out of your VERUS® PRO diagnostic tool and covers the use of the digital and graphing

meter and lab scope. The multimeter and lab scope are powerful diagnostic tools that give

you the ability to directly test vehicle components. In automotive applications, this is typically

the final step to verify a failed component with certainty before replacing it. The Scope

Multimeter icon accesses the Lab scope, Graphing multimeter and Digital multimeter. Let's select

Digital Multimeter to explore the capabilities. The meter includes tools for a variety of

automotive applications. Never attempt to measure more than the meter's rated capacity.

Most test connections are made with these meter leads. One for positive and one for

negative. The digital multimeter displays a single value at a time. This is most useful

when the value is not rapidly changing. To perform an Ohm or amp measurement, the first

step is to calibrate the meter to insure accurate results. Tap Yes to confirm calibration. Select

OK. Simply follow the onscreen calibration instructions. The display will show zero ohms

when the leads are connected together. When the leads are separated, the four arrows indicate

infinite ohms and an open circuit. 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.

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.

You can select from eighteen graphing meter tests and display options, including 4 channel

Graphing Meter, Volts DC, Volts AC, Frequency, Pulse width, Duty cycle and Dwell. Specialized

scales for optional probes can accurately graph changes and glitches in pressure, vacuum

and temperature in a wide variety of automotive applications. 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 Franchisee to add these

handy accessories to your tool. Let's select Volts DC to graph voltage change over time.

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

over time. 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 arrow icons to scroll one screen at a time. Use the single arrow

icons to scroll one data point at a time. Or slide this scroll bar forward and back

to quickly access all recorded data. Customize the meter display with these setup

tools. The profile icons choose which channels to

display. Touch once to display a channel and again to hide it. To move a channel up or

down the scale for easier viewing, touch channel marker and slide up or down. With two channels

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 menu gives you control over the type of test used on

each channel, such as volts, dwell, pulse width, frequency, duty cycle, pressure, vacuum

and amps. 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.

Simply touch the Coupling AC icon to activate. This blocks the DC portion of the signal to

amplify the AC signal without driving the waveform off of the screen.

The scope trigger sets a new 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 above or below the threshold level. The trigger point appears as a plus

sign on the display. Touch and drag the plus sign to position it. Or touch Setup, Trigger

for a more precise setting. Easily change the time scale or sweep 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 Back to hide the drop down menu. The graphing meter also tracks the minimum

and maximum recorded values. Selecting the Refresh icon clears these values and the tracking

starts over. To see more detail at any time, touch the

Shrink Expand Icon to hide the control settings and expand the graphing display. Touch it

again to show the control settings. Snap-on is dedicated to helping you get the

most out of your diagnostic tool and keep your customers happy. Click here to watch

the next module in this Training Solutions series. And be sure to subscribe to our YouTube

channel, so you don't miss the next great product from Snap-on.