Kaiweets KM100 User manual

KM100
DIGITAL MULTIMETER
DIGITAL MULTIMETER
Contact us: [email protected]
KM100

Contents
Introduction.................................................. 1
Safety Operation......................................... 1
Meter Diagram............................................. 3
Production Information............................. 4
Symbol Meaning....................................................4
Button Functions....................................................5
Auto Power Off.......................................................6
Measurement Operation........................... 6
DC/AC voltage measurement..............................6
DC current measurement.....................................7
Resistance measurement.................................... 8
Continuity measurement...................................... 9
Diode measurement........................................... 10
Technical Specifications.........................12
Accuracy Specifications.........................13
DC Voltage........................................................... 13
AC Voltage........................................................... 14
DC Current........................................................... 14
Resistance............................................................15

Continuity&Diode.................................................15
Replace Battery and Fuse...................... 16
Replace Battery................................................... 16
Replace Fuse.......................................................17
Maintenance...............................................17
Clean.....................................................................17

1
Introduction
Thank you for purchasing the KAIWEETS KM100
2000 Counts Digital Multimeter. The Digital Multimeter
is designed to be safely and accurately used by
professionals in a commercial setting or weekend
DIYer’s that need a little more utility from their
standard digital multimeter. This manual provides all
sa f e t y in f o r m a t i o n , op e r a t io n in s t r u c t i o n ,
specifications and maintenance for the meter. The
instrument performs AC/DC Voltage, DC Current,
Resistance, Continuity, Diode Measurement.
NOTE: Fully read and understand this manual
before using this Digital Multimeter.
Safety Operation
WARNING:
To avoid possible electric shock or personal injury and
to avoid possible damage to the meter or to the
equipment being tested, adhere to the following rules:
Please read this manual carefully before using the
instrument, and pay special attention to the safety
warning information.
Before using the meter, inspect the exterior meter.
Look for cracks or missing plastic. Do not use the
meter if it is damaged.
Before using the instrument, please check whether

2
the probe is cracked or damaged. If so, please
replace the same type and the same electrical
specifications.
The instrument shall be used in accordance with
the specified measurement category, voltage or
current rating.
Please comply with local and national safety code.
Wear personal protection equipment (such as
approved rubber gloves, masks and flame
retardant clothes, etc.) to prevent being damaged
by electric shock and electric arc due to exposed
hazardous live conductor.
When the Meter is working at an effective voltage
over 60V in DC or 30V rms in AC, special care
should be taken because there is a danger of
electric shock.
Do not apply more than the rated voltage, as
marked on the meter, between the terminals or
between any terminal and grounding.
By measuring the known voltage to check whether
the meter work is normal, if it is not normal or
damaged, do not use it again.
Use the proper terminals, function, and range for
your measurements.

3
Meter Diagram

4
Production Information
Symbol Meaning
AC (Alternating Current)
DC (Direct Current)
Continuity
Diode Test
Earth Ground
Fuse
Double Insulated
Warning: Important Information
CAT. III
Class III measurement is suitable for
testing and measuring circuits
connected to the distribution part of low
voltage power supply devices in
buildings.

5
Button Functions
Use this switch to select the desired
function and range for measurement.
Press this button to lock the
measurement results, press again to
cancel it.
Long press to turn on the backlight,
long press again to turn off it.
Plug the black test lead into this
terminal.
When the current is less than 200mA,
plug the red test lead in this terminal.
When the current is between 200mA
and 10A, plug the red test lead into this
terminal.

