l. The Laboratory System

1. The METS® system provides an accurate TDC reference for any engine event or crankshaft-phased
   data, including data for the analysis of cylinder pressure, compression ratio
   and minimum cylinder volume, crankcase oil pressure, relative cylinder power
   contribution, and engine noise/vibration.
2. If the laboratory
   consists of a large number of engine test cells, then one or several METS®
   systems can provide an accurate TDC reference for calibration of low cost
   engine event phasing instruments located in each cell. This calibration is
   performed only once on each engine when it is first installed in the test
   cell.

ll. The Production System

1. If METS® systems are part of the engine production test stands, then a portable or laboratory
   METS® system can be used to evaluate microwave frequency and METS®
   software parameters for all new engine combustion chamber types. This information
   can then be incorporated into the production stand METS® systems.
2. During production, if a stand METS® system cannot time a particular engine, then the diagnostic
   feature of a portable or laboratory METS® system, when used with an oscilloscope,
   can allow immediate determination of whether the problem is with the test
   stand or with the engine.

lll. Reliability and Durability Testing

1. During engine life tests, use the METS® system to periodically obtain spark or injector-timing
   data, including scatter statistics (also, measure at several different RPM
   values to monitor the advance curve).
2. During engine life tests, periodically measure other TDC-referenced engine events, such as the
   crankshaft sensor signal for the engine control computer and the opening of electronic fuel injector(s).

IV. Quality Assurance Programs

1. For quality audits
   and long term statistical process control (SPC), periodically measure off-line
   the crankshaft location of TDC-referenced signals such as engine computer
   inputs and the timing of spark firing or fuel injection.
2. For quality audits, SPC, and long term field serviceability, periodically measure off-line the
   crankshaft location of the damper notch/probe bracket combination. If this
   location varies from its design specifications, then accurate notch-based
   field timing of spark firing or fuel injection will not be possible.

V. Emissions Testing

1. For test engines of test vehicles with unacceptable emission levels, use the METS® system
   to measure the timing of spark firing or fuel injection and the associated
   scatter statistics.
2. If the timing is
   incorrect and adjustable, use the METS® system to accurately readjust
   timing. Emission levels can then be rechecked for conformance to acceptable
   levels.

VI. Remote and Field Testing (Portable METS® System only)

1. With a power inverter
   (12 VDC to 110 VAC), the portable METS® system can be used in cars, trucks,
   boats, and off-highway vehicles. Engine events can be accurately timed with
   respect to TDC while operating under a wide range of performance requirements
   and ambient conditions.