Or compare two similar components to detect one that is failing. With two channels activated, the graphing meter or the scope can show relationships between component functions like these two oxygen sensor signals.
To move a channel up or down the scale for easier viewing, touch channel marker and slide up or down. Touch once to display a channel, and again to hide it. The profile icons choose which channels to display. Or slide this scroll bar forward and back to quickly access all recorded data.Ĭustomize the meter display with these setup tools. Use the single arrow icons to scroll one data point at a time. Use the double arrow icons to scroll one screen at a time. Pressing the red stop icon freezes the data recording so you can review it. This makes it easy to perform a road test or a wiggle test without having to watch the meter. The meter continuously records up to 262 screens of data for review. We can easily capture glitches and dropouts to detect wiring issues, failing components and intermittent problems. Here a constant voltage signal appears as a flat line, with no variation or glitches over time. Let’s select volts DC to graph voltage change over time. Contact your Snap-on Franchisee to add these handy accessories to your tool.
This is especially useful for finding parasitic loads, faulty injectors, pumps and relays. Current measurements require the optional precision low amp probe. Specialized scales for optional probes can accurately graph changes and glitches in pressure, vacuum and temperature in a wide variety of automotive applications. You can select from over twenty graphing meter tests and display options, including Dual Graphing Meter, Volts DC, Volts AC, Frequency, Pulse width, Duty cycle and Dwell. The graphing meter navigation shown here is similar for the lab scope, but the lab scope can capture very high speed signals with up to six million data samples per second. The Graphing meter is useful to see how a value changes over time, and can reveal how a component functions, or malfunctions under varying conditions. When the leads are separated, the four arrows indicate infinite ohms and an open circuit. The display will show zero ohms when the leads are connected together. Simply follow the onscreen calibration instructions. To perform an Ohm or amp measurement, the first step is to calibrate the meter to insure accurate results. This is most useful when the value is not rapidly changing. The digital meter displays a single value at a time. Most test connections are made with these meter leads. Never attempt to measure more than the meter’s rated capacity. The meter includes tools for a variety of automotive applications. Let’s select digital meter to explore the capabilities. The Scope Multimeter icon accesses the Lab scope, Graphing multimeter and Digital multimeter. In automotive applications this is typically the final step to verify a failed component with certainty before replacing it. The multimeter and lab scope are powerful diagnostic tools that give you the ability to display precision measurements of electrical signals.
This module is designed to help you get the most out of your MODIS Ultra diagnostic tool, and covers the use of the digital and graphing meter and lab scope.
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