OPERATOR’S MANUAL What You Can't Hear Is What You Need To Hear!
DECLARATION OF CONFORMITY This is to certify that this equipment, designed and supplied by Tracer Products, a division of Spectronics Corporation, 956 Brush Hollow Road, Westbury, New York, 11590, U.S.A., meets the essential safety requirements of the European Union and is placed on the market accordingly.
CONTENTS Declaration of Conformity.............................................................2 Contents.......................................................................................3 Features.......................................................................................4 Introduction/General Information.............................................. 5-6 Kit Configuration and Components.......................................... 6-7 Batteries (Changing/Replacing/Disposal)....................
FEATURES The Marksman II Ultrasonic Diagnostic Tool converts and amplifies inaudible ultrasonic sound into audible “natural” sound by employing technologically advanced circuitry. It operates on the principle of detecting high frequency ultrasonic waves, which are created by friction from all moving parts, whether solid, liquid or gaseous. These “sounds” reside far above the range of the human ear and tend to be highly directional.
INTRODUCTION Faults, malfunctions and/or flaws in mechanical, electrical and pneumatic devices, as well as in container-type objects, start as small defects or leaks. The physical size of these defects is so relatively small that the sounds they produce are above the range of human hearing. Most commonly, these faults generate sounds in the 38,000 to 43,000 cycles per second range, generally referred to as being in the ultrasonic range.
Many variables can affect the amount of ultrasound generated by the leakage of gas through an orifice. Such factors include the pressure/vacuum versus the surrounding environment, how smooth the edges of the orifice are, the diameter of the orifice, the leak detector’s distance from the orifice and the presence of airflow, which may dissipate the ultrasound. As you use the Marksman II, keep in mind that these factors may affect your ability to detect ultrasonic leaks.
Air and Contact Probes The air and contact probes are precision parts, designed to optimize the response of the Marksman II receiver. The 12 inch air probe extends its reach and can isolate one leak among multiple suspect areas. Do not modify the probes in any way and never use the probes for applications other than described in this manual. BATTERIES (CHANGING/REPLACING/DISPOSAL) Two “D” cell alkaline batteries are required (included).
Miscellaneous To prolong battery life, turn off the Marksman II when not in use, avoid rough handling, and keep it away from the elements. Use the carrying case for protection and for transporting. SAFETY PRECAUTIONS While the Marksman II allows you to focus on diagnosing a problem in a fast and effective manner, never lose focus of your surroundings. 1. Always remember that the Marksman II and its probes are an extension of your hand.
3. Press the power button to turn the unit on. The Marksman II will turn on at maximum sensitivity. The instrument will not beep or tick in an idle state but the battery LED will illuminate to indicate that the detector has adequate power. When the battery LED flashes, this indicates that the batteries are nearing the end of their useful life and will soon need to be replaced. Please note: Increasing the volume does not increase the unit’s detection sensitivity.
HETERODYNE FEATURE The Marksman II features heterodyne capability, which converts the ultrasonic frequencies detected by the instrument to sounds that can be heard by the human ear. This allows you to more easily isolate the ultrasonic source. Simply plug the included headphones into the jack on the right side of the Marksman II to enable heterodyne capability. Dragging your finger upwards/downwards on the sensitivity touch pad will increase/ decrease the volume of the headphones.
HIGH NOISE ENVIRONMENTS In noisy environments, it may be necessary to “tune out” unwanted signals from other areas close to where you are scanning for leaks or defects. Begin by attaching the air probe extension over the nose piece. When the extension is attached, the sensing angle of the instrument is reduced, increasing the directional capability and reducing the effects of the adjacent noise sources. This allows the probe to become more directional.
Mechanical Malfunctions The photo to the right shows a typical way to inspect a potential wheel bearing problem. In this case, the air probe is used since the wheel is being turned while listening for the sound of the bearings. The tip of the probe is kept 2-3 inches from the inspection area. Response can sometimes be optimized by removing the wheel and using the contact probe to touch the stationary center hub. This applies to motor housings as well when checking motor bearings.
gas exiting a hole or orifice under a differential pressure. It is independent of the type of gas or fluid in the system. The Marksman II will readily detect air and vacuum leaks typically caused by bad gaskets, worn valve seats and cracks in pipes, hoses or fittings. Non-Pressurized Leaks Non-pressurized vessels or containers cannot generate ultrasonic sounds. The supplied ultrasonic emitter is used to broadcast an ultrasonic noise, which is optimized to the frequency response of the Marksman II receiver.
VEHICLE APPLICATIONS VACUUM LEAKS: Place the hollow air probe on the unit and listen and watch the LEDs. You can pinpoint the location of vacuum leaks quickly and easily. Use the hollow air probe or use the receiver alone. FIND THAT ENGINE NOISE. The Marksman II will locate those engine noises and let you find where they are truly coming from. Ultrasound does not transfer within engine components due to the directional characteristics of ultrasound. Use the solid contact probe.
EVAP SYSTEMS: Checking for leaks in evaporative emission systems is simple. Start by pressurizing the EVAP system (do not exceed the recommended pressure). Now, sweep all the hoses and components of the system and listen for a hissing noise that would indicate a leak. Once the general area of the leak has been determined, move closer with the receiver to pinpoint the exact leakage source. Use the hollow air probe or use the receiver alone.
TIRES: Sweep the tire, including the rim and valve system, to search for leaks. A sweep with the ultrasonic receiver will locate even the smallest of leaks. The receiver normally finds leaks of sufficient magnitude before they cause downtime on the highway. In addition, you can put a soap solution on tires and listen for the bubbles to pop. Use the hollow air probe or use the receiver alone.
ADDITIONAL APPLICATIONS HYDRAULIC SYSTEMS: Partially blocked or bypassed valves in high-pressure hydraulic systems can be difficult and costly to find with conventional methods. Since hydraulic systems employ very high pressures, the intensity of the ultrasonic sound given off by an internal leak is extremely high and easily detected by the receiver. Use the hollow air probe, solid contact probe or use the receiver alone.
CARE AND MAINTENANCE To clean exterior surfaces, wipe with a soft damp cloth. When the battery LED flashes, the batteries are near the end of their useful life and will soon have to be replaced. See Batteries (Changing/Replacing/Disposal) on page 7. WARRANTY AND LIABILITY Your Marksman II Ultrasonic Diagnostic Tool is of the finest design and craftsmanship. As such, Tracer Products warrants that when delivered it will be free from defects in manufacture.
TECHNICAL SPECIFICATIONS Sensitivity...................................... Detects leaks or defects through a 0.004 in (0.1 mm) diameter orifice at 5.0 psig from a 12 in (30.5 cm) distance Usage............................................ Indoor or outdoor Operating Temperature Range* +32 °F to +122 °F (0 °C to +50 °C) Storage Temperature Range......... +14 °F to +140 °F (-10 °C to +60 °C) Humidity........................................ 85% RH NC Max. Altitude..........................................
REPLACEMENT PARTS AND ACCESSORIES Ultrasonic Receiver........................................................TP-127298 Ultrasonic Emitter...............................................................TP-9368 Air Probe............................................................................. 127300 Contact Probe..................................................................... 127301 Headphones, Full-sized Noise-Attenuating...........................127302 Carrying Case.................................
