AEMC Megohmmeters 6522 User Manual page 23

2. Use the leads to connect the system to be tested to the instrument's
terminals. The system under test must be powered down and
discharged. When testing insulation, the typical connection is negative
(black) lead to conductor and positive (red) lead to ground or the outer
insulation of the device under test.
3. (Optional) Press the  button to display the current or the elapsed time.
(You can also do this during the measurement.)
4. Press the TEST button and hold it down until the displayed
measurement is stable. Note that if the instrument detects a voltage
greater than 25V in the system under test, pressing the TEST button
has no effect because the test will be prohibited. (An error screen will
appear.)
5. The resistance measurement is displayed on the LCD's main display
area and on the bar graph. The secondary display area indicates the test
voltage generated by the instrument.
Megohmmeter Model 6522/6524
V
Ω
Ω
k
MR
OFF
Ω
M
50V
100V
250V
500V
1000V
V
DC
19