Launch Em101n New Energy Oscillograph Multimeter User Manual

EM101N New Energy Oscillograph Multimeter

Product Information

Disclaimer

All information, illustrations, and specifications in this
manual are based on the latest information available at the time of
publication. The right is reserved to make changes at any time
without notice. We shall not be liable for any direct, special,
incidental, indirect damages or any economic consequential damages
(including the loss of profits) due to the use of the document.

Product Usage Instructions

WARNING

Study, understand and follow all instructions provided with this
product. Read these instructions carefully before installing,
operating, servicing or repairing this tool. Keep these
instructions in a safe, accessible place.

Caution: To help prevent personal injury, follow the
instructions below.

• Handle the device carefully. Do not drop, bend, puncture,
  insert foreign objects, or place heavy objects on the device. The
  fragile components inside the unit may be damaged.
• Connect and disconnect properly. Do not connect or disconnect
  probes or test leads while they are connected to a voltage
  source.
• Observe all terminal ratings. To avoid fire or shock hazard,
  observe all ratings and markings on the product. Consult the
  product manual for further ratings information before making
  connections to the product.
• Use proper probe. To avoid shock hazard, use a properly rated
  probe for your measurement.
• Avoid circuit or wire exposure. Do not touch exposed
  connections and components when power is on.
• Do not operate if the unit is, or suspected to be damaged. If
  suspected damage occurs with the device, have it inspected by
  qualified service personnel before further operations.
• Do not operate in wet/damp conditions.
• Do not operate in an explosive atmosphere.
• Keep product surfaces clean and dry.
• Do not disassemble or refit the device. The device is a sealed
  device and there are no end-user serviceable parts inside. All
  internal repairs must be carried out by authorized maintenance
  agencies or authorized technicians. Attempts to disassemble or
  refit the device will void the warranty.
• Do not try to replace the internal battery. The internal
  rechargeable battery must be replaced by authorized maintenance
  agencies or authorized technicians.

FCC Statement

Any changes or modifications not expressly approved by the party
responsible for compliance could void the user’s authority to
operate the equipment.

This device complies with part 15 of the FCC Rules. Operation is
subject to the following two conditions: (1) This device may not
cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause
undesired operation.

Version number: V1.00.000 Revised date: 2022-10-28

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EM101N New Energy Oscillograph Multimeter User Manual

Trademarks
LAUNCH is a registered trademark of LAUNCH TECH CO., LTD. in China and other countries. All other marks are trademarks or registered trademarks of their respective holders.
Copyright Information
Copyright © 2021 by LAUNCH TECH CO., LTD. (also called LAUNCH for short). All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying and recording or otherwise, without the prior written permission.
Statement: LAUNCH owns the complete intellectual property rights for the software used by this product. For any reverse engineering or cracking actions against the software, LAUNCH will block the use of this product and reserve the right to pursue their legal liabilities.
Disclaimer of Warranties and Limitation of Liabilities
All information, illustrations, and specifications in this manual are based on the latest information available at the time of publication. The right is reserved to make changes at any time without notice. We shall not be liable for any direct, special, incidental, indirect damages or any economic consequential damages (including the loss of profits) due to the use of the document.

LAUNCH

EM101N New Energy Oscillograph Multimeter User Manual

WARNING
Study, understand and follow all instructions provided with this product. Read these instructions carefully before installing, operating, servicing or repairing this tool. Keep these instructions in a safe, accessible place.
Caution: To help prevent personal injury, follow the instructions below.
Handle device carefully. Do not drop, bend, puncture, insert foreign objects, or place heavy objects on the device. The fragile components inside the unit may be damaged.
Connect and disconnect properly. Do not connect or disconnect probes or test leads while they are connected to a voltage source.
Observe all terminal ratings. To avoid fire or shock hazard, observe all ratings and markings on the product. Consult the product manual for further ratings information before making connections to the product.
Use proper probe. To avoid shock hazard, use a properly rated probe for your measurement. Avoid circuit or wire exposure. Do not touch exposed connections and components when
power is on. Do not operate if the unit is, or suspected to be damaged. If suspected damage occurs with
the device, have it inspected by qualified service personnel before further operations. Do not operate in wet/damp conditions. Do not operate in an explosive atmosphere. Keep product surfaces clean and dry. Do not disassemble or refit the device. The device is a sealed device and there are no
end-user serviceable parts inside. All internal repairs must be carried out by authorized maintenance agencies or authorized technicians. Attempts to disassemble or refit the device will void the warranty. Do not try to replace the internal battery. The internal rechargeable battery must be replaced by authorized maintenance agencies or authorized technicians.
FCC STATEMENT
Any Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy, and if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
– Reorient or relocate the receiving antenna.
– Increase the separation between the equipment and receiver.

