HP-2.5
Yarn Package Hardness Tester

Textile hardness tester (durometer) to determine winding density of closely wound bobbins of synthetic, finished fibers and filaments

Indentor – ball diameter 2.5 mm
The measuring force is according to shore A regulations

Durometer with curved working face for bobbins with diameter up to 400 mm

Special Features

  • The spring loaded outer ring assures a constant measuring pressure and eliminates false readings due to difference between operators
  • Ball shaped indentor prevents damage to bobbins
  • Working face slightly curved to fit on small bobbins, working face radius 55 mm
  • Adjustable Min./Max. indicator marks to highlight working range of the yarn package hardness tester HP-2.5
  • For bobbins with diameters over 400 mm use yarn package hardness tester HP-2.5-F with flat working face e.g warping beams
  • Optionally available: Calibration certificate with calibration report

Standard Features

  • High repeatability
  • Easy to use
  • Display range 0 – 100 hardness graduation marks
  • Certificate of Compliance with the order 2.1 according EN 10204 is included

 Available Models

Model Ball Ø Application
HP-2.5 2.5 mm for closely wound bobbins of synthetic, finished fibers and filaments
 alternative
HP-5 5 mm for loosely wound bobbins of synthetic fibers and closely wound natural fibers, yarns and threads
HP-10 10 mm for very loosely wound bobbins of thick yarns, such as carpet yarns

SPECIFICATIONS

Indentor: Ball Ø 2.5 mm
Area of application: For closely wound bobbins of synthetic, finished fibers and filaments
Depth of indentation*: 0 – 2.5 mm
Test pressure**: Approx. 12.5 N
Measuring spring force*: 0.55 – 8.065 N
Display range: 0 – 100 hardness graduation marks
Scale diameter: 54 mm
Working face radius: 55 mm
Weight, net (gross): Approx. 300 g (500 g)
Dimensions: 50 x 58 x 110 mm (LxWxH)

Specifications subject to change without notice!

* Meets requirements of Shore A
** Spring load of outer ring to create constant pressure when outer ring is pulled to red marking

OPERATION

For measuring the hardness, the spring-loaded outer ring of the housing is pressed downwards until the edge of the ring meets the red marking on the housing. This ensures a constant pressure and prevents measuring errors.

General:

The principle used to measure textile hardness is based on measuring the resistance force of the penetration of a ball shaped indentor against the spool under a known spring load. The hardness scale covers a range of 0 – 100, were 0 is the smallest and 100 is biggest hardness. The measuring force and the principle relates to the specifications of rubber hardness tester Shore A.

 Please note:
There exists no international standard for adjusting and calibration of textile hardness. Therefore we have developed our own test-standard and procedures.

ATTACHMENTS AND ACCESSORIES

Code M – Memory pointer

Memory pointer to capture and store value (last or highest reading) during measuring.
Order code: HP-2.5-M

 

 

 

 

 

 

 PSHP – Test Stand

Model PSHP for series measurements
– Spring loaded lever for fast, precise positioning
– Height adjustable 0 – 200 mm
– Stroke lever action 40 mm
– Dimensions 162 x 100 x 320 mm (LxWxH)
– Weight net: approx. 2,3 kg
Various plates are optional available,
ask for more information !

 

 

 

 

 HP-PT – Test Block

The test plate is used for testers with a curved surface. It can be tested, if the measuring pointer does a 360° turnaround conforming to an defined penetration.
Test method:
Place the tester on the block. Press down the instrument with its housing ( do not use spring – loaded outer shell). The pointer has to do a full turnaround from zero to zero marking. If the result of the verification is positive, the durometer should show correct readings over the complete range.

Order number: HP-PT from serial-number 310-5801

 

 

 

 

HP-P – Test Block

The test plate is used for testers with a curved surface. It can be tested, if the measuring pointer does a 360° turnaround conforming to an defined penetration.
Test method:
Place the tester on the block. Press down the instrument with its housing ( do not use spring – loaded outer shell). The pointer has to do a full turnaround from zero to zero marking. If the result of the verification is positive, the durometer should show correct readings over the complete range.

Order number: HP-P up to serial-number 310-5800

DELIVERY INCLUDES

Yarn package hardness tester HP-2.5 with carrying case, Certificate of Compliance with the order 2.1 according EN 10204 free of charge, operating instructions in English or German as requested.

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