Measuring Resistance - Wetekom 81 52 69 Bedienungsanleitung

3. Connect the black test lead to the COM jack (8). If the current to be
measured is less than 400 mA, connect the red test lead to the mA°C jack
(7). If the current is between 400 mA and 10 A, connect the red test lead to
the 10 A jack (6) instead.
4. Turn off the power to the circuit. Discharge all high-voltage capacitors.
5. Break the current path to be tested. Connect the red test lead to the more
positive side of the break and the black test lead to the more negative side
of the break (in series with the circuit).
6. Turn on power to the circuit and read the display. For DC current
measurements the polarity will be indicated as well.
Notes:
When the rotary function / range switch is in the 10 A range position, you
have to use the 10 A jack.
When you use the 10 A jack, the rotary function / range switch has to be in
the 10 A range position.

7. Measuring Resistance

Before starting to measure resistance observe the following basic rules:
Never connect the measuring probes of the meter to a power source if you
have selected the Ω measuring range. This will damage the meter.
To avoid damages to the meter or to the devices under test and to avoid
false readings, disconnect circuit power and discharge all high-voltage
capacitors before measuring resistance.
1. Set the rotary function / range switch (5) to the Ω range.
2. Connect the black test lead to the COM jack (8) and the red test lead to the
V/Ω/Hz/ /
3. Connect the test leads across the load to be measured and read the
reading on the display.
Notes:
For resistance above 1 MΩ, the meter may take a few seconds to stabilize
readings. This is normal for high resistance measuring.
To obtain precision readings in Iow-resistance, that is the range of 200 Ω,
short-circuit the input terminals before hand and record the reading ob-
tained (called this reading as X). (X) is the additional resistance from the
test lead. Then use the equation:
measured resistance value (Y) - (X) = precision readings of resistance.
jack (9).
Using
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