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EM101N New Energy Oscillograph Multimeter User Manual

– Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. – Consult the dealer or an experienced radio/TV technician for help.
– This equipm ent com plies with FCC radiation exposure lim its set forth for an uncontrolled
environm ent. This equipm ent should be installed and operated with m inim um distance 20cm between the radiator & your body.

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CONTENTS
1 Overview…………………………………………………………………………………………………………………………..1 1.1 Product Profile………………………………………………………………………………………………………………1 1.2 Accessories Included……………………………………………………………………………………………………..1 1.3 Technical Parameters…………………………………………………………………………………………………….2
2 Component and Controls …………………………………………………………………………………………………..4
3 Oscilloscope Operations ……………………………………………………………………………………………………6 3.1 Initial Use …………………………………………………………………………………………………………………….6 3.1.1 Getting Started………………………………………………………………………………………………………..6 3.1.2 Automatic Calibration ……………………………………………………………………………………………….8 3.1.3 Connection …………………………………………………………………………………………………………….9 3.2 Operations …………………………………………………………………………………………………………………11 3.2.1 Channel Selection…………………………………………………………………………………………………. 11 3.2.2 Channel Attributes & Trigger Setting…………………………………………………………………………. 11 3.2.3 Auto-Set………………………………………………………………………………………………………………. 13 3.2.4 Menu Operations …………………………………………………………………………………………………..13 3.2.5 Car Test Operations ……………………………………………………………………………………………….17 3.2.6 Cursor Measurement ……………………………………………………………………………………………..17 3.2.7 Quick Save …………………………………………………………………………………………………………..18 3.2.8 REF (reference) Waveform ……………………………………………………………………………………..18
4 Multimeter Operations ……………………………………………………………………………………………………..19 4.1 Operations …………………………………………………………………………………………………………………19 4.1.1 Voltage Measurement …………………………………………………………………………………………….19 4.1.2 Current Measurement …………………………………………………………………………………………….20 4.1.3 Resistance Measurement ……………………………………………………………………………………….20 4.1.4 Diode Measurement……………………………………………………………………………………………….21 4.1.5 Make-and-break Measurement ………………………………………………………………………………..22 4.2 Test Example …………………………………………………………………………………………………………….. 22 4.3 Attention…………………………………………………………………………………………………………………….23
5 Care & Maintenance…………………………………………………………………………………………………………24

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1 Overview

1.1 Product Profile
This EM101N is composed of hardware and software. Hardware includes EM101N module and connection wire. The Oscilloscope and Multimeter APP are installed on diagnostic tool. Automotive oscilloscopes assist the auto repair technician with the ability to quickly identify faults on automotive electronic equipment and wiring. The oscilloscope sweep speed is far greater than the signal frequency of such vehicles, usually 5-10 times of the measured signal and quickly acquire the circuit signal while slowly displaying the waveform for observation and analysis. The built-in multimeter provides simple measurements to test voltage, current and resistance to help determine faults.
1.2 Accessories Included
Common accessories are same, but for different destinations, the accessories may vary. Please consult from the seller or check the package list supplied with this tool together.

No.

Name

Description

1

EM101N

2

BNC to 4mm test leads

Dedicated cable used to connect sensor and EM101N to test all types of vehicle signals.

3

Multimeter test pen (black + red)

Connect to COM and V/ terminal of the sensor module when using multimeter.

Multimeter probes (black +

4

red)

The multimeter probes offer a quick and easy solution,

where a permanent connection is not required. The 4 mm

socket in the handle of the probe connects straight into

the BNC to 4mm test leads.

