Capacitance Measurement; Frequency Measurement; Temperature Measurement - Forch F73 Bedienungsanleitung

3.2.5 Capacitance measurement

To avoid electrical shock and/or damage to the instrument, disconnect circuit power
and discharge all high-voltage capacitors before measuring capacitance. Use the dc
voltage function to confirm that the capacitor is discharged.
Capacitance is the ability of a component to store an electrical charge.
The unit of capacitance is the farad (F). Most capacitors are in the nanofarad to microfarad
range. The Meter's capacitance ranges are 40.00 nF, 400.0 nF, 4.000 μF, 40.00 μF ,400.0 μF
and 4000 μF.
To measure capacitance:
1. Set the rotary switch to
Capacitance Test.
2. Connect the black and red test leads to the COM and
(or you can measure the capacitance by using the special Multi-Function Socket).
3. Connect the test leads to the capacitor being measured and read the displayed value.
Some tips for measuring capacitance:
The meter may take a few seconds to stabilize reading. This is normal for high
capacitance measuring.
To improve the accuracy of measurements less than 40nF, subtract the residual
capacitance of the Meter and leads.
3.2.6 Transistor measurement
To avoid electrical shock and/or damage to the instrument, do not apply more than
250Vdc or 250Vac rms between the hFE terminal and the COM terminal.
1. Set the rotary switch to hFE position.
2. Connect the "com" plug and "+" plug of the special multi-function socket to the COM
and hFE terminals.
3. Determine whether the transistor to be tested is NPN or PNP type and locate the Emitter,
Base and Collector leads.
4. Insert leads of the transistor into proper holes of the special multi-function socket.
5. The meter will show the approx. hFE value at test condition of base current 10μA and
Vce 2.8V.

3.2.7 Frequency measurement

Do not measure Frequency on high voltage (>250V) to avoid electrical shock hazard
and/or damage to the instrument.
Frequency is the number of cycles a voltage or current signal completes each second.
To measure frequency:
1. Set the rotary switch to Hz % position.
2. Connect the black and red test leads to the COM and Hz terminals respectively.
3. Connect the test leads to the circuit being measured
4. Read the displayed value.

3.2.8 Temperature measurement

To avoid electrical shock and/or damage to the instrument, do not apply more than
250Vdc or 250Vac rms between the terminal and the COM terminal.
To avoid electrical shock, do not use this instrument when voltages at the measure-
ment surface exceed 60v dc or 24v rms. Ac.
To avoid damage or burns. Do not make temperature measurements in microwave
ovens.
position. Press the FUNC key three times to ativate
terminals respectively