Different Types of Calibration

If you work as a technician or engineer in the vibration and measurement sector, you are probably well-versed in calibration and the equipment that needs to be calibrated on a regular basis. Calibration is critical anywhere measurements are significant because it allows users and organisations to have trust in the findings they monitor and record.

But let’s see first what calibration actually means?

Calibration is defined as the process of comparing an unknown value device under test (DUT) with a known value reference standard.

In its most basic form, calibration is the process of determining an instrument's accuracy.

Calibration of measurement equipment can be done on a variety of instruments in a variety of industries.

Let's have a look at some of the most common calibration procedures:

1. Pressure Calibration

Pressure calibration is a critical function in a variety of industries where measurement equipment is required to monitor process performance and safety, with gas and hydraulic pressure being the most common measurements.

Many businesses are now certified to quality standards such as ISO9000. There are a variety of quality procedures that must be followed in order to maintain quality standards, and because many industrial processes rely on pressure measurement, pressure calibration is a crucial aspect of a company's quality assurance.

Pressure calibration is carried out using a variety of pressure balances and calibrators, as well as high-accuracy pressure sensors and pressure gauges.

The following are some examples of pressure devices that are calibrated on a regular basis:

• Pressure gauges that are digital

• Indicators for the Digital Age

• Transducers

• Transmitters

• Pressure Gauges with Analogue Readings

• Barometers

• Gauges for testing

2. Temperature Calibration

Temperature calibration is undertaken and carried out in a controlled setting in all processes where temperature readings play a key role.

Thermistors, thermocouples, or Platinum resistance thermometers (PRTs), sometimes known as resistance temperature devices (RTDs), are commonly employed in temperature calibration.

It's important to remember that measuring the temperature from a temperature sensor using an RTD or thermocouple indicator and then comparing the readings to the in-line field indicator is not a temperature calibration. A temperature calibration can only be done by comparing the probe being tested to a recognised reference in a steady temperature environment.

The following are some examples of equipment that need temperature calibration on a regular basis:

• Data Acquisition Systems

• Thermometers/Thermocouples

• Dial Thermometers

• Chambers/Furnaces

• Infrared Meters

• PRTs and Thermistors

• Thermal Cameras

3. Electrical calibration

Electrical calibration is the process of ensuring that any instrument that measures or tests electrical properties such as voltage, current, resistance, inductance, capacitance, time, and frequency is operating properly.

Electrical calibration necessitates the use of precise instruments or calibrators to assess the performance of important attributes in other devices referred to as units under test (UUTs).

The following instruments are frequently submitted for electrical calibration:

• Data Loggers

• Electrical meters

• Multi-meters

• Oscilloscopes

• Frequency Counters

• Insulation Testers

• Loop Testers

4. Pipette Calibration

Pipette calibration is necessary for accurate and precise pipetting findings in laboratories that utilise this measurement device often. The calibration process and methods must be followed by all types of pipettes used in laboratories, including single-channel, multi-channel manual pipettes, and electronic pipettes.

The primary goal of pipette calibration is to guarantee that dispensing is done with the desired precision.

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