Milliohm Measurements using the Pico PQ326
The Pico Milliohm tester is a
standalone meter, independent from an oscilloscope and with independent software.
The tool features precise accessories such as the Kelvin clamps and live
temperature compensated milliohm readings to bring far greater detail and
precision than standard multi-meters. Alongside the proprietary, it allows for
graph-based analysis and the ability to view balancing and deviations of the
components. This enhanced detail makes it an essential tool for technicians to
find tears, inefficiencies, damage, and failures in electric vehicle
drivetrains and within general automotive components such as fuel pumps, A/C
motors, egr valves and more.
Electric driven vehicles use 3-phase
motors and the ability to test resistance between phases is crucial to seeing
the health of a motor with Realtime Temperature calculation. The Pico Milliohm
tester tests all 3 phases of a motor generator at once in under a minute,
drastically lowering diagnostic time, and can then print, save and send these
software results. The resistance
measurement graphed overtime is far more precise and cuts diagnosis time down
compared to a standard multi-meter. Particularly, Phase balancing is an
essential diagnostic test as deviations beyond 1% or beyond manufactured
specifications can potentially damage components. These variants in the circuit
draws greater amperage, generating mass heat and friction and eventually can
lead to component failure. With a graphical display, this information visible,
as changes under time periods and varying conditions can project these
symptoms. This makes a Milliohm tester the tool to accurately diagnose these
drivetrains.
Beyond the specialised
application for Electric drivetrains, the Pico Milliohm tester can find
accurate failures in all other general electrical wiring such as high speed Can
networks. The precise data packets sent from modules are sensitive and easily
corrupted from loose terminals, weak connections, minor tears/fraying and
broken insulation which can be detected by graphing resistance over time. The varying
resistance across screwing bolts that are torqued to specification, can be
measured easily with the quality Pico Milliohm tester. When high voltage
current flow passes through these components, incorrect torque and poor contact
will generate heat, potentially damaging the related components. Using this
data displayed graphically, then allows for testing underneath time periods and
vibrational conditions. Allowing a technician to test weld contacts, grounding
points, and other electrical components with far greater detail. Compared to a
standard Multi-meter, the software and the hardware of the Pico milliohm tester allows for technicians to extract and
record quality data and more accurately diagnose electrical symptoms.