News: General News
27th October 2016
Explore New Dimensions at the National Space Centre: Spectrum Metrology will be hosting an Open Day this June in conjunction with Taylor Hobson and FARO. Register now ...
12th March 2019 • Read »
We are pleased to announce that the 4D InSpec XL surface defect gauge has won the 2019 Prism award in Test and Measurement. The award was presented to 4D Technology during the Photonics West 2019 expo by SPIE, the International Society for Optics and Photonics.
20th February 2019 • Read »
Autocollimators were used to align the optical components when the University of Leicester built the pioneering CompAQS scanner in collaboration with Surrey Satellite Technology and DL Optics Ltd
18th October 2018 • Read »
Spectrum Metrology invites visitors to the MACH exhibition to witness the optical clarity and precision of their latest digital projectors and video microscopes, manufactured by German designers Dr Schneider Messtechnik.
6th March 2018 • Read »
Shipbuilders and marine engineers Cammell Laird are using the Micro Alignment Telescope to assist with precise alignment of the ships propeller shafts to the marine engine during build of the Sir David Attenborough polar research vessel
26th January 2018 • Read »
How often should I have my metrology instruments calibrated?
We are often asked how frequently metrology instruments need to calibrated - here are a few guidelines to help you decide ...
Only the end-user can decide the frequency, but your decision should be based on some or all of the following criteria :
1. Does the item have mechanical movements or is it a reference standard ?
Instrument systems (Talyvels, Autocollimators, Telescopes, clinometers, etc) having adjustment knobs and focusing mechanisms etc, may require service/repair/re-calibration more often than a reference standard
2. Whether it is a 'master' or 'working' item
If the item is used on a daily basis, the likelihood of misuse is more prone than if it is a reference standard that may only be used on a monthly or quarterly basis .
3. The frequently with which it is used
The greater the use, the greater the likelihood of damage or wear occurring.
4. The environment in which it is used
An item that is used in volatile, dusty, or workshop environments may demand a shorter re-calibration frequency than that of an item that is used in a laboratory or standards room.
5. The experience of, and care taken by staff using the item, and the classification of the items use
Will it be used by trained personnel only, or is it a ‘common access’ item?
6. The nature and accuracy of the work undertaken using the item
Higher accuracy measurements with smaller uncertainties can influence the frequency at which the item is re-calibrated .
7. Whether there are ISO or other International audit requirements
Some auditors may impose a new calibration if it is their considered opinion that the original certificate is now ‘out of date.
Generally we find that most users of the Taylor Hobson autocollimators, telescopes and precision levels need to send their instruments for maintenance and calibration every 1-2 years.
Spectrum Metrology is the authorised agent to Taylor Hobson for the service and repair of their electro optical metrology products (autocollimators, alignment telescopes, precision levels and clinometers) and uses the services of the Taylor Hobson UKAS calibration laboratory for traceable certificates of calibration. Contact us today with details of your instrument.