Baur TG 20/50 User manual

User Manual
Audio Frequency System Locator-Set
TG 20/50, TG 600
UL 30
Ref. No. 822-119 11/2005
BAUR Prüf- und Messtechnik GmbH e-mail: [email protected] Tel. [phone]
Raiffeisenstrasse 8, A-6832 Sulz/Austria internet: www.baur.at Fax [phone]

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Guide to this Operating Instruction
Copyright
Preface
For fast finding of important information the
corresponding text passages are marked with symbols
(symbols not stated here are self-explanatory).
More and special information concerning the
respective subject are available from BAUR.
Important information about the
instrument!
In any case, read carefully!
Important information text.
© BAUR Prüf- und Messtechnik GmbH, A-6832-
Sulz / Austria
All rights reserved.
No part of this publication may be reproduced,
transmitted, stored in a data processing system or
translated into another language without the
written permission of BAUR / Sulz, Austria.
In the interest of our customers we reserve the
right for modifications due to technical progress.
Illustrations, descriptions and delivery content are
therefore not binding.
This manual contains all information necessary for
the correct handling and operation of the
described system. Before using the system please
read carefully these Operating Instructions. If you
have any questions please contact directly:
BAUR Prüf- und Messtechnik GmbH,
Raiffeisenstraße 8
,
A
-6832 Sulz / Austria
BAUR Prüf- und Messtechnik GmbH, Raiffeisenstrasse 8
A-6832 Sulz / Austria
or refer to your nearest BAUR representative.
Tel. [phone]
Fax. [phone]

4
Safety precautions
The Audio Frequency System is built in accordance
with today’s state of engineering and is safe to
operate. Individual components and the finished unit
are inspected continually by our qualified staff within
the framework of our Quality Assurance Provisions.
Each unit is subjected to thorough testing prior to
shipment. It is imperative to every person who is
involved with the installation, start-up, operation and
maintenance to have read and understood the
complete Operating Instruction. It is the
responsibility of the customer to ensure that only
authorized persons may be allowed to use the unit.
Operators must notify immediately any changes to
the unit that detract from the its safety.
The Audio Frequency System Locator Set is
intended to be used exclusively for route tracing
and fault location of electrical cables and
metallic gas and water pipes.
Any other or additional use is deemed to be in
contravention of the intended use. The
manufacturer shall not be liable for damage
resulting from any such use. In such a case the risk
shall be borne solely by the user.
The local safety and accident prevention
regulations are always applicable to the
operation of the unit.
Warranty
At the customer’s written request we undertake to
repair or replace at our discretion and as quickly as
possible all parts that become faulty as the
demonstrable result of poor material, faulty design
or defective workmanship. We shall bear the costs
of any faulty parts requiring replacement, but not the
costs of transport to us and back to the customer,
nor the costs of packing and insurance! The 12
month warranty time starts from delivery. We shall
not be liable for any damage resulting from normal
wear and tear, improper handling, non-observance
of Operating Instructions and safety regulations. We
shall also refuse to accept any liability if the
customer carries out repairs or changes to the unit
themselves or has others carry them out! The
warranty does not cover damage in transit,
batteries, fuses and any readjustments in
accordance with the Operating Instructions!
We draw attention in addition to the ‘General Sales
and Business Conditions’ of:
BAUR Prüf- und Messtechnik GmbH
Raiffeisenstrasse 8
A-6832-Sulz / Austria

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Contents
1Product information 6
2Description of Locator-Set 7
2.1 Audio Frequency Generator TG 20/50 and TG 600 8
2.1.1 TG 20/50 9
2.1.2 TG 600 10
2.2 Universal Locator UL 30 11
2.2.1 Menu 12
2.3 Magnetic and acoustic sensors 13
2.4 Technical data 15
3Put TG 20/50 into operation 18
4Put TG 600 into operation 21
5Put UL 30 into operation 24
5.1 Startup 24
6Fault location 25
6.1 Acoustic fault location 25
6.2 Distance manhole 28
6.3 Sheath fault 29
7Route tracing 33
7.1 Connection of frequency generator 34
7.2 Minimum and Maximum method 35
7.3 Depth determination 36
7.4 Terrain examination 37
7.5 Cable identification 37
7.6 Determination of joints (Twist method) 39
8Maintenance 41
9Packing and delivery 43

