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© Copyright Siborg Systems Inc.
the test signal can be selected a range of fixed values from 100
Hz to 100 kHz. Test voltage can be set to 1.0, 0.5 and 0.1 Vrms.
By passing direct current through the measured component, the
voltage and current can be measured. Using
Ω’s law, the DC
current Resistance (RDC) is calculated.
By applying the DC voltage in forward and reverse direction, the
diodes are detected, and the polarity of p-n junction is
determined.
For capacitors larger than 40 mF the capacitance is calculated
using the voltage variation on the measured capacitor when it is
charging for a certain time interval and applied current.
The principle of the frequency meter is based on the counting of
pulses of the reference generator between the two ramps of the
input signal for a certain period of time (by default about 1
second). At the same time, the quantity of periods of the input
signal is counted too. Then the frequency
f
is calculated by the
formula
f
= M/N*
f
r
where M is the number of periods of the
input signal, N is the number of pulses from the reference
generator and
f
r
is the frequency of the reference generator.
The principle of measuring the voltage is based on comparing the
input signal with the reference voltage.
5 Safety Measures and General Instructions
For safe and reliable operation of the device, follow these rules:
1.
Exercise additional caution when measure the capacitance,
inductance, resistance and diodes in a live circuit
2.
Never apply voltage to the probes when the device is in the
R-L-C-D, RDC+LED or Generator mode.
3.
Never apply more than 20 V DC or 14 Vrms to the probes
when the device is in Voltage, Frequency or Oscilloscope
mode.
4.
Never measure Charged Capacitors
5.
Do not make measurements while the device is charging
6.
Charge the battery using a USB port of a computer or a DC
charger 5 V +/- 5%. Do not use damaged cables or chargers.
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