Kzyee KM20 Original instruction manual

Multisystem Ignition Analyzer
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Table of
Contents
1. Important Safety Information…………………..……………………………………..2
2. Technical Specifications………………..……………………………………………..2
2.1 General specifications……………………………………………………………..2
2.2 Electrical specifications………………………………………………………………2
3. Operating Instruction…………………………..……………………………………....3
3.1 Instrument description…………………………..……………………………..........3
3.2 LCD Display………………………………………………………………………...4
3.3 Buttons description and operation………………………………………………….5
3.4 Measurement procedures …………………………………………………….....7
3.5 Additional functions…………………………………………………………….....11
4. Application information……………….................................................................12
4.1 Taking measurements…………………………………………………………....12
4.2 Diagnostic using spark burn time and spark KVolt readings……………….…..12
4.3 Common causes of long burn time readings………………………...………......12
4.4 Common causes of short burn time readings………………………….…….......13
4.5 Common causes of low spark KVolt readings…………………………….......... 13
4.6 Common causes of high spark KVolt readings…………………………..….......13
5. Maintenance………………………………………………..…………………………..14
5.1 Battery replacement………………………………………………………………...14
5.2 Cleaning ………………………………………….…..……………………………..14
6. Warranty ……………………………………………………………………………...15

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1. IMPORTANT SAFETY INFORMATION
◆This instrument can be used indoor, the temperature should between 32℉and
104℉( 0℃and 40℃), altitudes up to 6500 ft ( 2,000 meters ).
◆In order to use the instrument safely, please follow all the safety and operating
instructions of this manual to operate. The security feature of this instrument will be
impaired if not following the manual to operate.
◆If this instrument, the capacitive pick-up or the flexible probe looks damaged, or
you suspect that the instrument is operating abnormally, please do not use it under
the circumstances.
◆In order to avoid personal injury and damage to the instrument, capacitive pick-up
or flexible probe, please keep away from the moving parts ( fan, transmission belts
etc.) and hot objects (exhaust pipe, muffler, catalytic converter, etc) when using the
instrument.
◆Please do not connect or apply more than 42 VDC or any AC current to the
capacitive pick-up or the flexible probe.
◆When operate the circuit above 60 V DC or 25 V AC, to avoid electrical shock,
please be careful at any time. Because such voltage may cause shock hazard.
◆Please do not operate the instrument when the battery cover is off.
◆In order to avoid electrical shock or damage to the instrument, please do not
exceed the specified input limits.
When using this instrument, if exceeding the above limitation or not paying attention
to the precautions, it may cause personal injury or permanently damage to the
instrument or the vehicle under test.
2. TECHNICAL SPECIFICATIONS
2.1 General Specifications
Display: LCD 128 x 64 digits screen.
Update rate: 3 per second ( for LCD).
Ignition system comp.: Coil on plug, coil near plug, DIS, conventional and magneto.
Engine cycles: 2 and 4 cycles and DIS (distributorless ignition system).
Power: 9 Volt battery.
Auto power off: Automatically powers off after 3 min. of no operation.
Battery life: Approximately 20 hours (w/alkaline battery).
Probe length: 35 cm, Including capacitive pick-up.
Dimensions: 165x100x32 mm without antenna.
Weight: Approximately 0.363 kg (Including battery).
Included accessories: Padded hard carrying case, user’s manual, rubber holster
and 1x9 Volt alkaline battery.
2.2 Electrical Specifications
◆The specifications below are in the standard 23℃environment, there will be
slight difference between different equipments and temperatures. To avoid personal
injury or damage to the instrument, the input voltage should not exceed the specified

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maximum value.
Function
Measurement
Range
Accuracy/
Repetitivity
Input Characteristics
RPM
200 to 19999 RPM 2
and 4 cycles and DIS
Accuracy:
0.5%±1 LSD
Input Impedance:
100KΩ+ 1.5 nF
(Minimum).
Input Protection:
±42 VDC Max.
Spark KV
0 to 50 Kv
Repeatability:
3%±1 LSD
Spark burn
time
0 to 10 ms
Accuracy:
±0.1ms
3. OPERATING INSTRUCTION
3.1 Instrument Description
1) Capacitive pick-up
2) Flexible probe
3) Protective rubber holster
4) LCD Display
5) Power /Reset button
6) F2 button
7) Ignition System button
8) F1 / Calibrate button
9) Engine Cycles button
Fig. 1- Instrument description

