1. ปฏิบัติการสอบเทียบเครื่องมือ 1 MQS 3304
- สอบเทียบ มวล (Weight Calibration) according to OIML R 111-1:E (2004)
1) Correct Data in worksheet
2) Calculation of Conventional Mass
3) Estimation of Uncertainty of Measurements
4) Issue the Certificate of Calibration
5) Write Down the Calibration Procedure (CP)
6) Group Presentation
7) Create the Quality Manual (QM)
ding

2. ปฏิบัติการสอบเทียบเครื่องมือ 1 MQS 3304
Mass Laboratory

3. Pt-Ir No. 80

4. The technical transfer for large weight (up to 1000 kg)
Standard weights, shape – disc weights
50 kg, 100 kg, 200 kg, 500 kg and 1000 kg
The technical transfer for large weight (up to 1000 kg)
was support by expert from NMIJ, Japan.

5. The importance of calibration
Corresponding to a standard of measurement
Due to the change of scales and weights.
To be able confirm the accuracy of the measurements.
-Know the limits tolerances of the measurement results or not.
- A few percent certainty that the measurement results. The tolerances in scope.
- There is a reference or not.
- Confirm it possible that the accurate suitable for work
The Preparation of quality system

6. Weights

7. Standard of measurement of mass.
OIML (International Organization of Legal Metrology)
OIML R111 divided by weight into Class E1, E2, F1, F2, M1, M2, M3.
By technical specifications of the weights.
Shape
Material
Magnetism
Surface condition
The error of weights (Error).

8. (Material) Stainless Steel Class E1 • Brass Class F1 Recommend F2
Class M1
Recommend M2

9. With adjustment

10. Sheet and wire

11. The selection of weights to suit the work.
From the ISO 10012, we have to choose Tum weight Not more than the tolerances. 1 in 10 of tolerance, but tolerance is deferred to. Up to a maximum of 1 in 3.
For example, if we want to calibrate weights 100 g by the coordinates.
Error does not exceed ± 0.15 mg, so the weight of the calibration standard.
To deviate by no more than 1/3 of 0.15 mg, equivalent to 0.05 mg.

12. Class of calibration

13. Attendance
Do not touch the weights with bare hands.

14. Attendance Cleaned using a soft brush dusting particles.
Keep weights In clean area environment and a constant

15. Attendance
Do not place the weights on the floor directly or place the weights stacked

16. Attendance
Keep weights knocked crash or dragging to the weighing pan.

17. Force Laboratory By
Force Laboratory, Department of Mechanical Metrology
National Institute of Metrology (Thailand)

18. Deadweight Force Standard Machine
Expanded relative uncertainty = 20 ppm

19. Deadweight Force Standard Machine
Expanded relative uncertainty = 20 ppm

20. Hardness Laboratory

21. Hardness Standards Hardness Laboratory Rockwell Hardness scale C
Vickers Hardness
(200 HV – 900 HV)
At 0.01 kgf – 50 kgf
Brinell Hardness
Rebound Hardness (Shore hardness)
Elastomer Hardness (Shore IRHD)

22. The First Machine of Hardness Laboratory at NIMT
NIMT Hardness Machines
The First Machine of Hardness Laboratory at NIMT
Standard Rockwell Hardness Machine (SHT-31) was donated from Akashi Corporation

23. Primary Vickers Hardness Machine
NIMT Hardness Machines
Primary Vickers Hardness Machine
Test force : 10 kgf to 50 kgf

24. Reference Standards Rockwell Calibration System (CSR 150)
Force Measurement
Depth Measurement
Testing Cycle Measurement