The care and use of external micrometers to ensure accurate measurements British Standard Reference : BS 870 : 2008 1. Select the micrometer that best suits your requirement. Ensure that the type, measuring range, graduation and other relevant specifications of the micrometer are appropriate for your application. 2. Always use the ratchet or friction thimble in the appropriate manner, never rotate the micrometer thimble violently. 3. Avoid parallax errors by reading the micrometer and vernier scales

The Care and Use of Vernier Caliper Gauges British Standard Reference : BS 887 : 2008 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

The Care and Use Of Vernier Height Gauges British Standard Reference : BS1643 : 2008 1. Select the height gauge that best fits your requirement. Ensure that the type, measuring range, graduation and other specifications of the height gauge are appropriate for your application. 2. Do not apply excessive force to the sliding and locking mechanisms of the height gauge. Should you be unfortunate and drop the height gauge, before reusing have the height gauge recalibration/repaired