Voltage Measurement - Conrad M-4660M Bedienungsanleitung

to the next digit. As soon as the minimum reference (MIN) value has
been fixed, "HIGH" flashes over the right sub-display. Set this high
reference value respectively (with polarity and four digit value). After
the reference values have been defined press SET/R key again. Now
"R-H" for Range Hold flashes in the top line of the display. Set with
the UP and DOWN buttons the measuring range (e.g. voltage control
in a circuit under worst-case conditions). After the measuring range
has been entered (as far as a manual selection is possible) Comparison
= CMP is activated.
To exit CMP mode turn the rotary function switch (observe the safety
rules!) to an adjacent range or press "FUNC". Reset with the SET/R
button is also possible, even during measurement.
4.3.5 Display Annunciators and Symbols for the Modes
a) Diode Test and Continuity Check
The value displayed is the forward voltage at approx. 1 mA test current.
Range of 0 - 2.0 V.
The contnuity test enables you to check continuity of wiring, connec-
tions or fuses. Either acoustic or visual test (display of measurement)
is possible. An acoustic signal is emitted at resistors below 30 Ω.
b) Negative Polarity
Shows if test-leads are confused or indicates (with a " − ") negative
input before the measurement.
c) FREQ Frequency Measurement
You can measure frequency up to 20 MHz.
d) CAP Capacitance Measurement
The capacitance ranges lets you measure discharged capacitors of 10 nF
to 200 µF.
e) mH inductance measurement
The inductance measuring range permits measurement of dead coils
(windings, filter coils, etc.) of approx. 0.05 to 200 mH
f) hFE Transistor Test
Enables you to measure the hFE value.
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g) rDY = ready = Logictest
This function enables you to check and to display all usual logic levels.
h) Low Battery
A 9-Volt alkaline battery in this meter has an avery life of approx. 100
to 150 hours. Low battery indication approx. 8 hours before battery is
"dead". Battery check between the measurements.
i) The following symbols indicate the unit of the value displays:
AC = AC current or voltage
DC = DC current or voltage
mV = Millivolt (exp.-3)
V = Volts
mA = Milliampere (exp.-3)
A = Ampere
Hz = Hertz
kHz = kilohertz (exp.3)
MHz = Megahertz (exp.6)
µF = Microfarad (exp.-6)
nF = Nanofarad (exp.-9)
pF = Pikofarad (exp.-12)
KΩ = Kiloohm (exp.3)
MΩ = Megaohm (exp.6)
mH = milli-Henry (exp. -3)
dB = Decibels
5. Measurement

5.1 Voltage Measurement

Attention!
Never exceed the maximum input limits. of max. 1000 VDC or 750 VACrms.
Do not touch circuits or parts of circuits, if you measure voltage more
than 25 VACrms or 35 VDC.
If you measure voltage the aperage terminals must not be connected.
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