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LTI-250A |
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 Dual Channel LTI-250A Leak Test |
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The LTI-250A is a unit that can be used for performing mass flow or pressure decay tests. The unit is recommended for applications in which two different tests need to run concurrently or when machine control is needed. The leak tester has the ability to store the leak rate detected and test results. The results can be collected through the use of the RS-232 port supplied on the unit. |
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| TEST METHODS | |||
| MASS FLOW | |||
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The LTI-250A displays corrected airflow readings through the use of a mass flow transducer. This state-of-the-art technology provides test results, which are independent of daily changes in barometric pressure and ambient temperature. This leak test instrument measures the leakage or flow of air through the part under test at a specific test pressure. When the leak test is initiated this instrument automatically pressurizes the part, allows the air pressure within the part to stabilize, and measures the actual leakage through the part. The leakage or flow is displayed in actual engineering units.
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| PRESSURE DECAY/CHANGE | |||
| Two pressure decay/change methods are available depending upon the specific application. Applications with a high leak rate specification or a small test volume utilize a gage-pressure-decay test method. Applications with a low leak rate specification or a large test volume will use a pressure-differential-decay test method. With either method this leak test instrument pressurizes the test part, allows the air pressure within the part to stabilize, and measures the decay/change in pressure. | |||
| SETUP & OPERATION | |||
The LTI-250A leak test instrument is easy to setup and operate. The setup procedure i s menu driven in response to operator inputs to the front-mounted color touch screen display. A maximum of fifteen (15) test parameter limit tables
are included with this unit. Setup parameters for each table includes fast fill pressure and tolerance, test pressure and
tolerance, cycle times, accept/reject parameters, consecutive reject set point, and orifice qualification set points.
Transducer calibration is also menu driven. |
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SYSTEM ENCLOSURE |
The LTI-250A is housed in separate enclosures linked by an electrical cable(s). One (1) electrical enclosure and up to two
(2) pneumatic enclosures are provided. The electrical enclosure contains the processor, color touch screen, power
supplies, push buttons, and indicator lights. One (1) RS-232 output port, external to the enclosure, is available for data
output. The pneumatic enclosure(s) contain the pressure and leak transducers, regulators, and valves. Ports are
provided on each enclosure for air and power connections. The standard color for the LTI-250A is white. |
| DIMENSIONS | |
Control/Pneumatic Enclosure Pneumatic Enclosure |
12" high x 14" wide x 8" deep 12" high x 14" wide x 8" deep |
| WEIGHT |
Control Enclosure Pneumatic Enclosure |
27 pounds 32 pounds |
ENVIRONMENTAL CONDITIONS |
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| Operating Temperature Storage Temperature Test Part Relative Humidity |
35-130°F (2-55°C) 35-150°F (2-66°C) Room Temperature 0-95% Non-Condensing |
| POWER REQUIREMENTS | |
| Input Power Frequency Current |
100-250VAC 50 or 60 Hz 2.5 amps maximum |
SHOP AIR REQUIREMENTS (CLEAN, NON-LUBRICATED, DRY AIR) |
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| Pressure Test | Input Pressure | 125 PSIG maximum (STD) |
| Test Pressure | 100 PSIG maximum (STD) |
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| Vacuum Test | Input Vacuum | 30 in Hg maximum (STD) |
| Test Vacuum | 25 in Hg maximum (STD) |
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CONTROL INTERFACE |
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Inputs |
(4) BCD Remote Start/Stop per Channel | 24 VDC or Dry Contact |
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| Outputs | (1) End of Test per Channel | 24 VDC or Dry Contact |
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| (1) Accept per Channel | 24 VDC or Dry Contact |
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| Printer | (1) RS-232 Serial Port | Data Output (ASCII) |
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| Network | (1) DirectNET Port | Max. Baud Rate = 19.2K |
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PERFORMANCE (FLOW RANGE AND SCALING) |
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