Home Decor DT830B Assembly instructions

OPERATOR’S
INSTRUCTION
MANUAL
DT830B
DIGITAL MULTIMETER
READ AND UNDERSTAND THIS MANUAL
BEFORE USING THE INSTRUMENT
Failure to understand and comply with the
WARNINGS and operating instructions can
result in serious or fatal injuries and/or
property damage.
WARNING

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General
This instrument is a compact pocket- sized 3 ½
digital multimeters for measuring DC and AC
Voltage, DC Current, Resistance and Diode,
transistor measurement. Low battery voltage
indication is provided. It’s ideal instruments for
use in fields, such as laboratory, workshop,
DIYers and home applications.
SPECIFICATIONS
Accuracies are guaranteed for 1 year, 23±5,
less than 80%RH
DC VOLTAGE
RANGE RESOLUTION ACCURACY
200mV 100uV ±(0.5% of rdg + 3D)
2000mV 1mV
20V 10mV
200V 100mV
1000V 1V ±(1.0% of rdg + 2D)
±(0.8% of rdg + 2D)
OVERLOAD PROTECTION: 220V rms AC for
200mV range and 1000V DC or 750V rms for all
ranges.
AC VOLTAGE
RANGE RESOLUTION ACCURACY
200V 100mV
750V 1V ±(1.2% of rdg +10D)
RESPONSE: Average responding, calibrated in
rms of a sine wave.

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FREQUENCY RANGE: 45Hz ~ 450Hz
OVERLOAD PROTECTION: 1000V DC or 750V
rms for all ranges.
DC CURRENT
RANGE RESOLUTION ACCURACY
2000uA 0.1uA ±(2.0% of rdg +2D)
2000uA 1uA
20mA 10uA
200mA 100uA ±(2.0% of rdg +2D)
10A 10mA ±(2.0% of rdg +10D)
±(1.8% of rdg +2D)
OVERLOAD PROTECTION: 500mA 250V fuse
(10A range unfused).
MEASURING VOLTAGE DROP: 200mV
RESISTANCE
RANGE RESOLUTION ACCURACY
200 Ω 100m Ω ±(1.0% of rdg +10D)
2000 Ω 1 Ω
20K Ω 10 Ω
200K Ω 100 Ω
2000K Ω 1K Ω
±(1.0% of rdg +4D)
MAXIMUM OPEN CIRCUIT VOLTAGE: 3.2V.
OVERLOAD PROTECTION: 15 seconds maxi-
mum 220Vrms.
OPERATING INSTRUCTIONS
WARNING
To avoid electrical shock hazard and/or

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damage of the instrument, do not
measure voltages that might exceed 500V
above earth ground.
Before the use of instrument, inspect test
leads, connectors and probes for cracks,
breaks, or crazes in the insulation.
DC & AC VOLTAGE MEASUREMENT
1. Connect red test lead to “VΩmA” jack, Black
lead to “COM” jack.
2. Set RANGE switch to desired VOLTAGE
position, if the voltage to be measured is not
known beforehand, set switch to the highest
range and reduce it until satisfactory reading
is obtained.
3. Connect test leads to device or circuit being
measured.
4. Turn on power of the device or circuit being
measured voltage value will appear on
Digital Display along with the voltage
polarity.
DC CURRENT MEASUREMENT
1. Red lead to “VΩmA”. Black lead to “COM”
(for measurements between 200mA and 10A
connect red lead to “10A” jack with fully
depressed.)
2. RANGE switch to desired DCA position.
3. Open the circuit to be measured, and
connect test leads INSERIES with the load

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in with current is to measure.
4. Read current value on Digital Display.
5. Additionally, “10A” function is designed for
intermittent use only. Maximum contact time
of the test leads with the circuit is 15
seconds, with a minimum intermission time
of seconds between tests.
RESISTANCE MEASUREMENT
1. Red lead to “VΩmA”. Black lead to “COM”.
2. RANGE switch to desired OHM position.
3. If the resistance being measured is connec-
ted to a circuit, turn off power and discharge
all capacitors before measurement.
4. Connect test leads to circuit being mea-
sured.
5. Read resistance value on Digital Display.
DIODE MEASUREMENT
1. Red lead to “VΩmA”, Black lead to “COM”.
2. RANGE switch to “ ” position.
3. Connect the red test lead to the anode of the
diode to be measured and black test lead to
cathode.
4. The forward voltage drop in mV will be
displayed. If the diode is reversed, figure “1”
will be shown.
TRANSISTOR hFE MEASUREMENT
1. RANGE switch to the hFE position.

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2. Determine whether the transistor is PNP of
NPN type and locate the Emitter, Base and
Collector leads. Insert the leads into the
proper holes of the hFE Socket on the front
panel.
3. The meter will display the approximate hFE
value at the condition of base current 10µA
and V
CE
2.8V.
BATTERY AND FUSE REPLACEMENT
Fuse rarely need replacement and blow almost
always as a result of operator error.
If “ ” appears in display, it indicates that the
battery should be replaced.
To replace battery & Fuse (500mA/250V) remove
the 2 screws in the bottom of the case, simply
remove the old, and replace with a new one. Be
careful to observe polarity.
CAUTION
Before attempting to open the case of the
instrument, be sure to disconnect test leads from
any energized circuits to avoid shock hazard.
ACCESSORIES
Operator’s instruction manual
Set of test leads
Gift box
9-volt battery, NEDA 1604 6F22 type.

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FRONT PANEL DESCRIPTION
1. FUNCTION AND RANGE SWITCH
This switch is used to select the function and
desired range as well as to turn on the
instrument.
To extend the life of this battery, the switch
should be in the “OFF” position when the
instrument is not in use.
2. DISPLAY
3 ½ digit, 7 segment, 0.5” high LCD.
3. “Common” JACK
Plug in connector for black (negative) test
lead.
4. “VΩmA” JACK
Plug in connector for red (Positive) test lead
for all voltage and resistance and current
(except 10A) measurements.
5. “10A” JACK
Plug in connector to red (positive) test lead
for 10A measurement.