HELLA GUTMANN MT-HV Solutions Instruction Manual
- June 4, 2024
- HELLA GUTMANN
Table of Contents
HELLA GUTMANN MT-HV Solutions
About these Operating Instructions
The operating instructions comprise the most important information in a clearly visible form to facilitate the start with the MT-HV.
Notes about the Use of these Operating Instructions
These operating instructions contain important information relevant to
operator safety.
Go to www.hella-gutmann.com/manuals to find
all the manuals, instructions, references and lists about our diagnostic
devices, tools and much more.
Please also visit our Hella Academy under www.hella-academy.com and expand
your knowledge with various online tutorials and other training courses.
Please read the operating instructions entirely. Pay special attention to the
first pages containing the safety instructions. They are provided solely to
assure your safety when working with the product.
When working with the product, it is recommended to read the individual work
steps in the manual again to prevent hazard of persons and equipment or
operating errors.
The product shall be used exclusively by a qualified person. Information and
knowledge included in this training is not explained in these operating
instructions.
The manufacturer reserves the right to modify these instructions and the
product itself without prior notice. We therefore recommend checking it for
any updates. These operating instructions must accompany the product in case
of sale or any other transfer.
These operating instructions shall be kept for the entire service life of the
product and shall be accessible at any time.
Symbols Used
Marking of Text Parts
- | DANGER
Text parts marked in this way indicate an imminent dangerous situation, which will lead to death or severe injuries if not avoided.
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- | WARNING
Text parts marked in this way indicate a possibly dangerous situation, which may lead to death or severe injuries if not avoided.
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- | WARNING
Text parts marked in this way indicate a possibly dangerous situation, which may lead to death or severe injuries if not avoided.
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- |
This symbol indicates dangerous electric voltage/high voltage.
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- |
These symbols indicate rotating parts.
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- |
This symbol indicates the risk of crushing limbs.
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- |
This symbol indicates a potential injury of the hand.
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- |
This symbol indicates a potential chemical burn.
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- | NOTICE
All texts labeled IMPORTANT refer to a hazard in the device or environment. The advices or rather instructions stated here must therefore be observed by all means.
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- | NOTICE
Texts marked with NOTICE contain important and helpful information. It is recommended to observe these texts.
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| Crossed out waste bin
This symbol indicates that the product must not be discarded as domestic waste.
The bar underneath the waste bin symbol indicates that the product has been put on the market after 13 August 2005.
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- | Refer to manual
This marking indicates that the user manual must always be read and always be available.
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Symbols on the Product
Symbols on the Product
DANGER
Text parts marked in this way indicate an imminent dangerous situation, which
will lead to death or severe injuries if not avoided.
WARNING
Text parts marked in this way indicate a possibly dangerous situation, which
may lead to death or severe injuries if not avoided.
CAUTION
Text parts marked in this way indicate a possibly dangerous situation, which
may lead to minor or slight injuries if not avoided.
Refer to manual
This marking indicates that the user manual/the operating instructions must
always be read and
always be available.
Direct current voltage
This symbol indicates direct current voltage.
Direct current voltage means that the electrical voltage does not change
throughout a longer period of time.
Polarity
This symbol indicates a plus connection of a voltage source.
Ground connection
This symbol indicates a ground connection of a voltage source.
User Information
Safety precautions
General Safety Precautions
| All notes apply which are given in the individual sections of| |
- The MT-HV is exclusively intended for use on a vehicle. It is a precondition for the use of the MT-HV that the user has knowledge of automotive technology and is therefore aware of the sources of danger and risks in the workshop and on motor vehicles.
- An additional country-specific qualification is mandatory for performing high-voltage measurements.
- Please read the entire operating instructions thoroughly and, where necessary, the mega macs X user manual before using the MT-HV.
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the MT-HV operating instructions and in the user documentation of the mega macs X. All the symbols on the MT-HV and the following measures and safety precautions shall also be observed.
- Furthermore, pay attention to all general instructions from labour inspectorates, trade associations and vehicle manufacturers as well as all laws, legal ordinances and instructions which have to be commonly obeyed by a repair shop.
