Kzyee KM50 User manual

Vehicle Super Probe
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Table of Contents
1. IMPORTANT SAFETY INFORMATION......................................................2
2. PRODUCT INTRODUCTION .....................................................................3
3. PRODUCT SPECIFICATIONS ....................................................................4
4. PRODUCT APPEARANCE ….........................................................................5
5. FUNCTION INTRODUCTION ..................................................................6
5.1 DC VOLTAGE .........................................................................................7
5.2 AC VOLTAGE............................................................................................8
5.3 FREQUENCY...................................................................................9
5.4 DUTY CYCLE.............................................................................10
5.5 FUEL INJECT...............................................................................................11
5.6 RESISTANCE. ...........................................................................12
5.7 DIODE................................................... ...................................13
5.8 VOLTAGE & POLARITY TESTING..........................................................14
5.9 CONTINUITY TESTING............................................ .................15
5.10 SIGNAL CIRCUIT TESTING....................................................................... 16
5.11 ACTIVATING COMPONENTS IN YOUR HAND.........................................17
5.12 ACTIVATING COMPONENTS IN THE VEHICLE.......................................18
5.13 TESTING TRAILER LIGHTS AND CONNECTIONS.............................19
5.14 ACTIVATING COMPONENTS W/GROUND...............................................20
5.15 FOLLOWING & LOCATING SHORT CIRCUITS.........................................21
5.16 CHECKING FOR BAD GROUND CONTACTS..........................................21
6. PARTS LIST .................................................................................21
7. PRODUCT WARRANTY .............................................................................22

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1. Important Safety Information
To prevent personal injury or damage to vehicles and/or the test tool, read this
instruction manual first and observe the following safety precautions at a minimum
whenever working on a vehicle:
Always perform automotive testing in
a safe environment.
Wear safety eye protection that
meets safety standards.
Keep clothing, hair, hands, tools, test
equipment, etc. away from all
moving or hot engine parts.
Operate the vehicle in a
well-ventilated work area: Exhaust
gases are poisonous.
Put blocks in front of the drive
wheels and never leave the vehicle
unattended while running tests.
Use extreme caution when working
around the ignition coil, distributor
cap, ignition wires and spark plugs.
These components create
hazardous voltages when the engine
is running.
Put the transmission in PARK ( for
automatic transmission) or
NEUTRAL (for manual transmission)
and make sure the parking brake is
engaged.
Keep a fire extinguisher suitable for
gasoline/chemical/ electrical fires
nearby.
Don’t connect or disconnect any test
equipment while the ignition is on or
the engine is running.
Keep the tool dry and clean. Use a
mild detergent on a clean cloth to
clean the outside of the test tool,
when necessary.
When the rocker switch in the tool is
depressed battery current/voltage is
conducted directly to the tip which
may cause sparks when contacting
ground or certain circuits. Therefore
the tool should NOT be used around
flammables such as gasoline or its
vapors. The spark of an energized
tool could ignite these vapors. Use
the same caution as you would when
using an arc welder.
Warning!
KM50 is ONLY for 12-24V vehicle battery electrical systems, and should NOT be
used to test 110/220V household electric appliances; otherwise, it will be damaged.
The LED and LCD pull no more than 100 milliamp of current, therefore when using
this device as a test light or multimeter, it is safe for computer and airbag.
While performing component activation, please pay special attention: when the
instrument is powered on, if the rocker switch is pressed forward or rearward,
it means that all the battery current is being introduced from the positive or
negative pole through the probe. Please strictly follow the instructions to avoid
damage to the vehicle’s electrical component.

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2. Product Introduction
KM50 Can:
1. Diagnose 12 ~24V automotive electrical systems swiftly and accurately.
2. Show battery voltage reading and help user determine circuit polarity immediately
after connecting the KM50 clips to the vehicle battery.
3. Test DC Voltage, AC Voltage, Frequency, Duty Cycle, Fuel Injection Circuit,
Resistance, and Diode. Especially, in AC Voltage, Frequency, Duty Cycle and
Fuel Inject Modes, user can long press the mode button for 3 seconds to switch
between Waveform Display Mode and Digital Display Mode.
4. Activate electrical components and test their functions without jumper leads – by
depressing the rocker switch to conduct a positive or negative battery current to
the tip so as to power up electrical components.
5. Test bad ground contacts instantly without performing voltage drop tests.
6. Help user to follow and locate short circuits without using external fuses.
7. Test continuity with the assistance of its auxiliary ground lead.
8. The tool is short-circuit protected. If it becomes overloaded, Its internal circuit
breaker will trip to protect the instrument from overload.
9. When the circuit breaker is tripped, the tool will NOT be able to conduct battery
current to the tip even when the rocker switch is pressed; however, all other
functions of the tool are still active, which means you can still probe a circuit and
observe the voltage reading.

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3. Product Specifications
(1) Tool Specifications
Display TFT color display (160x128 dpi )
Operating Temperature 0 to 60℃( 32 to 140℉)
Storage Temperature -5 to 70℃(-40 to 185℉)
Dimensions (L*W*H) 200mm*52mm*39mm
Net Weight 0.48Kg
(2) Electrical Specifications
Supply Voltage 8V DC ~ 30V DC
DC/ AC Voltage Test -110V ~ 110V
Frequency 0Hz ~ 1Mhz
Duty Cycle 0.0~100.0%
Fuel Injection Voltage: 0~180V, Time: 0~25ms
Resistance 0~1MΩ
Diode Germanium diode, silicon diode
Rating Current 1A~8 A
Instrument Trip Time:
8 Amps: Hold > 1 hour.
12 Amps: current: trip in one hour.
16 Amps: current: trip in 3-30 seconds.
24 Amps: current: trip in 0.5-4.0 seconds.

