Kaiweets KM312AB User manual

Smart Digital Multimeter
User Manual
7,
Contact us: [email protected]
(CEsRHSFC 2 A

Accuracy Specifications.................18
DC voltage. 18
AC voltage. 18
CONINUY...crrree 19
Frequency....
Maintenance... .20
Cleaning. .20
Install Batteries....
3 years Warranty..
H&E. 22

The meter conforms to IEC61010-1
CAT.Ill 600V over voltage safety standard
and pollution level 2
Awarning identifies conditions and
procedures that are dangerous to the
user.
AWarning
To prevent possible electrical shock, fire,
or personal injury:
Read all safety information before
you use the product.
Do not alter the product and use
only as specified, or the protection
supplied by the product can be
compromised.
Comply with local and national
safety codes. Use personal
protective equipment (approved
rubber gloves, face protection, and
flame-resistant clothes) to prevent
1

shock and arc blast injury where
hazardous live conductors are
exposed.
Limit operation to the specified
measurement category, voltage, or
amperage ratings.
Use Product-approved
measurement category (CAT),
voltage, and amperage-rated
accessories (probes, test leads,
and adapters) for all
measurements.
Do not touch voltages >30 V ac
RMS, 42 V ac peak, or 60 V dc.
Use the correct terminals, function,
and range for measurements.
Do ot use the product around
explosive gas, vapor, or in damp or
wet environments.
Do not operate the product with
covers removed or the case open.
2

Hazardous voltage exposure is
possible.
Examine the case before you use
the product. Look for cracks or
missing plastic. Carefully look at the
insulation around the terminals.
Disconnect power and discharge all
high-voltage capacitors before you
measure resistance, continuity,
capacitance, or a diode junction.
Do not apply more than the rated
voltage, between the terminals or
between each terminal and earth
ground.

[ ct Familiarization
Overview
@ Indicator Light @ Jacks
@ Display ® Flashlight
@ Buttons ® NCV Detection Sensor

Features
Button Function
Press and hold the ' ) *button
for about 2 seconds to tum on/off
the meer,
Press ' ' button to turn
onfoff backlight.
Press ' * button for about 2
seconds to turn on/off flashlight.
Press ' H' 1o turn on/ off data
holding.
Note: Data hold function is
invalid in NCV / Live test.
Power on is in SMART mode by
default.
Press the ' FUNC' button to
manual mode.
Then press again to switch
measurement modes.
Press and hold the ' FUNC ' key
for about 2 seconds to return to
the SMART (auto) mode.
In SMART Mode, the
*AUTO " signal will be
displayed on the screen.
5

Display
Symbol | Description
V | ACVoltage
V DC Voltage
Q Resistance Test
ol)) Audible Continuity Test
Hz Frequency Test
|
Live Live Wire Detection
¥ | LowBattery
Double insulated

Symbol Description
Auto power off
It will be on by default and
+ ) * symbol will be
displayed. Without any
operation in about 15
minutes, the meter will
automatically turn off.
Press and hold both "FUNC"
and* O button to tumn on
meter, the auto power off
function will be canceled.
The* () * symbol is not
displayed.

SMART (AUTO)
Measurement Mode
The Meter defaults to SMART mode. In
the SMART mode, the Meter can test DC
voltage, AC voltage, resistance, continuity,
it selects the range with the best
resolution automatically.

Turn on & Ready to use
1. Long press the ' © button for about
2 seconds to turn on the meter,
‘Auta will be displayed on the
screen, and the pointer will swing by
itself, indicating the SMART mode.
Insert the red probe into ' INPUT '
jack and the black probe into the
' COM " jack
Touch the red test lead and the
black test lead to check whether
they are normal. The buzzer wil
beep and the indicator light will be
on if normal.

Smart mode
Connect the test leads with both ends of
the circuit or resistance(in parallel), the
Meter automatically selects measurement
based on the input.
NOTE:
The minimum measurable voltage in
SMART mode is 0.8V.
rlo&
Volts AC Volts DC
E . - |+
(/\/\/vl’ S
Resistance Continuity

MAN
Mode
The Meter defaults to SMART mode. In the
SMART mode, press the ' FUNC ' button to
switch to manual mode and select function
from left to right.
Measuremen
ACIDC voltage measurement
1) Tum on & Ready to use ( look at
page 9)
2) Pressthe’ FUNC ' buttonto’ 7
setting,* DC * signal will be
displayed on the screen, indicating
DC voltage measurement.
3) Pressthe’ FUNC 'butionto’ ¥ *
setting, 'AC * signal wil be displayed
on the screen, indicating AC
voltage measurement.

Resistance measurement
1) Tum on & Ready to use ( look at
page 9)
2) Press' FUNC 'button to select " Q
gear." Q " signal will be displayed
on the screen, indicating the
resistance measurement.
NOTE:
* Do not test parallel circuits. The
accuracy of the measurement will be
affected.
* Do not directly measure the internal
resistance of micrometers,
galvanometers, batteries, and other
instruments.

Continuity test
1
2)
3)
4)
Turn on & Ready to use ( look at
page 9)
Press' FUNC ' bution to* *) *
seting, indicating the continuity
measurement.
Connect the test leads to both ends
of the circuit under test (in parallel).
If the resistance of the circuit or
resistor under test is less than 50Q
and the circuit is on position, the
buzzer will beep and an indicator
light will light up, and the screen will
display the measured resistance
value.

Frequency measurement
1) Tum on & Ready to use ( look at
page 9)
2) Pressthe’ FUNC ' buttonto' Hz'
setting, ' Hz ' signal will be
displayed on the screen, indicating
Frequency testing.
Non-contact voltage detection
1) Tumn on & Ready to use ( look at
page 9)
2) Pressthe' FUNC ' buttonto’ NCV'
setting, " - ' signal will be
displayed on the screen
3) Place the NCV probe closer to the
point to be tested gradually.

Live wire detection
1) Turn on & Ready to use ( look at page
9)
2) Press the ' FUNC ' button to ' Live '
setting, '-—-' signal will be displayed
on the screen.
3) Insert the red probe into the ' INPUT "
Jack and By
< P
remove the
black probe. e I
4) Touch the object under test with the
test lead point.
5) When the indicator light lights up that
means the measured position for the
fire line, please be careful!

When the Meter detects a weak signal,
the green indicator will light up, the
buzzer will beep in a slow tone, and * -
will be displayed on the screen.
e
| I
When the meter detects a strong signal,
the red indicator will light up, the buzzer
will beep in a fast tone, and ' -—-H ' will be
displayed on the screen.
Tl

ecirications
Display Counts: 4000 counts.
Power: 2 x 1.5V AAA batteries.
Sampling Speed: 3 times/second.
Environmental conditions:CAT. Ill 600V;
Pollution level 2; Altitude < 2000m
Working temperature and humidity:
0~40°C(<80% RH, <10°C non
condensing)
Storage temperature and humidity:
-10~60°C(<70% RH, remove the
battery)
Temperature coefficient:
0.1x accuracy /°C (<18°C or >28°C)
MAX. Voltage between terminals and
earth ground: 600V

Accuracy Specifications
Accuracy is specified for 1 year after
calibration, at operating temperatures of
18°C to 28°C, with relative humidity at 0%
10 80%.
Accuracy + ([% of Reading] + [Counts])
DC voltage
Range | Resolution | Acouracy
N 0,001V
2oV 001V |4(0.5% +3)
00V |04V
s00v | 1V
AC voltage
Range | Resolution | Acouracy
W 0001V | +(08%+3)
2oV 001V Frequency
Response:
400V |01V 40Hz~1kHz;
600V | 1V TRMS