What are the 5 Factors to Consider When Choosing a Deadweight Tester?

Precise calibration and measurements are essential in several industries, including oil and gas, manufacturing, labs, research and development, etc. If your organisation also falls under these industries, then you might need assistance from dead weight pressure testers in Singapore. Deadweight testers work by creating pressure by compressing the material in their base. The aim is to balance the known reference pressure with the Device Under Test (DUT). In this setup, a piston-cylinder system with calibrated weights provides the reference pressure. Once the material is compressed to balance, the piston will move freely, allowing calibration of the DUT. The pressure is determined by dividing the force from the weights by the piston’s cross-sectional area. Recording DUT readings at different points in its range helps ensure accuracy within specifications. However, when choosing a deadweight pressure calibrator for your business in Singapore, it is important to choose the right tools, as it makes the process more efficient. Let us discuss a few points to look into when choosing the right deadweight for your business:

Selecting the right deadweight tester: consider different environments:

For field applications like power plants or maintenance, it’s better to look for a deadweight tester that’s tough, portable, and works with pressure media compatible with field devices. When searching for a dead weight pressure tester for calibration labs in Singapore, instrument accuracy holds the utmost importance. Additional parameters like piston temperature and position may need monitoring, with the potential use of sensors for overall calibration uncertainty.

Choosing the ideal pressure media for deadweight testers:

You also need to select between gas (pneumatic) or oil/water (hydraulic) media based on DUT type, pressure range, and process connection. Pneumatic deadweight testers can handle bidirectional, gauge, and high-pressure calibrations.

Optimising the operating range for deadweight testers:

Aligning the deadweight tester’s operating range with the DUT’s range plays a crucial role. This depends on the piston-cylinder system and the weight range. Opting for a dual piston mechanism can simplify selection and enable two ranges within the same setup.

Ensuring accuracy in deadweight testing: understanding the test uncertainty ratio (TUR)

The test uncertainty ratio (TUR) guides the deadweight tester choice, with the reference ideally four times more accurate than the DUT (4:1 TUR). The accuracy combines the piston-cylinder system and mass sets. Accurate deadweight testers are critical for calibrating various devices.

Stay knowledgeable regarding starting pressure insights:

Starting pressure is the minimum observed when the piston-cylinder system is floating. Consider both the DUT’s full-scale range and the minimum required pressure. Ensure the deadweight tester can reach the lowest pressure needed for the intended DUT ranges, often determined by the weight of the piston-cylinder system, without additional mass sets. Unitest Instrument features deadweight pressure calibrators for various organisations in Singapore. Check out our website!