Plastech Control Systems

 
Home Company Brochure Contact Products News Search

 

LT5 Specification

Electrical Power Supply 220/250 VAC single phase or 110/120 VAC Single Phase (specify when ordering)
Electrical Power consumption 50 VA maximum
Air Supply 4-10 bar
Air Consumption 1 liter / minute typical
Minimum bottle volume 250 ml
Maximum bottle volume 10 liters.
Test Pressure Adjustable, 10 - 40 mB. This range can easily be changed on request.
Cycle Time 1.0 - 20.0 seconds, adjustable.
Hole Size Detected See Graphs Below
Leak Test Method Ratiometric Pressure Decay, Auto-zero, Auto-Scale. Adaptive pressurization algorithm.
Transducer Semiconductor strain gauge diaphragm, 0.00 - 65.00 mB, 0.02% resolution, 20 x Over-pressure Protection.

Performance Graphs

Following are some performance graphs showing the sensitivity (hole size detected) of the LT5 series of leak detectors. Each graph shows performance for a particular bottle size. Each model of leak tester (Single, Twin, Triple channel etc) has a line on the graph.

To use the graphs, first choose the graph nearest to the bottle size of interest (0.25 Liters, 0.5 Liters, etc, shown at the bottom). Look along the horizontal axis and find the Throughput (10,20,30 etc bottles per minute) required. Draw a line upward from this point until you reach a colored line. (The model of leak tester represented by this line is shown as the "Number of heads" table on the right.) Read off the Hole Size Detectable from the scale on the left. If this is more sensitive than that required, continue upwards to the next model.

The graphs shown are all for a single in line conveyor configuration. For a dual in line conveyor system, use half of the total throughput required to select the number of heads per side, e.g. for a 250 bottle per minute system, use 125 BPM to select the number of heads per side.

Remember to allow a margin of speed to allow the leak tester to catch up with the machine after a stoppage, or when manually feeding extra bottles onto the conveyor.

250ml.gif (8885 bytes)

500ml.gif (8909 bytes)

1-litre.gif (8892 bytes)

1-litre.gif (8892 bytes)

2-litre.gif (8927 bytes)

3-litre.gif (8853 bytes)

5-litre.gif (8708 bytes)

Notes on Performance Graphs

The graphs above are based on real-life figures as measured on a wide range of installations, machine configurations and bottle types. This data has been used to create a mathematical model which produced the smooth lines above (instead of a series of measured data points). Realistic values are assumed for the variables involved (conveyor speed, bottle dimensions, bottle stretch characteristics, leak tester accuracy). The sensitivity shown is conservative. However, it is possible that a particular application will encounter different values for these. For example, an unstable bottle may require a slower conveyor. We suggest that you contact the office before specifying a particular model of leak tester so that we can take all parameters into account.
In short, Your Mileage May Vary.

 

Back Next
© Plastech Control Systems. Page updated 10 December 2002