2 GENERAL INFORMATION AND SPECIFICATIONS 7
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GENERAL INFORMATION AND SPECIFICATIONS
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LS-1866 is an air leak tester based on a differential pressure method that tests the air tightness of various
parts and products. Air leak tester allows not only enhancing a detection capability but also an automated
detection process. Ideal for professional and industrial use.
Housing a high-sensitivity, high-pressure differential sensor and air-operated valves free from thermal
effects, the unit is built of intelligent air circuitry that makes on various checks during each run of testing,
including valve action and sensor sensitivity checks, to assure exceptional performance and reliability. Its
Master-Preset feature and noise reduction feature support assures enhanced detectability or shorter test
times. Other user conveniences include compatibility with various kinds of tested parts, direct reading of
leak rates, and easy-to-service CAL ports.
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a) Master-Preset compensation feature
• This feature compensates the drift errors caused by the volume difference between the tested part
and the master, adiabatic compression effect and change in ambient temperature.
• Cosmo’s patented Master Chamber that is easy to adjust and maintain can be used as a Master
(Reference) to reduce installation cost.
• Suitable measurement for different part can be achieved by executing Master-Preset process.
b) 2 levels of limit settings and Noise Reduction (NR) mode
• Sorts out NG-judged part by magnitude of leakage.
• In NR mode, DET stage is repeated for the rejected parts fell between the two limits to minimize
false rejection good parts.
c) Leak rate unit (mL/min) can be displayed.
• Differential pressure is converted into leak rate by calibration with Leak Master (LM-1B).
d) High-performance differential pressure sensor and Intelligent I Pneumatic Circuit
• Equipped with a differential pressure sensor that is highly sensitive, proof against high pressure
and low volume. The pneumatic circuit is simple yet full function.
• Equipped with air operated valves with high flow capacity, which is free from thermal effect.
• Includes self-cleaning feature to protect sensor from being contaminated with water and oil inside
the tested part.
• The sensor and the valve performance is automatically checked at the end of the each test cycle to
ensure reliability of leak testing.
e) Multi-channel
• 16 different sets of test parameters can be programmed independently. A channel copy feature
eases multi-channel setting.
f) CAL ports
• CAL ports are easily accessible on the front panel for daily sensitivity check using a Leak Master or
a Leak Calibrator. These ports are also convenient for periodic calibration of the differential
pressure and the pressure gauge.
g) Test pressure and Leak limit setting monitoring
• Test pressure is digitally displayed.
• Upper and lower limits of test pressure can be programmed
• Leak limit setting can always be monitored on the sub-panel
h) Serial communication
• The tester can be connected to computer and/or printer through the serial communication port to
maintain and control the test data.
• Use of a multiplexor enables to connect multiple testers to a single computer.
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