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1 Product information
In combination with Surge Voltage Generators (SSG / STG) or Audio Frequency Generators
(TG20/50 and TG600) and accessories like BM 30, earth sticks, the Universallocator UL 30
is used for:
-pin-pointing of cable faults
-route tracing of buried cables or metallic pipes
-propagation time measurement
-Cable sheath fault location
-Combined tracing and pin pointing
With the help of an audio frequency transmitter (TG20/50 or TG600) an electromagnetic field
in the cable is generated.
Depending on selected tracing and measuring methods, the detection is done by an
electromagnetic sensor
The received electromagnetic and acoustic signals are amplified and indicated by the Audio
Frequency Receiver UL 30:
-acoustically via the integrated loudspeaker or a headphone (to be connected)
-optically on the integrated LCD display.
In connection with a Surge Voltage Generator SSG the surge voltage impulse (magnetic
field) is indicated on the pointer UL 30 when performing a coincidence measurement. The
impact noise is heard via headphone of the loudspeaker.
With the propagation time measurement the time difference between magnetic and acoustic
impulse is evaluated. The minimum of the time difference indicates the cable fault position.
Special advantages:
-at cable faults which acoustically are very difficult to locate, the coincidence
measuring method gives additional help to verify the faulty point.
-with cables in pipes the fault position can be located accurately above the cable
route.

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2 Description of Locator-Set
The Audio Frequency System Locator-Set is used for route tracing and fault location of:
-electrical cables
-metallic gas and water pipes.
Functions and procedures
With the help of an audio frequency transmitter (TG20/50 or TG600) an electromagnetic field
in the cable is generated. The field is detected by sensors (e.g., detecting rod SP 30,).
The signal is amplified by the audio frequency receiver UL 30 and indicated acoustically via a
headphone or a loudspeaker or optically on the display.
Fields of application
With its various sensors and by selecting specific tracing and measuring methods a wide
range of applications is possible:
-Routing of cables and metallic pipes
-Depth determination of cables and metallic pipes
-Cable selection
-Cable detection even on live cables and lines
-Location of cable joints and branches
-Accurate pin-point fault location according to the BAUR twist method in conjunction
with the powerful Audio Frequency Transmitter TG20/50 or TG600.
-Accurate pin-point fault location in conjunction with the Surge Voltage Generator
SSG.
-Accurate pin-point fault location in piped cables by application of the acoustic
propagation time measurement.

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2.1 Audio Frequency Generator TG 20/50 and TG 600
Audio Frequency Generator TG 20/50
Description TG 20/50
The Audio Frequency Transmitter Locator TG
20/50 is a powerful, battery operated instrument
with an integrated power supply unit. An output of
50 VA is available during mains operation and
therefore application for accurate pin-point fault
location on twisted multi-core cables is possible.
As well, cable tracing can e done.
Audio Frequency Generator TG 600
Description TG 600
The Audio Frequency Transmitter Locator TG 600 has
been special designed for the pin-pointing location of
cable faults and joints.
Due to indication of input and output current, selection
of the correct adjustment is facilitated.
Beside the use for cable fault location, also high
frequency burn down processes can be carried out,
particularly on signal or telecommunication cables.
The maximum output current can be switched
between 60VA and 600VA.

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2.1.1 TG 20/50
3 9 14 13 13 11
15 7 8 6 2 5 10 1 4 12
Display elements:
1Power control
2Charge control
3Pointer instrument for Iout and Iin and battery control
4Indication of impedance level
Operating elements:
5 ON switch and mode selector
6Button for battery control and instrument illumination
7 Button for indication of Iin
8Button for switching measuring range x 0.1 for Iout
9Button for automatic or manual impedance adjustment
10 Regulating switch for output current
Interfaces:
11 Mains connection
12 Connection for external battery
13 Output socket
14 Protective earth terminal
15 Connection for loop antenna

