Description
Digital Multimeter DT830B, DC Voltage, AC Voltage, DC Current, Resistance, Diode & Transistor test functions
Function Range Accuracy
DC Voltage 200mV-500V ± (0.5%+2dgt)
AC Voltage 200-500V ± (1.2%+10dgt)
DC Current 200uA-10A ± (1%+2dgt)
Resistance 200Ω-2MΩ ± (0.8%+2dgt)
Diode Test Yes
Transistor Test Yes
Power Supply 9V Battery 6F22
Display Size 16× 48mm
Maximum Display 1999
Products Size 126× 70× 24mm
Product Net Weight 150g
Color available Yellow, Black
Standard Accessories Test Lead, Battery, Manual
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.
The multimeter will show the approximate hFE value at the condition of base current 10µA and a Vce of 3V.
Diode test
- Connect the red test lead to "VΩmA” jack and the black lead to the "COM” jack. The polarity of red lead is positive "+”.
- Set the rotary switch at the diode test position.
- Connect the red lead to the anode of the diode to be tested and the black lead to the cathode of the diode.- The forward voltage drop of the diode will be displayed in mV. If the connection is reversed, only figure "1” should be displayed for a good diode.
Battery and fuse replacement
If the sign "BAT” appears on the LCD display, it indicates that the battery is old and should be replaced. Loosen the screws on the back cover and open the case. Replace the exhausted battery with a new one of the same type(9V 6F22 or NEDA 1604). The fuse needs replacement, open the case and replace the it with the same ratings (F250mA/250V).
No comments:
Post a Comment