Schonstedt Loki series Manuel utilisateur
Loki Pipe & Cable Locators
User guide
90/UG114INT
CONTRACTOR
MODEL
UTILITIES
MODEL
1
IMPORTANT SAFETY NOTICE
Risk of property damage, death, or serious injury may result if
buried pipes and cables are not properly located before digging.
Read and follow all instructions and warnings in this user guide
before using the Loki receiver and transmitter.
Regularly check your Loki receiver and transmitter, in all modes,
over a cable that gives a response you are familiar with.
Some power cables DO NOT radiate detectable power signals.
Power signals may not be present. It is advisable to use the
transmitter whenever searching for pipes and cables.
Do not use the Loki receiver depth estimation function to decide if
mechanical digging over a buried pipe/cable is appropriate.
ShallowAlert™ may not activate, even if a live power cable is
present.
Keep mobile phones away from cable and pipe locators when in
operation. Minimum distance 24”/60cm is recommended.
The Loki receiver cannot indicate whether a signal comes from a
single pipe/cable or from several cables or pipes bundled or buried
in close proximity to each other.
It is recommended that the Loki receiver and transmitter are
serviced at least once a year and have their calibration validated
using Schonstedt approved test equipment. Schonstedt will accept
no responsibility for repairs carried out by unauthorized repairers.
Even if using a Loki receiver and transmitter, ALWAYS DIG WITH
CAUTION.
Call 1-800-999-8280 for questions regarding the proper use, maintenance,
and repair of the Loki receiver and transmitter.
2
Loki Models
Two Loki models are available. The models are designed around the
needs of contractors and utility companies who need to detect utilities for
safe and efcient excavation and repair.
Contractor Model
Optimized for excavation and construction contractors,
the contractor model has 512 Hz, 8 kHz and 131
kHz frequencies built within the Loki transmitter. The
higher frequency 131 kHz can be used to nd well-
insulated, high impedance utilities such as twisted-
pair telecom cables or insulated pipe joints. A lower
frequency of 512 Hz is also built in to support the long
range locating of lower impedance cables, such as
power lines.
Utilities Model
Built for the challenge of detecting and tracing buried
water/drain pipes and telecom ducts, the low 512 Hz
frequency can be used to trace metallic pipes. The
higher 82 kHz frequency can support the detection
of jointed pipes, non-metallic pipes and ducts (when
there’s a metallic trace wire). The utility model can
also be used to locate multiple sonde frequencies.
OPTIMIZED FOR
UTILITIES
OPTIMIZED FOR
CONTRACTORS
3
Loki Receivers
Receiver Functions Contractor Utilities
Active locate
frequencies:
512 Hz • •
8 kHz • •
82 kHz •
131 kHz •
Inductive
frequencies:
8 kHz • •
82 kHz •
131 kHz •
Sonde
frequencies:
512 Hz • •
8 kHz •
33 kHz •
Passive locate
modes:
Power • •
Dual Mode: Simultaneously searches
for and identies
Transmitter and Power
signals
• •
Gain control: Manual gain • •
ShallowAlert™:Audio and visual warning
when a cable or pipe less
than 12” deep is detected.
Operates in Active and
Passive locating modes.
• •
NoiseProtect™:Automatically manages
the system gain to
compensate for strong
signals, e.g. from mains
power or substations, to
enable accurate locating.
• •
Loki Transmitters
Contractor Utilities
Induction 8 kHz • •
Induction 82 kHz •
Induction 131 kHz •
Direct Connect 512 Hz • •
Direct Connect 8 kHz • •
Direct Connect 82 kHz •
Direct Connect 131 kHz •
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Loki Receiver
1. On/Off Trigger.
Press and hold to use the Loki receiver.
2. LCD Screen with automatic depth
readout and frequency selection button.
3. Loudspeaker.
Detachable speaker for use in noisy
environments.
4. Sensitivity Control.
5. Mode Selector Switch.
6. Battery compartment.
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5 4
6
2 3
Screen Icons
The Loki receiver’s screen displays the following features:
Depth / Warning readout
Signal Strength
Mode/ShallowAlert
Bar graph
Frequency selection
Speaker
When using the Loki receiver in noisy environments,
the speaker can be detached and held closer to the ear.
To avoid excessive noise exposure, hold the
speaker no closer than 6” (15 cm) from the ear.
Prolonged use in this position should be avoided.
91dB(A)
6” (15 cm)
5
Loki Transmitter
The Loki transmitter is a general purpose, 1 Watt, transmitter that provides three
locatable frequencies, two induction frequencies and two signal strengths. By
default, the Loki Transmitter induces a signal directly into the ground.
1. On/Off/Frequency Selector. LEDs indicate
which frequency has been selected.
a. First press switches the transmitter on
and selects the lowest locate frequency.
NOTE: the lowest frequency is only available for direct connections and will not
work in induction mode.
b. Second and third presses select the mid and highest frequencies.
c. Fourth press turns the transmitter off.
2. Signal Boost
Press to boost the locate signal strength from low to high signal strength.
LEDs indicate which power level is active. Press again to return to standard
power.