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2.1.2 TG 600
18 17 16 4 4 6 8 10 2 3 14 15
1 5,7,9,11,20,19,12 13
Display elements:
1Input current of adjusting transformer
2Output current of adjusting transformer
3Overtemperature indication
Operating elements:
4 Mains ON
5Mains OFF
6Frequency selection 2 kHz
7Frequency selection 10 kHz
8Continuous operation
9Impulse operation
10 Output power 60 VA
11 Output power 600 VA
12 Impedance selector switch Zi
13 Power control
14 Measuring range selector for output current
15 Push-buttons for compensation capacitors
Interfaces:
16 Mains connection
17 Protective earth terminal
18 Output sockets
19 Fuse F1
20 Fuse F2

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2.2 Universal Locator UL 30
Display
Switch button
Right – for navigation
or increase
OK
ON / OFF button
Loudspeaker
Backlight
Left – for navigation or
decrease
Down – for navigation
or increase
Up – for navigation
or increase
Input sockets for sheath
fault sticks
Headphone outlet Socket for BM 30 / SP 30
Removable rear cover
with battery compartment

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2.2.1 Menu
A application-oriented menu structure allows fast and easy operation of the UL 30. At main
menu the application could be selected. The following submenus contain the special fault
location- respectively tracing methods.
Fault location:
Route tracing:
Setup:

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2.3 Magnetic and acoustic sensors
Several sensors are available for reception of magnetic and acoustic signals which are used
depending on selected tracing and measuring method.
BM 30
KH 30
The highest sensitivity of the ground microphone is at
the range of 200Hz. Therefore, it is most suitable for
pin-pointing of flashover faults according to the Surge
Voltage method. Its special decoupled housing
suppresses possible ambient noises.
Included into the BM 30 is a magnetic sensor to
enable the propagation time measurement and a
tracing of cable line while pin pointing.
The headphone KH 30 is connected to the Audio
Frequency Receiver via a 3-pin jack plug (6.3mm).
For suppressing ambient noises the type KH20/S
headphone is used.

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SP 30
The detecting rod consists of a searching coil
adjusted to an oscillating circuit by condensers. Using
the switch on the handle of the detecting rod the
frequency can be adapted to the signal frequency of
the Audio Frequency Generator. The hinged
searching coil can be turned by 45° or 90°. The 45°
position is used for determination of the depth of
buried cables.

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2.4 Technical data
Audio Frequency Generator TG20/50
Output power
0 - 50VA in mains operation
0- 20VA in battery operation
Output current max. 8 A
Output impedance in 7 steps
1 / 3 / 10 / 30 / 100 / 300 / 1000 W
with automatic adaptation
Frequencies 2 frequencies, switchable
standard: 2kHz and 10kHz
other frequencies optionally
480 Hz
800 Hz
1030 Hz Df - ± 0.1 %
1090 Hz k-faktor k - 1,5 % at 4 VA
1350 Hz
1450 Hz
2000 Hz
9820 Hz Df - ± 0.1 %
10000 Hz k-faktor k - 3 % at 4 VA
12000 Hz
Operating modes Continuous operation and impulse operation
Display Illuminated instrument with indication of Iout (in A); switchable via button Iin
(in A);
Battery test
Indication of impedance levels with LED
Output Non-contacting pole terminals (safe from contact) and socket for loop
antenna on side cover
Power supply Mains connection
110/120, 220/230, 240 V, 50-60Hz
Power consumption 150VA at 50VA output power
Internal lead acid battery 12V / 9.5Ah
External battery
12V - 24V (reverse battery protection)
Charging unit Overcharge protection
80% of battery capacity is reached within 14 hours; when in mains supply,
charging is made in all operating modes
Low level discharge
protection Unit is switched off before battery is completely discharged
Operating time battery at 20VA approx. 2.5 hours
Operating temperature -20°C to +50°C
Dimensions 290 x 130 x 250 mm
Weight approx. 9.5 kg

