Sample Calibration Procedure

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LABORATORY FOR PRODUCTION MEASUREMENT
Faculty of Mechanical Engineering
Smetanova 17, 2000 Maribor, Slovenia

SOP 6
CALIBRATION OF VERNIER CALLIPER
GAUGES

Issue date

11.7.2003

Issue No.

E-1

Approved by

Bojan Ačko, Ph.D.

Changes made
AMENDMENT

REMOVED

No.

Section

Date

ADDED
Page

Issue No.

Section

Present issue E-1 is equal to the issue No. 3 dated September 1998

Page

Issue No.

CONTENTS
1
1.1

INTRODUCTION
General aspects

4
4

2

MEASURING EQUIPMENT

4

3

RECEIPT

4

4

CLEANING

4

5

THERMAL STABILISATION

4

6
6.1
6.2
6.3

CALIBRATION
Visual inspection
Functional check
Measurement of deviations

5
5
5
5

7

EVALUATION OF MEASURING RESULTS

7

8

DOCUMENTATION

7

9

PROTECTION

7

10
10.1
10.2
10.3
10.4

UNCERTAINTY
7
Mathematical model of the measurement
7
Standard uncertainties of the estimations of the input values and combined standard uncertainty of measurement
8
Calculation of the combined uncertainty
10
Expanded uncertainty
11

11

TRACEABILITY

12

12

LITERATURE

12

Page No.: 4 of 12
LABORATORY FOR
PRODUCTION MEASUREMENT

1

SOP 6 - CALIBRATION OF VERNIER
CALLIPER GAUGES

Issue No.

E-1

INTRODUCTION
This procedure describes the steps taken when calibrating vernier calliper gauges of any dimension using the DIN 862 standard.

1.1

General aspects
Vernier calliper gauges are used to measure distances of either inside or outside measures or depths. Gauge blocks are used to calibrate the vernier calliper gauge.

2

MEASURING EQUIPMENT
Gauge blocks
Coordinate measuring machine

- ZEISS UMC 850

Gauge ring 50 mm

3

- ZEISS, 103 blocks
- MITUTOYO

RECEIPT
The vernier calliper gauge is received from the customer and is visually checked for any obvious defects. Defects which are checked are corrosion; missing or worn parts of the scale (on classical scales);

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