Testboy TB 313, Operating Instructions Manual

Page: 38 / 144

Operation
38 Testboy
®
TB 313
Diode test
With the selector switch set to " / ◦ ))". Insert the black test lead into the
‘COM’ socket and the red test lead into the V/ Ω /TEMP/CAP socket. Using
the test probes, touch the test points of the test object. Red test lead = an-
ode, black test lead = cathode. The forward voltage drop is displayed.
Measurement range Resolution Display
1 mV Forward voltage
-Forward current: approx. 25 µA, reverse voltage: approx. 2.8 V.
Continuity testing
With the selector switch set to " / ◦ ))". Insert the black test lead into the
‘COM’ socket and the red test lead into the V/ Ω /TEMP/CAP socket. Using
the test probes, touch the test points of the test circuit. An acoustic signal is
emitted if a resistance under 70
Ω is measured.
Important: Isolate from the power supply and discharge capacitors
in the circuit to be measured.
Measurement range Function
◦ )) The integrated buzzer signals up to a resis-
tance of 70
Ω
-Measuring voltage: approx. 2.8 V.