Capacitance Measurement - Conrad Me-32 Bedienungsanleitung

+
Cathode mark
Forward direction

6.6 Capacitance measurement

To test bipolar capacitors (not electrolytic capacitors), proceed as
follows:
1. Discharge each capacitor before connecting it to the meas-
uring appliance.
Warning!
High-energy discharges can take place when capacitors are
short-circuited - Danger - Risk of fatal injury. Do not touch leads
of capacitors having voltages in excess of 35 V DC or 25 V AC.
Caution is required in rooms where dust, flammable gases,
vapours or liquids are present or could be present ==> explosi-
on hazard! Do not perform measurements on capacitors that are
fitted in circuits/parts of circuits.
2. Set the rotary switch to the desired measuring range, either
4 nF or 400 nF.
3. Connect the capacitor under test to the outer slit contacts of
the test receptacle.
24
+
Reverse direction
4. Read off the measured value.
Important!
a) In the case of unmarked capacitors or those with insufficiently
legible markings, start by performing a measurement in the
smallest possible measuring range.
b) In the case of a capacitor with a short-circuit, "OL" for over-
range is displayed instead of a measured value. There is also an
audible warning tone. In the case of a capacitor with a high
leakage current, either "OL" for overload or a much higher
value than the marked value is displayed. In the case of a capa-
citor with an open-circuit, "0" or a few pF is/are displayed in
every range.
6.7 Transistor test
Warning!
The transistor receptacle is not protected against overloads.
To measure the parameter hFE (gain) of a transistor, proceed as
follows:
1. Set the rotary switch to hFE.
Plug the transistor under test into the test receptacle.
When doing so, note the following points:
Important!
- Note the pin sequence (e.g. C-B-E) of the device under test
(consult transistor Data Book).
- Some types of transistors have base-emitter resistances which
can falsify the measurement.
25