6
Auto Power Off
After turn on the meter, “ ” icon shows on display,
it means the meter will auto power off after 15
minutes without operation, press any key to restore
the working state of the instrument.
Long press “ ” button and turn on the meter,
the automatic shutdown function will be canceled.
“ ” will not display on the screen.
Measurement Operation
DC/AC voltage measurement
1. Turn the knob to “V~” or “V⎓” and select the
appropriate range;
Note: If measuring an unknown voltage, set the
maximum range and reduce it until a satisfactory
reading is obtained.
2. Insert the red probe in “ ” socket, insert the
black probe in “ ”;
3. Connect to the measured power supply or circuit in
parallel, measure the voltage;
4. Read the measurement result on display.
WARNING
Do not measure power supply or circuit greater
than 600V.
Pay attention to safety when measuring high

7
voltage to avoid electric shock or personal
injury.
Measure the known voltage or current before
use to ensure that the instrument functions
well.
DC current measurement
1. Disconnect the circuit to be tested;
2. Turn the knob to “A⎓” and select the appropriate
range;
Note: If the value of current is unknown, use the
maximum measurement position (10A) and reduce
the range until proper readings are obtained.
3. If the current to be measured is less than 200mA,
insert the red test lead into the “ ” socket. If the
current is between 200mA and 10A, insert the red test
lead into the “10A’’ socket, insert the black probe in
“COM” socket;
4. Connect the red and black test leads in series to
the circuit, then turn on the circuit power supply;
Note: For 10A measurements, only take readings for
up to 10 seconds and allow 15 minutes between tests.
This prevents the device from overloading and
overheating.
When testing the current, there must be a load in the
circuit. Do not connect the multimeter in series with

8
the circuit without a load to measure.
5. Read the measurement result on display. If “OL” is
displayed, it is out of range, select higher range.
WARNING
Pay special attention to safety when measuring
high voltage to avoid electric shock or personal
injury.
Test the known current with the meter before
use to confirm the instrument function is intact.
Resistance measurement
1. Turn the knob to resistance shift and select the
appropriate range;
Note: During measuring an unknown Resistance, use
the maximum range and reduce it until a satisfactory
reading is obtained.
2. Insert the red probe in “ ” socket and insert the
black probe in “COM” socket;
3. Place the test leads at the both ends of the circuit
or resistance to measure and maintain strong contact;
4. Read the measurement result on display.

9
NOTE:
If the measured value is equal to the nominal
resistance of the resistor or within the range of
error, the resistor works correctly;
If there is a large deviation between the nominal
resistance and the resistance, the resistor is
damaged;
If the measured value is infinite (open circuit),
zero (short circuit), or unstable, it means the
resistor is damaged and it can’t be used.
WARNING
Before measuring in-circuit resistance, be sure
that the circuit under test has all power
removed and all capacitors are fully discharged.
Otherwise, the instrument may be damaged and
may be struck by electric shocks.
Continuity measurement
1. Deenergize the circuit you will be testing;
2. Turn the knob to “ ” and the icon “ ” is
displayed on screen;
3. Insert the red probe in “ ” socket and insert the
black probe in “COM” socket;
4. Touch the test lead tips together to check if they

10
are connected normally, the buzzer will sound
continuously;
5. Contact the probe to the measured circuit,
measure the resistance;
6. If the resistance or circuit of the measured
resistance is less than 50Ω, the built-in beep will
sound and the value will be displayed on the LCD
screen;
7. If there is no continuity, the beep will not sound and
“OL” will be displayed on the screen, which means the
resistance is damaged.
WARNING
Before measuring in-circuit resistance, be sure
that the circuit under test has all power
removed and all capacitors are fully discharged.
Otherwise, the instrument may be damaged and
may be struck by electric shocks.
Diode measurement
1. Turn the knob to “ ” and the icon “ ” is
displayed on screen;
2. Insert the red probe in “ ” socket, insert the
black probe in “COM” socket;
3. Connect the red test lead to the positive end of the

11
diode and the black test lead to the negative end, a
beep sounds if connected the diode normally.
Note: Generally the positive end of the diode is the
longer one.
4. Read the result on the LCD display;
5. If there is no reading, switch the test leads to the
opposite ends of the diode and measure again.
WARNING
To avoid damage to the meter or the measured
object, disconnect the circuit power and
discharge all the high-voltage capacitors before
testing.