Safety Precautions for the MT-HV
| Observe the following to avoid incorrect handling and injury to the user or destruction of the MT- HV arising from this:
- Protect the MT-HV and all connecting cables from hot parts.
- Protect the MT-HV and all connecting cables from rotating parts.
- Regularly check all connecting cables/accessory parts for damage (destruction of the MT-HV due to short circuit).
- Only used certified test prods and high-voltage test leads.
- Regularly check the test prods and the high-voltage test leads for damage prior to every application (visual inspection).
- Do not exceed the allowed operating and ambient temperatures.
- Keep the MT-HV away from fluids such as water, oil or gasoline. The MT-HV is not waterproof.
- Protect the MT-HV from strong impacts and do not drop it.
- Immediately contact Hella Gutmann or a Hella Gutmann trading partner in case of any malfunctions of the MT-HV.
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Safety Precautions for High Voltage/Line Voltage
| It is a precondition for performing high-voltage measurements that the user has knowledge of automotive technology and is therefore aware of the sources of danger and risks in the workshop and on motor vehicles. An additional country-specific qualification is mandatory.
Very high voltages occur in electrical systems. Due to voltage flashover on damaged components, such as marten damage or touching live components, the risk of electric shock is likely. Voltage flashover can occur e.g. on the primary and secondary side of the ignition system, the connection to the vehicle, the lighting systems or the wiring harness with plug connections. Therefore regard the following:
- Only use power supply cables with grounding contact.
- Only use a checked or the attached power cord.
- Always use the original cable set.
- Do not exceed the voltage limits indicated on the connecting cables.
- The voltage values to be measured must be shielded extra or even twice from dangerous line voltage. The voltage limits printed on the test leads must not be exceeded. Pay attention that the allowed measuring range is not exceeded when measuring positive and negative voltage at the same time.
- Regularly check cables and adapters for damage.
- Perform any assembly work such as the connection of the MT-HV to the vehicle or the replacement of components only when ignition is switched off.
• Do not touch live components when the ignition is on.
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Safety Precautions – Chemical Burns
| In case of improper use electrolyte may escape from the battery and may cause chemical burn of eyes, respiratory system and skin. Therefore regard the following:
- Wear personal protective equipment when working on the battery.
- Immediately rinse acid splashes from parts of the body or clothing thoroughly with water and consult a doctor instantly.
- Instantly consult a doctor if you have aspirated acid vapor.
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Safety Precautions – Risk of Injury
| When working on the vehicle, there is a risk of injury through rotating parts or rolling of the vehicle. Therefore regard the following:
- Protect vehicle against rolling away.
- Additionally, place the gear selector to park position in vehicles with automatic transmission.
- Deactivate the start/stop system to avoid an inadvertent engine startup.
- Connect the MT-HV to the vehicle only when ignition is switched off.
- Do not reach into rotating components when engine is running.
- Do not run cables near rotating parts.
- Check the high-voltage parts for damage.
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Safety Precautions for Hybrid/Electric Vehicles
| Any work on high-voltage systems is allowed only when wearing the corresponding personal protective equipment.
Very high tensions occur on hybrid and electric vehicles. Due to voltage flashover on damaged components, such as marten damage or touching live components, the risk of electric shock is likely. High voltage at or in the vehicle can lead to death in case of inattention. Therefore regard the following:
- Only the following qualified employees are allowed to de-energize the high-voltage system:
- High-voltage technician
Skilled electrician for predetermined operations – Hybrid or rather electric vehicles
- Skilled electrician
- Place and attach warning signs and barriers.
- Check the high-voltage system and the high-voltage lines for damage (visual inspection!).
- De-energizing the high-voltage system:
- Regard the manufacturer- and vehicle-specific regulations.
- Regard the vehicle manufacturer’s instructions.
- Securing the high-voltage system against re-activation:
- Withdraw the ignition key and keep it safe.
- Keep the service disconnect plug in a safe place or secure the battery master switch against re-activation.
- Insulate the battery master switch, the plug connections etc. with dummy plugs, covering caps or insulating tape with the corresponding warning notice.
