ennoLogic eM870M Insulation Multimeter
Function Descriptions
26
3.2.6 Resistance Measurement
To measure resistance, set up the meter as shown in Figure 3-6:
1.
Turn on the power switch and set the rotary switch to position .
2.
Connect the red and black test leads to the
V
and
COM
terminals respectively.
3.
Connect the test leads/probes to the two ends of a resistor and read the displayed resistance value. If the display shows OL,
it indicates that the resistor is larger than 50MΩ (resistance measurement range is 0.1Ω ~ 50MΩ).
4.
By pressing the
RANGE
key, it is possible to select a desired range manually. The display will show what range is
currently active, keep pressing the RANGE key to cycle through the available ranges. If the meter displays OL while in
manual range mode, it is necessary to select a larger range.
Note: If you are performing resistance measurements on a circuit board, it is necessary to turn off the power to the circuit
board before measuring. A resistor tested in-circuit may have other components connected to it in parallel, resulting in
different values than if tested outside the circuit or having at least one of its probed leads isolated. Disconnecting power
will also prevent damage to the meter, or false readings that will occur if the resistor is carrying a current induced by a
source other than the meter itself.
Summary of Contents for eM870M
Page 1: ...eM870M Insulation Multimeter User Manual...
Page 51: ......