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5

Crocodile clips

Designed to connect the bare terminals or leads.

6

Back probe pins suite

Used to connect sensor and BNC to 4mm Test Leads, and can easily pierce the insulation of wires to allow for automotive electrical measurements without causing damage to the wires. Additionally, they can be used as pin-tip probes while working with small circuit boards.

7

Type A-Type B USB cable Used to connect EM101N and diagnostic tool, sending

signal acquired by EM101N to diagnostics tool to display

waveform.

8

Power adaptor

9

User manual

1.3 Technical Parameters
1. When used as Oscilloscope Name
Channels Bandwidth Max. sample rate Timebase Acquisition mode Storage depth Coupling

Used to charge the EM101N with included USB cable.
Descriptions 2 10MHz 50MHz/s 200ns/div~10s/div Normal sampling 240KB (for two channels) DC, AC

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Input impedance Vertical scale Sample bit Max. input voltage Probe attenuation coefficient Trigger type Trigger mode Auto measurement items 2. When used as Multimeter
Name DC Voltage AC voltage DC current
AC current
Resistance Diode Make-and-break detection

EM101N New Energy Oscillograph Multimeter User Manual
1M±2%, 15pF±5pF parallel 10mV/div~10V/div 8 bits 40V peak value (DC + AC peak value) 1X, 10X,100X (need probe support) Edge Auto, Single Peak value, average value, max value, min value, frequency, cycle
Descriptions Automatic range, measurement range: ±600V Automatic range, measurement range: ±600V Automatic range, measurement range: ±10A (external sensor should be connected for large range current). Automatic range, measurement range: ±10A. Average value measurement (external sensor should be connected for large range current). Automatic range, measurement range: 0~60M 0V~2.0V Make a sound when below 50

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2 Component and Controls

Number

Name

Description

1

Fuse

2* A

10A current input port

3* mAA

mA/ 400mA current input port

4* COM

Negative public port

5* V/

Voltage/resistance input terminal

* Note: The ports listed above are measurement ports for multimeter.

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6

Handle

7

Power LED

8

State LED

9

Wireless LED

10 Indicator LED
11 CH1 12 CH2

13 I/O Port

14 Power button

EM101N New Energy Oscillograph Multimeter User Manual
Solid Green: Battery level normal. Sold Red: Charging. Red Flashes: Battery level low, indicating the battery level is
below 20%. Solid Green: Working normally. Red Flashes: Working abnormally. Solid Green: Normally connected. Red Flashes: Connecting in progress. Not ON: Disconnected. Green Flashes: Wrong connection or poor contact. Solid Green: Working normally.
Channel 1 Channel 2 1. Charge the EM101N with power adaptor and USB cable. 2. Connect EM101N and diagnostic tool with USB cable to
transmit data. Note: The diagnostic tool is not able to provide power supply to EM101N. Please charge the EM101N properly.
Press to turn on/off the EM101N.

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3 Oscilloscope Operations
3.1 Initial Use
3.1.1 Getting Started Tap the Oscilloscope app icon and the following screen will appear:
Note: If no proper connection is made, no waveforms will be displayed on the screen and most functions become disabled.

No.

Description

Car Test

1

Provides all kinds of the testing applications on the automotive parts (including circuits, sensors, actuators,

ignition etc.).

Menu

Includes the following options:

· Measure: 6 parametric measurement items.

2

· Save: Save format and path of channel waveform. · Display: Set the display mode of the waveform.

· User Settings: Clear data, access oscilloscope settings and automatic calibration.

· About: Display the detailed information of the app.

Trigger

3

Use to setup trigger condition and trigger type.

Operation tips
Tap this button once to expand the submenu. Tap it again to fold the submenu.
Tap this button once to expand the submenu. Tap it again to fold the submenu. For detailed operations on the submenus, refer to section 4.4.

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4 Help

Check detailed operation instructions of application.

Trigger information of current channel 5 Readouts represent storage depth, sample rate and Displays working status.
trigger information respectively.

