to
turn on/off power.
Turn on/off the LCD
backlight
DIR
DEL
SCALE
❶In measurement mode, press it to
SCALE
setup the conversion scale.
❷In Date/Time setup mode and
calibration mode, press it to decrease
the flickering bit.
❸In browse mode, press it to display
the next data. measurement mode or
browse mode.
Press and hold it to delete current data
DEL
in measurement mode or browse mode.
. 2 .
1 Introduction
1.1 Principle
The tester measuring principle is physically a
rather simple, dynamic hardness tester.
An impact body with a hard metal test tip is
propelled by spring force against the surface of
the test piece. Surface deformation takes place
when the impact body hits the test surface,
which will result in loss of kinetic energy.
The energy loss is calculated by velocity
measurements when the impact body is at a
precise distance from the surface for both the
impact and rebound phase of the test. The permanent magnet in the
impact body generates an induction voltage in
the single coil of the impact device. The
voltage of the signal is proportional to the
velocity of the impact body, and signal
processing by the electronics provides the
hardness reading for display and storage.
1.2 Structure
1) Display Unit
EPX300
LCD
Signal Cable
Cell Cover Material Code
1.3 Specifications
●
 Display Range
● :
 Accuracy
● :
 Resolution
●
 Impact Energy
●
 Mass of Impact Body
● :
 Test Tip
● :
 Power
●
 Operating Temperature
●
Storage Temperature
● :
 Dimensions
● :
 Weight
●
 Conforms to Standard
MAT
Impact
2) Impact Device
Release Button
DIR
DEL MAT
Loading Tube
SCALE
D
Portable Hardness Tester
DC
Standardized
according to
ASTM A956
Φ20
. 1 .
: ～
0 999HLD
±6 HL(at 800HLD)
1 (HL,HV,HB, HSD , MPa ); 0.1(HRC,HRB)
:
11 Nmm
:
5.5g
Φ3mm tungsten carbide ball
3 *1.5V AAA Batteries
:
0°C~+50°C (32°F~122°F)
:
-10°C~+60°C (14°F~140°F)
150*80*24mm(Display unit), Impact length
Approx.200g(display unit)
Impact device 75g(Type D), 50g (Type DC)
:
ASTM A956 & DIN50156
POLYGON Instrument Ltd.
V
impact
HL=1000*
V
rebound
Time
Rebound
Cable
Catch Chuck
Impact Body
Coil
Support Ring