Velleman DVM990BL - Manual (Page 12)

DVM990BL VELLEMAN 11
NOTE:
1.
At the low capacitor range, the reading will include the small residual
value of the test leads. It will not influence the accuracy of the
measurement.
2. It takes time for the reading to become steady when measuring a high
capacitance.
4.8. MEASURING
TEMPERATURE
4.8.1. Set the rotary switch to the °C position.
4.8.2. The 'LCD' display will show the current ambient temperature.
4.8.3. To measure temperature with a thermocouple, the temperature probe
for this meter can be used. Insert the "K" type thermocouple into the
temperature measuring socket on the front panel and bring the
thermocouple probe into contact with the object to be measured.
4.8.4. You can see the reading on the LCD.
4.9. MEASURING
FREQUENCY
4.9.1. Connect the black test lead to the COM socket and the red test lead to
the V/
Ω
socket.
4.9.2. Set the rotary switch to the desired 20kHz range position.
4.9.3. Connect the test leads across the source or load under test.
4.9.4. You can see the reading on the LCD.
NOTE:
1.
Readings can be done at input voltages above 10Vrms, but the
accuracy is not guaranteed.
2. In noisy environments, it is preferable to use shielded cable to
measure small signals.
4.10. DIODE
TEST
4.10.1. Connect the black test lead to the COM socket and the red test lead to
the V/
Ω
socket. (The polarity of the red lead is "+").
4.10.2. Set the rotary switch to the
position.
4.10.3. Connect the red lead to the anode, and the black lead to the cathode
of the diode under test.
4.10.4. You can see the reading on the LCD.