6

Horizontal trigger position marker

7 Level scale of the Channel 2

8 Edge trigger level marker

Tap

once – Turns on the

Channel 1 vertical settings panel

channel and sets it as the

9 Controls the amplitude of displayed signal. User can

current channel.

change Invert, coupling and probe attenuation coefficient.

Tap

twice – Calls out the

channel vertical settings.

Channel 2 vertical settings panel

10 Controls the amplitude of displayed signal. User can Tap

three times – Turns

change Invert, coupling and probe attenuation coefficient. off the channel.

Reference channel settings panel

11

Setup reference channel.

RUN/STOP/WAIT WAIT: All pre-triggered data has been acquired and
the EM101N is ready to accept a trigger. 12 STOP: The EM101N has stopped acquiring waveform
data. RUN: The EM101N is running.

13

Auto Automatically adjusts the vertical scale, horizontal scale

Tap this button to start auto setup function.

and trigger settings.

Single trigger 14 Capture one single trigger, complete acquisition, and
then stop.

Horizontal setting

15

Control the time base.

Quick save

16

Quickly saves the measured waveform of current channel.

To modify save path and file type, go into Menu -> Save.

17

Channel selection button

Tap this button once, the

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Tap it to select the target channel.

channel (only the channels that have been turned on) selection pop-up will appear. Tap it again to fold the submenu.

18 Connection status button

Tap this button to search and connect EM101N. It will display “Connected” when successfully connected.

/ Cursor position
Turn on/off the horizontal/vertical cursor measurement function. When set to ON, two horizontal/vertical 19 reference lines named with Y1 & Y2/X1 & X2 will be displayed on the waveform display area. The user can use / or / to fine tune the line or drag the line directly to move it.

Tap this button once to start the cursor calculation function. Tap it again to disable it.

/ or / Fine-tuning button 20
Fine tunes the vertical/horizontal reference line.

When the horizontal cursor is ON, the fine tuning buttons display and . If the vertical cursor is ON, the fine tuning buttons will change into
and .

21 Measurement value area

Go to Menu -> Measure to expand it.

22 Level scale of the Channel 1

If the marker is displayed as

Channel 2 marker

, it indicates the channel is

23

not the current channel. Tap the Shows the reference points of the displayed waveforms. marker , it will change into

If there is no marker, the channel is not displayed.

indicating the channel is the

current channel.

24 Waveform display area

Channel 1 marker
25 Shows the reference points of the displayed waveforms. Same with “Channel 2 marker.” If there is no marker, the channel is not displayed.

3.1.2 Automatic Calibration
The automatic calibration routine lets you optimize the oscilloscope signal path for maximum measurement accuracy. You can run the routine at any time but you should always run the routine if the ambient temperature changes by 10°C or more.
For accurate calibration, power on the EM101N and wait twenty minutes to ensure it is warmed up. Calibration mainly includes simulation channel calibration, trigger voltage of trigger circuit calibration and non-linear calibration of horizontal base line deviation.

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Note: During auto calibration, please make sure no signal in input terminal of CH1 / CH2, otherwise it may damage device.
Tap Menu -> User Settings, then tap Automatic Calibration.

Tap OK on the pop-up message box to start calibration. The LED on the EM101N starts flashing and the prompt message “Calibrating, please wait” will appear on the upper left corner of the screen.
Note: While calibrating, no operations are allowed to perform until the calibration process is successfully finished. The self-calibration routine takes several minutes. After calibration is complete, the prompt message “Correction successful” will pop up on the screen. Tap OK to complete automatic calibration. 3.1.3 Connection Testing Sensor: 1. Connect the BNC connector of the BNC to 4mm test lead to the CH1/CH2 (select number of channel
and channel No. according to actual situations), and plug the black (GND) and red (SIGNAL) 4mm connectors into the Black (GND) and other color (SIGNAL) banana sockets of the 6-way breakout leads (optional) respectively.
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2. Connect the black terminal and signal wire (its other end connected to the red 4mm connector) of the 6-way breakout lead to the GND and signal terminal of the vehicle sensor.

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3.2 Operations
3.2.1 Channel Selection A total of 3 channels are available: CH1, CH2 and REF (reference channel). Follow the methods to select a channel: A. Tap the channel tab shown on the right edge of the screen.

