Voltage Measurement - Conrad M-4660A Bedienungsanleitung

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)
°C = Centigrade Degree
µF = Microfarad (exp.-6)
nF = Nanofarad (exp.-9)
pF = Pikofarad (exp.-12)
KΩ = Kiloohm (exp.3)
MΩ = Megaohm (exp.6)
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.
To measure DC or AC voltage proceed as follows:
1. Connect the red test-lead with the V/Ω socket (12) and the black test-
lead with the COM-socket (11).
2. Set the rotary function switch to the desired position (range). You
have 5 ranges for dc voltage ( DCV) or AC voltage (ACV) measurement
each. During AC voltage measurement the right sub-display will show
the dB-value of the AC voltage, the middle sub-display the frequency
and the main display the present measuring value.
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3. Connect the test-lead tips with the object to be measured (load, cir-
cuit etc).
4. The respective polarity of the value is displayed together with the cur-
rent measuring value in the main display.
Each of the five voltage ranges presents an input impedance of 10 mΩ
(in parellel with < 20 pF). AC-voltage input is AC-coupled.
As soon as " - " is set before the value during DC voltage measurement,
the voltage is negative (or the test leads are confused).
~
Hint
Due to the sensitive nature of the input terminal your meter might dis-
play any small values (not connected with the object). This residual
value will not affect the actual measurements. It will vanish as soon as
you start measurement. But Auto-Power-Off is not active when the
"phantom-measurements" are displayed.
During DC voltage measurement the three sub-displays below the main
display are active.
In the left sub-display the measuring value appears 1 second later, in the
middle sub-display the measuring value appears 2 seconds later and in
the right sub-display the measuring value appears 3 seconds later.
During AC voltage measurement the middle sub-display will show the
frequency of the AC voltage (in the range of 40 Hz - 400 Hz)
V
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