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MODIS Edge Training Module 9

Applies To: MODIS Edge™
Overview:

Meters: Graphing Multimeter, Setup Tools, Scope Functions

Resolution:

VIDEO TRANSCRIPTION

Welcome to Snap-on Training Solutions. This module is designed to help you get the most out of your MODIS EDGE diagnostic tool, and covers the use of the graphing multimeter and lab scope.

Graphing Multimeter

The graphing multimeter and lab scope are powerful diagnostic tools that give you the ability to directly test vehicle components to verify faulty components before replacement.

To avoid damaging the meter, never attempt to measure more than the meter’s rated capacity.

MODIS Edge home screen with Scope Multimeter highlighted

To get started, select the Scope Multimeter icon from the Home Screen.

Scope / Multimeter - Profile

Select Graphing Multimeter to measure or monitor a signal to see how its value changes over time.

Graphing Multimeter 1

Graphing Multimeter 2

Graphing Multimeter 3

Graphing Multimeter 4

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.

Meter leads

Most of these tests can be made with the standard leads included with the tool.

Accessories

Here are some optional probes available for specialized tests to detect glitches in pressure, vacuum and temperature in automotive applications.

Accessories

Current measurements require the optional precision low amp probe. This is especially useful for finding parasitic loads, faulty injectors, pumps and relays. Contact your Snap-on representative to learn more.

Graphing Multimeter, Volts DC

Let’s select Volts DC to graph voltage change over time.

Graph with flat line

Here a constant voltage signal appears as a flat line, with no variation or glitches over time.

Graph showing glitch

We can easily capture glitches and dropouts to detect wiring issues, failing components and intermittent problems. The meter continuously records up to 262 screens of data for review. This makes it easy to perform a road test or a wiggle test without having to watch the meter.

Pressing the pause/stop icon freezes the data recording so you can review it.

Use the double arrows icons to scroll one screen at a time. 

Use the single arrows icons to scroll one data point at a time.

Or slide this scroll bar forward and back to quickly access all recorded data.

Setup Tools

Customize the meter display with these setup tools. The profile icons choose which channels to display.

Touch once to hide a channel. And again to display it.

To move a channel up or down the scale, touch and drag the channel marker up or down.

With more than one channel activated, the graphing meter or the scope can show relationships between component functions like these two Wheel Speed Sensor signals. Or compare two similar components to detect one that is failing.

The probe icon is used to select the device being used to sample the signal. Options are: test lead- volts DC, vacuum, pressure, amps, and more.

Scope Functions

6 Million Data Samples per Second

At six million data samples per second, the Snap-on scope function can capture many more samples than displayed on most standard display screens.

To take advantage of this capability select the peak detect function. The scope samples at the maximum rate possible and captures extremely fast peaks and glitches, like this ignition spike.

Coupling AC subtracts the average value of a signal so that small variations display prominently on the waveform. 

This blocks the DC portion of the signal to amplify the AC signal without driving the waveform off of the screen. Simply touch the coupling AC icon to activate.

The Scope Trigger sets a threshold value that initiates the waveform display. When the voltage passes the threshold value, a new waveform begins. This produces a very stable waveform that does not flicker or drift.

Touch the trigger icon to trigger when the voltage rises to the threshold value. Touch the icon again to trigger when falls to the threshold value.

The trigger point appears as a plus sign on the display. Touch and drag the plus sign to position it.

Or touch the large plus sign on the control panel to use the four-way control for a more precise setting. Easily change the time scaler sweep by using the sweep menu. 

You can set the total time it takes for the data to fill the screen, anywhere from 1 to 20 seconds in meter mode and as short as fifty microseconds in lab scope mode.

Touch the scale value to change it anytime with this popup menu. After making a menu selection simply touch a blank spot on the screen to hide the menu.

The graphing meter also track the minimum and maximum recorded values.

Selecting the refresh icon to clear these values and the tracking starts over.

To see more detail at any time, touch the full screen arrow to hide the control settings and expand the graphing display.

Touch it again to show the control panel.

To learn more about Graphing Multimeter and Lab Scope functions and settings refer to the MODIS Edge user manual.

 

Last Updated: June 11, 2019

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