12
Technical Specifications
Environmental
conditions
CAT.III 600V
Pollution level：2
Altitude < 2000m
Working environment: 0~40°C
(<80% RH, <10°C non
condensing).
Storage environment::-10~60°C
(<70% RH, remove the battery).
Temperature
coefficient
0.1accuracy/°C
(<18°C or >28°C)
MAX. Voltage
600V
Fuse
protection
mA：F200mA/250V fuse
10A：F10A/250V fuse
Sampling rate
About 3 times/second
Over range
indication
It displays “OL”
Low battery
indication
“ ” will be displayed
Input polarity
indication
Automatically displays “”
Power
requirement
2 x 1.5V AAA batteries

13
Accuracy Specifications
The accuracy is applicable within one year after the
calibration.
Reference condition: Environment temperature: 18°C
to 28°C; Relative humidity: ≤80%
Accuracy: (reading + word)
DC Voltage
Range
Resolution
Accuracy
200mV
0.1mV
±(1.0% reading+5)
2V
0.001V
20V
0.01V
200V
0.1V
600V
1V
Overload protection: 600V
Maximum input voltage: 600V

14
AC Voltage
Range
Resolution
Accuracy
20V
0.01V
±(1.0% reading+5)
200V
0.1V
600V
1V
Overload protection: 600V
Maximum input voltage: 600V
Frequency Response: 40Hz ~ 400Hz
DC Current
Overload protection: mA: F200mA/250V fuse
A: F10A/250V fuse
Maximum input current: mA: 200mA, A: 10A
When measuring large current, continuous
measurement should be no longer than 15
seconds.
Range
Resolution
Accuracy
20mA
0.01mA
±(1.5% reading+5)
200mA
0.1mA
10A
0.01A

15
Resistance
Range
Resolution
Accuracy
200Ω
0.1Ω
±(1.2% reading+5)
2kΩ
0.001kΩ
20kΩ
0.01kΩ
200kΩ
0.1kΩ
2MΩ
0.001MΩ
20MΩ
0.01MΩ
Overload protection: 250V
Continuity&Diode
The resistance is
<50, the buzzer
will sound
Open circuit voltage is
about 2V
Overload
protection:250V
Displays the
approximate
forward voltage
of the diode.
Reverse DC voltage is
about 2V
Overload
protection:250V

16
Replace Battery and Fuse
Replace Battery
1. Turn off the power supply of the instrument and
remove the probe on the instrument;
2. Remove the screws fixing the battery cover,
remove the battery cover;
3. Remove old batteries, replace them with fresh
batteries (AAA, 1.5V x 2). Please place the batteries
according to the positive and negative polarity marks
inside of the battery cover;
4. Install the battery cover to its original position, fix
and lock the battery cover with screws.
WARNING
To prevent electric shock or personal injury
caused by error reading, please replace the
battery promptly when the battery power is low.
Do not make the battery short circuit or reverse
battery polarity to discharge the batteries.
To ensure safe operation and product
maintenance, when the instrument will not be
used for an extended period of time, please
remove the batteries.

17
Replace Fuse
1. Turn off the power supply of the instrument and
remove the probes on the instrument.
2. Remove the screws on the 4 corners fixing the
back cover and remove the back cover.
3. Remove the burnt fuse, replace with new fuse of
the same specifications (mA：F200mA/250V fuse,
10A ：F10A/250V fuse), and ensure that the fuse is
clamped in the safety clip.
4. Install the back cover, fix and lock it with screws.
Maintenance
Clean
If there’s dust on the terminal or the terminal is wet, it
may cause measurement error. Please clean the
instrument according to the steps below:
1. Turn off the power supply of the instrument and
remove the test probe;
2. Turn over the instrument and shake out the dust
accumulated in the input socket. Wipe the outer
cabinet with a damp cloth and mild detergent, do not
use abrasive or solvent. Wipe contacts in each input
socket with a clean cotton swab soaked in alcohol.