- Check the de-energized state with the MT-HV or another suitable and approved measuring tool. Even with disconnected high-voltage system, residual voltage can still be present.
- Ground and short-circuit the high-voltage system (necessary only if voltage is higher than 1000 V).
- Voltage below 1000 V: Cover the parts which are close to the system or which are energized e.
g. with insulating cloth, hoses or plastic coverings. Voltage higher than 1000 V: Cover the parts with insulating plates/protective panels specially developed for this purpose so that sufficient protection against contact to adjacent parts is ensured.
- Regard the following before re-energizing the high-voltage system:
- All tools and utilities are removed from the hybrid/electric vehicle.
- Remove the grounding and short circuit of the high-voltage system. Do not touch any of the cables now.
- Attach the protective paneling that has been removed before.
- Remove the protective measures at the switching system.
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Non-Liability
Burden of Proof on the User
The burden of proof is on the user of the product, that he has paid attention to technical explanations, notes on operation, equipment care as well as maintenance and safety without exception.
Documentation
The information given describes the most common fault causes. However, there
are often further causes of existing faults which cannot be listed here, or
there are further sources of error which as yet are unknown. The Hella Gutmann
Solutions GmbH does not accept any liability for failed, unnecessary or
incorrectly performed repair work.
Hella Gutmann Solutions GmbH does not accept any liability for the use of data
and information that is found to be incorrect or that was incorrectly
displayed, or for errors that occurred inadvertently during the compilation of
the data.
The Hella Gutmann Solutions GmbH will not take any liability arising from the
errors and misuse mentioned before and further losses of profit or company
value thereof.
The Hella Gutmann Solutions GmbH does not accept any liability for damages or
operational disruptions resulting from failure to observe the operating
instructions and the special safety precautions.
The burden of proof is on the user of the product, that he has paid attention
to technical explanations, notes on operation, equipment care as well as
maintenance and safety without exception.
Device Description
Delivery contents
Basic
Pieces| Name|
---|---|---
1
|
MT-HV
|
1
|
Power adapter and power cord
| 
1| USB cable (type C – type C)| 
1
|
Operating instructions
|
Positive
Pieces| Name|
---|---|---
1
| ****
MT-HV
| ****
1
| ****
Power adapter and power cord
|
1| USB cable (type C – type C)|
1
| ****
High-voltage test leads black/red
| ****
1
| ****
Operating instructions
| ****
Pro
Pieces| Name|
---|---|---
1
| ****
MT-HV
| ****
1
| ****
Power adapter and power cord
|
1| USB cable (type C – type C)|
1
| ****
High-voltage test leads black/red
|
1
| ****
MT 77
|
1
| ****
Black/blue test lead
|
1| ****
Red/black test lead
| ****
1
| ****
Operating instructions
| ****
Checking Delivery Contents
Please check the delivery contents upon receiving your device so that
complaints can be issued immediately regarding any potential damage.
Proceed as follows to check the delivery contents:
-
Open the package supplied and check for completeness based on the delivery slip.
Should you identify any damage to the package, then open the package in the presence of the delivery service and check the MT-HV for hidden damage. Any transport damage to the package supplied and damage to the MT-HV shall be registered in a damage report by the delivery service. -
. Take the MT-HV out of the packaging.
CAUTION
Danger of short circuit due to loose parts in or at the MT-HV
Danger of destruction of the MT-HV and/or the automotive electronics
Never put the MT-HV into operation if you suspect that there are loose parts in or at the module. In this case please contact the Hella Gutmann repair service or a Hella Gutmann trading partner immediately. -
Check the MT-HV for mechanical damage and shake slightly to ensure that there are no loose parts inside.
Intended Use
The MT-HV is a mobile measurement module with which you can measure voltage,
current, resistance and pressure.
You can use the MT-HV both for measuring high voltages and low voltages. Use
the installed high-voltage measurement module for high-voltage measurements.
You can insert another measurement module into the MT-HV for low-voltage
measurements.
