Velleman DVM13MFC2 Manual de usuario descargar pdf (Pagina 5)

DVM13MFC2 VELLEMAN

a. Example 1: Measuring an analogue handset

Connect the test cable with the input from channel B and set the FUNCTION key to the 1-step position. Select the

gate time (adjust manually from 100 msec to 10 sec). The LED display will read:

b. Example 2: Measuring a 30Mhz intercom emission frequency

Set the FUNCTION to the 2-step position and select the gate time (adjust manually from 100 msec to 10 sec). The

LED display will read:

c. Example 3: Measuring a self-oscillating frequency (e.g. from a telephone, intercom etc.)

Set the FUNCTION key to the 2-step position. Connect one end of a cable with 5pF capacitance to the red clamp;

use the other end to measure the frequency by touching the contact point.

6. Warnings

• When measuring a high-voltage or strong RF signal, make sure that the cables are in series and have a large

capacitance to avoid damage.

• Press the RESET button once to reset the device or turn off the device in case the device is not working

appropriately.

• When there is no input signal, the display may not necessarily read “0”. This is absolutely normal and does not

affect the measurements or the accuracy.

• Do not expose the device to extreme temperatures, humidity, dirt, dust etc. Do not open the device to avoid lethal

electroshocks.

• A strong interference will reduce the sensitivity when measuring.

7. Technical Specifications

Channel A (0.01Hz ~ 50MHz)

Frequency Range DC couple 0.01Hz to 100Hz

AC couple 100Hz to 50MHz

Sensitivity AC: 100Hz ~ 50MHz < 80m Vrms

DC: 0.01Hz ~ 1Hz ≤ 500m Vp-p

1Hz ~ 100Hz ≤ 80m Vrms

Impedance 1 Mohms

Attenuator X1, X20

Max. Safety Voltage 30V (DC/AC peak)

Channel B (50MHz ~ 2.4GHz)

Frequency Range from 50MHz to 2.4GHz

Sensitivity 50MHz ~ 1.2GHz ≤ 50m Vrms

1.2GHz ~ 2.4GHz > 80m Vrms

Coupling AC only

Impedance 50 ohms

Max. Safety Voltage 3V

step

900MHz

step

30MH

1 2 3 4 5 6 7 8 9 10 ... 22 23

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Velleman DVM13MFC2 Manual de usuario Pagina 5