Kaiweets HT118A User manual

True-RMS Multimeter
Model: HT118A

Table of Contents
Statement............................................................................. 1
Safety Instructions...................................................... 2
Symbols........................................................................ 5
Multimeter Features............................................................6
FUNC. keys..................................................................7
Data hold...................................................................... 7
MIN MAX Measurement............................................ 7
Backlight....................................................................... 7
Flashlight...................................................................... 7
Sleep Mode.................................................................. 8
LED-Terminal Indication.............................................8
High voltage prompt function.................................... 8
Measurement Operation.................................................... 9
DC/AC voltage measurement................................... 9
DC/AC voltage mV measurement..........................10
Frequency/Duty measurement............................... 11
DC/AC current measurement................................. 12
Resistance measurement........................................13
Continuity measurement..........................................14
Diode measurement................................................. 15
Capacitance measurement..................................... 16
NCV test..................................................................... 17
Live test...................................................................... 18

Temperature Measurement..................................... 19
General Specifications..................................................... 20
Accuracy Specifications...................................................21
DC voltage..................................................................21
AC voltage..................................................................22
DC current.................................................................. 22
AC current.................................................................. 23
Resistance..................................................................23
Capacitance............................................................... 24
Frequency/Duty......................................................... 24
Diode test................................................................... 26
Continuity test............................................................26
Temperature...............................................................26
Maintenance...................................................................... 27
Clean...........................................................................27
Replace Battery and Fuse.......................................27

1
Statement
In accordance with the international copyright law, without
permission and written consent, do not copy the contents of this
manual in any form (including storage and retrieval or translation
into languages of other countries or regions). The manual is
subject to change in future edition without prior notice.
“Caution” mark refers to the condition and operation which
may cause damage to the instrument or equipment.
It requires that you must be careful during the execution of
the operation. If incorrectly perform the operation or do not
follow the procedure, it may damage the instrument or
equipment. In the circumstances that such conditions are not
met or not fully understood, please do not continue to perform
any operation indicated by the caution mark.
“Warning” mark indicates the condition and operation which
may cause danger to users.
It requires that you pay attention during the execution of
this operation. If incorrectly perform the operation or do not
follow the procedure, it may result in personal injury or
casualties. In the circumstances that such conditions are not
met or not fully understood, please do not continue to perform
any operation indicated by the warning mark.

2
Safety Instructions
The instrument is designed according to the requirements of the
international electrical safety standard IEC61010-1 for the safety
requirements of the electronic testing instruments. The design
and manufacture of instruments strictly comply with the
requirements of IEC61010-1 CAT.III 1000V over voltage safety
standards and pollution level 2.
Warning
In order to avoid possible electric shock or personal injury
and other safety accidents, please abide by the following
specifications:
Please read this manual carefully before using the
instrument, and pay special attention to safety warning
information.
Strictly observe the operation of this manual and use this
instrument. Otherwise, the protection function of the
instrument may be damaged or weakened.
Please be careful if the measurement exceeds 30V AC true
RMS, 42V AC peak or 60V DC. There may be danger of
electric shock at this kind of voltage
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.

3
Before using the instrument, please check whether there is
any crack or plastic damage in the instrument case. If you do,
do not use it again.
Before using the instrument, please check whether 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 it shows low battery indicator, please replace the
battery in time in case of any measurement error.
Do not use the instrument around explosive gas, steam or in
wet environment.
When using the probe, please put your fingers behind the
finger protector of the probe.
When measuring, please connect the zero line or the ground
line firstly, then connect the live wire; but when disconnecting,
please disconnect the live wire firstly, then disconnect the
zero line and ground line.
Before opening the outer cabinet or battery cover, please

4
remove the probe on the instrument. Do not use the
instrument in the circumstances that the instrument is taken
apart or battery cover is opened.
It only meets the safety standards when the instrument is
used together with the supplied probe. If the probe is
damaged and needs to replace, the probe with same model
number and same electrical specifications must be used for
replacement.

