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.

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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 or 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 spark wires, read the measurements.
Fig. 6 –Capacitive pick-up on spark plug wire
Important:
◆The relative position from the capacitive pick-up to the spark plug wire should be
the same for every measurement, so as to obtain the consistent result when
measuring the spark KVolt on spark plug wires.
◆There is an easy way to obtain the consistent result of the measurement: place the
capacitive pick-up at 90°or parallel to the spark plug wire, and then repeat the same
positioning for every spark plug wire. ◆The spark burn time and RPM
measurements are not sensitive to the exact position of the capacitive pick-up
relative to the spark plug wire, but it has to be placed so the instrument can detect the
signal.
◆The capacitive pick-up may receive signals from several wires at the same time if
several spark plug wires are bounded close together, this may cause false
measurement. In order to reduce interference and obtain the correct measurement,
the wires under test should be separated in this situation.
3.4.4 KV Adjust function
In the SPW (Spark Plug Wire) mode, the instrument allows the user to adjust the
scale used for spark plug wire peak voltage measurements in order to match
readings with other instruments (i.e. Ignition Scope ).
To use the KV Adjust function:
1- Turn the instrument on.
2- To perform adjustments of the KV scale while performing actual measurements,
select the Peak KVolt function as described in “3.4.1.3 Spark KVolt”.
3- Press and hold the “Engine Cycles”button until the minimum reading in the
display is replaced by “KV Scale”and a number followed by a “%”sign.
4- While holding the “Engine Cycles”button pressed, use the “F2”(Cylinder Increase)

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or “F1 /Calibrate”(Cylinders Decrease ) button to adjust the scale value.
3.5 Additional functions
3.5.1 Minimum and Maximum functions (For COP and SPW modes)
This instrument remains the record of the minimum and maximum readings of the
function currently selected.
1- In order to display the minimum and maximum readings of the main display,
press the “F2”button if not already selected.
2- In order to reset the minimum and maximum readings, press the “Power /Reset”
button momentarily. These values will be reset after turning on the instrument.
3.5.2 Spark KVolt calibration function (For COP mode only)
In order to measure the spark KVolt in Coil on Plug and Coil near Plug ignition
systems, this instrument requires the user to calibrate the instrument. This calibration
uses the measurement values obtained during the procedure to find the optimal
measurement parameters or a particular type of the ignition module, and
compensates for the difference in waveform and signal strength.
◆Once the instrument calibrated one of ignition modules of the engine under test,
the spark KVolt measurement will relative to the calibration value.
◆Follow the procedure as described in “3.4.2 Measuring in Coil on Plug and Coil
near Plug ignition systems”to calibrate the instrument.
Fig. 7 –Display during calibration
Notes:
◆The instrument will display the default baseline value of “10.0 spark KVolt”
immediately after calibration. All the spark KVolt measurements obtained thereafter
will relative to the calibration value module.
◆The calibration does not have any influence on the spark burn time or the PRM
measurement. (These are absolute).
◆The Spark KVolt values obtained before and after calibration may not be
comparable if calibrate the instrument again.
◆The instrument will display a false “0.0 Spark KVolt”reading when measuring the
spark KVolt on Coil on Plug and Coil near Plug systems if not calibrated.
3.5.3 Auto power off
In order to prolong the battery life, the instrument will automatically power off after

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about 3 minutes of inactivity.
Inactivity means:
◆No buttons are pressed
◆No measurements are taken
4. APPLICATION INFORMATION
4.1 Taking measurements
1- According to the instructions in “3.4 Measurement Procedures”, select the ignition
system to measure.
2- Observe the spark burn time and spark KVolt reading of the display. It’s normal that
there are some changes of the readings, it reflects the actual changes in the spark
voltage and burn time of the ignition system.
3- Record or memorize the maximum, minimum and average reading. Test every
spark plug wire or ignition module of the engine repeatedly, pay attention to the
reading which is obviously higher or lower than the average.
4- The ignition problems may sometimes appear at the high engine RPM, but not at
low or idle speed.We recommend to measure at idle speed and the normal engine
operating temperature, and then increase the RPM, until the high speed, generally
about 2000 to 2500 RPM. Please do not exceed the limited maximum value of the
engine speed (“red-line”). All the measurements should be taken at about the
same engine speed, check the RPM by using the tachometer function of the
instrument.
4.2 Diagnostic using spark burn time and spark KVolt readings
Some changes of the spark burn time and spark KVolt readings between different
cylinders are normal, these do not indicate any problem.
Pay attention to the significant difference readings caused by the engine or the
ignition system problems for the diagnostic purpose.
Important:
◆The RPM and the spark burn time shown on the display are the absolute
measurements.
◆The spark KVolt is the relative measurement, it should be used to compare the
ignition module or the spark plug wire only in the same engine.
◆In the COP mode, before measuring and comparing the results between cylinders,
please calibrate spark KVolt in one of the ignition modules as described in “3.4.2
Measuring Coil on Plug and Coil near Plug ignition systems”.
◆The placement of the capacitive pick-up along the spark plug wire will also cause
some variation when measuring on spark plug wires ( SPW mode), due to the internal
resistance of the spark plug wire. For example, if the capacitive pick-up is placed on
the spark wire near the distributor or the DIS coil, the voltage reading will be higher
than if placed near the spark plug.
4.3 Common causes of long burn time readings
◆Short circuit, dirty or the gap of the spark plug is too small.

