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Leak tester
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Tel.: +49 (0) 71 95-13 69 0
eMail: verkauf(at)hematech.de

Differential pressure leak testing provides accurate measuring results and can be easily integrated into most automated systems.
Compressed air is used as test medium resulting in low operating costs and freedom from contamination.
Because of the low viscosity air quickly penetrates porosity or other leakages. Cleaning and drying of previously tested parts, as well as corrosion protection, is not required.
As for all pressure leak test systems leak free test fixtures and related components are required.

 

Automation of the workplace nowadays have to be realized even in quality assurance and the equipment used. To test production parts for leakage, it is necessary to integrate the leak test in the manufacturing process.
Important features of the LEAK TESTER 3925-0060 are:

 

    • automatic control cycle
    • storage of test programs
    • contamination free test
    • reproducible measuring results
    • short cycle times with high accuracy
    • unambiguous results
    • measured value display
    • programmable test pressures and test times to suit testing to the production of many different components
    • user friendly operation with interactive user guidance
    • modular design concept for ease of maintenance and service

Operating principle

The operating principle is based on measuring the pressure change between a sealed test part and a sealed reference volume within a given measuring time. The core of the measuring system consists of a differential pressure transducer with automatic zero-point correction.

  

 

Operation

Programming of the control and test parameters is menu guided - no special knowledge is required. The test parameters in the program register and can be recalled as required. Different selectable languages are available.

A write-protect key switch ensures data security. Data can be read but not modified by the operator.
 
Machine control systems are able to communicate with the leak tester via the standard parallel (discrete I/O) interface or various other optional interfaces. 
A serial interface is available to connect the leak tester with a computer or printer. Other optional protocols are available (see technical data).

 

 

Pneumatic System

    • heavy-duty, robust diferential pressure transducer

• overload protection to 150 bar/g
• temperature compensated
• easy to maintain

  • microprocessor controlled electronic pressure regulator for filling and test pressure
  • pneumatic controlled shut-off valve to eliminate tmeperatur influence
  • function monitoring
  • optional leak simulation with precision needle valve for the connection of an external leak calibrator (available as optional accessory)



Electrical System

  • modular design microprocessor system
  • battery buffered RAM for data protection
  • alphanumeric keypad
  • 5 inch color display
  • write-protect key switch to prevent unauthorized program changes
  • error message as plain text
  • menu guided programming and adjustment of parameters
  • various interface ports to communicate with control systems (see technical data)

Technical data

 

Program storage:   Battery buffered RAM
   
Measuring sensor:   Temperature compensated transducer for differential pressure, overload protection 150 bar/g
     
Display:   5 inch color liquid crystal display, 320x240 Pixel
     
Keyboard:   Alphanumeric
   
Measuring range:   0 ... 2,000 Pa,
others on request
   
Resolution:   1 Pa, by means of high resolution
SigmaDelta A/D converter, 1 converter per channel
   
Results in:   Pa; mm WC; mbar; psi; mm HG, ml/min
   
Test programs:   up to 99
   
Filling and test Pressure:   electronic pressure control with tolerance montotring
-1.0 ... 0 bar/g; -0.7 ... -0.1 bar/g;
0.1 ... 1.0 bar/g; 0.15 ... 2.5 bar/g;
0.2 ... 6.0 bar/g; 0.5 ... 10.0 bar/g;
0.5 ... 12 bar/g
(others on request)
   
Test parameters:   Filling pressure ... bar
Test pressure ... bar
Filling time 0.1 ... 999.9 s 
Compensation time 0.1 ... 999.9 s
Measuring time 0.1 ... 999.9 s
Rework limit ...
Reject limit ... 
Consecutive rejects limit
   
Write protection:   Key switch
   
Status indicator:   Accept
Rework
Reject
Fault
Leak simulation ON
     
Test data storage   Up to 8,000 tests (internal battery buffered RAM)
for larger data storage use front connection for external USB storage stick
optional larger internal memory is available
     
Interfaces:  

1 parallel control I/O port

Control inputs:
24V DC; 500 mA 
1 Bit Automatic
1 Bit Device Ready
1 Bit Start
1 Bit Leak simulation 
1 Bit Flooding (static test)
8 Bit Program Select
1 Bit Abort

   
    Control outputs:
24 V DC; 500 mA 
short circuit proof
1 Bit Ready to operate
1 Bit Ready to test
1 Bit Error
1 Bit Accept
1 Bit Rework
1 Bit Reject
1 Bit Measuring
   
   

1x Serial Port RS 232 port or USB 2.0 for transfer of parameters, test results and counter readings.

1x USB 2.0 for transfer of parameters, test results and counter readings.

Optional Bus Interfaces:
FastEthernet, Profibus, Profinet, others on request

   
Housing:   19" rack mount case, 3 HU
   
Dimensions:   165 x 590 x 420 mm (H x W x D)
   
Power supply:   115 /230 V ± 10% 50 ... 60 Hz
   
Power consumption:   Approx. 100 VA
   
Air supply:   Test air: 1.5 bar > max. test pressure
Control air: max. 10 bar/g
filtered, dry and oil-free
   
Pneumatic ports:   Air supply G1/4",
optional test medium port G1/4"
Test port G 1/8",
Reference port G 1/8”
Venting (through air silencer) G 1/4"
   
Weight:   Approx. 15 kg
   
Standard accessories:   Power cord, approx. 2.5 m long,
Spare key for write protection
Operating manual
   
Order-No.:   Leaktester 3925-0060
f    
    Specifications and technical data are subject to change without notice.
   

 

Contact

HeMaTech Prüftechnik GmbH & Co. KG
Siemensstr. 7
D-71409 Schwaikheim

Tel.: +49 (0) 71 95-13 69 0
Fax: +49 (0) 71 95-13 69 29
eMail: verkauf@hematech.de

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