General Note - Conrad VC630 Notice D'emploi

tion) mode. Now press the „V•-I(-•½•->I-" button twice. The measu-
ring instrument switches to capacity measurement, recognisable
through the capacitor symbol at the bottom edge of the screen..
When the „V•-I(-•½•->I-" button is pressed once again (ie. from the
base configuration, three times), diode test is reached, recognisable
through the diode symbol at the bottom edge of the screen.
b) For diode test, connect the black test lead to the "COM" socket of the
measuring instrument and the red test lead to the „V•½•Hz•Logic•-
>I-" socket. When measuring capacity, only the measurement socket
adjacent to the "mAoTEMPoA" button on its right is to be used
("TEMP" present only on VC 650 and VC 670).
c) The bar graph beneath the measured value is active during measure-
ment, being similar to an analogue indicator with a faster reaction
time. The bar graph operates as a trend indicator.
d) Connect the test probes to the object to be measured, a diode, taking
care that it is voltage-free.
Note when measuring diodes!
Connect the test probes to the voltage-free semi-conductor component,
a diode or transistor. In this process, note that the red test lead must be
connected to the anode and the black test lead to the cathode. The for-
ward conducting direction will now be measured. For an intact PN-junc-
tion in a silicon diode path, a value between 0.45 and 0.75 VDC appears,
while in a germanium diode path a value between 0.2 and 0.4 VDC
appears. If, however, instead of a voltage "O.L" (for overload) appears,
the diode path is open-circuit or the test leads reversed. If for transistors
a voltage of more than 1 V is measured, it can be that the transistor
incorporates resistors.
For light-emitting diodes, a forward voltage of approx. 1.4 up to 2.2
VDC will be measured. Where low current LEDs are concerned, the mea-
surement current is sufficient to cause these to light.
The reverse direction of a diode path is measured with the red test lead
connected to the cathode and the black test lead to the anode. If as a
result of this a voltage value is indicated, the diode is faulty. If on the
contrary "O.L" is indicated, the diode path is high-impedance (O.K).
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General note!

1. During capacity measurement and diode test, other than the mea-
sured value only the bar graph is also present. Note the following
illustration.
2. Selectable special functions
The following sub-functions, according to the multimeter model, are
selectable using the "ENTER MENU" button:
"Æ%" reference value measurements, "MIN/MAX" value capture,
"TIME", "REC" record measured value, "RCLL" measured value recall,
"LMT" comparison function (VC 670 only) and "PH" peak value measure-
ment (VC 650 and VC 670 only). These sub-functions are described in
more detail in section 5.12.
AUTO
µF
0 +10 +20
AUTO
mV
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