PCE Instruments PCE-2600N User manual

PCE-2500N/PCE-2600N Hardness Tester

User Manual

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Last change: 16 May 2018

v1.0

English

 
 © PCE Instruments 
 
 
Contents 
1Safety notes........................................................................................... 1 
2Features ................................................................................................. 2 
3Delivery contents.................................................................................. 2 
4Measuring principle .............................................................................. 2 
5Device description ................................................................................4 
6Technical specifications ...................................................................... 7 
7Operation ............................................................................................... 8 
7.1 Preparation of sample surface.......................................................................................... 8 
7.2 Stabilisation of the sample................................................................................................ 9 
7.3 Prior to first measurement............................................................................................. 9 
7.4 Power on......................................................................................................................... 9 
7.5 Charging......................................................................................................................... 9 
7.6 Measurement..................................................................................................................10 
7.7 Readings displayed.......................................................................................................10 
8Calibration ........................................................................................... 12 
9Battery replacement............................................................................ 12 
10 Additional information........................................................................12 
10.1 Specifications of impact device ...................................................................................12 
10.2 Sample requirements....................................................................................................12 
10.5 Conversion chart HLD/HLDL............................................................................................ 1 
11 Warranty.................................................................................................1 
12 Disposal ................................................................................................. 1 
 

1 Safety notes

Please read this manual carefully and completely before you use the device for the first time. The

device may only be used by qualified personnel and repaired by PCE Instruments personnel.

Damage or injuries caused by non-observance of the manual are excluded from our liability and

not covered by our warranty.

•The device must only be used as described in this instruction manual. If used otherwise,

this can cause dangerous situations for the user and damage to the meter.

•The instrument may only be used if the environmental conditions (temperature, relative

humidity, …) are within the ranges stated in the technical specifications. Do not expose

the device to extreme temperatures, direct sunlight, extreme humidity or moisture.

•Do not expose the device to shocks or strong vibrations.

•Avoid dust, strong magnetic fields, oil, etc.

•The case should only be opened by qualified PCE Instruments personnel.

•Never use the instrument when your hands are wet.

•You must not make any technical changes to the device.

•The appliance should only be cleaned with a damp cloth. Use only pH-neutral cleaner,

no abrasives or solvents.

•The device must only be used with accessories from PCE Instruments or equivalent.

•Before each use, inspect the case for visible damage. If any damage is visible, do not

use the device.

•Do not use the instrument in explosive atmospheres.

•The measurement range as stated in the specifications must not be exceeded under

any circumstances.

•Non-observance of the safety notes can cause damage to the device and injuries to

the user.

We do not assume liability for printing errors or any other mistakes in this manual.

We expressly point to our general guarantee terms which can be found in our general terms of

business.

If you have any questions please contact PCE Instruments. The contact details can be found at

the end of this manual.

2 Features

•128*64 OLED display;

•Micro USB storage device can be connected directly;

•Memory for 600 average values and 6 files;

•Limit alarm;

•Auto Power Off when battery is low;

•Easy-to-read display, clear digits

•Rechargeable Li-Ion battery

•Applications: ball bearings and other parts, fault analysis of pressure vessels, steam

turbine generators and plants, heavy workpieces, mechanical and permanently

installed parts, limited space

3 Delivery contents

1 x hardness tester PCE-2500N or PCE-2600N

1 x charging cable

1 x test block

1 x cleaning brush

1 x user manual

1 x carrying case

4 Measuring principle

The LEEB method of measurement was first used in 1978. It is defined as the quotient of the

rebound velocity of an impact body over its impact velocity, multiplied by 1000. The harder a

material surface, the higher the rebound velocity will be. The Leeb hardness value represents the

direct relation of a group of materials (e. g. steel, aluminium) to its hardness properties.

For the most common metals, conversion charts are available. These enable the user to convert

HL hardness values into other standard hardness units (HB, HV, HRC, etc.).

An impact body with a spherical measuring tip made of tungsten carbide is accelerated towards

the test surface and then rebounds. The impact and rebound velocities are measured at a

distance of 1 mm from the test surface, using the following method: a permanent magnet in the

impact body induces an electrical current into the coil when passing through the coil in the coil

holder. This electrical current is proportional to the velocities of themagnet. Leeb hardness values

can be calculated by using the following formula:

HL = 1000 x (VB / VA)

HL : Hardness according to Leeb

VB : Rebound velocity

VA : Impact velocity

The voltage curve of the output signal when the impact body passes through the induction coil is

shown in the following figure:

If you measure the hardness of a material with the conventional static test method, the pressure

you apply will affect the reading, e. g. 720 HLD ≠ 720 HLC. Since different impact devices

correlate with different conversion charts when converting Leeb hardness values into other

hardness units, the impact device used should be indicated in addition to the converted value.

5 Device description

PCE-2500N

1. Display

2. Keypad

3. Loading tube

4. D-type impact body (within guide tube)

5. Micro USB charging socket

6. Support ring

PCE-2600N

1. Display

2. Loading tube

3. Keypad

4. DL-type impact body (within guide tube)

5. Micro USB charging socket

Display

After switching on the device, it will show the main screen:

HL: Hardness scale

AVE: Average value

: Impact direction

Difference between PCE-2500N and PCE-2600N

•PCE-2500N has a D probe for even surfaces

•PCE-2600N has a DL probe for uneven, small surfaces

PCE-2500N

PCE-2600N

Keys

-On/Off

-Up

-Menu/Confirm

-Down

6 Technical specifications

Hardness scales

HL, HV, HRA, HRC, HRB, HB, HV, HS

Measurement ranges

170 … 960 HLD

17.9 … 69.5 HRC

19 … 683 HB

80 … 1042 HV

30.6 … 102.6 HS

59.1 … 88 HRA

13.5 … 101.7 HRB

Testable materials

Steel and cast steel, alloyed tool steel,

stainless steel, grey cast iron, spheroidal

graphite iron, cast aluminium, copper-zinc

alloy (brass), copper-tin alloy, copper

(bronze)

Accuracy

HLD: ±0.5% (800 HLD)

Repeatability

HLD: 0.8% (800 HLD)

Resolution

128 x 64 OLED display

Operating time

Approx. 10 h

Operating conditions

Temperature: 10 ~ 50 °C

Humidity max. 90 °C

Storage conditions

Temperature: -30 ~ 60 °C

Humidity max. 90 °C

Power supply

Rechargeable lithium battery

Dimensions

PCE-2500N: 148 x 32 x 25 mm

PCE-2600N: 205 x 32 x 25 mm

Weight

PCE-2500N: 64 g

PCE-2600N: 80 g

7 Operation

Before using the device, read the information on calibration and about the factors that have an

effect on the measuring accuracy.

7.1 Preparation of sample surface

When preparing the sample, it is essential to observe the information given in the charts at the

end of this manual.

•When preparing the sample surface, bear in mind that heat, cold, etc. affect the

hardness of the surface to be tested.

•An excessively rough test surface can cause measurement errors. Therefore, the test

surface should have a metallic gloss and be even and free from grease.

•Surface: The test surface should be as smooth as possible. When the radius of

curvature R of the surface is smaller than 20 mm, a small support ring or another ring-

shaped fixing aid should be used.

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