Vernier caliper calibration in laboratory

Vernier Calipers Calibration

Vernier calipers are essential precision instruments used for measuring internal and external dimensions, as well as depths, with high accuracy.

Accurate vernier calipers are vital for precise measurements in manufacturing, engineering, and quality control processes. Calibration helps prevent measurement errors, supporting overall quality assurance efforts.

Rhopoint Metrology offers ISO 17025 certified calibration for vernier calipers, thereby ensuring precision, compliance, and peace of mind, supporting your commitment to quality and operational excellence.

Our services are available onsite or at our laboratories based in Birmingham and Bristol.

Enquire now for pricing.

Vernier Calipers Calibration Services

Vernier Calipers

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UKAS Calibration for Vernier Gauges (Inc Digital & Dial ) – Calipers – 150 mm (6″)UKAS
UKAS Calibration for Vernier Gauges (Inc Digital & Dial ) – Calipers – 200 mm (8″)UKAS
UKAS Calibration for Vernier Gauges (Inc Digital & Dial ) – Calipers – 300 mm (12″)UKAS
UKAS Calibration for Vernier Gauges (Inc Digital & Dial ) – Calipers – 450 mm (18″)UKAS
UKAS Calibration for Vernier Gauges (Inc Digital & Dial ) – Calipers – 600 mm (24″)UKAS
UKAS Calibration for Vernier Gauges (Inc Digital & Dial ) – Calipers – 900 mm (36″)UKAS
UKAS Calibration for Vernier Gauges (Inc Digital & Dial ) – Calipers – 1000 mm (40″)UKAS
Traceable Calibration for Vernier Gauges (Inc Digital & Dial ) – Calipers – 1200 mm (48″)Traceable
Traceable Calibration for Vernier Gauges (Inc Digital & Dial ) – Calipers – 1500 mm (60″)Traceable
Traceable Calibration for Vernier Gauges (Inc Digital & Dial ) – Calipers – 1800 mm (72″)Traceable
UKAS Calibration for Digimatic Scale & Digital ReadoutUKAS
Traceable Calibration for Vernier Gauges (Inc Digital & Dial ) – Calipers – 2400 mm (96″)Traceable

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Vernier Calipers

British Standard Reference : BS 887 : 2008

How do I use Vernier Caliper Gauges?

  1. Select the caliper that best suits your requirement. Ensure that the type, measuring range, graduations and other specifications of the caliper are appropriate to your application
  2. Never apply excessive force to the slider or the locking screws, should you be unfortunate and drop a caliper gauge, do not use until the caliper has been re-calibrated/repaired by an appropriate repair agent
  3. Be careful not to damage the measuring jaws and always examine both the internal and external measuring jaws for damage prior to use
  4. After use, clean the caliper with a lint free paper or cloth
  5. Check the slider movements for smoothness of travel. There should be no free play or intermittent restriction of movement. Report all non conformances to an appropriate authority
  6. When taking external measurements, position the workpiece as deep inside the measuring jaws as possible
  7. When taking internal measurements, position the measuring jaws as deep inside the workpiece as possible
  8. Avoid parallax errors by reading the scale directly from the front and squarely on
  9. Care should be taken with the measurement of small diameter holes, as these are somewhat smaller than the actual diameter indicated (see appendix 1)
  10. When storing calipers for long periods of time, or when it needs oil, use a lint free paper or cloth dampened with a rust preventative oil and lightly wipe each section, ensure that the oil is spread evenly over the surfaces
  11. Always leave the measuring faces separated and when not in use, always place caliper in its case
  12. Never leave or store the caliper for long periods of time in a high humidity environment
  13. Never use a caliper that has not been calibrated, if in doubt consult an appropriate authority.

It is necessary that any person carrying out such calibration work should have received appropriateย training and have shown the ability to be confident via a suitable training authority. Training recordsย should be held and maintained.

Vernier Calipers

Vernier Calipers BS 887 : 2008

This standard covers vernier gauges with external and internal contact faces from 0 – 48″/0 -1000mm. Metric calipers measure lengths up to a maximum of 1000mm using a main scale and vernier scale graduated to read to 0.02mm. Imperial calipers measure lengths up to a maximum of 48″ using a main scale and vernier scale graduated to read to 0.001″. It may be uneconomical for any company or institution to invest in equipment to the level required in order to calibrate vernier calipers fully in accordance with the standard.

It is highly recommended that an appropriate authority such as a UKAS approved laboratory carries out a full calibration on vernier calipers at least once a year. In between UKAS calibrations at a frequency based on usage vernier gauges should be calibrated in-house. A typical in-house calibration would include a written procedure and an associated calibration record sheet which would contain as a minimum the following listed information:

(a) Serial number

(b) Location

(c) Procedure number

(d) The flatness of external measuring jaws

(e) The parallelism of external measuring jaws

(f) The parallelism of internal measuring jaws

(g) Linearity of the measuring scale

(h) Results

(i) Measurement uncertainty

(j) Sentence if appropriate

(k) Date and calibrators signature

(l) Traceability to National Standards

It is necessary that any person carrying out such calibration work should have received appropriate training and have shown the ability to be confident via a suitable training authority. Training records should be held and maintained.

The following is a layout for a typical in-house calibration for a 0 – 150mm vernier caliper.

Calibration to be carried out in accordance with in-house procedure number …………………..

Information includes:

Serial Number: Make:

Calibration Date: Range:

FEATURE EXAMINEDSPEC (METRIC)SPEC (IMPERIAL)MEASURED RESULTS (METRIC)MEASURED RESULTS (IMPERIAL)
Zero reading as receivedย ย ย ย 
Parallelism of internal measuring jawsย ย ย ย 
Flatness of external measuring jawsย ย ย ย 
Parallelism of external measuring jawsย ย ย ย 
Combination width of measuring jawsย ย ย ย 
Accuracy of readingsย ย ย ย 

The vernier caliper was mechanically and visually inspected for mechanical performance, damage, wear and missing parts and the following faults were noted:

UKAS certification would also detail a measurement uncertainty in accordance with the schedule.

Calibrators Signature: ………………………………….

A traceability statement in this section would be required for all items and their relevant certification utilised for the calibration of the vernier caliper.

Example Certificate

Below is a layout for a typical in-house calibration for a vernier caliper gauge.

Rhopoint Metrology sample calibration certificate for vernier caliper page 1 of 3
Rhopoint Metrology sample calibration certificate for vernier caliper page 2 of 3
Rhopoint Metrology sample calibration certificate for vernier caliper page 3 of 3

UKAS Calibration

All of our Laboratories are accredited to provide UKAS & Traceable calibrations to all the relevant standards giving you peace of mind.

Benefits of Calibration

Accurate & Reliable

Make consistent, accurate and reliable measurements

Increase Product Life

Ensure longevity of the measuring instruments

Safety and Reliability

Ensure safety in critical applications such as medical and aerospace