5
Symbols
High voltage warning AC (Alternating Current)
AC and DC DC (Direct current)
Warning; Important information Earth ground
Fuse Low Battery
Double insulated
Product complies with all relevant European laws
Do not dispose of this product as unsorted municipal waste.
CAT. II
Product is suitable for testing and measuring circuits directly connected
to power points (sockets and similarities) of low voltage power
installations.
CAT. III
Product is suitable for testing and measuring circuits connected to the
distribution part of low voltage power supply devices in buildings.
CAT. IV
Product is suitable for testing and measuring circuits connected to the
power supply of low voltage power installations in buildings.

6
Multimeter Features
A new generation of high performance digital multimeter.
The new display and function layout show clearer and better
user experience. It is the best choice for professional
electricians, enthusiasts or families.
1NCV probe
2Flashlight
3Red / green light
4LCD display (Dual color
backlight)
5Function keys
6Rotary Switch
7Other measurement input
terminal
8COM Input terminal
9mA、uA Input terminal
10 10A Input terminal

7
FUNC. keys
When there are multiple measuring functions on a gear, the
FUNC. key switch function is adopted.
Data hold
Press”HOLD” key, enter/cancel data hold mode.
MIN MAX Measurement
Press the MAX/MIN key to enter the MIN MAX mode and then
press the loop to display the maximum and minimum values.
Press and hold for more than 2 seconds to exit the MIN MAX
mode.
Backlight
Press “ ”key, turn on/off the backlight. After about 10
seconds of inactivity it will automatically shut down.
Flashlight
Press key and keep more than 2 seconds to turn on/off the
flashlight.

8
Sleep Mode
The Meter automatically enters sleep mode if there is no
operation for 15 minutes to save battery energy. Pressing any
button or turning the rotary switch awakes the Meter.
If you press the "FUNC." button and turn on the meter, the
sleep mode will be deactivated. After turning off the meter,
The Meter will restore Sleep Mode after power off.
LED-Terminal Indication
Turn on the Meter and switch the gear, the corresponding light
on the terminal flashes to imply the correct input terminal.
High voltage prompt function
When the measuring voltage is greater than 80V or the
measuring current greater than 1A, the orange backlight will light
up, prompting the users to be careful.

9
Measurement Operation
DC/AC voltage measurement
1) Turn the knob to “ ” and switch DC/AC voltage function by
"FUNC." key
2) Insert the red probe in “ ” terminal, insert the black
probe in “COM” terminal.
3) Connect the probe to the measured circuit (connect to the
measured power supply or circuit in parallel), measure the
voltage.
4) Read the measurement result on the screen, when
measuring AC voltage the frequency is displayed
simultaneously.
WARNING
The voltage above DC1000V or AC750V can’t be measured; otherwise
the instrument may be damaged.
Pay special attention to safety when measuring high voltage to avoid
electric shock or personal injury.
Always test known voltage with the meter before use to confirm the
instrument function is intact.
Note: When the voltage is greater than 80V, the orange backlight will
light up.

10
DC/AC voltage mV measurement
1) Turn the knob to “ ” and switch AC/ DC voltage function by
"FUNC." key
2) Insert the red probe in “ ” terminal, insert the black
probe in “COM” terminal.
3) Contact the probe to the measured circuit (connect to the
measured power supply or circuit in parallel), measure the
voltage.
4) Read the measurement result on the screen, when
measuring AC voltage the frequency is displayed on LCD
simultaneously.
WARNING
The voltage above DC250V can’t be measured; otherwise the
instrument may be damaged.
Pay special attention to safety when measuring high voltage to avoid
electric shock or personal injury.
Test the known voltage with the meter before use, confirm the instrument
function is intact.