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3.2 LCD Display
3.2.1 LCD Display description
Fig.2-LCD Display
3.2.2 ‘ ’ Low battery indicator
The low battery indicator reminds that the battery voltage is below the recommended
minimum value, it need to be replaced a new battery.
Notes:
◆If the battery voltage is low but still allows the instrument operating, the low
battery indicator will appear and maintain until replace a new battery.
◆If the instrument turns off immediately after turning on, it means that the battery
voltage is below the absolute minimum value, it should be replaced a new battery in
case of malfunction.
3.2.3 Number of Cycles
Displays the number of cycles (strokes) selected: 2,4 or DIS.
3.2.4 Ignition System
Displays the selected ignition system measurement: “SPW”for Spark Plug Wire,
“COP”for Coil on Plug and Coil near Plug.
3.2.5 Spark Detected
A flashing high voltage symbol indicates that the spark is detected in the
ignition system.
3.2.6 Secondary display A
Press the “F2”button, according to the selected setting, it will display the maximum
reading, RPM or the spark KVolt with the selected measurement units and/or
functions.
3.2.7 Secondary display B
Press the “F2”button, according to the selected setting, it will display the minimum

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reading, RPM or the spark burn time with the selected measurement units and/ or
functions.
3.2.8 Main display
Press the “F1/Calibrate”button, the main display can be set to show the engine
RPM, spark KVolt or spark burn time.
3.2.9 Functions and measurement units
Displays the measurement units and / or the functions of the main display. The
selected functions with measurement units will show as below.
Display
Function
Measurement units
RPM
Tachometer
RPM (Revolutions per minute)
Burn Time mS
Spark plug burn time
mS (Milliseconds)
Spark KVolt
Spark plug peak voltage
KVolt (1000 x Volt)
3.3 Buttons description and operation
3.3.1 Power ON/OFF and Reset button
◆When the instrument is off, press the “Power / Reset”button until the
instrument turns on ( about 1 second).
◆When the instrument is on, press the “Power / Reset”button until the
instrument turns off (about 3 seconds).
◆When the instrument is on, press the “Power / Reset”button
momentarily to reset the maximum and minimum and capture values.
Note: In order to prolong the battery life, the instrument will automatically turn off after
3 minutes of being idle ( i.e. No button pressed and no input signal). When not
in use, turn off the instrument manually will prolong the battery life.
3.3.2 Ignition System button
◆Press the “Ignition system”button to select the ignition system
measurement mode that matches the ignition system of the engine under
diagnosing, explain as below. The selected setting will be shown on the

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display.
◆SPW (Spark Plug Wire): This setting apply to all the ignition systems
equipped with high voltage spark plug wire ( i.e.:Conventional distributor,
magneto, distributorless or waste spark ignition systems ).
◆COP (Coil On Plug): This setting apply to the ignition systems which
the ignition coil is mounted near the spark plug or on top of the spark plug.
3.3.3 Engine Cycles button
◆Press the “Engine Cycles”button to select the number of cycles for
the engine under testing. The number of cycles will change between 2
cycles, 4 cycles and DIS setting each time the button is pressed. The
selected setting will be shown on the display.
◆In SPW (Spark Plug Wire) measurement mode, it can be set to: 2 or 4
cycles or DIS ( Distributorless or waste spark ignition system ).
◆In COP ( Coil on Plug ) measurement mode, it can be set to: 2 or 4
cycles.
3.3.4 F1 / Calibrate button
◆Press this button will change the measurement which shown on the
main display. There are three measurements to select: RPM, spark burn
time, and spark peak voltage. The measurement functions will be changed
each time the button is pressed momentarily.
◆Press this button for 3 seconds to start the automatically calibration of
the unit, enter the COP module type under testing. While calibrating, the
screen will display“Calibrating please wait”, it will turn back to the normal
after accomplishing the procedure ( about 3 seconds ). The calibration
function is disable when in SPW mode.
3.3.5 F2 button
◆Press the button momentarily will change the display of the two
secondary displays. There are two possible selections: the two
measurements not shown in the main display or the Maximum and
Minimum readings of the main display. Press the button for three seconds
to turn on/ off the display backlight.

