Applications necessitate varying levels of accuracy. While measuring the pressure of a home water system doesn’t require the same precision as a medical sterilizer, the reliability of any parameter measurement hinges on its accuracy. However, even the most exceptional pressure gauge can experience diminished accuracy over time. To ensure consistent reliability and reproducibility of your gauge, regular?calibration verification?is imperative. This article will outline the factors to consider during calibration checks and elucidate how verifying the calibration of a pressure gauge guarantees sustained accuracy for your specific application.

What is Calibration and Why is it Checked?

Calibration involves making adjustments to guarantee that an instrument indicates within specified accuracy limits.

Calibration verification refers to the act of assessing the accuracy of an instrument by comparing it to a known standard of accuracy and quantifying the result as a percentage of the instrument’s range.

Concerning pressure measuring equipment, calibration maintains precise measurements by taking into account the following factors:

• Accuracy:Refers to the proximity or deviation of a set of measurements or readings from their true value. Accuracy is typically expressed as a percentage of the gauge’s full scale.
• Tolerance: Denotes the maximum allowable deviation from a specified value and is often expressed in the units of measurement. For instance, a gauge with a range of 100 psi and an accuracy of ±1% of the range will have a tolerance of ±0 psi at any point on the measurement scale.
• Precision:Indicates the proximity or dispersion of measurements to one another, as well as their repeatability.

So, why is it important to check the calibration of your pressure gauge?

Calibration may be necessary in the following situations:

• When using a new instrument
• After repairing or modifying an instrument
• When a specified time period or a certain number of operating hours have elapsed
• Before and/or after conducting critical measurements
• Following events such as shocks, vibrations, or exposure to adverse conditions
• In case of sudden changes in weather or environment
• Whenever observations seem questionable
• As specified by requirements, customer specifications, instrument manufacturer recommendations, and so on.

Uncertainty of measurement reflects the doubt surrounding the result of any measurement. In everyday terms, it can be expressed as a margin of error. For instance, a stick may be two meters long, give or take a centimeter, or 20 cm ±1 cm, with a 95% confidence level.

Accuracy or error represents the disparity between the measured value and the true value of the measured quantity. Accuracy is a qualitative concept that measures the closeness of agreement between the measurement result and the true value.

Uncertainty quantifies the doubt associated with the measurement result. It acknowledges that measurements can never be perfect and is defined as a parameter linked to the measurement result, characterizing the range of values that could reasonably be attributed to the measured quantity.

Typically, uncertainty is expressed as a range of values within which the true value is estimated to lie, with a certain statistical confidence level. However, it does not attempt to define or rely on a single, unique true value.

SHELOK Y039 Handheld Pressure Calibrator?is a liquid hand pressure pump. lt is used to calibrate the pressure instruments of the industrial process in the field and/or control room. Also it can be used as a pressure generator or pressure instruments, All kinds of pressure transmiter and pressure gauge and other pressure instrument that with a pressure below 1.6mpa, can be calibrated by this pressure pump.

Features

The hand-operating pressure pump?is portable, light weight, wide temperature range, easy to use. There is a trim adjustment handle valve and switch valve on the pump, so that it is easy to adjust the pressure or exhaust the air. There are also matched fast connection, nylon hose, instrument connector etc, used to connect the calibrated instrument and the standard gauge. The pump is easy to carry and to connect with the calibrated instruments in the field, so the operator can calibrate the instrument fast and simple.

Applications

it is suitable for calibrating various differential pressure, vacuum pressure and pressure instruments, and can also be used as a vacuum pressure source for the above pressure instruments.