VOLTCRAFT VC 820-1 Notice D'emploi page 25

V = volt (unit of electric potential)
A = ampere (unit of electric current)
mA = milliampere (exp.-3)
µA = microampere (exp.-6)
Hz = Hertz
kHz = kilohertz (exp.3)
MHz = megahertz (exp.6)
kΩ = kiloohm (exp.3)
MΩ = megaohm (exp.6)
nF = nanofarad (nano = exp.-9)
µF = microfarad (micro = exp.-6)
B Button layout and functional description with key input
B 1 RANGE
RANGE bedeutet, wörtlich übersetzt, Bereich. It refers to the measuring range. As
soon as the „AUTO" symbol (black background) becomes visible in the display, you
do not need to select the correct, adjusted measuring range. The intelligence of the
measuring instrument switches for you. But the measuring range can also be
changed manually. To do this, proceed as follows:
- Press the „RANGE" button; the „AUTO" symbol will disappear.
- Now, each further activation of the „RANGE" button changes the measuring
range. This change is indicated by the movement of the decimal point and pos-
sibly by the change of the measuring unit.
If you want to leave the manual setting, press the „RANGE" button and hold it for
longer than 1s (keep it pressed).
B 2 „Hz %"
If the rotary switch is set to „Hz", this button will be relevant. You do not need this
button for the real measurement of frequency. If you like to indicate the pulse-pause
ratio instead of the normal frequency measurement (for TTL levels), you have to
press this button once.
Instead of the frequency indication in HZ, kHz or MHz, the pulse-pause ratio, also
called DUTY CYCLE, is indicated in % now. By pressing the button anew, you return
to the normal frequency measurement.
B 3 REL
The reference value measurement indicated by the triangle symbol allows measure-
ments which refer to a previously indicated / measured value. Now, the difference
value is indicated (current measuring value minus reference value).
This function is particularly useful for measuring resistance values. The main indica-
tion can be set to „0000". Thus, you can measure values in the low-resistance range
without being forced to always reduce the line resistance of the instrument leads
from the value measured.
25