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3.3.6 Main and Secondary Functions display combinations
Fig.3- Examples of Main and Secondary Functions combinations
3.4 Measurement Procedures
CAUTION
To avoid personal injury or damage to the instrument, please check the spark
plug wire, distributor cap, ignition coil, ignition module and other ignition
system components carefully for damage or leaks. If there is any damage or
leaks, please do not use the instrument. Please do not touch the capacitive
pick-up or the flexible probe during the testing period. Please wear insulating
gloves when working around the high voltage and hot parts, and keep away
from moving objects ( fans, transmission belts etc.) and hot parts (exhaust
manifold and pipes, muffler, catalytic converter, etc.).

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3.4.1 Instrument measuring functions
There is the special dedicated mode for the ignition technology of diagnosing and
troubleshooting the Coil on Plug and Coil near Plug, and using the spark plug wire
system. These dedicated modes compensate the difference in signal strength and
waveform patterns between ignition systems.
The instrument can measure the below function:
◆Engine RPM,
◆Spark burn time
◆Spark KVolt (relative measurement).
3.4.1.1 Engine RPM
Measure the engine RPM in 2, 4 cycles and DIS engines, in order to evaluate the
ignition system performance in different engine speeds, it can combine the spark
burn time and spark KVolt to use.
3.4.1.2 Spark burn (firing) time
The spark burn time, also called “firing time”, it’s the time period measurement of a
spark from ignition to extinguishing, it’s the best measurement to indicate the ignition
system performance. The abnormal long or short burn time is likely to indicate that
there are some problems with the ignition module, spark plug, fuel mixture or cylinder
compression, etc.
3.4.1.3 Spark KVolt
The spark KVolt value is a relative measurement, it’s used to compare the ignition
system performance in each cylinder. It can diagnostic the common problems by
comparing the spark KVolt between different cylinders, such as misfire, broken spark
plug wire, etc. But the spark KVolt values vary widely, they are inconsistent, and not
always indicate a properly working ignition system.
3.4.2 Measuring Coil on Plug and Coil near Plug ignition systems
1- Turn on the instrument.
2- Press the “Ignition System”to select if the instrument is not already in the COP
mode.
3- Press the “Engine Cycles”button repeatedly to select the number of cycles for the
engine under testing, until the display shows the correct setting.
4- Select the measurement to show on the display: RPM, spark burn time and spark
KVolt.
5- Select the mode for the secondary display: the Minimum and Maximum value of
the main display or the complementary measurements.
6- Place the capacitive pick-up over one of the ignition modules, as show in Fig. 4,
search the position that produce the stable RPM or the spark burn time reading.
7- Calibrate the spark KVolt measurement first if this is the first measurement for the
engine, since this calibration value will be used as the reference value to compare
the spark KVolt reading between the coil on plug or coil near plug modules.

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8- Place the capacitive pick-up over the ignition module, read the measurements.
Fig. 4-Capacitive pickup on coil on plug module
Important:
◆In some engines, the ignition modules are close to each other, this may cause the
capacitive pick-up of the instrument receive signals from nearby modules, it may
cause false readings.
◆In order to reduce interference from other ignition modules, the nearby ignition
modules should be completely covered with pieces of aluminum foil, make sure that
the aluminum foil is connected to the electrical grounding system of the engine.
Fig. 5 –Avoiding interference by shielding nearby ignition coils
3.4.3 Spark plug wire ignition systems
1- Turn on the instrument.
2- Please press the “Ignition System”button to select if the instrument is not already
in the SPW (Spark Plug Wire) mode.