VOLTCRAFT VC-337 - Page 45

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Follow the steps below to measure AC currents (A ) :
• Turn on the DMM using the rotary switch (3) and select the measuring
function “A
” and the expected measuring range (40A/4A). “A”
and the AC symbol AC will appear on the display.
• The display is automatically set to zero when the current clamp is
closed.Ifthereisastrongmagneticeldthataffectsthereading,use
the relative value function (“REL”).
• Press the current clamp opening lever (10) to open the current clamp.
• Surround the conductor that you want to measure and close the cur-
rent clamp. Position the conductor in the middle of the clamps.
• The measured current is indicated on the display.
• After taking a measurement, remove the current clamp from the
measured object and switch off the DMM. Turn the rotary switch to
the “OFF” position.
Measurement of alternating currents with 400 Hz low-pass lter
(VFC)
Thecurrentclampisequippedwitha400Hzsoftwarelow-passlterthat
suppressesnoiseabove400Hz.Thelow-passltercanbeswitchedon
in the AC range if necessary.
For AC measurement with low-pass lter, proceed as follows:
• Switch on the current clamp on the rotary switch and select the desired measuring range (4 A / 40 A ).
• Pressandholdthe“SELECT”button(4)forabout2secondstoactivatethelow-passlter.3beepssoundandthe
LCD display shows “UFC” for a moment. Then, the symbol “VFC” (P) appears in the display.
• Perform the measurement as described in the section “Measurement of Alternating Currents (A
)”, steps
3 to 5.
• Todeactivatethelow-passlter,pressandholdthe“SELECT”buttonforabout2seconds.Abeepsoundsandthe
LCD display shows “End” for a moment.