LS-1881 / LU-80A DP Leak Testers

Leak detection circuit with internal pressure detection method, available in Intelligent 1 Pneumatic Circuit and Intelligent 2 Pneumatic Circuit. The differential pressure sensor and air operated valves are integrated with the manifold in a highly durable structure that minimizes breakdowns. In each test, the differential pressure sensor and the valves are self-checked to ensure that the judgment result is reliable.

The improved differential pressure sensor, which is the heart of the Air Leak Tester, and the high-performance AD converter have realized measurement stability in units of 0.1 Pa. These effects are expected to improve measurement accuracy and shorten test time.

Error components due to adiabatic compression, deformation, etc. during measurement are extracted and compensated using the value, enabling testing with a considerable error component, reducing measurement time and at the same time facilitating control on the master side. In addition, the system follows gradual environmental changes, such as room temperature, to achieve more stable measurements.

To display differential pressure due to leak in flow units such as mL/min, a flow coefficient (Equivalent Internal Volume) is required. There are two methods to measure this coefficient: the volumetric change method and the Leak Master method. In addition, the fully-automated ALC (volumetric change method) and the automatic Leak Master provide the K-check function that not only measures the flow coefficient but also automatically checks for changes in leak sensitivity.

Up to 8 pneumatic cirtuit units connected to and controlled by a Controller reduces costs. Separately installed pneumatic circuit units realizes space saving.

Up to 100 channels can be set to handle a wide variety of works.

Automatically checks the opening and closing of the manual valves used for leak check of the tester itself. Detects if the valve(s) are left closed after a leak check, preventing leak testing with the valves closed.

A port provided on the front panel for daily inspection and leak calibration. Differential pressure and test pressure can also be inspected and calibrated.

When the leak limit is lowered to pursue accuracy or to shorten measurement time, the ratio of noise to the measured value will increase. In the Noise Reduction (NR) mode, indeterminate judgment areas are set for the initial Detection, and if the work falls within one of these areas, the noise component is removed by repeating Detection so that false rejection of good works can be reduced.

To prevent malfunctions due to water or oil inside the works entering the tester, an externally installed exhaust valve (optional) is controlled by the tester.

For a system with multiple leak testers, the exhaust process can cause large fluctuations in the source pressure. It can have a negative impact on the tester(s) that are still measuring. This function is provided to prevent this problem.

Easy-to-understand large color touch panel LCD allows intuitive operation.

By connecting the tester and PLC via a fieldbus, the communication cables can be significantly reduced, and settings can be easily made with the EDS file provided by us.

A USB memory can be used to store large amounts of data for long periods of time, and data can be easily transferred to a PC.

Allows you to send and receive files using FTP client software.

Allows you to switch the display between multiple languages, including Japanese, English, and Chinese.

Check the connection of the signals with external PLCs, such as start/stop signals and pass/fail signals, on the screen. This is very useful when equipment is connected.

The latest 1000 work data (5000 for LS-R902) can be stored and displayed in a graph, which is useful for monitoring changes in work characteristics and changes in the measurement environment. In addition, the Mastering characteristic graph makes it easier to set test conditions.

Test pressure is remotely controlled by an E/P regulator. Different settings for each channel and high-speed charging are possible.

To reduce pressurization time for large-volume works, the tester directly controls the valve of an externally installed bypass circuit unit (optional).