B. Tap

to select the target channel. This method is only applicable to the channel that is turned on.

Note: For better comparison and identification, each channel and waveform is marked in different color.

The EM101N can display multiple waveforms simultaneously, but only one waveform is allowed to display at top. The top channel is called current channel displayed as .

3.2.2 Channel Attributes & Trigger Setting

Channel attributes can be set via horizontal settings and vertical settings.

1. Horizontal Settings

User can change the horizontal time/division scale by tapping

or

time/division value from the pull-down list.

directly or by tapping the

If the waveform acquisition is stopped, the time/division selector ( / ) expands or compresses the waveform.
2. Vertical Setup This option allows you to adjust vertical scale and position, and other channel setup. Each channel has one separate vertical menu, you can set individually. Tap the target channel to call out the vertical setting option.

Option descriptions: Menu

Comments/Settings 11

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Reversed Coupling mode
Probe type

This option will affect how channel is displayed. ON: Turn on the invert function. When Invert is set as On, voltage value of displayed wave is reversed (upside down). When using basic trigger, it is necessary to adjust the trigger level to keep waveform triggered steadily. OFF: Restore to the original display of the waveform.
Trigger coupling determines what part of the signal passes to the trigger circuit. AC and DC are included: DC: Both DC and AC current can pass through, and can be used to view waveform as low as 0Hz without large DC offset. AC: The DC signal of the tested signal is blocked, and only AC current is allowed to pass through, and can be used to view waveform with large DC offset.
Choose the probe attenuation coefficient. Attenuation coefficient changes the vertical ratio of EM101N so that the measurement results reflect the true voltage at the probe.

3. Trigger setting
The trigger determines when the Oscilloscope starts to acquire data and display a waveform. When a trigger is set up properly, it can convert unstable displays or blank screens into meaningful waveforms.
When the Oscilloscope starts to acquire a waveform, it collects enough data so that it can draw the waveform to the left of the trigger point. The Oscilloscope continues to acquire data while waiting for the trigger condition to occur. After it detects a trigger, the Oscilloscope continues to acquire enough data so that it can draw the waveform to the right of the trigger point.
Trigger indicates when a certain waveform meets the conditions that are predefined according to the requirements, the Oscilloscope presents the acquired data on the screen.
Go to Trigger, the following screen will appear:

The EM101N applies edge trigger, which is the most commonly used and effective trigger method. A clear majority of applications apply this trigger method to trigger waveform. An edge trigger determines whether the Oscilloscope finds the trigger point on the rising/falling/dual edge of a signal. When the
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tested signal voltage direction is consistent with preset direction, and the value reaches trigger voltage, the EM101N will be triggered and capture waveform.

Menu Source
Trigger

Comments/Settings
Select channel source of triggered signal.
Level: The electrical level that signals shall exceed when capturing waveform. Rise: Trigger on rising edge. Drop: Trigger on falling edge. Close: Turning off trigger mode.

In this mode, the user can set the trigger level by directly dragging the Level scroll bar or the icon on the right side of the waveform display area.
3.2.3 Auto-Set The Oscilloscope has an auto-set feature that sets up the Oscilloscope automatically to display the input signal in a best fit. Tap Auto, the EM101N may change the current settings to display the signal. It automatically adjusts the vertical and horizontal scaling, as well as the trigger coupling and position.
3.2.4 Menu Operations 1. Measure The EM101N provides 6 parametric auto measurements. Tap Measure and the following screen will appear: Tap to select the desired measurement item. All selected items will be shown on the left side of the Clear button.

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Tap it to remove the measurement item. The values corresponding to the selected items will be displayed on the bottom of the screen.

Parameter type Cycle
Frequency Peak value Max value
Min value AVG value

Description
Time for the first signal cycle to complete in the waveform.
Reciprocal of the period of the first cycle in the waveform.
Peak-to-peak = Max-Min, measured over the entire waveform.
Voltage of the absolute maximum level, measured over the entire waveform.
Voltage of the absolute minimum level, measured over the entire waveform. The arithmetic mean over the entire waveform.

