3B Sientific U17450 Hoja de instrucciones - Página 4

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3.3.1 Operating mode: electrical

3.3.2 Operating mode: electrical

zero-point center

• Set the slide switch (4) to the "

setting.

• Using the rotary switch (1) select

the corresponding measurement

range "V ...".

• The needle should now be posi-

tioned in the center of the scale.

• Connect the multimeter and take

a reading from the lower scale.

3.4 Measuring alternating

voltage, directly up to 300 V

• Set the slide switch (4) to "

setting.

• Using the rotary switch (1) select

the corresponding measurement

range "V

• Connect the multimeter and take

a reading from the upper scale.

• To reduce the effects of the fre-

quency, connect the socket "⊥ ⊥ ⊥ ⊥ ⊥ "

directly to ground or to the point

with the lowest potential with re-

spect to ground.

3.5 Measuring AC voltage with

superimposed DC voltage

• With the aid of a capacitor (recom-

mended: 4.7 µF/630 V) it is possi-

ble to isolate DC-voltage compo-

nents in an amplifier output stage,

for example. The resultant mea-

surement error is less than 0.2%

at a measurement frequency of

50 Hz.

• Proceed with the measurement as

stated in point 3.4.

• Measurement of the DC voltage

components is performed as de-

scribed under 3.3.

• To avoid overloading, the set mea-

surement range must be greater

than the initially determined DC

voltage components.

• Caution: before switching to a low-

er measurement range both volt-

age components must be checked.

3.6 Current measurement

• When performing current mea-

surements the multimeter must

be connected in series with the

load in the circuit, which has the

lowest potential with respect to

ground.

3.6.1 DC measurement, directly

_ +

3.6.1.1 Operating mode: electrical

zero-point left

• Switch the slide switch (4) to the

" setting.

• Using the rotary switch (1), select

the corresponding measurement

range "A ...".

• Connect the multimeter take a

reading from the upper scale.