Vacuum Leak Testing Instrument
The PT-LT100 leak tester is used to test for the integrity of packed strips, blisters and small sachets containing tablets, granulates, liquids and so on. The instrument is used to test the quality of the packaging process and to check that the seals enclosing the product are perfectly intact. PT-LT100 is designed to find the smallest holes and imperfections in blister packs and other semi-rigid product packaging. It is fully compliant to the current USP <1146> monograph.
PT-LT100 leak tester
Leak testing is widely applied in the pharmaceutical industry to check strips, blisters and bottles containing tablets, capsules, syrups and similar. It also finds application in the food industry, where it can be effectively used to check the airtightness of sweet packets, ready-to-eat pre-packed foods, confectionery packaging, packs of noodles or sauces. Samples are placed into the desiccator’s housing and the lid is placed in position. The pump starts to produce a vacuum inside the desiccators and the vacuum is held for a pre-set time.
The first thing to observe is that he tested package should keep its shape during this test; otherwise, the sealing is not correct. Secondly, as the package is immersed in a colored dye solution (normally Methylene Blue), the venting of the desiccators will allow any holes to be penetrated by the dye and the contents of the flexible packaging will also be stained with the same coloring material. Similarly small bottles can also be tested. A sheet of paper will absorb any leaking fluid.
Operation Principle
Vacuum Level and Holding Time
Set vacuum level and holding time for your test. Up to four different vacuum levels and corresponding holding times can be programmed in a method. This way a product can be tested in a sequence of different vacuum levels, each with their own holding time. The instrument can be set to actively maintain the current vacuum level during the holding time. Besides visual inspection of the sample after test, it also optionally possible to connect a balance to the instrument. This way the sample can be weighed before and after the test.
Testing with Liquids
If the test is performed by immersing the sample in a liquid, the sample weight will increase in case it absorbs liquid through leaks.
If the sample is a container with liquid inside, the sample weight will decrease in case liquid is sucked out of the container through leaks.
User Interface with Click Wheel Navigation
PT-LT100 is operated by using a click wheel to navigate menus on the LCD screen and by functional keys to shortcut frequent operations. The display is backlit in changing colors that show the instrument status in a familiar traffic light system (green, yellow, red). Navigating the menu is quick and simple. The color-changing display makes it easy for the user to see when his input is required to proceed.
Method and User Management System
The instrument has a method and a user management system. Methods can be programmed, edited and stored directly on the instrument. Users can be created and assigned different user levels according to their roles (method or standard user, only one Admin). Access to the instrument is protected by a login with username and password.
Quick Test
Optionally a quick test menu can be accessed without logging in to the instrument first. This way tests can be performed with the instrument in case user access control and testing according to defined methods is not required.
Integrated Report Printer
PT-LT100 features an integrated report printer to document the test and calibration results. An integrated printer saves valuable bench space in your laboratory.
Data Storage and Export
A USB flash drive can be connected to the instrument to save and load methods in .csv-format. Printouts can be stored as text files. Results can be transmitted to external systems such as LIMS via a serial interface. Furthermore, instrument firmware updates can be installed, and factory settings be restored by using the flash drive without the need for any PC or programming tool.
Cleaning and Maintenance
The integrated vacuum pump can be calibrated using an external vacuum meter. The air sucked in by the vacuum pump passed through a filter. The filter can be replaced easily without opening the instrument.
Calibration
PT-LT100 features dedicated calibration programs for vacuum and timer function. The result can be documented by a print-out. The user is guided through each step of the calibration and a report is printed automatically.
The reports are saved on the instrument and can be printed later as well. A programmable qualification interval timer reminds the user to perform the instrument calibration once it is due. Each time the instrument is turned on it performs a quick self-check to ensure it is ready for operation. The result of the self-check can be documented via the integrated printer as well.
Available Desiccators
Desiccators with the following dimensions are available:
One desiccator is required to use the instrument.
| Part No. | Inner Diameter | Useable Inner Height | Volume | Material |
| 26-02010 | 150mm | 135mm | 2,15l | Plastic |
| 26-02030 | 200mm | 175mm | 4,35l | Plastic |
| 26-02020 | 250mm | 225mm | 9,20l | Plastic |
| 26-02040 | 380mm | 283mm | 18,5l | Glass |
| Parameter | Specification |
| Final vacuum level | -100 to 900mbar (desiccators ?300mm) -100 to 950mbar (desiccators ?250mm) |
| Maintain vacuum level | Yes, adjustable in method |
| Maximum vacuum hold time | 99 hrs. 59 min. 59 sec. |
| Number of vacuum levels | Up to 4 vacuum levels per test |
| Number of vacuum hold times | Up to 4 vacuum hold times per test |
| Number of test runs | Up to 9 runs per test run adjustable in method |
| Method management | Up to 256 test descriptions (methods) can be stored on the instrument |
| User management | Up to 32 users with selectable user right levels can be stored on the instrument |
| Result data storage | Store copies of result reports by connecting a USB flash drive |
| Display | LCD with color-changing backlight |
| Data entry | Keypad with function keys and click wheel |
| Interfaces | USB type A host port to USB type B device port to connect flash drives, for serial data export and firmware updates RS-232 printer port for optional balance or external printer |
| Instrument housing | Brushed stainless-steel housing |
| Power | 100-240 Volt, 50/60 Hz |
| Instrument dimensions | Approx. 32 cm x 25 cm x 31 cm (width x depth x height) |
| Packaging dimensions | Approx. 61 cm x 42 cm x 33 cm (width x depth x height) |
| Net /gross weight | Approx. 7,0 / 13,5 kg |
| Certification | All components certified to USP / EP requirements |
| CE / EMC certification | All CE / EMC Certification provided |
| Validation | All IQ & OQ documents included |
We reserve the right to make technical changes without any prior notice.
In addition to the standard scope of supply Pharma Test offers a broad range of accessories and options including:
