SCHMIDT,Yarn Package Hardness Tester, HP Series, Yarn Package Hardness Tester HP-2.5,เครื่องทดสอบความแข็งของเส้นด้าย,

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

 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

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.