Making Measurements; Voltage Measurement - Conrad ME-32 Bedienungsanleitung

i) All other symbols which stand for the various units of meas-
urement:
AC = periodic quantity
DC = zero-frequency quantity
mV = millivolt (-3)
V = volt
mA = milliamp (-3)
A = amp
nF = nanofarad (-9)
°C = degrees Celsius
k Ω
= kiloohm (3)
M Ω
= megaohm (6)
5.4 Position of normal use
Always operate the multimeter in a position in which you can
read the liquid crystal display (LCD), with the digital display
facing upwards. There is a folding stand at the rear of the appli-
ance which ensures easier readability when the appliance is
stood upright.

6. Making Measurements

6.1Voltage measurement

Warning!
Under no circumstances exceed the maximum permitted input
values - 1000 V DC max. or 750 V AC rms max. - even when meas-
uring superimposed DC voltages (e.g. ripple voltage).
Do not touch circuits or parts of circuits when measuring vol-
tages in excess of 25 V AC rms or 35 V DC on them.
To measure direct or alternating voltages, proceed as follows:
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1. Connect the red measuring lead to the V/Ω socket (10) and the
black measuring lead to the COM socket (9)
2. Set the rotary switch (6) to "=~V". This selects "direct voltage
measurement" mode. The auto range function automatically
adjusts the measurement input to the applied direct voltage,
i.e. the required measuring range is automatically set.
3. Press the "=~/Ω(•)" button once if you want to measure an
alternating voltage. To measure a direct voltage, you only
need to press the button if you have previously been meas-
uring alternating voltages, otherwise the measurement input
is always automatically switched to measurement of zero-fre-
quency quantities (current or voltage).
4. Connect the test probes to the device under test (load, circuit
etc.).
5. The polarity of the measured value is displayed together with
the instantaneous measured value.
The direct "=" or alternating "~" voltage range has an input res-
istance of 10 m/Ω, in the alternating voltage range in parallel
with < 20 pF (AC coupled). If there is a "-" in front of the meas-
ured value during a direct-voltage measurement, the measured
voltage is negative (or the measuring leads are connected the
wrong way round).
Important!
Because the measurement input is extremely sensitive, random
measured values (spurious measured values) are sometimes
indicated even though the measuring leads are not connected to
a device under test. This "phenomenon" is normal and disap-
pears as soon as you make a measurement.
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