Ac Voltage Measurement - Conrad Electronic VC630 Bedienungsanleitung

c) to the left of "ENTER"
- "Hz"; frequency measurements up to 4 MHz max. and "hfe"; tran-
sistor test
- "LOGIC"; logic level measurements (TTL, 3V, 5V) up to 5 V max. (VC
650 and VC 670)
- "SIG OUT"; TTL signal generator function up to 5 kHz max. (VC 650
and VC 670)
Attention!
Observe without fail the maximum permitted input levels! Take care
when handling voltages greater than 25 VAC rms / DC: touching electri-
cal circuits can endanger life due to electric shock.
Before changing to another measurement function, the test leads are to
be disconnected from the object being measured and removed from the
measuring instrument.
Use only the supplied test leads and the optional adapters for your mea-
surements. Before connecting, always check the condition of the
connecting plug and test probes and check the insulation for damage.
The test leads, but not the adapters, are approved for voltages up to
1000 V max. The VC 630, VC 650 and VC 670 measuring instruments are
designed for voltages up to 1000 VDC and 700 VAC rms max.

5.1 AC voltage measurement

For measurement of AC voltages up to 700 VAC rms max., proceed as fol-
lows:
a) Switch on the measuring instrument. The initial configuration is
always AC voltage measurement in "AUTO" (automatic range selec-
tion) mode.
b) Connect the black test lead to the "COM" measuring instrument
socket and the red test lead to the „V•Ohm•Hz•Logic•->I-" socket
c) The bar graph, a sort of analogue indicator with fast measurement
reaction time, is active beneath the measured value while measuring.
The bar graph performs the function of a trend indicator.
d) Connect the test leads to the object to be measured.
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Attention!
Should the range be exceeded (> 700 VAC rms) an acoustic warning sig-
nal (interrupted tone) sounds. Never exceed the maximum input level!
Note!
1. During AC voltage measurement in addition to the measured value
and the bar graph, in the right-hand lower sub-display ("small" dis-
play) the frequency of the AC voltage is also indicated. Note also the
following illustration.
AUTO
AC
0 +10
VOLT
(LCD)
2. The VC 670 measures the true rms of an AC input. This type of mea-
surement is always useful where non-sinusoidal, overloaded, mixed-
frequency or high frequency (switching power supply) signals are
concerned.
3. Selectable special functions
According to the model of measuring instrument, the following sub-
functions can be selected via the "ENTER MENU" button:
"Æ%" reference value measurement, "MIN/MAX" value capture,
"TIME", "REC" record measured value, "RCLL" recall measured value,
"LMT" comparison function (VC 670 only) and "PH" peak value hold
(VC 650 and VC 670 only). These sub-functions are described in detail
from section 5.12.
MAIN DISPLAY
V
BARGRAPH DISPLAY
SUB DISPLAY (S1)
Hz
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