The MT-HV can be operated only in connection with the mega macs X of Hella
Gutmann. The communication between the mega macs X and the MT-HV is realized
via Bluetooth®. Diagnostic devices from other manufacturers will not be
supported. The MT-HV is not suitable for the following repair work/voltage
measurements:
- Electric appliances and devices
- Home electrics
- Power supply systems/line voltage
If the MT-HV is used in a way not authorized by Hella Gutmann, the protection of the MT-HV and the mega macs X may be influenced.
Using the Bluetooth® Function
NOTICE
Alternatively, you can also operate the MT-HV with USB cable connected to the
mega macs X.
The terms of use of the Bluetooth® function may be restricted or prohibited
through law or corresponding legal regulations in certain countries.
Pay attention to the provisions in force in the respective country before
using the Bluetooth® function.
MT-HV
| Name
---|---
1
| Connection of HV test lead
Connect the red high-voltage test lead here.
2
| Connection of HV test lead
Connect the black high-voltage test lead here.
3
| Module slot
Insert another module (e.g. MT 77) into the module slot.
4
| Unlocking button
- Use the unlocking button to unlock and remove the MT-HV.
- Use the unlocking button to check if the inserted module is properly inserted.
MT-HV
| Name
---|---
5| USB-C interface
6| Ethernet interface
7
| Power supply socket
Connect a power adapter to the power supply socket to supply the MT-HV with voltage and to charge the internal battery.
8
| High- voltage
This LED indicates if e.g. a high-voltage measurement process is active or if high voltage is applied to the test prods (e.g. in case of insulation resistance measurement).
The different status indications are explained in the section User Communication
9
| Battery status display
This LED indicates the various battery charging states.
The different battery status display are explained in the section User Communication
10
| Update
This LED indicates that an update is in progress.
11| Bluetooth®
This LED indicates that the MT-HV is connected via Bluetooth®.
12
| MT-HV status
This LED indicates e.g. if the MT-HV is active or ready for operation.
The different status indications are explained in the section User Communication
13| ON/OFF button
Switch the MT-HV on and off with the ON/OFF button.
| Name |
|---|
14 / 15
| Ports Scope 2 (CH2)
Connect the test leads to Scope 2 (CH2) here.
• red = signal +
• black = signal –
16| ST3 connector
Connect the blue and the green clamp meter here.
17 / 18
| Ports Scope 1 (CH1)
Connect the test leads to Scope 1 (CH1) here.
• blue = signal +
• black = signal –
Device Description High-
Voltage Test Leads
High-Voltage Test Leads
| Name |
|---|
19
| High-voltage test lead (red)
• 4-mm-test connection (safety connector) for manufacturer-specific test adapters
• incl. function button to start or to confirm measurements
20| High-voltage test lead (black)
4-mm-test connection (safety connector) for manufacturer-specific test adapters
21| Attachable test prod (black)
22| Attachable test prod (red)
User Communication
Meaning of the LEDs with different interactions
| Interaction | LED |
|---|
When the MT-HV is switched off and you briefly push ON/OFF, the yellow LED will light up until the start procedure is completed.|
• After the start procedure is completed, the LED is permanently green and the MT-HV is ready for operation.
• When the MT-HV is switched on and you briefly push ON/OFF, the green LED will flash several times until the MT-HV is shut down entirely.
| ****
If the connection is inactive or if there is no connection in battery mode, the MT- HV will switch off after 2 minutes. Before that the red LED will light red for 60 seconds.|
If an update is in progress, the LED will flash several times green until the update is finished.|
The green LED is permanently on if the high-voltage measurement is active.|
The yellow LED is permanently on if high voltage is switched to the test
prods.| ****
The blue LED is permanently on if the MT-HV has Bluetooth® connection.|
Explanation of the battery status display:
more than 40 % of entire charge
• The battery status indicator flashes green if the battery is being charged.
• The status indicator is permanently green if the battery is fully charged.
20 % to 40 % of entire charge
20 % or less (charging required!)
• The battery status indicator flashes red if battery charge is less than 10 %.
| ****
Putting Into Operation
This section describes how to connect the MT-HV with the mega macs X.
Connecting the MT-HV with the mega macs X
Initial setup:
Proceed as follows to connect the MT-HV with the mega macs X for the first
time:
-
Connect the MT-HV with the supplied USB-C cable to the mega macs X.The mega macs X is recognizing the MT-HV automatically and is starting the pairing process.
