Dawson Tools DDM350 Kullanıcı Kılavuzu - Sayfa 8

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1. Ncv (Non-Contact Voltage)

• If the result is an open circuit (or the measured circuit

resistance is higher than 200Ω) "0L" is displayed.

Frequency/Duty Cycle

Warning

Use caution when measureing high voltage circuits

to avoid electrical shock and injury. do not test

voltages higher than dc/ac 600v.

• Make sure the probe cap is screwed on if making CAT III

or higher measurements.

• Insert the black test lead or test clip in the "

• Set the rotary switch to the "Hz%" position; "Hz" is

displayed.

• Connect the probe tip of the meter and tip of the test

lead (or test clip) across the source or load for

measurement and read the measured frequency on the

display.

• Press "Hz%" to switch to duty cycle measurement; "%"

is displayed.

• Connect the probe tip of the meter and tip of the test

lead (or test clip) across the source or load for

measurement and read the measured duty cycle on

the display.

• Alternatively, while in AC voltage or AC current modes,

pressing the "Hz%" button will switch to frequency

mode.Press the button again to switch to duty cycle.

Press the button a third time to return to voltage/current

mode.

COM"

jack.

Data Hold

To hold a reading, press the"

reading will be held on the display. Press the button again

to return to normal reading.

Backlight

• Hold the"

"button for two seconds to turn on

backlight. The backlight will go off automatically after

10 seconds.

• Hold the"

"button again to manual turn off the

backlight.

Work light

While the meter is on in any position, hold the "

button to turn on the work light.Use this in areas that are

poorly illuminated to make measurements easier.

NCV (Non-Contact Voltage)

While the meter is on in any position, hold the "NCV"

button to turn check for the presence of voltage. Move

the top of the meter toward the voltage source and if the

voltage detected is >110VAC, the meter will beep and

the NCV indicator will flash.

NOTE:

Do not rely solely on NCV detection to determine the

presence of voltage in a conductor.Socket design,

insulation, interference, etc. can affect detection.

Auto Off

When not in use, the Meter will automatically turn off after

approx. 15 minutes. After auto off, press "FUNC" to turn

the power back on. The Meter will beep 5 times 1 minute

before and a long beep right as it turns off.

Hold the "FUNC" button while turning on the meter to

disable auto off.

"button and the current