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TYPE |
PTC MODEL No. |
MAIN SPRING TRAVEL |
INDENTER DESCRIPTION |
INDENTER
IMAGE |
APPLICATIONS |
A
ASTM D2240
JIS K6253
ISO 868 |
201
211
306L
408
501A
511A |
821 gf
1.81 LB
0.100 inch
travel |
Truncated Cone
35° Included Angle |
 |
Soft rubber, elastomers, neoprene,
silicone, vinyl, nitrile, and butyl,
soft plastics, felt, leather,
waxes, printing rollers
and similar materials |
B
ASTM D2240 |
|
821 gf
1.81 LB
0.100 inch travel |
Conical
30° Included Angle |
 |
Rubber, elastomers,
use when off the high
end of the A scale |
C
ASTM D2240
|
202C
212C
307CL
409C
502C
512C |
4.53 kgf
10 LB
0.100
inch travel |
Truncated Cone
35° Included Angle |
|
Medium hard
rubber or plastics
use when off the
low end of the D scale |
D
ASTM D2240
JIS K6253
ISO 868 |
202
212
307L
409
502D
512D |
4.53 kgf
10 LB
0.100 inch travel |
Conical
30° Included Angle |
|
Hard rubber, plastics, acrylic,
delrin, kevlar, pvc, nylon,
lexan, epoxies and similar materials |
DO
ASTM D2240 |
202DO
212DO
413
502DO
512DO |
4.53 kgf
10 LB
0.100 inch travel |
3/32" Spherical
Diameter
(2.38mm) |
 |
Dense textile
winding, medium
printing rollers |
E
ASTM D2240 |
408E
501E
511E |
821gf,
1.81 lbs
0.100 inch travel |
0.200" Spherical
Diameter
(5.08mm) |
 |
Medium density
textile windings,
soft rubber,
foamed
elastomers,wound
threads,yarn |
O
ASTM D2240 |
201/O
211/O
410
501/O
511/O |
821gf,
1.81 lbs
0.100 inch travel |
3/32" Spherical
Diameter
(2.38mm) |
|
Soft printing rollers,
textile windings |
OO
ASTM D2240 |
|
113gf,
4.0 oz.
0.100 inch travel |
3/32" Spherical
Diameter
(2.38mm) |
|
Sponge rubber,
very soft rubber |
OOO
ASTM D2240 |
412
412L |
113gf,
4.0 oz.
0.100 inch travel |
1/2" Spherical
Diameter
(12.7mm) |
 |
Very soft materials, (e.g.) open cell foam |
SL
FOAM RUBBER
PTC STANDARD |
|
142gf,
5.0 oz.
0.200 inch travel |
1 cm2- Circular
(0.155in2) |
 |
Foam and sponge rubber,
cellular and gel-like material |
CF
ASTM F1957-99 |
414CF |
9.11kgf
20lbs
0.200 inch travel |
.1/2" Spherical
Diameter
(12.7mm) |
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Composite Foam |
Asker C
SRIS-0101
JIS K7312 |
601
603
604
611 |
855gf,
1.89 lbs
0.100 inch travel |
0.200" Spherical
Diameter
(5.08mm) |
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Medium density
textile windings, soft rubber,
foamed elastomers,
wound threads, yarn |
Calibration and Certification
Calibration is the set of operations that establish, under specified conditions, the relationship between the values
of quantities indicated by a measuring instrument and the corresponding values realized by standards. International Vocabulary
of Metrology (VIM) The result of a calibration permits either the assignment of values of measurands to the indications or
the determination of corrections with respect to indications.
The result of a calibration may be recorded in a document, sometimes called a calibration certificate or
a calibration report. A measuring instrument can be calibrated by comparison with a known standard. An adjustment of the instrument is often carried out after calibration in order that it
provides given indications corresponding to given values of the quantity measured.
PTC Metrology™ is Accredited by A2LA to
ISO/IEC 17025 and ANSI/NCSL Z540-1 for durometer calibration.
NIST traceable certification is available for any durometer type covered by current ASTM D2440, ASTM F1957, ISO 868, ISO 7619, or DIN 53505 standards. The Calibration Report includes both "as received" and "as left" data on the force curve measurement. Durometer calibration includes: indenter geometry and extension, indicator linearity from 0 to 100, and mainspring force. Other durometer types, custom models, and durometers of any manufacture can also be certified by PTC Metrology™.
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Metrology the science of measurement and its application
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