Autel MaxiFlash VCMI Manual de usuario

1 Measurement

The Measurement application can provide all the features needed for performing

electrical and electronic circuit tests as well as monitoring signal activities on today’s

vehicles.

After properly connecting with a test vehicle and communicating with MaxiSys Ultra,

the VCMI (Vehicle Communication and Measurement Interface) is used as an

integrated device that functions as an oscilloscope, a waveform generator, a

multimeter and a digital OBDII breakout box.

1.1 Oscilloscope

An oscilloscope is a measuring instrument that shows how a signal varies with time

in a graphical way. Various signal activities can be displayed and monitored on a

two-dimensional grid. The graphical form created by a signal is called a waveform.

The voltage-time characteristic of the signal or waveform is drawn as a visual line

called the trace.

1.1.1 Safety Information

Follow these instructions below to reduce the risk of injury from electric shock and

prevent equipment damage.

A. Maximum input ranges

Observe all terminal ratings and warnings marked on the product.

DANGER:

To prevent electric shock, take all necessary safety precautions when

working on equipment where voltages beyond the specified input range may

exists. Contact with voltages outside of the specified measuring range

presents a risk of electric shock.

To prevent injury or death, the oscilloscope must not be directly connected to

the battery. To measure battery voltages, use a differential isolating probe

specifically rated for battery use.

WARNING:

Operation outside of the safe input range is likely to cause permanent

damage to the oscilloscope and other connected equipment.

B. Grounding

DANGER:

The scope’s ground connection through the USB cable is for measurement

purposes only. The oscilloscope does not have a protective safety ground.

Do not connect the ground input (chassis) to any electrical power source. To

prevent personal injury or death, use a voltmeter to check that there is no

significant AC or DC voltage between the oscilloscope ground and the point

to which you intend to connect the ground input.

WARNING:

Applying a voltage to the ground input is likely to cause permanent damage

to the oscilloscope, the attached computer, and other equipment.

To prevent measurement errors caused by poor grounding, always use the

high-quality USB cable supplied with the oscilloscope or Wi-Fi connection.

C. External connections

DANGER:

To prevent injury or death, use only the power cord and adaptor supplied

with the product.

D. Environment

DANGER:

To prevent injury or death, do not use the product in wet or damp conditions,

or around explosive gas or vapor.

WARNING:

To prevent damage, always use and store your oscilloscope in appropriate

environments.

E. Product Maintenance

The product contains no user-repairable parts. Repair, servicing and calibration

require specialized test equipment and must be performed by Autel Tech Support

or an approved service provider.

DANGER:

To prevent injury or death, do not use the product if it appears to be

damaged in any way. Stop using the product when any abnormal operations

occur.

WARNING:

Do not tamper with or disassemble the oscilloscope, connectors or

accessories. Internal damage will affect performance.

Do not block any of the instrument’s air vents to avoid damage caused by

overheating.

When cleaning the oscilloscope, use wet soft cloth with mild detergent in

water. Do not allow water to enter the oscilloscope casing.

1.1.2 General Introduction

1.1.2.1 Component Locations

The input channels are located at the bottom of the VCMI device and are

compatible with many test leads and probes.

VCMI Bottom View

1. Ethernet Connector –Connects to RJ45 Network Cable

2. Vehicle Data Connector –Connects to the vehicle DLC using the provided Main

Cable.

3. Input Channel A

4. Input Channel B

5. Input Channel C

6. Input Channel D

The oscilloscope LED is located on the front panel of the VCMI device. When the

VCMI is properly connected and powered on, the oscilloscope LED flashes green

when operating in the oscilloscope mode.

VCMI Front View

1. Power LED

2. Battery LED

3. Waveform Generator LED

4. Multimeter LED

5. Oscilloscope LED

6. Vehicle LED

1.1.2.2 Technical Specifications

Table 1-1 Technical Specifications

Item

Description

Channels

Bandwidth

20MHz

Item

Description

Maximum Sample Rate

1 or 2 channels: 80MS/s*

3 or 4 channels: 20MS/s*

MS/s = mega samples per second

1) Select arbitrary one channel, the

maximum sample rate is 80MS/s.

2) Select two channels (AC, BC, AD, or BD),

the maximum sample rate is also 80MS/s.

3) Select two channels (AB/CD) or more

than three channels, the maximum sample

rate is 20MS/s.

Input Ranges (Full Scale)

±50 mV to ±200V

Sensitivity

10 mV/div to 40V/div

Input Coupling

AC/DC

Input Impedance

1MΩ in parallel with 25pF

Vertical Resolution

12 bits

Buffer Memory

32M samples shared among active

channels

Time Base Ranges

100ns/div to 1000s/div

Connection

USB 2.0



Wi-Fi

Max. Wi-Fi Transmission

Distance

Up to 98ft

DC Accuracy

±1% of full scale

Storage Humidity Range

5 to 95%RH, non-condensing

1.1.2.3 Accessories

Autel USB Cable V2 (the V2 icon can be seen on the

cable) (SA001)

Connects the oscilloscope to the tablet to ensure reliable

signal transmission.

