9
Section 4
Description and Operation
of the
Detex
®
Voltage Detectors
PRECAUTION
Be sure to read and understand Section 2, Safety, of this manual before
operating the voltage detector. Even after determining that a circuit is
de-energized by use of the detector, it may still carry an induced voltage, a
capacitively coupled voltage, or an applied voltage lower than the operating
range of the detector. The circuit under test must be grounded before being
touched.
ELECTRONIC VOLTAGE DETECTORS
These single-pole voltage detectors are used to verify the absence of voltage
in the detector's range on a line or terminal of any grounded ac electrical
system. The presence of ac voltage is detected with respect to ground by
making contact between the detector and the live equipment. The
three-step procedure of testing the detector, testing for absence of high
voltage, and testing the detector again should be strictly observed.
Cat. No. 514360 and 514242 series detectors, see Figure 1, use an electronic
detection circuit powered by batteries enclosed in the assembly. The
presence of voltage is indicated by an audible signal sounding and by a red
light-emitting diode (LED) flashing. Absence of these signals indicates that
the conductor or termination under test is free of voltage above the low
voltage limit of the detector.
To activate the detector test system, briefly press the red TEST button. The
audible signal sounds and the red LED flashes for a short time. The green
LED lights for approximately two minutes indicating that the detector is
operational and ready for use. The green LED extinguishes when the
presence of voltage is detected as indicated by the audible signal sounding
and by the red LED flashing. Note that the Cat. No. 514242 series
detectors have four red LED's for ease of visibility.
Except for the Cat. No. 514360-1 detector, which is equipped with a
telescopic pole, detectors with spline fittings must be attached to a universal