In the past it was not required to calibrate your welding equipment
but it was the responsibility of a manufacturer to execute such. So
manufacturers with comprehensive quality requirements or who are
welding critical materials and want to be sure the equipment delivers
the chosen parameters did perform this already for many years. Today
more and more specifications require calibration of equipment on a
annual base, this is not only for actual production but also for WPS
qualification.
For example when your production facility must be approved according
to ISO 3834 (quality assurance of production process) this is one of
the requirements.
As already mentioned by msms you need to ensure parameters shown on
the displays are correct in order to guarantee proper heat input.
Best Regards,
Herman Pieper
On 18 jan, 08:28, prashant pansare <prashantpan...@yahoo.co.in> wrote:
> Dear all,
> Why we need to have calibration certificates of welding machines prior to start of fabrication activity?
> As we can qualify WPS without the same.
> Pl. reply.
> Thanks & Regds,
> PSP
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