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◆Dirty or the damaged spark plug insulator or boot allows the spark “tracking”
across the insulator.
◆Rich mixture. Most likely due to the leaking fuel injector, or the faulty oxygen
sensor.
◆Low cylinder compression pressure. It may be caused by the leaking valves, worn
piston ring, blown cylinder head gasket, etc.
4.4 Common causes of short burn time readings
◆Spark plug is worn or the gap is too wide.
◆Spark plug connector is damaged, loose or disconnected.
◆The resistance of the ignition coil primary circuit is excessive.
◆Lean mixture.
4.5 Common causes of low spark KVolt readings
◆Short circuit, dirty or the gap of the spark plug is too small.
◆Dirty or the damaged spark plug insulator or boot allows the spark “tracking”
across the insulator.
◆The core of the spark plug wire is broken. The break is located between the
distributor ( or DIS coil ) and the test point.
◆Short circuit, disconnection or partial disconnection between the distributor ( or DIS
coil ) and the spark plug.
◆Rich mixture. Most likely due to the leaking fuel injector, or the faulty oxygen
sensor.
◆Low cylinder compression pressure. It may be caused by the leaking valves, worn
piston ring, blown cylinder head gasket, etc.
4.6 Common causes of high spark KVolt readings
◆Spark plug is worn or the gap is too wide.
◆Spark plug connector is damaged, loose or disconnected.
◆The core of the spark plug wire is broken. The break is located between the spark
plug and the test point.
◆Lean mixture.

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5. MAINTENANCE
5.1 Battery replacement
Fig. 8 - Battery replacement
To replace the internal battery:
1- As show in Fig.8, find out the battery compartment at the back of the instrument.
2- Open the battery cover.
3- Pay attention to the polarity of the battery connectors, connect the new battery.
4- Close the battery cover.
5- Press the “Power / Reset”button until the display turns on. Please check the
polarity of the battery if the display does not turn on, reinstall the battery if necessary.
To turn off the instrument, press the “Power / Reset”button again until the display
turns off.
5.2 Cleaning
When not in use, please keep the instrument in the carrying case, do not subject it to
dampness or severe heat or cold. Do not use the instrument in rain, use a clean
paper towel to dry it off before storing it if it should accidentally get wet.
Prevent the instrument contacting with any solvents. Please do not clean it with a
solvent or petroleum based medium such as gasoline, as these chemical may attack
the plastic parts and cause permanent damage. Do not use an abrasive cleaner. Use
the clean damp paper towel to wipe and a small amount of soap if necessary. Dry the
instrument thoroughly after cleaning.
This unit is a sealed instrument, except the battery, it contains no user serviceable
parts. Open other parts of the instrument will void the warranty.

Limited 90 Day Warranty
KZYEE makes every effort to assure that its products meet high quality and durability
standards, and warrants to the original purchaser that this product is free from
defects in materials and workmanship for the period of 90 days from the date of
purchase. This warranty does not apply to damage due directly or indirectly, to
misuse, abuse, negligence or accidents, repairs or alterations outside our facilities,
criminal activity, improper installation, normal wear and tear, or to lack of
maintenance. We shall in no event be liable for death, injuries to persons or property,
or for incidental, contingent, special or consequential damages arising from the use
of our product. Some states do not allow the exclusion or limitation of incidental or
consequential damages, so the above limitation of exclusion may not apply to you.
THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES,
EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY
AND FITNESS.
To take advantage of this warranty, the product or part must be returned to us with
transportation charges prepaid. Proof of purchase date and an explanation of the
complaint must accompany the merchandise. If our inspection verifies the defect, we
will either repair or replace the product at our election or we may elect to refund the
purchase price if we cannot readily and quickly provide you with a replacement. We
will return repaired products at our expense, but if we determine there is no defect, or
that the defect resulted from causes not within the scope of our warranty, then you
must bear the cost of returning the product.
This warranty gives you specific legal rights and you may also have other rights
which vary from state to state.