-
Remove the USB-C
Now the MT-HV is connected with the mega macs X.
| NOTICE
Continuous operation:
• The MT-HV is connected via Bluetooth® with the mega macs X.
• There is a Wi-Fi connection between the displaying device (tablet etc.) and the mega macs X.
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Low-Voltage Measurement
- | NOTICE
You can alternatively use the measurement module MT 56 for measuring voltage, current and resistance.
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This section describes how to perform a low-voltage measurement in connection
with the MT 77 measurement
module. The following pictures illustrate the exact proceeding.
Inserting the MT 77 into the MT-HV
Proceed as follows to insert the MT 77 into the MT-HV:
-
Press the unlocking button of the MT-HV.
The module releases from the module slot. -
Insert the MT 77 into the free module slot, pay attention that it locks into place
-
Draw the module out of the module
Now the MT 77 is instered in the module slot of the MT-HV.
Connecting the Test Lead to the MT 77
Connecting the Current Clamp to Vehicle and MT 77
High-Voltage Measurement
This section describes how to perform a high-voltage measurement. The following pictures illustrate the exact proceeding.
Connecting High-Voltage Test Leads to the MT-HV
| Danger
Danger to life due to electric voltage
It is a precondition for performing high-voltage measurements that the user has knowledge of automotive technology and is therefore aware of the sources of danger and risks in the workshop and on motor vehicles. An additional country-specific qualification is mandatory.
---|---
| CAUTION
Danger of destruction of the MT-HV and/or the automotive electronics
• Only used certified test prods and high-voltage test leads.
• Check the test prods and the high-voltage test leads for damage prior to every application (visual inspection).
---|---
Performing High-Voltage Measurements
| DANGER
Danger to life due to electric voltage on vehicles with high-voltage systems
• It is a precondition for performing high-voltage measurements that the user has knowledge of automotive technology and is therefore aware of the sources of danger and risks in the workshop and on motor vehicles. An additional country-specific qualification is mandatory.
• Ensure, that the component to be evaluated is de-energized.
• Pay attention not to touch connections and connecting cables of the high-voltage battery module.
• Pay attention not to touch energized components.
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| NOTICE
The following image is an example.
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General information
Care and Maintenance
- Do not use cleaning agents.
- Only use a dry cloth.
- Replace damaged cables/accessories immediately.
- Only use original spare parts. You can order these parts via the Order Center of the Hella Gutmann GmbH. Note: The battery is available separately. Unscrew and remove the back cover of the housing to be able to exchange the battery:
DANGER
Danger to life due to electric voltage on vehicles with high-voltage systems.
Ensure that the test prods and the high-voltage test leads are not connected
to any component during that.
CAUTION
Danger of destruction of the MT-HV and/or the automotive electronics
Disconnect the MT-HV from the voltage supply during that.
Disposal
- | NOTICE
The guidelines listed here are exclusively valid within the European Union.
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In compliance with Directive 2012/19/EU of the European Parliament and Council
of 4 July 2012 relating to Waste Electrical and Electronic Equipment (WEEE),
and the German national statute governing the distribution, return and
environmental disposal of electrical and electronic equipment (Electrical and
Electronic Equipment Act – ElektroG) of 20 October 2015 in its current
version, we are obliged to take back this device, distributed by us after 13
August 2005, at the end of its service life free of charge and to dispose of
it in accordance with the above-mentioned directives.
Since, in the case of the present tool, this relates to exclusively
commercially used equipment (B2B), it must not be handed over to a public
disposal facility.
