An Overview

Producing Quality products is a major requirement for the manufacturers for survival in the present day competitive market. Accurate measurement plays a crucial role at each stage in development & production of quality product. The effectiveness of quality control steps depends directly on the accuracy and confidence with which the test & measuring instruments (TMI) can yield test results. Thus systematic and periodic checking of Test & measuring Instruments is very essential for reliable measurements. The process of periodic checking of TMI by comparison with another instrument of better accuracy is termed Calibration. Further for worldwide exchange of goods, products & technology and interchangeability of components & parts, it is essential that measurement represent the same quantity everywhere. This is possible only when the measurements have a common reference base, which is internationally accepted. This common reference base is the SI unit of measurement. Standard is the physical realization of the unit of measurement. The process of making sure that our measurement stem from a common reference base is termed Traceability. Periodic calibration of TMI provides the most vital link between international standards of measurement and the day-to-day test & measurement data through the medium of National measurement standards held by the National standards laboratory. Since it is impracticable to cater to the calibration requirement of the entire TMI population by a single laboratory, the support hierarchy for establishing traceability is provided by echelons of calibration laboratories. The laboratories complying to the requirement of ISO/IEC 17025 standard are competent to produce reliable and valid results. Accreditation of the laboratory ensures the compliance to ISO/IEC 17025 standard and hence the competence of the
laboratories.

STQC Calibration Service Network

There are 4 regional laboratories, ten state level laboratories and two High Precision Calibration Centre's. The STQC laboratories are equipped with the state of the art calibrating facilities. These laboratories serve as support hierarchy in establishing traceability to the National Standards through their calibration services to electronic & allied industries for electro technical and non-electrical parameters.

All the laboratories have well-established quality system complying with ISO/IEC 17025 and are accredited/ in the process of accreditation by NABL Owing to the demand of industries the STQC Calibration Services have been diversified to include opto electronic and medical electronics area also. Facilities for calibration of opto electronic instruments are established at ERTL(East), Kolkata, ERTL(W), Mumbai, ETDC, Bangalore and ETDC, Guwahati and for Medical electronics instruments at ERTL Kolkata, Thiruvanthapuram & ETDC Chennai

• Calibration Services covering Electrotechnical, Mechanical, Thermal and Optical Parameters
• Agency capable of providing Mobile & On-site Calibration services.
• High Precision Calibration Centre at Bangalore one more planned at Delhi
• Participation in International & National proficiency testing programmes National & Asia Pacific - Metrology Programme (APMP).
• Active partner of NABL (National Laboratory Accreditation Programme)
• Client base of more than 6000 organizations including MNCs, PSUs, R&D and SMEs.
• Assists in establishing Calibration Laboratory & Systems as per international norms

Service Credentials

The quality system implemented in the laboratory and the technical competence comply to the requirement of the international standard ISO / IEC17025.The laboratories are accredited/in the process of accreditation by the National Accreditation Board for Testing & Calibration Laboratories (NABL). The standards maintained are traceable to national standards and the calibration report issued has wide acceptability and includes measurement uncertainty. The turn around time for calibration of instruments is minimum and the calibration charges are rationalized across the STQC laboratories. The laboratories also cater to the mobile/onsite calibration requirement of customers. The laboratories participate in the Proficiency Testing (PT) programs that is an important requirement of ISO/IEC 17025 Standard, organized by both National and International accreditation bodies and have satisfactory performance. It also serves as a nodal agency/reference laboratory for organizing the PT programs for NABL. In addition self-initiated PT programs, is also organized by the STQC High Precision Laboratories.

Calibration Facilities exists through National Accredited Laborites for

Electrical Parameters (DC, LF, HF & RF)

• Voltage
• R, L, C
• Current
• Frequency
• Power
• Impedance

Non Electrical & Dimensional Parameters

• Mass
• Length
• Pressure
• Force
• Temperature
• Humidity
• Viscosity
• Hardness
• Volume and Density
• Optical Power
• Wavelength
• Luminous Intensity 

Following links will list out the various Calibration Standards available in STQC Network of laboratories and also give profile of spectrum of instruments calibrated using these standards.

• Listing of the State-of-The-Art Calibration Standards available at HPCC Laboratories of STQC (PDF Format)

• Typical Instruments Calibrated at HPCC Laboratories of STQC (PDF Format)

• Listing of the Calibration Standards available at Industrial Calibration Laboratories of STQC (PDF Format)

• Typical Instruments Calibrated at Industrial Calibration Laboratories of STQC (PDF Format)

• Listing of the Non Electrical Calibration Standards available at STQC Laboratories (PDF Format)

• Typical Non Electrical Instruments Calibrated at STQC Laboratories(PDF Format)

Services Offered