Measuring Resistance - Wetekom 37 99 74 Bedienungsanleitung

7. Measuring Resistance

Warning
To avoid damages to the meter or to the devices under test, disconnect
circuit power and discharge all high-voltage capacitors before measuring
resistance.
The resistance ranges are: 200 Ω, 2 kΩ, 20 kΩ, 200 kΩ, 2 MΩ and 200 MΩ.
To measure resistance, connect the
meter as follows:
1. Insert the red test lead into the
V/Ω/ /ºC/ºF input (21) and the
black test lead into the COM input
(22).
2. Set the rotary switch (20) to an
appropriate measurement position
in Ω range.
3. Connect the test leads across
with the object being measured.
The measured value shows on
the display.
Notes
The test leads can add 0.1 Ω to 0.3 Ω of error to the resistance measurement.
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 obtained
(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.
For high resistance (>1 MΩ), it is normal taking several seconds to obtain a
stable reading.
When there is no input, for example in open circuit condition, the meter
displays "1".
When resistance measurement has been completed, disconnect the
connection between the testing leads and the circuit under test.
Using
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