The device can be disposed of at the following address (specifying the date of
purchase and the device numbers): Hella Gutmann Solutions GmbH
Am Krebsbach 2
79241 Ihringen
GERMANY
WEEE reg. no.: DE 25419042
Phone: +49 7668 9900-0
Fax: +49 7668 9900-3999
E-mail: info@hella-gutmann.com
Technical data of the MT-HV
| Supply voltage | 12 to 32 V |
|---|---|
| Power input | max. 10 W |
| Current draw | max. 1 A |
Ambient temperature
| Recommended: 10 to 35 °C
Working range: 0 to 45 °C
Storage temperature: -10 to 60 °C
Suitable for humid environment?| No
Use at high altitude| max. 2000 m above NHN (normal height null)
Relative air humidity| approx. 10 to 90 % (not condensating)
Continuous operation| Yes
Weight| approx. 1.7 kg
Dimensions| 300 x 360 x 80 mm (L x W x H)
IP degree of protection| IP20
Overload protection| max. 1 kV
Measuring channels| 1 (galvanically isolated)
Measured variables of the HV modules
| • High-voltage measurement up to 1 kV
• Potential equalization measurement
• Insulation resistance measurement
• Resistance measurement (service disconnect plug)
Interfaces
| • USB-C
• Bluetooth®
• RJ45
Ranges
Voltage
| • Measuring range: ± 1000 V DC
• Resolution: 0.1 V
• Precision: ± (1 % of reading + 2 digits)
Insulation resistance measurement
| • Measuring range: 10k to 10GΩ
• Test voltage: variably adjustable to 1000 V DC in steps of 10 V
• Resolution: 0.1
• Precision: ± (3 % of reading + 3 digits)
Resistance (service disconnect plug)
| • Measuring range: 0 to 10 Ω
• Resolution: 0.01 Ω
• Measuring current: 200 mA
• Precision: ± (2.5 % of reading + 4 digits)
Potential equalization measurement
| • Measuring range: 0 to 10 Ω
• Resolution: 0.01 Ω
• Measuring current: 200 mA
• Precision: ± (2.5 % of reading + 4 digits)
High-Voltage Test Leads
Red
| • Length: 1500 mm
• Handpiece with function button
• With 4 mm test connection for manufacturer-specific test adapters
• incl. plug-on measuring probe
black
| • Length: 1500 mm
• Handpiece
• With 4 mm test connection for manufacturer-specific test adapters
• incl. plug-on measuring probe
Technical Data of the MT 77
| Supply voltage | 5 V (through module interface) |
|---|---|
| Power input | 10 W |
| Current draw | max. 2 A |
Ambient temperature
| Recommended: 10 to 35 °C
Working range: 0 to 45 °C
Storage temperature: -10 to 60 °C
Suitable for humid environment?| No
Use at high altitude| max. 2000 m above NHN (normal height null)
Relative air humidity| approx. 10 to 90 %
Continuous operation| Yes
Weight| approx. 270 g
Dimensions| 43 x 110 x 136 mm (H x W x D)
IP degree of protection| IP20
Bandwidth| max. 10 MHz
Sampling rate| 64 MSa/s
Memory depth| 64 kB
Amplitude resolution| 14 bit
Overload protection| max. 200 V
Measuring channels| 2 (galvanically isolated)
Measured variables
| • Voltage
• Current (external clamp meter)
• Resistance
• Pressure (external LPD kit)
Measuring accuracy| +/- 2.5 %
Interfaces
| • 4x safety socket 4 mm (2 per measuring channel)
• 1x ST3 (12-pin)
• 1x module interface (USB) ST3 connections
• 6x communication
• 1x voltage inlet 10-15 V
• 1x voltage outlet +17 V
• 2x scope (+/-)
• 1x hardware detection (coding)
• 1x ground
Range
Voltage
| • Range
10 positions, 0.01 to 20 V/Div
• Measurable voltage
max. 200 V
Current
|
- Blue clamp (CP 700)
- Measuring range: ± 700 A
- Current load: max. 25 mA
- Green clamp (CP 40)
- Measurable current: -10 to 40 A
- Current load: max. 25 mA
Resistance
|
- Range: 6 positions, 1 Ohm/Div to 100 kOhm/Div
- Current output: 1 to 10 Ohm/250 µA, 10 to 100 Ohm/2.5 mA, 100 kOhm/25 µA, 1 MOhm/2.5 µA
- Measurable resistance: approx. 1 MOhm
Pressure (with LPD kit)
|
- Range: 4 positions, 0.2 to 2 bar/Div
- Measurable pressure: max. 60 bar
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