The following illustrations explain some common measurement items for your reference.

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Tap Clear to turn off all measurement items. 2. Save This function allows you to save the waveforms of the channels. Tap Save and the following screen will appear:

Select the desired measurement channel, select file type (.WAV or .CSV), tap the default file name to change the file name and select save. Alternatively, the user can save the waveform files to the designated folder (R1, R2). If the files are saved under this folder, the user can recall the saved files for reference and play back through REF channel. 3. Display This function enables you to setup waveform brightness and coordinate axis display level. Coordinate axis comes with Full, Grid, Crosshairs and Frame. Tap Display and the following screen will appear:
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4. User Settings This option provides access to data clearing, waveform display, auto calibration and oscilloscope parameter save and recovery. Tap User Settings and the following screen will appear:
Item description: Clear Data: Clear saved data and user setup. Oscilloscope settings: User can save system setup parameter using Save function. Restore function can enable user to use system setup saved previously to avoid repeated setup. Automatic calibration: The self-calibration routine lets you optimize the oscilloscope signal path for maximum measurement accuracy. Refer to section 3.1.2 for detailed operations. 5. About Displays basic information of the APP.
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3.2.5 Car Test Operations This function provides all kinds of the testing applications on the automotive parts (including circuits, sensors, actuators, ignition etc.) and detailed connection methods. Tap Car test and the following screen will appear:

Tap to select the desired automotive part, the system will automatically configure the option to the preset parameters. The user does not need to make any settings. Just follow the on-screen instructions to make connections and proceed. 3.2.6 Cursor Measurement The Cursor function can be used for assisting in measurement. Tap / to turn on the cursor function and place the cursor on the measurement point to read the waveform measurement value. There are two types of cursors: horizontal cursor and vertical cursor. The horizontal cursor measures the value in the vertical direction, and the vertical cursor can measure the value in the horizontal direction. When set to ON, two horizontal/vertical reference lines named with Y1 & Y2/X1 & X2 will be displayed on the waveform display area. The user can use / or / to fine tune the line or drag the line directly to move it. Tap / again to turn it off.
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Note: Reading: indicates the difference between the two cursor positions. The voltage reading after Y1, Y2: indicates the position of the activated cursor in the horizontal cursor relative to the zero level. The time reading after X1, X2: indicates the position of the activated cursor in the vertical cursor relative to the trigger point. 1/X: Frequency. 3.2.7 Quick Save This function is used to quickly save the currently running measurement waveform. The EM101N can save waveform of analog channel or mathematical channel to the local. Saved file format can be WAV or CSV. EM101N has two reference channels. WAV file can be uploaded to reference channel for waveform reference. Relevant setup can be found in “Menu”. 3.2.8 REF (reference) Waveform EM101N has reference channel to display reference waveform. User can upload previously saved WAV file to reference channel and compare it with actual waveform to identify difference.
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4 Multimeter Operations
Multimeter is mainly used to test voltage, current, resistance, diode and Make-and-break. The unit will determine if the device is operating normally, a fault is detected and if the circuit is complete.
4.1 Operations
1. First connect the EM101N to power supply.

2. Connection method varies with tested object. Please refer to the following method to test:
4.1.1 Voltage Measurement DC voltage and AC voltage measurement apply the same connection method. 1. Tap Toolbox -> Multimeter on the diagnostic tool to enter the following screen.

2. Select DC voltage/AC voltage and corresponding range. Tap Not connected to search for EM101N. When it is successfully connected, the diagnostic tool will display connection status.
3. Insert one end of black test pen into COM terminal of EM101N, insert one end of red test pen into V/ terminal of EM101N.
4. Attach black and red test pen tip to tested point. Keep test pen attached to it firmly.
Option descriptions:

Menu Numerical waveform mode Numerical mode
Waveform mode

Comments/Settings Displays the measurement result in both numerical and waveform form. Displays the measurement result in numerical form. Displays the measurement result in waveform form.

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Open waveform Save waveform

Open saved waveform file. Save measurement result as a waveform file.

