Digital Multimeter DT-830B
The Gadget Queen (www.thegadgetqueen.com.au)
Page 1
Operating instructions
AC voltage measurement
- Connect the red lead to "VΩmA" jack and the black test lead to the "COM" jack.
- Set the rotary switch at the desired V~ position.
- Connect the test leads across the source or load being you want to measure and
read the voltage value on the LCD display.
DC voltage measurement
- Connect the red test lead to the "VΩmA” jack and the black test lead to the "COM”
jack.
- Set the rotary switch at the desired position. If the voltage to be measured is not
known, set the range switch at the highest range position and then reduce it until a
satisfactory resolution is obtained.
- Connect the test leads across the source or load being measured. Read the voltage
value and polarity on the LCD display.
DC current measurement
- Connect the red test lead to the "VΩmA” jack and the black lead to the "COM” jack.
For measuring currents between 200mA and 10A, insert the red lead into the "10A”
(unfused) jack.
- Set the rotary switch at desired position.
- Open the circuit in which the current is to be measured, and connect test leads
in
series
with the circuit.
- Read the current value on the LCD display along with the polarity of red lead
connection.
Resistance measurement
- Connect the red test lead to "VΩmA” jack and the black lead to "COM” jack. The
polarity of red lead is positive "+” in this mode.
- Set the rotary switch at desired range position.
- Connect the test leads across the resistance to be measured and read the LCD
display.
Note: If the resistor being measured is connected to a circuit, turn off power and
discharge all capacitors before applying measurements!
Transistor test
Before attempting to insert transistors into the socket for testing, always be sure
that test leads have been disconnected from any measurement circuits. Also,
components should not be connected to the hFE socket when making voltage
measurements with the test leads!
- Set the rotary switch to the "hFE” position.
- Determine whether the transistor under testing is NPN or PNP type and locate the
emitter, base and collector leads.
- Insert the leads into the proper holes of the hFE socket on the front panel.