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Audio Frequency Generator TG 600
Output power at 2 kHz in 2 steps 600VA / 60VA
at 10kHz in 2 steps 450VA / 45VA
Output current max. 30 A
Output impedance in 8 steps
0.3 / 0.8 / 1.8 / 4 / 10 / 30 / 100 / 300 W
Frequencies Quarz-stabilized: 2kHz and 10kHz;
other frequencies on request
Operating modes Continuous operation and impulse operation
Display 2 instruments for indication of Iin and Iout
Reactive power
compensation adjustable in 63 steps
Power supply 110/120, 220/230 V, 50-60Hz
Power consumption 1800VA at 600VA output power
Overload protection Overtemperature switch-off and indication
Operating temperature -20°C to +40°C
Dimensions 505 x 255 x 330 mm
Weight approx. 38 kg

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Universal Locator UL 30
Receiving frequency 50Hz – 10kHz, 815Hz, 2kHz, 10kHz
+ 2 additional frequencies on request
Filter digital
Üassive reception 50/60Hz mains signal
amplification 0-38 dB
propagation velocity range 0-96ms
operating temperature -20°C….+55°C
protection water- and dust protected
power supply 4x1.5V cells (IEC LR 6)
battery life
(normal operation) approx. 50h
weight 550g

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3 Put TG 20/50 into operation
Operating the Audio Frequency Transmitter TG20/50 either
-with mains supply (110/120V, 220/230V or 240V / 50Hz or 60Hz), output power of
50VA
-via an internal battery (for mobile use), output power approx. 20VA
-via external battery (12V to max. 24VDC)
Remark: Pay attention to correct polarity (+ red, -black)!
Designed for continuous operation
In all operating modes the unit is designed for continuous operation. The output power of
50VA is only reached with:
-mains operation or external battery operation (with 24VDC)
-optimum adjustment.
During mains and battery charging operation, please observe that:
The voltage setting of the mains voltage socket must correspond to the local mains voltage!
Carry out battery test
The integrated battery (=lead-acid battery) is protected by a low discharge protection circuit
causing the TG20/50 unit to be switched off at a discharge voltage of 10.5V.
Before each mobile use and battery operation, please check the battery state of charge.
Check state of charge using control button
Charge battery
If pointer of instrument is below the marked range:
-Connect TG20/50 to mains the charging control lamp „charge” lights up. The battery
is charged by the built in charger (with an overload protection).
-General battery charging time should be at least 12 to 14 hours!
The TG20/50 unit can also be used during the battery charging process. That means, the
integrated battery is also charged during each mains operation.
Do not store lead acid battery in a discharged state. Charge the battery all 14 days during the
night!
☞

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Connection of Audio Frequency Generator
Connecting the TG20/50 unit is made either via the output sockets “output” (galvanic con.),
the clip on device AZ 10 or the loop antenna RA 10
Do not connect live cables and lines (e.g. interference noises, mains pick-ups) to the sockets
‘output’! Danger of unit destruction!
Before connection, always check if line is zero potential!
Carry out galvanic or inductive connection
1 2 2a
4
Step Procedure
1 Connect earth lead.
2a Make galvanic connection: Connect a dead
cable/line to the two black sockets ‘output’.
2b Make inductive connection: Remove side cover
and connect loop antenna.
3 Turn output regulator completely to the right stop.
Observe max. permissible voltage of connected
line.
4 Set mode selector to the desired operating
frequency. Power Control lamp lights up.
Carry out either
step 2a or 2b
Switch on
Audio Frequency
Generato
r
3
2b
U = 0V !!

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Carry out automatic or manual load adaption
1a,1b
4 3
Condition for automatic load adaption:
-output current Iout > 10mA!
Make a manual load adjustment at:
-high impedance load
Carry out automatic (1a) or manual (1b) load adjustment
Step Procedure
1a Press button to pos. „auto“.
If an LED of the impedance adjusting level lights up:
- the output impedance is adjusted
- a voltage is on the „output“ sockets
1b Press button to pos. „man“ as long as the desired adjusting level is reached.
2 Adjust desired output current using the output regulator.
3 Press button Iout = instrument range is switched to 1A.
4 Press button Iin. The current consumption of the amplifier is indicated. With battery
operation:
Iin=3A-battery 9Ah=approx. 3 hours of operating time
Audio Frequency Generator TG20/50 is ready for operation.
Overload protection
The power output stage of the TG20/50 unit is protected by a terminal circuit breaker.
After a switch off:
-using the mode selector - switch on again after a certain cooling period
2