Digital Multimeter DT-830B
The Gadget Queen (www.thegadgetqueen.com.au)
Page 2
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).
Before attempting to open the case, always be sure that test leads have been
disconnected from measurement circuits. Close the case and tighten the screws
completely before using the meter to avoid electrical shock hazard!
Specifications
The DT830B has a wide operating temperature: -20°C to 75° (32°F to 104°F) and a
storage temperature of: -10°C to 50°C (10°F to 122°F). The accuracy is guaranteed
to stay in the following limits for 1 year, when used at 23°C ± 5°C, less than 75%
relative humidity:
AC voltage
Frequency range: 45Hz to 450Hz.
Response: Average responding, calibrated in RMS of a sine wave.
Range Resolution
Accuracy
200V
100mV
±1.2 % of rdg ± 10 digits
750V
1V
±1.2 % of rdg ± 10 digits
Note: some models have a maximum input voltage of only 600V AC with an overload
protection of 600V DC or RMS AC for all ACV ranges.
DC voltage
Range Resolution
Accuracy
200mV 0.1mV
±0.5% of rdg ± 2 digits
2000mV 1mV
±0.5% of rdg ± 2 digits
20V
10mV
±0.5% of rdg ± 2 digits