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4. Product Appearance
Figure 1
1) Probe Tip - Contacts the circuit or
component to be tested.
2) LED Lights - Illuminates dark work
areas or work areas at night.
3) LCD Display - Indicates test results,
test data and waveforms.
4) Red/ Green Polarity Indicator -
Identifies positive, negative or open
circuits. The RED Indicator lights
when the Probe Tip is contacting a
positive circuit. The GREEN
Indicator lights when the probe tip is
contacting a negative or negative
voltage circuit. When the resistance
is being measured, the green
indicator light is on when the
resistance is less than 30Ω.
5) Function Button:
Switching Light ON &OFF/Up
Button - short press is the up button,
long press is to turn the light on/off;
Mode Button - for selecting test
mode;
Silent/Down Button - short
press is the down button, long press
is to turn on/off the buzzer.
6) Rocker Switch - Allows you to
conduct a positive or negative
battery current to the tip for
activating and testing the function of
electrical components.
7) Auxiliary Ground Lead - Assists
test as a ground lead.
8) Red/Black Alligator Clips - Clip the
red alligator clip to the battery
positive pole; Clip the black alligator
clip to the battery negative pole.

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5. Function Introduction
KM50 has 7 test modes: DC Voltage, AC Voltage, Frequency, Duty Cycle, Fuel
Injection Circuit Detection, Resistance, and Diode. Especially, in AC Voltage,
Frequency, Duty Cycle and Fuel Inject Modes, user can long press the mode button
to switch between Waveform Display Mode and Digital Display Mode. After the power
is turned on, short press the mode button to enter the menu, select the test mode by
pressing the up and down keys, and then press the mode button to enter the desired
test mode.
Before testing a circuit or component, make sure your tool is in good order by doing a
quick self-test. Connect the vehicle battery properly to turn the instrument on, the
instrument enters DC Voltage Mode by default, and the fast self-test is performed in
DC Voltage Mode. The rocker switch is an on-off switch located on the tool’s front
side. The positive and negative poles are marked above and below the switch. Press
the Rocker Switch forward to activate the tip with a positive voltage. The Red LED
should light and LCD display will read the battery voltage and tip voltage. A beep tone
will sound. Let go of the rocker switch and the LED will turn off and the tone will cease.
Press the Rocker Switch rearward to activate the tip with a negative voltage. The
Green LED should light and the LCD display will read the battery voltage and 0.0V
(ground). A beep tone will sound. Let go of the rocker switch and the LED will turn off
and the tone will cease. Your tool is working correctly and is now ready for use.
(Figure 2)
Figure 2

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IMPORTANT: When powering-up components, you can increase the life of rocker
switch in the tool if you first press the switch, and then contact the tip to the
component. The arcing will take place at the tip instead of the metal contacts of the
rocker switch.
5.1 DC Voltage
Figure 3
1) Clip the red alligator clip to battery positive pole; clip the black alligator clip to
battery negative pole.
2) Contact the probe tip to the circuit.
3) The LCD display will show the battery voltage and the real-time voltage,
maximum and minimum values at the probe (Figure 3). The battery voltage
reading will not be affected and its accuracy can be assured by the application of
Kelvin test method, which avoids voltage drop usually caused by excessive length
of instrument power cable.

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5.2 AC Voltage
Figure 4
1) Clip the red alligator clip to the battery positive pole; clip the black alligator clip to
the battery negative pole.
2) Once the device is powered on, it will enter DC voltage test mode as default.
Short press the mode button to enter the menu, short press the down button to
place the cursor in the AC voltage mode, and short press the mode button to
enter the AC voltage waveform display mode.
3) The auxiliary ground wire is connected to one end of the circuit under test, and
the probe contacts the other end of the test circuit. The LCD display will read the
maximum and minimum voltage value (Figure 4), and display the signal waveform
in real time. You can adjust the sampling frequency by pressing the Up/Down
Button.
4) In Figure 4, “time: 10 ms” is the time interval indicated by each large grid. This
time reading will change with the sampling frequency.
5) Long press and hold the mode button until the device switches to digital display
mode. The device will display the true RMS value, the minimum voltage value,
and the maximum voltage value.

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5.3 Frequency
Figure 5
1) Clip the red alligator clip to the battery positive pole; Clip the black alligator clip to
the battery negative pole.
2) Once the device is powered on, it will enter DC voltage test mode as default.
Short press the mode button to enter the menu, short press the down button to
place the cursor in the frequency mode, and short press the mode button to enter
the frequency waveform display mode.
3) The auxiliary ground wire is connected to one end of the circuit under test, and
the probe contacts the other end of the test circuit. The LCD display will show the
minimum frequency, maximum frequency and waveform frequency (Figure 5),
and display the signal waveform in real time. You can adjust the sampling
frequency by pressing the Up/Down Button. In Figure 5, “time: 500us” is the time
interval indicated by each large grid. This time reading will change with the
sampling frequency.
4) Long press and hold the mode button until the device switches to digital display
mode. The LCD display will display the current frequency, minimum frequency,
and maximum frequency.