11
Frequency/Duty measurement
1) Turn the knob to “Hz%” and switch Frequency or Duty
function by "FUNC." key
2) Insert the red probe in “ ” terminal, insert the black
probe in “COM” terminal.
3) Contact the probe to the measured circuit (connect to the
measured power supply or circuit in parallel), measure the
frequency and duty.
4) Read the measurement result on the screen.
WARNING
The voltage above 10V can’t be measured; otherwise the instrument
may be damaged.
Pay special attention to safety when measuring high voltage to avoid
electric shock or personal injury.
Test the known voltage with the meter before use, confirm the instrument
function is intact.
Caution: To avoid damaging instruments or equipment, do not
enter frequency or duty cycle signal greater than 10V valid value.

12
DC/AC current measurement
1) Turn the knob to “ ” or “ ” or “ ” and switch AC or DC
current function by "FUNC." key
2) Insert the red probe in “mA” terminal or “10A” terminal, insert
the black probe in “COM” terminal.
3) Disconnect the power of the tested circuit; connect the meter
to the circuit under test, then turn on the circuit power supply.
4) Read the measurement result on the screen. When
measuring AC current, the frequency is displayed on LCD
simultaneously.
WARNING
The voltage above 250V can’t be measured; otherwise the instrument
may be damaged.
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; confirm the instrument
function is intact.
When measuring large current, continuous measurement should be no
longer than 15 seconds
Caution
To avoid damaging the instrument or equipment, check the fuse before
measuring and ensure that the measured current does not exceed the
rated maximum current; use the correct input.

13
Resistance measurement
1) Turn the knob to “ ” and switch resistance function by
"FUNC." key
2) Insert the red probe in “ ” terminal, insert the black
probe in “COM” terminal.
3) Contact the probe to the measured circuit or resistance,
measure the resistance.
4) Read the measurement result.
1) WARNING
When measuring resistance on the line, disconnect the power supply
and discharge all the high-voltage capacitors. Otherwise, the instrument
may be damaged and may be struck by electric shocks.

14
Continuity measurement
1) Turn the knob to “ ” and Switch to Continuity function by
"FUNC." key.
2) Insert the red probe in “ ” terminal, insert the black
probe in “COM” terminal.
3) Contact the probe to the measured circuit or resistance,
4) If the resistance or circuit of the measured resistance is less
than 30Ω, the buzzer will on and the green indicator lights up
at the same time; when the resistance is about between 30Ω
to 60Ω, the red indicator lights up; LCD displays the
resistance.
1) WARNING
When measuring Continuity on the line, disconnect the power supply
and discharge all the high-voltage capacitors. Otherwise, the instrument
may be damaged and may be struck by electric shocks.

15
Diode measurement
1) Turn the knob to “ ” and Switch to diode measurement
function by "FUNC." key.
2) Insert the red probe in “ ” terminal, insert the black
probe in “COM” terminal.
3) Touch the diode anode with the red probe, the black probe
contacts the diode cathode.
4) Read the measurement result on the screen.
2) WARNING
When measuring diode on the line, disconnect the power supply and
discharge all the high-voltage capacitors. Otherwise, the instrument may
be damaged.

16
Capacitance measurement
1) Turn the knob to “ ”.
2) Insert the red probe in “ ” terminal, insert the black
probe in “COM” terminal.
3) Contact the probe to the measured circuit or Capacitance,
measure the resistance.
4) Read the measurement result on the screen.
5) WARNING
When measuring Capacitance on the line, disconnect the power supply
and discharge all the high-voltage capacitors. Otherwise, the instrument
may be damaged and may be struck by electric shocks.

17
NCV test
1) Turn the knob to the “ ” and Switch to NCV test function by
"FUNC." key. Meter will display "NCV".
2) Then NCV probe gradually approaches the detected point.
3) When the meter senses weak AC signals, the green indicator
lights up, at the same time, the beeps send out slow dips.
4) When the meter senses strong AC signals, the red indicator
lights up, at same time, the beeps send out fast dips.
3) WARNING
In order to avoid possible accidents such as electric shock or personal
injury, please follow the safety regulations.