SOP on operation and calibration of Thickness Tester
To provide the procedure for operation and calibration of Thickness Tester. This instrument operating procedure also
provides precautions to be taken and preliminary checks to be performed during
Applicable to MITUTOYO Thickness Tester for the thickness testing
of Quality Control department.
Instrument operating procedure
Quality Control Chemists is responsible for
the implementation of this Instrument Operating Procedures.
Manager Quality control is accountable for implementation and
compliance of this Instrument Operating procedure.
1.0 PRELIMINARY CHECK:
1.1 Check and
that the instrument is clean, if not, clean with a soft cloth duster.
Ensure zero on dial. It may be set through adjustable dial and
firm up the dial, using the screw.
Ensure that the platform of
thickness tester is clean.
Lift the lever and place the
sample piece of the Aluminium foil (Approx. 10 x 10 cm) on the platform and
release the lever.
Read the inner dial in mm and
outer dial in µm. Record the reading in
terms of millimeter by dividing the outer dial reading with 1000 and adding
with the inner dial reading and note down in test data sheet.
inner dial shows the needle between 0.2 and 0.4 – Read it as 0.2
The outer dial needle is
at 90 after 100, which means 110.
reading is 0.2 + (110/1000) or 0.2 + 0.110 = 0.310 mm
Calibrate the instrument by using
the following standard thickness gauges i.e. 0.10, 0.20 and 0.40 mm
respectively and note down the readings in test data sheet.
Acceptance Criteria: Observed
reading should not vary by more than + 10µm [0.01mm].
Copy : Quality Assurance
Copy : 10 : Quality control