Operation Overview
WARNING
Wear eye protection when appropriate
to protect your eyes against dirt and
other foreign objects. Follow operating
instructions to reduce the risk of injury
from electrical shock and other causes.
The default frequencies that come with the
ST-305/R are:
• 1 kHz [1,024 Hz]
• 8 kHz [8,192 Hz]
• 33 kHz [32,768 Hz]
• 93 kHz [93,623 Hz] or 262 kHz
[262,144 Hz]
Note: High frequency is 93 kHz or 262 kHz
depending on your region.
The ST-305/R has three operating modes
that can be used during a locate. Which
mode you use depends on the circumstanc-
es of the locate.
Direct Connect — The leads con-
nect directly to the target conductor
and a suitable ground.
Inductive Clamp — The optional in-
ductive clamp encircles the target
conductor when metal-to-metal con-
tact is not possible or unable to pro-
duce the desired result.
Inductive — The ST-305/R is placed
over a conductor. The internal anten-
na induces a signal on to the target
conductor.
10 – English – ST-305/R
Powering the ST-305/R
WARNING
Disconnect external leads from any en-
ergized utility before opening the bat-
tery compartment. To prevent overheat-
ing and leakage, do not mix battery types
or brands and do not combine new and
used batteries. Always remove the bat-
teries before shipping or storing the ST-
305/R.
Li-Ion 18 V Battery
A Li-Ion 18 V rechargeable battery can be
used simultaneously with the internal C-cell
batteries. If the voltage falls below 15.4 V or
if the battery dies, the ST-305R switches to
internal batteries.
C-Cell Batteries
To install C-cell batteries, rotate the knob
on the battery holder counter-clockwise
until the battery compartment releases. Pull
straight back on the knob to remove the
cover. Insert the 6 batteries as shown on the
inside decals.
Note: Rechargeable C-cell batteries do not
recharge in the ST-305/R.
AC Adapter
For indoor use only, the ST-305R can also
be powered by an external AC adapter no
less than 35 W. Read and follow the instruc-
tions as specified by the manufacturer of the
AC adapter before using it with the ST-305R.
Note: The AC adapter does not recharge the
18 V battery.