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In the mode “LOGIC“ it is not possible to select function modes
with “FUNC“ button!
Attention!
The voltage input of logic test is limited to max. 39.99 V. Never exceed
the maximum input limits.
Hint!
During logic-level measurement, the right sub-display will show the pre-
sent DC voltage value and the middle sub-display displays the frequency.
5.12 Power Measurement
To check the power input of a consumer e.g. TV-set, stereo-set in stand-
by mode or iron or bulb etc. a power meter adapter is needed. Is consists
of a plug/socket on one side and the multi-plug for the meter connection
on the other end.
First connect the multi-plug with the multimeter.
Afterwards connect the load/consumer which has been switched off with
the earthing-contact socket of the adapter and finally connect the
earthing-contact plug of the adapter with an earthing-contact wall
socket. Always control the correct contact of all plug connections and
the correct polarity of the multi-plug at the multimeter. The multi-plug
is lettered with the current path “20 A“ on the left, in the middle with
the gounding “COM“ and on the right with the voltage path “V/Ohm“.
Connect the multi-plug according to its lettering with the multimeter.
“20 A“ with the 20 A-socket, “COM“ with the COM-socket and “V/Ohm“
with the V/Ohm socket.
Attention!
If the connection with the multimeter is wrong or faulty, the meter, the
adapter or the consumer could be destroyed. Attention! Life Danger!
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5.10 Usage of the Analogous Bargraph
The bargraph is easy to use and to understand. Is is comparable with the
needle of an analogous measuring instrument, but without its mechani-
cal disadvantages. Is is especially for quick changing measuring signals,
for which the digital display is too “slow“. So you can quickly recognize
see tendencies in the measuring values. If the range is exceeded the com-
plete bargraph scale with an arrow on the right flashes in the display.
Some functions are accompanied by an acoustic signal (mV-measure-
ment).
5.11 Logic Test
This measuring function lets you easily check logic levels in digital cir-
cuits.
1. Switch on your measuring unit.
2. Set the rotary switch (10) to “LOGIC“. This function displays “rdy“
(=ready).
3. Connect the test-leads with the COM-input socket (black lead) and
the V-Ohm socket (red lead).
4. Now connect the other end of the black test-lead to the “ground“
point of the digital circuit = “-“ (normally) and the red test-probe to
the supplying voltage point (V+ or Vcc).
5. If all leads are connected, press once Set/Reset-button to save the
“High“-Level.
6. While keeping the black test-lead connected to the gound, “separa-
te“ the red test-probe from the supplying voltage point (V+). Now
move the red test-pobes to the points in question. The multimeter
will immediately display one of the three modes
• if the level exceeds 70 % of the stored supply voltage “Hi“ is dis-
played.
• if the level falls below 30 % of the stored supply voltage, “Lo“ is
displayed.
• if the level is between stored reference value = 31 % and 69 % of
the stored supply voltage (e.g. 5 V), “——“ is displayed.
