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Idiomas disponibles
Idiomas disponibles
5. Back Panel Description
1. Power Input with Fuse
2. Select the power supply
3. OSC.OUT
4. GND Terminal
6. Performing Measurements
Start by examining the device and all necessary accessories for damage, contamination (e.g. dirt; grease, etc.) and
defects. Examine the test leads for cracked or frayed insulation and make sure the lead plugs fit snugly into the
instrument jacks. Do not perform measurements if there is a problem with any of these factors.
a) Frequency Measurement
1. Press the POWER button to activate the device.
2. Select the appropriate range with the FREQ. button.
3. Select the gate time with the G.TIME button.
4. Connect the input signal with BNC connector A or B on the front panel according to the intensity of the signal.
5. Put A.ATTN in the desired position. Press A.ATTN is the input signal > 300mV: it reduces the number of mistakes
since the triggering sensitivity of the input section is attenuated by a factor of 20.
6. Read the frequency on the display and note the unit of measurement.
b) Period Measurement
1. Press the POWER button to activate the device.
2. Select the period mode with the A.PERI. button.
3. Select the gate time with the G.TIME button.
4. Connect the input signal with BNC connector A on the front panel.
5. Put A.ATTN in the desired position. Press A.ATTN is the input signal > 300mV: it reduces the number of mistakes
since the triggering sensitivity of the input section is attenuated by a factor of 20.
6. Read the period time on the display and note the unit of measurement.
DVM13MFC
: Check whether the power source is compatible with the power requirements of
the device in order to protect the device from damage and the user from injury.
Only then should you connect the power cable and activate the device.
Disconnect the power cable, remove the test leads and cut off the input signal to
avoid electroshocks when you are replacing the fuse. Always replace the old fuse
with an identical one or one with the same specifications.
: The device can be powered by either 110Vac or 220Vac.
: This is the output connector for the oscillator. This connector provides a 10MHz
signal and may be used as a reference signal for another frequency counter.
Always respect the output impedance of 50Ω. when using the output signal
(10MHz).
4
VELLEMAN
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