Page 196 - TesaKatalogen

L e ng t h a nd Ang l e S t a nd a r ds

Which Grade Do You Need?
Grade 2
These gauge blocks are commonly used as Working Standards in inspection rooms within a manu-
facturing area to set and calibrate measuring instruments and other equipment as well as to inspect
tools, fixtures and machines.
Grade 1
Gauge blocks of this class are mainly used as Working Standards to set and calibrate plug gauges and
measuring instruments in measuring rooms or inspection areas within a manufacturing area.
Tolerence Grade 0
These gauge blocks are designated for use as Company Standards in calibration laboratories or
environmentally controlled inspection rooms to set and calibrate plug gauges as well as measuring
equipment.
Calibration grade K
Gauge blocks of this tolerance class are intended for use as Reference Standards in metrology
oriented laboratories of National Institutes, precision measuring rooms and other laboratories of Na-
tional Calibration Services, whether officially accredited or not.
They should be used as masters to calibrate gauge blocks, length standards of same accuracy and also
measuring instruments.
Precision Grade 00
The new standard ISO 3650 no longer takes this accuracy grade into consideration as the uncertainties
of measurement achieved with the procedure applied for calibration usually lead to a disparity against
specified tolerances.
The rules to the expression of uncertainty of measurement for proving the conformity or nonconformity
of the product with the specification, as stated in the standard ISO 14253- 1:1998, have dictated the
decision to withdraw the accuracy grade 00.
A wide experience in practical use of gauge blocks has proven that gauges of the calibration class K
could easily replace those of the earlier accuracy grade 00.
As a result, gauge blocks of grade 00 are no longer available.

Certificate of Calibration and Traceability.
All set compositions from TESA are supplied with a certificate of calibration issued by the accredited
calibration laboratory of a national calibration service.
This service can either be the Swiss calibration service (SCS), British calibration service (UKAS) or
Deutsche Akkreditierungsstelle (DAkkS) depending on the manufacturer.
Accreditation is the authenticated assurance of the skills of the calibration laboratories as well as of
the full traceability to national standards that conform with the International System of Units (SI).
This is for any reference standard or measuring equipment being used.
Owing to a multilateral agreement (MLA), any certificates of calibration issued by the members of the
European Cooperation for Accreditation of Laboratories (EA) is internationally accepted.

Deliveries
TESA gauge blocks can be delivered individually or in full sets with nominal lengths as listed in this
section. Additional gauge sets and lengths can be made available upon request. Since individual gauge
blocks could no be listed in their whole here, any inquiry or purchase order should specify :
–– Desired nominal length
–– Chosen material
–– Calibration grade or any other grade

K-3