The TIF 5650 leak detector is an instrument for detecting escaping refrigerant from a sealed refrigerant system. Once the device is activated, the probe end is drawn over the tubing and components. If the pump pulls in enough refrigerant to burn as it passes by the heater, it will sound an alarm and/or for visual reference flash LEDs in a graduated scale to indicate the volume of refrigerant detected.
As with all devices the leak detector has an "Achilles heel" that if allowed to go unheeded will render the device less than effective. The first thing to remembers is to keep the tip clean! Do not drag the tip through oily components. Do not allow the sensor in the tip to get contaminated by moisture, oil, dirt or dust.
Keep the batteries charged. Some recommendations suggest that a spare battery assembly be kept on hand and charged and ready to go when the one in the device becomes less effective. Managing the battery power is important. As the batteries lose their effectiveness even a fully charged battery will not have the potential needed to operate the pump and heater circuits effectively, resulting in poor performance by the TIF 5650.
Made sure the filter is kept clean. It may or may not have a filter in the probe tip, but there should be one. Keep the batteries charged, and keep the battery compartment clean and free of corrosion. Keep the instrument in its carrying case when not using it. Do not let it be dropped or tossed around.
When the instrument is not being used, store it in a dry and clean place. Too often they end up thrown in the back of a service van without regard. In short, the TIF 5640 is a complicated instrument and to treat as such will add to its reliability and performance.