News: General News
27th October 2016
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 »
Taylor Hobson will launch its automatic prism/polygon measurement system at the forthcoming Photonics West exhibition in San Francisco this month.
15th January 2018 • Read »
Spectrum Metrology will be showcasing a range of ground-breaking handheld gauging technology for rapid micro-defect and gap/flush analysis at the EPMC show this November (Ricoh Arena, 14-15 November).
12th October 2017 • Read »
Following NIST guidelines, the Brunson KinAiry is a comprehensive field test for all models of laser tracker, allowing fast, regular health checks of your laser tracker in the field.
7th September 2017 • 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.