Fluke C9970 User Manual page 13

5. Hold the probe tip against the object. If needed, turn the Product from side to
side to make a reliable contact. Paint, other surface finishes, or corrosion
may interfere with the connection.
6. To avoid false indications due to static electrical discharge, maintain contact
with the Product and the object as you release the trigger and push and hold
the trigger again.
7. Continue to hold down the trigger as you remove the Product from the
object, and observe the LEDs:
The green LED emits light to indicate a safe condition.

The red LED flashes to indicate the presence of dangerous voltages.

Move away from the object and refer to the safety procedures of your
company.
Aerial Tests
When you work aloft in an insulated bucket or on a ladder where you are near
power transmission lines and isolated from ground, to prevent false indications
due to the voltage induced on you:
1. Put on company-required protective equipment, such as a hard hat, eye
protection, etc.
2. Put the conductive end cap on the belt-clip end of the handle. Push until the
end cap is firmly in place.
3. Do a self check test. See Self Check Test.
4. Connect one end of the ground cord to a known earth ground. Connect the
other end of the ground cord to the contact knob on the end cap.
5. Ascend to a height to do a voltage test, but do not touch an object such as
hardware, light fixture, or wiring that you suspect may contain a hazardous
voltage.
6. Test the suspect object for hazardous voltage as described earlier and
observe the LEDs:
If after you press the trigger and touch the probe tip to the object, the

green LED remains illuminated and the red LED remains off, place a
temporary bond and proceed with your work. See Temporary Bond.
If the red LED flashes, a hazardous condition exists. Descend

immediately and refer to the safety procedures of your company.
Applications
This section describes additional instructions and safeguards for more specific
applications. These instructions expand the previous instructions, but they do not
replace them.
Voltage Detector
Applications
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