12
mV press the key again. For inputs less than
10mV frequency is not displayed.
Capacitance Tests (uF)
(BMM2580 only)
The measured capacitance is indicated on the display.
1. Set the selector switch to uF.
2. Connect the test leads to the circuit under test.
3. After a short settling time, the reading will be
displayed automatically.
Zeroing of uF
To zero the uF range, disconnect the leads, wait for
the reading to settle and then press the TEST
button. Up to 10,0nF can be zeroed on the uF
range. The symbol will appear to indicate the
zero has been adjusted.
1. Select the uF range.
2. Disconnect the test leads from the circuit
under test.
3. When the reading has stabilised, press the
TEST button. The zero offset symbol will appear.
4. To release the zero offset press the test button
again.
The range is suitable for the testing of discrete
components and short low interference level signal
lines. If electrolytic capacitors are being tested
then the red lead should be connected to +ve of
the capacitor. This range is not suitable for
checking capacitance of signal lines which are
subject to high levels of a.c. interference.
When the test is started – – – will show on the
display, if there is excessive noise this symbol will
remain or flash indicating that there is too much
noise for a result to be reached.
Milliamps Tests (mA)
Because of the low source impedance associated
with current measuring this test has an added
feature ensuring that when the range is first
entered the default voltmeter is visible. Testing will
be inhibited if more than 25V is present at the
terminals. To start testing the
TEST button should
be pressed and held down for approx. 2 seconds
to activate the
mA range. Once activated, the
TEST button no longer needs to be used and the
measured value will be displayed automatically. To
switch the display between a.c. and d.c. press the
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