Amprobe TIC-300-PRO Non-Contact-Voltage-Detector - Manual (Page 13)

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2. Push the LOW range push button
3. Make sure the wire or the heating element is
energized
4. Place the tip of the probe near the wire and start
tracing along it. When the fast or continuous
beep stops, this indicates the point of the break or
“open”
Check Outlets and Switches. (See Figs 3 & 4)
1. Push the ON/OFF push button to turn the unit on
2. Push the LOW range push button
3. Place the probe tip of the TIC 300 PRO against the
outlet or switch contact.
4. Increase beeping indicates voltage presence