Checkline HP-Textile-Durometer - Manual (Page 3)

2.0 O PERATING P ROCEDURES
1. Place the instrument on the material
to be tested. The durometer must be
level, and the sensing pin must be
perpendicular to the material to be
tested.
Any angle other than perpendicular
(90°) mauy cause errors
2. Holding the knurled, spring-loaded
outer shell between fingers, press
downwards until the lower edge of
the shell meets the red line marked
on the housing. This ensures that
sufficient pressure is applied as
specified in the standard. It also
ensures that the same amount of
pressure is applied from measurment
to measurement, and when the
durometer is used by different
operators.
3. Record reading after approximately
2–3 seconds. Release pressure on
the outer shell and remove the
durometer from the test material.
2.1 Memory Pointer (optional)
The Memory Pointer moves with the
measurement pointer when a measure-
ment is taken. However, when pressure
on the outer shell is released, and the
measurement pointer returns to zero, the
Memory Pointer remains in position,
marking the last measurement.
To return the Memory Pointer to the
zero position prior to taking another
measurement, rotate the knurled knob
on the face of the instument counter-
clockwise until the pointer has been
reset. See figure at right.
Textile Durometer
Shore Durometer
Scale
Spring-Loaded
Outer Ring
Spring-Loaded
Outer Ring
Color Marking
Color Marking
Scale
-3- -6-
Model Indentor Decriptions Typical Applications
HPSA Truncated Cone Soft rubber, elastomers, natural rubber products, etc.
35° Included Angle
HPSB Conical Rubber, elastomers, use when off the high end of the
35° Included Angle “A” scale
HPSC Truncated Cone Medium hard rubber or plastics, use when off the low
35° Included Angle end of the “D” scale
HPSD Tapered pin 30° Hard rubber, rigid thermoplastic products
HPSO U-grooved 3/32 in. Soft elastomers, textile fabrics
HPDO Spherical 3/32 in. Dense textile winding, medium printing rollers
Model Sensor Ball Bottom Typical
Diameter Surface Applications
HP-2.5 2.5 Ball Closely wound bobbins of synthetic fibers
HP-5 5 Ball Loosely wound bobbins of synthetic fibers
and closely wound natural fibers, yarns and threads
HP-10 10 Ball Very loosely wound bobbins of thick yarns,m such as
carpet yarns
HP-2.5F 2.5 Flat Same as Model HP-2.5 with a flat working face for
measuring warp beams, or for bobbin diameters with
over 400mm
HP-5F 5 Flat Same as Model HP-5 with a flat working face for
measuring warp beams, or for bobbin diameters with
over 400mm
HP-10F 10 Flat Same as Model HP-10 with a flat working face for
measuring warp beams, or for bobbin diameters with
over 400mm
4.0 A VAILABLE M ODELS
Shore Durometers
Textile Durometers
Memory
Pointer