Capacitance Measurement - Tenmars TM-87 User Manual

4.3.7. Capacitance measurement

Before taking capacitance measurements in circuit remove power from the
circuit being tested and discharge all capacitors. Use the short test lead pair
for measurement to reduce the stray capacitance. Before connecting the
test capacitor observe the display, which may have a reading other than
zero every time the range is changed. Subtract this offset reading from the
displayed reading of the test result of a capacitor to obtain the true value.
Connect the test capacitor to the inputs respecting the polarity connections
when required. Due to internal delay time, bargraph it's no operative in
capacitance measurement.
Fig. 8: Using the instrument for Capacitance measurement
1. Selecting the position
2. Insert the test leads into the jacks, the red plug into
into COM jack (see Fig. 8).
3. Connect the red and black test clamps to the capacitor terminals respecting if
necessary the proper polarities. The capacitance value is shown on display.
4. Pressing the R/SEL key to select the correct range or using the Autorange feature
(see paragraph 4.2.4). If the capacitance value under test is unknown, select the
highest range.
5. If the message "
6. For HOLD function, Minimum and Maximum value measurement and Relative
measure please refer to paragraph 4.2.
.
O.L
" is displayed the maximum readable value is reached.
CAUTION
HzVΩµA jack and black plug
15
TM-87/TM-88