5. Tap Start, a numerical value will be displayed directly on the diagnostic tool. Warning: the tip of the test pen is metal, do not touch it with hands during measurement, otherwise it might
cause electricity shock and affect measurement results.
4.1.2 Current Measurement DC current and AC current measurement apply the same connection method. 1. Tap Toolbox -> Multimeter on the diagnostic tool to enter the following screen.

2. Select DC current/AC current and corresponding range. Tap Not connected to search for EM101N. When it is successfully connected, the diagnostic tool will display connection status.
3. Insert black test pen into COM terminal of EM101N. If measured current is above 400mA, insert red test pen into A terminal of EM101N. If measured current is below 400mA, insert red test pen into mAA terminal of EM101N.
4. Connect black and red test pen to tested point. Keep test pen attached to it firmly. 5. Tap Start, numerical value will be displayed directly on diagnostic tool. 4.1.3 Resistance Measurement 1. Tap Toolbox -> Multimeter on the diagnostic tool to enter the following screen.
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2. Select Resistance, tap Not connected to search for EM101N. When it is successfully connected, the diagnostic tool will display connection status.
3. Insert black test pen into COM terminal of EM101N, insert red test pen into V/ terminal of EM101N. 4. Attach black and red test pen to metal part of resistance ends. Keep test pen firmly attached to
resistance. 5. Numerical value will be displayed directly on the diagnostic tool.
Note: You can touch resistance with hands during measurement, but do not touch both ends of resistance simultaneously, as it will affect measurement accuracy. 4.1.4 Diode Measurement This EM101N can measure light-emitting diode and rectifier diode. The way test pen is placed is the same with voltage measurement. 1. Tap Toolbox -> Multimeter on the diagnostic tool to enter. 2. Select Diode, tap Not connected to search for EM101N. When it is successfully connected, the
diagnostic tool will display connection status.
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3. Insert black test pen into COM terminal of EM101N, insert red test pen into V/ terminal of EM101N. 4. Attach red test pen to positive end of diode, black test pen to negative end of diode. Keep test pen
firmly attached to diode. 5. Diode forward conduction current will be displayed directly on the diagnostic tool.
4.1.5 Make-and-break Measurement 1. Tap Toolbox -> Multimeter on the diagnostic tool to enter. 2. Select On/Off, tap Not connected to search for EM101N. When it is successfully connected, the
diagnostic tool will display connection status. 3. Insert black test pen into COM terminal of EM101N, insert red test pen into V/ terminal of EM101N. 4. Attach red and black test pen to tested point. 5. Readings will be displayed directly on the diagnostic tool.
4.2 Test Example
Knock sensor test (1) Detect knock sensor resistance Turn off the ignition switch, disconnect the knock sensor wire connector, and use Resistance to detect the resistance between the knock sensor wire terminal and the housing. The resistance should be (disconnected). If the resistance is 0 (connected), the knock sensor must be replaced. For the magnetostrictive knock sensor, “Resistance” can also be used to detect the coil resistance. The resistance should be consistent with the specified value (Refer to the service manual for the specific data). Otherwise, the knock sensor must be replaced.
(2) Check knock sensor output signal Remove the knock sensor plug. Use AC Voltage to check the voltage between the knock sensor wire terminal and ground when the engine is idling. There should be a pulse voltage output. If there is no voltage output, replace the knock sensor.
Cooling water temperature sensor test (1) Detect coolant temperature sensor resistance Check on the vehicle: Turn off the ignition switch, disconnect the coolant temperature sensor wire
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EM101N New Energy Oscillograph Multimeter User Manual

