830L+ Digital Multimeter Operation Manual
It’s very helpful that reading the operation manual to familiar with how to operate and maintenance the device
before operation.
1. Appearance Introduction
1-1. Display
3½LCD with 20mm high figure display.
1-2. Function Keys
SELECT: select or function under status. The device goes to sleep when stopping the operation for 15 minutes,
and re-powers on when press the function key or toggle the function switch.
HOLD/ :
⑴Data hold: press this key for a short time, the current measuring value of the device will be hold on the LCD and “H” symbol
will be displayed. Press it again can exit the HOLD mode.
⑵Backlight: press this key for more than 2 seconds to turn on the LCD backlight. The LCD backlight will be turned off
automatically after 15 seconds, or turned off by press this key again for more than 2 seconds.
1-3. Range rotary switch
This device is adapting rotary type switch, it combines function selection, range selection and power switch into
one role. To extend the battery life, the rotary switch should be turned to “OFF” position if the device is not be
used.
1-4. Input Terminal
“VΩmA”: Input terminal for Voltage, Resistance and less than 200mA current.
“COM”: Input terminal for common GND.
“10A”: Input terminal for more than 200mA current.
“NPN/PNP”: Input terminal for triode measurement.
1-5. The top of the LCD is non-contact voltage (NCV) detector area.
1-6. Holster and battery door.
2. General Features
Display: 3½LCD, Max. display 1999.
Polarity: Automatic polarity display.
Over-range display: Display “1”.
Working environment: (0~40)℃, relative humidity <75%.
Storage environment: (-15~50) ℃.
Battery: 2pcs 1.5V battery (“AAA” 7# battery).
Battery life: About 200 hours for alkaline battery, and 100 hours for carbon battery.
Dimension&Weight: 140mm(L) x 72mm(W) x 37mm(H), N.W: 195g
Low battery indication: LCD displays ” ”
3. Technical Features
Environment condition: Temperature: 23°C±5°C, Relative humidity: <75%. Accuracy: ± (a% × reading data + digits), one
year guarantee since production date.
3-1. DCV
Input impedance: 200mV range >40MΩ, other ranges is 10MΩ.
Overload protection: 600V DC/AC RMS.
3-2. DCA
Overload protection: 0.2A/250V fuse, 10A/250V fuse.
3-3. ACV
Frequency response: 40-400Hz.
Overload protection: 600V DC RMS or AC RMS.
Displaying: True RMS response (calibration based on sine wave RMS).
3-4. Resistance
Open circuit voltage: ＞500mV
Overload protection: 250V DC/AC peak value.
3-5. Transistor (hFE)
Base current is approx 15μA, Vce is
about 1.2V
3-6. Diode and Continuity Test
Diode forward voltage drop
Forward DC current: 0.8mA, open circuit
voltage: 2.2V.
When the resistance under
test is less than 50Ω, buzzer
sounds continuously.
Overload protection: 250V DC/AC peak value.
WARNING: Do not input any voltage at this range!
4. OPERATION
4-1. DCV measurement
A. Insert the red test lead into “VΩmA” terminal, and the black one into “COM”terminal;
B. Turn the rotary switch to DCV position and select the proper range, if users not sure about the range, then
select the highest range;
C. Connect the red and the black test leads to the tested circuit.
4-2. DCA measurement
A. Insert the black test lead into “COM”terminal and the red one into “VΩmA” terminal (less than 200mA) or
into ”10A”terminal (more than 200mA);
B. Turn the rotary switch to the proper DCA range position;
C. Connect the red and the black test leads to the tested circuit.
4-3. ACV measurement (TRMS)
A. Insert the red test lead into “VΩmA” terminal, and the black one into “COM”terminal;
