MS121
Tester for diagnostics of electromagnetic valves and clutches of vehicle air conditioner compressors
Tester MS121 is a compact device for testing both electromagnetic clutches and control valves of automotive climate systems.
Manufacturer:
MSG Equipment
Tester MS121 is used to perform quick and easy check of the following parameters of electromagnetic clutch and control valve:
- presence of a diode;
- current consumption;
- short circuit (cs);
- circuit break (cb);
- rate of valve opening.
Both clutch and valve can be tested either on the compressor removed from a car (at a repair shop) or directly on a car.
Features:
- Simplicity and ease-of-use.
- Automatic polarity selection for connection of the tested unit.
- Simultaneous testing of a clutch and a valve.
- Possibility of a compressor electromagnetic valve control.
- Possibility to test without removing from a car.
Technical Specifications
Supply voltage, V
from 10 to 16 (current consumption up to 5 A)
Types of protection
short-circuit protection
Rated voltage of the diagnosed units, V
12
Control
on the touch screen
Width, m
0,167
Depth, m
0,027
Height, m
0,088
Weight, kg
0,97
Units (assemblies) to be tested
with a diode, without diode
Automatic polarity selection
yes
Maximum coupling test current, A
5
Maximum valve test current, A
1.2
Power source
Battery (on-board vehicle network)
Video overview
Training course on diagnostics and repair of electric and mechanical car air conditioning compressors
A hands-on course for service center professionals who want to master the diagnostics, repair, and maintenance of vehicle climate systems, including belt-driven and electric compressors (for hybrids and EVs). Over 4 days, participants will study theory and practice using modern equipment. Upon completion — full readiness to work independently with any complexity of air conditioning systems.
Click the link to learn more about the course
Materials about MS121 to download:
Format
Name
Latest update
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User interface language
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Rated voltage of the diagnosed units, V
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Load on alternator
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Power of diagnosed starters, kW
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Automatic alternator test mode
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Voltage regulators database
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Rated voltage of the diagnosed units, V
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Power of diagnosed starters, kW
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Automatic alternator test mode
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Voltage regulators database
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Working fluid
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Rated voltage of the diagnosed units, V
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Vehicle coverage
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