Muri,meters & Testing of Calibration.pptx

Calibration

1. CALIBRATION AND TESTING OF VARIOUS TYPES OF EQUIPMENT BY BB NAYAK

2. What is Calibration? 1 . Calibration of an instrument is the process of determining its accuracy. (How Correctly it can measure) 2. Calibration is the process of comparing a device under test of an unknown value with a reference standard of a known value . 3. The process involves obtaining a reading from the instrument and measuring its variation from the reading obtained from a standard instrument. Calibration of an instrument also involves adjusting its precision and accuracy so that its readings come in accordance with the established standard.

3. Why Calibration is Required? 1. Calibration of equipment needs to be carried out on a regular basis. This is because instruments tend to deviate owing to hard operating conditions, mechanical shocks or exposure to extreme temperature or pressure. 2 . Frequency of calibration would depend on the tolerance level. When the objective of the measurement is critical calibration would need to be carried out more frequently and with great accuracy. 3. To assure accuracy in instrument calibration, it is vital to ensure that each component of the measuring instrument is conforming to its specified standard. 4. Regular equipment calibration carried out in a set format helps you obtain valid data and operate in a safe working environment.

4. Different types of Calibration for indicating and measuring equipments 1. Pressure Calibration (Pressure Gauge) 2. Temperature Calibration (Temperature Gauge) 3. Flow Calibration ( Turbine Meters) 4. Pipette Calibration 5. Electrical calibration ( Insulation Testers, Energy Meter, Ammeter, Voltmeter) 6. Mechanical calibration ( Verniers , Height Gauges)

5. ELECTRICAL EQUIPMENT TEST ------------------------------------------------------ A- TYPE TEST B- ROUTINE TEST 1– TRANSFORMER -- SFRA -- TAN DELTA --- VOLTAGE RATIO TEST ---- MAGNETIC BALANCE ___ MAGNETISING CURRENT ----- SHORT CIRCUIT TEST ------ WINDING RESISTANCE ----- IR AND PI ----- .OIL BDV ----- VECTER GROUP ------ TURNS RATIO

6. HT CIRCUIT BREAKER TEST Different Routine Tests 1- Closing and Tripping Time 2 CRM ( Contact resistant Measurement ) Insulation Resistant 4-High Voltage Test 5 – Vaccum Check 6- - Interlock Test.

7. Electrical testing is the process of evaluating an electrical system or component to determine its compliance with safety and performance standards. It’s typically carried out by qualified electricians trained to use specialized equipment to test various aspects of an electrical system.

8. CT TEST 1—IR 2 – Ratio 3-- Resistance 4- Tan- Delta 5- Polarity 6- Knee point

9. Protection Relay. Healthy ness check 1- Different function Like O/C , E/F ,U/V, Diff proction , blocked rotor , Thermal overload . No of starts, REF,