Chauvin Arnoux AEMC Instruments OX5042 User manual

AEMC® Instruments •[phone] •www.aemc.com 99-MAN 100453v4 1
Model OX5042 Handscope
Instructions for General
Electrical Measurements
First-Time Setup
1. Turn the instrument ON.
2. Press Scope Mode .
3. Press Channel A . The main menu appears as follows at the bottom of the
screen (default settings):
4. Press Channel B .
5. Press the right navigation key until the Multiplier field is highlighted. By
default this is set to x1.
until the x1000 setting is highlighted.6. Press the down navigation key
7. Press Enter to save the setting.
8. Press to highlight the Units field.
to highlight the Asetting.
9. Press
10. Press to save the setting. The main menu now appears as follows:
NOTE: These settings will remain in effect (even if the instrument batteries are drained or
removed) until changed by the user.
11. Apply the voltage to be measured to Channel A and current to Channel B.
12. Press the Auto Set button to properly scale the measurements.

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AC Voltage Measurement
1. Attach the BNC adapter (shown on right) to the Channel A input.
2. Attach the 10’ black and red leads to the adapter.
3. Select the alligator or pencil tip probes and attach them to the
leads as needed.
4. Attach the test leads to the measurement point.
5. Turn the instrument ON.
6. Press Scope Mode .
7. Press Channel A . Verify that the main menu appears as follows:
8. Press Meter Mode . The voltage measurement appears on the screen
(see the example below):
9. Press A and verify that Auto is ON in the menu at the bottom of the
display. If it isn’t, use the right navigation key to highlight Auto then the up or
down navigation key to select ON.
10. The bottom display should look like this:
NOTE: If this menu screen is not displayed, press the Meas key. Then, press the A channel
key to show the menu.
11. Read the voltage and record it: ___________________________

AEMC® Instruments •[phone] •www.aemc.com 99-MAN 100453v4 3
AC Current Measurement
1. Select the current probe based on the current to be measured:
•MN251T for measuring from 1 – 200A
•MiniFlex sensor for measuring 10 – 3000A.
2. Attach the current probe to the Channel B input.
3. Clip the current probe around the conductor to be measured.
4. Turn the instrument ON.
5. Press Scope Mode .
6. Press Channel B . Verify the main menu appears as follows:
7. Press Meter Mode . The current measurement appears on the Channel B
display (see the example below):
8. Read the current and record it: ___________________________
NOTE: You may need to use the Range keys to make the measurement readable.

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AC Current Harmonics
1. Set up the instrument for current measurement, as instructed by steps 1
through 6 of the “AC Current Measurement” section above.
2. Press Harmonics Mode . The THD (Total Harmonics Distortion) percentage
appears in the upper right corner on the Channel B display
(see the example below):
3. Record the THD percentage: ________________ %

AEMC® Instruments •[phone] •www.aemc.com 99-MAN 100453v4 5
Millivolt Drop
1. Set up the instrument for voltage measurement, as instructed by steps 1
through 6 of the “AC Voltage Measurement” section above.
2. Press Channel A .
3. Use the Attenuate Range key to set units in the mV range. The millivolt
drop for the test point appears on the Channel A display (see the example below):
4. Move the test leads to each measurement point, and record each millivolt drop:
___________ ___________ ___________
___________ ___________ ___________
___________ ___________ ___________
If applicable, record the completed measurements in your report software.

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