The Qualipack 770 measures leaks in packaged products, using the principle of force decay. The package sample is placed on an infill, on top of a load cell, then sandwiched between the infill and top plate. The lid is closed and secured. A vacuum is applied causing the package to expand due to any gases remaining in the package. This expansion creates a force on the load cell. Once the set vacuum or force level is reached, the chamber is isolated, the pack allowed to stabilize and any force change is detected with a sensitive load cell transducer. Any significant change in force decay is indicative of a leak. No significant change in force indicates a good package seal.
List of major benefits to customer
- Small bench footprint; the electronics and pneumatics unit can be located away from chamber
- Can accommodate many different sizes of packages
- Can be connected to an Uson Qualitek mR for single devices or an Uson Optima vT for 2 to 4 simultaneous tests, giving the customer lots of flexibility, data logging, printout, graphs, traceability
- Simple operation Load, Start, pass/fail, unload, and repeat
- Easy to scale up from R&D, to production, and mass production. (seven cavity custom chamber)
- Can detect hole size down to 5 microns depending on pack type.
- Also can be used for testing foil trays.
- Testing Parameters
- Physical Characteristics
The Qualitek 770 is based on the force decay test principle for flexible package testing.
The test principle is a vacuum applied to the chamber, which encourages the pack to inflate. The package infants until the control vacuum is achieved, creating a force onto the load cells. Once the control vacuum has been reached, the chamber is isolated for period of time to allow the package to stabilize. The force is then monitored for a decay. If the force decays at a rate greater than expected, the instrument fails (red light) the part. If the force does not decay then the instrument passes, Accepts (green light) the part.
Max Package Size: Internal chamber size: 355 mm (14 in), circular
Single (WxDxH): 355 mm x 177.5 mm x 80 mm (14 in x 7 in x 3.1 in)
Dual (WxDxH): 177.5 mm x 88.75 mm x 80 mm (7 in x 3.5 in x 3.1 in)
|Description:||Single or Dual Package Test Chamber|
|Test Technique:||Force Decay|
|Testing Mode Tolerances:||Specified at normal operating conditions of 20°C (68°F), 40%RH ±5% and at standard sea level|
|Accuracy Levels:||Requires instrument quality compressed air input and stable electrical supply of the correct voltage and frequency|
|Pressure Measurement:||Vacuum to 90 psig ±0.3%|
|Sensor Type:||Solid State sensor|
|Resolution:||0.001% of full scale|
|User Selectable Pressure Range Units:||mbar, mm Hg, in H2O, kPa & Kg/cm2|
|Pressure range:||0 to -950 mbar (vacuum)|
|Force Measurement Sensitivity:||10 micron Note: Minimum suggested value to base a pass/fail decision|
|Force Range:||0 to 50,000 grams|
|Force Accuracy:||±1.0% of reading, ±0.01% full scale|
|Force Repeatability:||±15% of reading for a 12 micron hole fitted to the challenge unit. Note: The above tolerance is the typical limit of the most common type installed, in practice the measured accuracy will vary on an instrument to instrument basis. The calibration certificate should be referred to for a precise understanding of any single tester.|
|Step Timer:||+1.0% when measured over a 20 second step|
|Storage Temperature:||-20°C to +70°C|
|Operating Temperature:||0°C to 40°C|
|Humidity:||0% to 90% Non-condensing|
Power Supply, Test System:
95 to 265 VAC, 45 to 65 Hz
Closed: 470 mm x 470 mm x 260 mm (18.5 in x 18.5 in x 10.2 in)
Open: 470 mm x 470 mm x 640 mm (18.5 in x 18.5 in x 25.2 in)