LT2 Trimmer Mount Leak Detector

Dedicated for use with Uniloy-style trimmers

Customers should consider our new LTU6000 model for new installations.

Triple Head Leak Detector

The LT2 was designed for direct mounting on Uniloy type trimmers. It interfaces directly to the trimmer control panel. There are LT2 models for both the older 110VAC AC trimmers as well as the newer 24VDC ones.

For new installations we recommend our new LTU6000 leak tester model.

1. Introduction

Improvements in electronic and pneumatic technology over the past 10 years have enabled a new leak tester to be designed which takes advantage of the latest technology.

Features which have been added include:

1.1. Microprocessor Control System

Up to 4 channels on a single circuit board

1.2. Extra Functions

Spare inputs and outputs are available to connect sensors for Handle Flash Detection, Jam detection, vision systems, alarms.

1.3. Improved Safety

Since all adjustments are from the front panel, it is no longer necessary for setters to have access to the inside of the control cabinet.

1.4. Self-Diagnostics

The cost of program memory is now very low, so it is easy to incorporate features that were not previously practical. Alarms can be displayed for:

1.5. Flexible Design

The design is highly flexible with respect to software, electronics and pneumatics.


Modular Pneumatic System

1.6. Cost Effective

The circuit card design is specifically for this application, and does not incorporate unnecessary components for another machine. At the same time great care has been taken to ensure that the system is flexible, re-programmable and reliable. Spare inputs and outputs have been incorporated so that extra functions can be added whenever required.

1.7. Detail

1.7.1. Higher Reliability

This is possible due to technology improvement, reduced component count, integration of all electrical functions onto the PCB, and a better understanding of the failure mechanisms.

1.7.2. Interference Immunity

The voltage spikes produced by electromechanical switching and static discharges can cause electronics to fail. This failure can be temporary (spurious operation) or permanent (component damage). To try to prevent spurious operation of the leak tester, it was common to wire all machine connections through various interference filter cards. This had varying degrees of success. It is now possible and preferable to suppress spikes and static discharges at the leak tester PCB terminals. This results in a much neater and easier to build system. The level of immunity of new designs is extremely high, far better than most bought-in industrial PLC's.

1.7.3. Improved Operator Interface

It is now cost effective to use a full alphanumeric display rather than a simple digital readout. This allows descriptive text to appear identifying all settings , results and warnings. The system is also much more flexible as a result. All settings are from the front panel. Setting changes can be locked out if required.

1.8. New Features Summary

2. Specification

Electrical Power Supply 110/120 single phase
Electrical Connection 10 pin HA-10 standard plug
Electrical Power consumption 50 VA maximum
Air Supply 4-10 bar
Air Consumption 1 litre / minute typical
Minimum bottle volume 500ml - 1 pint
Maximum bottle volume 25 litres - 5 gallon (unit will still work with any volume, but cycle time would be improved using another model).
Test Pressure Adjustable, 5 - 50 mB.
Cycle Time 1.0 - 20.0 seconds, adjustable.
Hole Size Detected Dependent on cycle time and container size. For a 500ml bottle and a 2 second test time, the hole detected would be 0.1mm.