Calibration Point
is a single source for calibration of wide range of Electronic
Instruments traceable to NABL.
We are having complete facility like
precision calibrating sources for direct calibration and source &
calibrating meters for doing calibration by comparison method.
All Our Calibrating Instruments are having Calibration Validity of 1
Year.
Calibration! What is it ?
A set of operations, performed in accordance with a definite
procedure, that compares the measurements performed by an instrument
to those made by a more accurate instrument or a standard for the
purpose of detecting and reporting, or by adjustment, errors met in
the instrument tested.
Purpose of Calibration
To ensure readings from an instrument are consistent with other
instruments and to determine the accuracy of the instrument i.e.
that it can be trusted for its observed / displayed measured value.
The value of calibration for industry
» To ensure that products are manufactured to specifications.
» To demonstrate that the industry operates a quality system
and technically competent and are able to generate
technically valid results.
» To increase quality & value of product.
» The calibrated measuring instruments (working standards) have the
assurance of an unbroken chain of
national/international measuring standards.
What is Traceability ?
Property of the result of a measurement or related to stated
references, usually national or international standards, through an
unbroken chain of comparisons all having stated uncertainties.
Why measurements must be Traceable ?
» Traceable measurements ensure the uniformity of manufactured
goods and industrial processes.
» To support equity in trade as well as compliance to
regulatory laws & standards.
» Essential to the development of technology.
» To provide traceable calibration of test and measurement
equipment is an ISO-9000 requirement (Purpose: With
an eye to provide safety and fitness for use) to ensure that
the products manufactured in one country will be
acceptable in another on the basis of agreed to measurement
standards, methods & practices)
» Provides users with assurance of the confidentiality,
validity and accuracy of the data provided while testing.
Uncertainty- How accurate are your measurements ?
It is a measure of the quality of a measurement & provides the means
to assess & minimize the risks and possible consequences of poor
decision.
(A measurement with a stated uncertainty can be compared to others)
(Measurements are traceable when they can be related to recognised
measurement system through an unbroken chain of comparisons each
with stated uncertainties.)
Calibration Interval-Validity Period.
Validation is usually nominal maximum period between two successive
calibrations. The validity period is generally considered to be
maximum appropriate, provided
» The equipment is of good quality and is of proven adequate
stability.
» If any suspicion or indication of overloading or mishandling
arises, the equipment will be checked immediately and
thereafter at frequent intervals until it can be shown that
stability has not been impaired.
» The extension of validity period is based on factors such as
history of stability, frequency of use, accuracy required, ability
of staff to perform regular checks and successful participation in
proficiency testing programs. It is the responsibility of the
testing authority to provide evidence that its calibration system
ensures that confidence in the equipment can be maintained.
Adequate records of the test data must be maintained over a period
of time to draw support for extension of validity period.
Calibration Measurement! How ?
» Verifying the performance of the test instrument which
involves applying a standard value to the instrument and observing
how it behaves.
» Adjust the response of the instrument, wherever
possible(After verifying response, reset, adjust/correct the
instrument via internal control which in normal course is not
accessible)
» Obtain correction factor for the test
instrument.(Accordingly correction factors/calibration constants are
calculated & incorporated in measurements)
