6
E
WARNING:
Always turn off AC power when working near wiring.
WARNING:
Shielded wires or wires in metal conduits, casings,
metalized walls, or thick, dense walls may not be
detected.
CAUTION:
Use personal protective equipment. Always wear
eye protection. Depending on the work conditions,
wearing protective equipment such as a dust
mask, non-skid safety shoes, hard hat, and hearing
protection will reduce the risk of personal injury.
IMPORTANT SAFETY NOTICE
Ensure proper detection of live wires. Always hold the Stud
Sensor STHT77587/STHT77588 in the handle area only. Grasp
between fingers and thumb while making contact with your palm
(Figure
C
).
NOTE: Static electrical charges that can develop on drywall
and other surfaces will spread the voltage detection area many
inches on each side of the actual electrical wire. To aid in
locating the wire position, scan holding the unit ½” (13mm) away
from the wall surface or place your other hand on the surface
approximately 12” (305mm) from the sensor.
Battery Safety
WARNING:
Batteries can explode, or leak, and can cause
injury or fire. To reduce this risk:
• Carefully follow all instructions and warnings on the battery
label and package.
• Always insert batteries correctly with regard to polarity
(+ and –), as marked on the battery and the equipment.
• Do not short battery terminals.
• Do not charge disposable batteries.
• Do not mix old and new batteries. Replace all batteries at the
same time with new batteries of the same brand and type.
• Remove dead batteries immediately and dispose of per
local codes.
• Do not dispose of batteries in fire.
• Keep batteries out of reach of children.
Installing AAA Batteries
Load two new AAA batteries in the STHT77577 or STHT77588
stud sensor.
1.
On the bottom of the stud sensor, lift up the latch (Figure
B
1
) to unlock the battery compartment cover.
2.
Move the cover upward (Figure
B
2
) and remove it
once it separates from the stud sensor.
3.
Insert two new, high-quality AAA batteries, making sure to
position the - and + ends of each battery as noted inside
the battery compartment (Figure
B
3
).
4.
Place the cover back on the stud sensor.
• Insert the two pins at the top of the cover into the holes
in the stud sensor (Figure
B
4
).
• Slowly lower the cover and press down until the latch
locks securely on the stud sensor (Figure
B
5
).
5.
Press to test the stud sensor.
• All the LEDs except the green Power LED should
illuminate for a second and then turn off.
• Whenever you press , the green Power LED
should illuminate to indicate that the batteries are good.
If this LED blinks or does not illuminate, change the
batteries.
Using the Stud Sensor
The stud sensor will help you find wood or metal studs, and AC
voltage behind drywall.
• STHT77587 will work on up to 3/4” (19mm) thick drywall.
• STHT77588 will work on up to 1.5” (38mm) thick drywall.
• STHT77587 and STHT77588 will detect AC voltage through
up to 2” (50.8mm) thick drywall.
• When AC voltage is found, the stud sensor will sound a few
short (alternating) beeps and light the AC LED
(Figure
A
3
).
• When the center of a stud is found, the stud sensor will
sound one longer (constant) beep and light the center LED
(Figure
A
5
).
• When live AC and the center of a stud are both found, the
stud sensor will sound both the long beep and the short
beeps, and light the center and AC LEDs.
