Digimatic Vernier Calliper
PURPOSE:
To provide the procedure for operation and
calibration of Digimatic Vernier Calliper. This
instrument operating procedure also provides precautions to be taken and
preliminary checks to be performed during operation.
SCOPE:
Applicable to MITUTOYO Digimatic Vernier
Calliper of Quality Control department.
DEFINITIONS:
IOP:
Instrument operating procedure
RESPONSIBILITY:
Quality Control Chemists is responsible for
the implementation of this Instrument Operating Procedures.
ACCOUNTABILITY:
Manager Quality control is accountable for implementation and
compliance of this Instrument Operating procedure.
PROCEDURE:
1.0 PRELIMINARY CHECK:
1.1 Ensure that the system is clean and free from dust.
If not clean with a soft duster
2.0 BASIC OPERATION:
2.1 Set
the jaws together without leaving any space between both the jaws.
2.2 Switch
on the Calliper and wait for 10 – 15 seconds.
2.3 Ensure that the reading on display is zero.
2.4 Set the unit of measurement in mm / inch using the
button provided on the Calliper.
2.5 Using screws provided in the bottom of the Calliper
to hold sample / material to be tested between the jaws and note down the
reading in Test Data Sheet / Protocol.
2.6 After the analysis switch “OFF” the Calliper.
3.0 PRECAUTIONS:
3.1 Let the
Calliper be idle for few seconds after the switching it “ON”, as the Calliper
requires start-up time to stabilize.
3.2 Ensure that no scratches on the screen /
scale.
3.3 Apply nominal force while handling the
Calliper.
3.4 Ensure that Calliper is placed back in the box
after use.
CALIBRATION PROTOCOL:
Calibration
Frequency: Monthly
Calibrate
the Calliper by using the following standard thickness gauges i.e. 0.10, 0.20,
0.25, 0.30, 0.40, 0.50, 0.60, 0.70, 0.80, 0.90 and 1.0mm respectively and note
down the reading in test data sheet.
Acceptance
Criteria: Observed reading should not vary
by more than + 0.02mm
DISTRIBUTION:
Master
Copy : Quality Assurance
Control
Copy : 10 : Quality control