connector, and use Resistance to test the resistance between the two terminals of the sensor. Its resistance value is inversely proportional to the temperature (negative temperature coefficient) and should be less than 1k during warm-up.
Single piece check: disconnect the coolant temperature sensor wire connector, remove the sensor from the engine, place the sensor into the water in the beaker, heat the water in the beaker, and use Resistance to test the resistance between the two terminals of the sensor under different water temperature conditions. Compare the measured value with the standard value. If the standard value is not met, the coolant temperature sensor should be replaced.
(2) Detect coolant temperature sensor output signal voltage
Install the coolant temperature sensor, insert the sensor wire connector, turn on the ignition switch, and test the sensor output voltage signal between the two terminals of the coolant temperature sensor wire connector. The measured voltage value should vary inversely with the coolant temperature. When the coolant temperature sensor harness is disconnected and the ignition switch is on, the voltage should be about 5V.
4.3 Attention
1. Before usage, please reset APP value on the multimeter to zero.
2. The tip of the test pen is metal, do not touch it with hands during measurement, otherwise it might cause electric shock and affect measurement results.
3. Before test, please check measurement range and socket into which the test pen is inserted, perform test after checked with no error.
4. If it is unable to estimate measured value, choose max measurement range, and shift to suitable range based on measured results.
5. It is strictly forbidden to shift measurement range when measuring high voltage or large current, as it can cause electric arc to burn switch contact. If you want to change range, please disconnect metal contact tip first.
6. To avoid instrument damage, it is strictly forbidden to measure resistance when tested circuit is powered on.
7. When you want to measure DC current with multimeter, please reset it to zero first, then select suitable measurement range. Current varies in different modules, please refer to module mark to shift measurement range. During measurement, connect the multimeter in series, and measure circuit one by one. The bypass voltage can be disconnected. Please be aware that parallel connection of multimeter is forbidden, as it can cause multimeter damage and personnel injury.

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5 Care & Maintenance
General Care Do not store or leave the EM101N where the device will be exposed to direct sunlight for long periods of time.
Caution To avoid damages to the device or probes, do not expose them to sprays, liquids or solvents.
Cleaning Inspect the device and probes as often as operating conditions require. Make sure the device is disconnected from all power sources. To clean the exterior surface, perform the following steps: 1. Remove loose dust on the outside of the EM101N and probes with a lint-free cloth. Use care to avoid
scratching the clear glass display filter. 2. Use a soft cloth dampened with water to clean the device.
Caution To avoid damages to the surface of the device or probes, do not use any abrasive or chemical cleaning agents.

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Warranty
THIS WARRANTY IS EXPRESSLY LIMITED TO PERSONS WHO PURCHASE LAUNCH PRODUCTS FOR PURPOSES OF RESALE OR USE IN THE ORDINARY COURSE OF THE BUYER’S BUSINESS. LAUNCH electronic product is warranted against defects in materials and workmanship for one year from date of delivery to the user. This warranty does not cover any part that has been abused, altered, used for a purpose other than for which it was intended, or used in a manner inconsistent with instructions regarding use. The exclusive remedy for any automotive meter found to be defective is repair or replacement, and LAUNCH shall not be liable for any consequential or incidental damages. Final determination of defects shall be made by LAUNCH in accordance with procedures established by LAUNCH. No agent, employee, or representative of LAUNCH has any authority to bind LAUNCH to any affirmation, representation, or warranty concerning LAUNCH automotive meters, except as stated herein.
Disclaimer The above warranty is in lieu of any other warranty, expressed or implied, including any warranty of merchantability or fitness for a particular purpose.
Purchase Order Replaceable and optional parts can be ordered directly from your LAUNCH authorized tool supplier. Your order should include the following information:
Order quantity Part number Part name
Customer Service Any question during the operation, please call 86-755-84557891. If your unit requires repair service, return it to the manufacturer with a copy of the sales receipt and a note describing the problem. If the unit is determined to be in warranty, it will be repaired or replaced at no charge. If the unit is determined to be out of warranty, it will be repaired for a nominal service charge plus return freight. Send the unit pre-paid to:
Attn: Customer Service Department LAUNCH TECH CO., LTD. Launch Industrial Park, North of Wuhe Avenue, Banxuegang, Bantian, Longgang, Shenzhen, Guangdong P.R.China, 518129 Launch website: http://www. cnlaunch.com
http://www.x431.com
Statement: Launch reserves the rights to change the product design and specifications without prior notice. The appearance and color of the actual product may be different from those shown in the manual. Please refer to the actual product. We have tried our best to make all the descriptions in the manual accurate, but it is still inevitable that there are inadequacies. If you have any questions, please contact the dealer or Launch after-sales service center. We will not bear any consequences arising from misunderstanding

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References

• 元征
• X431