3. Accessory Socket
Connects cables or optional accessories such as the Signal Clamp, Direct
connection lead or Live Plug Connector.
When connected, induction mode is disabled. A loudspeaker emits a pulsing
tone to indicate sufcient battery charge and a satisfactory direct connection.
4. Battery Access Panel. When no tone is audible the batteries must be
replaced.
5. Arrows
The arrows on the top panel label indicate the required transmitter alignment
above the pipe or cable when using Induction mode.
The arrows and the pipe or cable must be parallel. Alignment is not required
when the transmitter is in Direct Connect mode.
Note: Turn off the Loki transmitter and remove any cables or accessories before
changing batteries
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3
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Features
Depth Measurement
The Loki receiver will automatically measure and display the depth in Power,
Transmitter and Sonde modes.
Note: The Loki receiver does not measure depth in Dual mode.
Method: Locate the utility as follows. Hold the Loki receiver still and vertically cen-
tred above the detected line and across the line of the pipe/cable.
Note: A depth measurement will not be displayed where environmental conditions
are poor (e.g. weak signal or interference).
The measurement is to the centre of the pipe/cable or to the centre of the sonde,
which may rest at the bottom of the pipe.
Do not use the depth measurement function to decide if mechanical digging is
appropriate.
NoiseProtect™
All Loki receivers incorporate NoiseProtect™, a powerful signal-processing tool
that identies and automatically rejects electrical interference that may otherwise
overload the Loki receiver’s electronics. NoiseProtect™ allows the operator to
locate pipes and cables in electrically noisy environments such as near power
sub stations or near overhead high-voltage cables. Note that NoiseProtect™ will
not overcome very high levels of interference. In this situation the Signal Overload
Warning will appear (see Warnings).
ShallowAlert™
The ShallowAlert™ feature warns the operator of shallow pipes and cables.
When a shallow cable or pipe is detected (in any mode). ShallowAlert™ ashes
an asterisk and sounds a distinctive warbling audio tone.
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Using the Loki receiver
Mode Selection
Loki models are equipped with four locate modes;
Dual mode
Dual mode detects the Transmitter and Power signals simultaneously.
To select Dual mode, rotate the function switch until the LCD displays a
D icon. The sensitivity control adjusts the Power and Transmitter signal
levels simultaneously.
Power mode
Power mode detects power signals radiated by loaded power cables. To
select Power mode, rotate the function switch until the LCD displays a P
icon.
Transmitter mode
Transmitter mode detects the locate signals produced by a Transmitter.
There are various ways of applying the Transmitter signal, which is the
most reliable way to detect a pipe or cable. To select Transmitter mode,
rotate the function switch until the LCD displays a T icon.
Sonde mode
Sonde mode detects the locate signals produced by a Sonde. To select
Sonde mode, rotate the function switch until the LCD displays an S icon.
Getting Started
1. Grip the Loki receiver’s handle. Press and hold the trigger and listen for the
bleep indicating the batteries are OK. Replace both batteries if there is no
bleep or if the battery icon is ashing.
2. Select the appropriate mode.
3. Hold the Loki receiver with the blade vertical and with the lower edge just
above the ground. Do not swing it or tilt it more than a few degrees from the
vertical.
Swinging the Loki locator will affect locate accuracy.
8
Operation
Sweep the site holding the Loki receiver upright at your side. Continue the sweep
beyond the perimeter of the site. The presence of a buried pipe or cable will be
indicated by a tone emitted from the loudspeaker and a kick on the LCD’s bar graph.
Keep the Loki receiver blade vertical and move slowly backwards and forwards
over the suspected pipe/ cable. Reduce the sensitivity for a narrower response;
this will allow you to pinpoint the pipe or cable. With the Loki receiver use the meter
deection to aid pinpointing. Maximum meter deection and audible volume from
the speaker will indicate the position of the pipe or cable.
Determining a cable or pipe’s direction
When directly over the pipe/cable and with the sensitivity level set for a narrow
response, rotate the Loki receiver on its axis until the signal minimum is found.
The Loki receiver is directly in line with it when the bar graph and audio are at a
minimum.
Check for accuracy by varying the sensitivity control whilst rotating the Loki
receiver.
Trace the pipe/cable, keeping the Loki receiver vertical and moving it steadily from
side to side. Follow the line of the buried pipe or cable, marking it as required.
9
Scanning an area before digging
An initial sweep is recommended before carrying out a detailed scan.
1. Turn the function switch to dual mode to sweep the area for cables or pipes
radiating transmitter and power signals.
2. Turn the sensitivity control to maximum.
3. If the signal bar graph does not move from maximum, reduce the sensitivity
control so that the bar graph is half way before starting.
4. Sweep the area to be excavated. Begin by walking the perimeter of the
proposed excavation area, moving across the width in parallel sweeps around
0.5 meters apart. Position the Loki transmitter as shown.
5. Sweep across the width of the excavation site, moving up the length. Position
the Loki transmitter as shown.
6. If a cable or pipe is located, rst establish the direction of the cable or pipe,
then trace it across the area to be excavated, marking it if required.
7. Resume sweeping over the excavation site.
Note that sometimes the signal may be re-radiated from other pipes or cables.
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