Secondary Ignition Pickup (SA273)

The BNC connector is connected to the oscilloscope to

measure the secondary ignition voltage of conventional

ignition systems and most HEI (High Energy Ignition) and DIS

(Distributorless Ignition) systems.

Scope Test Lead

(Red: SA005, Green: SA006, Blue: SA007, Yellow: SA008)

The BNC connector is connected to the oscilloscope, and the

4mm banana plug is connected to various probes.

Breakout Lead (SA151)

Enables easy access to existing automotive wiring harness

connectors for obtaining signals of various sensors. Four

sizes are available: 0.6 mm, 1.5 mm, 2.3 mm and 2.8 mm.

Flexible Back-pinning Probe (Red: SA053, Black: SA054)

Designed for back-probing under the insulation of multi-plug

terminals to detect the signal of the test component. The

flexible part can be bent and access to difficult areas. The

probe tip is not replaceable.

Back-pinning Probe Set (SA051)

Designed for back-probing under the insulation of plugs to

pick up the signal of the test component. The probe tip is

replaceable.

Multimeter Probe (Red: SA055, Black: SA056)

Designed for connecting exposed wires or terminals.

Small Crocodile Clips (Red: SA057, Black: SA058)

Used to connect exposed wires or terminals. SA059 (red) and

SA060 (black) for larger terminals.

Large Dolphin Clips (Red: SA059, Black: SA060)

Used to connect exposed wires or terminals, including battery

terminals. SA057 (red) and SA058 (black) for smaller

terminals.

Attenuators 20:1 (SA020)

Passive 20:1 attenuator, can output 1V when inputting a 20V

signal.

Battery Clip (Optional) (Red: SA061, Black: SA062)

Dedicated to connecting car battery terminals.

65A AC/DC Current Clamp (Optional) (SA253)

Used to measure AC or DC currents up to 65A. Two scales

are available: 1mV/10mA for 10mA to 20A, 1mV/100mA for

10mA to 65A.

650A AC/DC Current Clamp (Optional) (SA256)

Used to measure AC or DC currents up to 650A. Two scales

are available: 1mV/100mA for 100mA to 200A, 1mV/1A for

100mA to 650A.

Coil On Plug (COP) Probe (Optional) (SA271)

Used with the oscilloscope to measure the secondary ignition

voltage of COP.

HT Extension Lead (Optional) (SA275)

Fit the HT extension leads between the coil pack and the

plugs of the independent ignition system (COP), and then

place the (SA273) secondary ignition pickup on each lead to

obtain the secondary ignition voltage.

1.1.3 Getting Started

Before opening the Oscilloscope application, the VCMI device must be connected

to the tablet via the provided USB cable or Wi-Fi network.

Figure 1-1 Sample Connection Diagram

To open the oscilloscope application

1. Insert the applicable test lead or probe terminal ends into the input channel(s)

to complete the connection (refer to Figure 1-1).

2. Tap the Measurement icon on the Home screen of the MaxiSys Ultra Tablet.

The Measurement screen opens.

3. Tap the Oscilloscope icon to open the oscilloscope menu.

4. Select a desired testing option to continue.

NOTE

Please check the oscilloscope LED status indicator on the front panel of VCMI

device. The oscilloscope LED flashes green when operating in the oscilloscope

mode.

Message Prompt

A message showing “Are you sure to open the waveform of Demo mode?” displays

after tapping the Oscilloscope icon and opening the oscilloscope menu. Please tap

“OK” to enter the demo mode or tap “Cancel” to exit.

A message showing “Are you sure to open the waveform data?” also displays after

the tablet and the VCMI connect successfully. Please tap “OK” to display the actual

waveform or tap “Cancel” to exit.

1.1.4 Oscilloscope Update

The operating software of the oscilloscope is continually optimized. Tap the Help

button in the upper half of the screen to update.

Before update the oscilloscope software, please make sure the tablet has a stable

Internet connection.

1.1.4.1 APK Update

NOTE

The acronym APK (Android Package Kit) is used on the tablet and in this manual.

This file contains all the assets of a particular app. To update the APK, is to install

the latest version of the app on your tablet.

To update the APK

1. Tap the Help button on the upper half of the screen. A dropdown menu

displays.

Figure 1-2 Sample Help Screen

2. Tap the Update the APK in the dropdown menu. A confirmation message

displays.

Figure 1-3 Sample Update Confirmation Screen

3. Tap OK to update the software or tap Cancel to exit.

1.1.4.2 Firmware Update

To update the firmware

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