Performing Measurements - VOLTCRAFT VC-160 Bedienungsanleitung

- Negative polarity
When the test leads are reversed or with negative polarity, a "-"
sign appears in front of the measured value.
- Transistor test
During transistor test, the hFE parameter is measured "ß"
- All remaining symbols indicate the various units of measure-
ment:
AC = AC value
mV = millivolt (exp.-3)
V = Volt
µA = microampere (exp.-6)
mA = milliampere (exp.-3)
A = ampere
ß = hFE value when measuring transistors
kΩ = kiloohm (exp.3)
MΩ = megohm (exp.6)

Performing measurements

A Direct voltage measurement
The maximum permitted input value, 600 V DC or
V AC rms max., must not be exceeded under any
circumstances.
Do not touch any circuits or circuitry components
when measuring voltages higher than 25 V AC rms
or 35 V DC.
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If "O.L" for overload is displayed, then the diode is in good conditi-
on. If on the contrary a "voltage value" is displayed, then either the
path being measured is incorrectly connected or is defective.
During diode testing, make sure that the diode and
any circuit into which it may possibly be built, is ab-
solutely voltage-free. All capacitors present must be
discharged.
F Acoustic continuity testing
With this function, voltage-free wiring, fuses, circuits, etc. can be
acoustically tested for continuity. For this measurement, proceed
as follows:
1. Connect the black test lead to the COM socket and the red test
lead to the V/Ohm socket.
2. Set the rotary switch to "
ect". Now connect the test probes to the absolutely idle measu-
ring object.
3. If the continuity resistance is less than 30 Ohm, then an acoustic
signal sounds.
Do not measure charged capacitors because a
possible discharge may damage the measuring
instrument.
G Transistor test
The transistor connector is not protected against
overload.
To measure the amplification of a transistor, proceed as follows:
1. Position the rotary switch to "hFE".
" and actuate the button "Sel-
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