Machine Inspection; Set-Up; Select A Frequency On The Transmitter; Check The Circuit And Adjust Power Level - RIDGID SeekTech ST-305 Operator's Manual

Machine Inspection

Before each use, inspect your ST-305 and correct any
problems to reduce the risk of serious injury from elec-
tric shock and other causes and prevent clamp damage.
1� Clean any oil, grease or dirt from all equipment handles
and controls� This helps prevent the machine or control
from slipping from your grip and aids inspection�
2� Inspect the ST-305 for any broken, worn, missing,
misaligned or binding parts or any other condition which
may prevent safe and normal operation� Make sure that
handles move smoothly between positions� If any prob-
lems are found, do not use ST-305 until repaired�
3� Inspect any other equipment being used per its instruc-
tions to make sure it is in good usable condition�

Set-Up

Always wear eye protection to protect your eyes against
dirt and other foreign objects.
Set up and operate the ST-305 and work area according
to these procedures to reduce the risk of injury from elec-
tric shock, and other causes, and prevent ST-305 damage.
1� Check work area for:
• Adequate lighting�
• Flammable liquids, vapors or dust that may ignite�
If present, do not work in area until sources have
been identified and corrected� The ST-305 is not
explosion proof and can cause sparks�
• Clear, level, stable dry place for equipment and
operator� Do not use the equipment while standing
in water�
2� Inspect the line to have a signal applied to it�
• The transmitter should only be used on insulted
conductors� When using the transmitter, the target
conductor should be grounded at each end� Other-
wise, the signal may not be strong enough to locate�
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SeekTech ST-305
• The transmitter is not designed to provide high volt-
age isolation and protection� Do not use where a
danger of high voltage contact is present�
3� Make sure equipment has been properly inspected�
4� Be sure the conductor to be traced is grounded at both
ends�

Select a Frequency on the Transmitter

The ST-305 line transmitter offers four choices of frequency�
Frequency is chosen by pressing on the Frequency Select
Key which will light the LEDs in sequence�
Available frequencies are:
• 1 kHz
• 8 kHz
• 33 kHz
• 262 kHz
• European version: 93 kHz (93,623 Hz�)
The selected frequency is shown by a lit LED� The 262 kHz
is shown by a rapid flashing of the 33 kHz LED (European
version: 93 kHz)�
To set the unit on 262 kHz, press the Frequency Key for
more than one second (long press)� The 33 kHz LED will
start flashing rapidly, indicating a 262 kHz frequency� For
the European version: a long press will select 93 kHz, caus-
ing the 33 kHz LED to flash rapidly)�
Check the Circuit and Adjust Power
Level
Confirm the circuit is grounded by checking the connec-
tion to the ground stake is secure and the stake is firmly
embedded in the ground� To adjust the power level, press
the power button briefly� The ST-305 will cycle through the
low, medium and high power levels�
NOTE: Higher power settings produce more current, which
gives a stronger signal� Less current prolongs battery life�
Signal strength measured by the receiver is directly propor-
tional to the amount of current on the line� More current will
produce a stronger signal received by the receiver�
Use only as much current as is needed to get a strong read-
ing on the receiver�
Generally the lower the resistance the more efficiently
current can be added� A lower resistance indicates an effi-
cient circuit and requires less voltage to charge the line�
Things that increase resistance include paint or dirt on the
connection points, very dry soil, poor ground connection,
poor insulation on a wire, or breaks in the conductor�
The transmitter's maximum current output depends on the
amount of resistance in the circuit�
CAUTION
If the transmitter is showing low or no current (low or no
beep rate), the signal may be too low to be detected by the
receiver locator and inadequate for tracing.
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