HT instruments HT5000 User Manual
ENGLISH
User manual
© Copyright HT ITALIA 2009 Release IT 1.00 - 16/03/2009
HT-5000
Indice:
1 SAFETY PRECAUTIONS AND PROCEDURES ..........................................................2
2 DESCRIZIONE GENERALE.........................................................................................3
3 PREPARATION FOR USE ...........................................................................................3
3.1 Initial ......................................................................................................................3
3.2 Supply voltage.......................................................................................................3
3.3 Calibration .............................................................................................................3
3.4 Storage..................................................................................................................3
4 OPERATING INSTRUCTIONS.....................................................................................4
4.1 Instrument description ...........................................................................................4
4.1.1 Description of the receiver RX5000 ............................................................................. 4
4.1.2 Display and control panel of RX5000........................................................................... 5
4.1.3 Description of transmitter TX5000................................................................................ 6
4.2 Connection and initial use of transmitter TX5000 ..................................................7
4.2.1 Transmitter signals and operation modes .................................................................... 7
4.2.2 Options for direct and inductive signal coupling........................................................... 8
4.2.2.1 Direct coupling on cables and pipes ................................................................................... 8
4.2.2.2 Coupling with special accessories .................................................................................... 10
4.2.2.3 Inductive signal coupling ................................................................................................... 11
4.2.2.4 Signal coupling in non-metallic pipes................................................................................ 13
4.2.3 Initial use of the transmitter TX5000 .......................................................................... 14
4.3 Use of receiver RX5000 ......................................................................................15
4.3.1 Modes of operation for the receiver RX5000 ............................................................. 15
4.3.1.1 Regulating the sensitivity level to match the reception signal strength............................. 16
4.3.1.2 Handling the receiver and locating the line ....................................................................... 17
4.3.1.3 Changing of the system settings ....................................................................................... 18
4.3.2 General site surveying ............................................................................................... 19
4.3.3 Determining the direction of a line.............................................................................. 20
4.3.4 Determining the depth of a line .................................................................................. 21
4.3.5 Functional test of the receiver .................................................................................... 24
5 MAINTENANCE .........................................................................................................26
5.1 Replacement floor cap of the receiver RX5000 ...................................................26
5.2 Replacement batteries of receiver RX5000 .........................................................26
5.3 Replacement batteries of transmitter TX5000 .....................................................27
5.4 Cleaning ..............................................................................................................27
5.5 End of life ............................................................................................................27
6 TECHNICAL SPECIFICATION...................................................................................28
6.1 Technical characteristics of receiver RX5000......................................................28
6.2 Technical characteristics of transmitter TX5000..................................................29
6.3 General specifications .........................................................................................29
6.4 Accessories .........................................................................................................29
6.4.1 Standard accessories................................................................................................. 29
6.4.2 Optional accessories.................................................................................................. 29
7 SERVICE....................................................................................................................30
7.1 Warranty conditions.............................................................................................30
7.2 Service ................................................................................................................30
EN - 1
HT-5000
1 SAFETY PRECAUTIONS AND PROCEDURES
This instrument conforms with safety Standard IEC/EN61010-1 related to electronic
measuring instruments. For your own safety and to avoid damaging the instrument follow
the procedures described in this instruction manual and read carefully all notes preceded
by this symbol .
When taking measurements:
• It is important to observe the general electric regulations of the particular country in
which the device will be setup and used, as well as current national regulations for
accident prevention and current company internal regulations (work, operating and
safety regulations
• The use of original accessories ensures system safety and reliable operation. The use
of other parts is not permitted and shall result in termination of the warranty
• Connections to live cables should be made by qualified personnel
• Keep you insulated from the object under test
• Do not touch exposed metal parts such as test lead ends, sockets, fixing objects,
circuits etc
• Avoid doing that if you notice anomalous conditions such as breakages, deformations,
fractures, leakages of battery liquid, blind display etc
• HT-5000 can only locate lines which emit a signal. Therefore it is important to always
exercise extreme caution when digging, even if no lines have been found
• Refer always to the user manual. An improper use may damage the instrument or its
components
The following symbols are used on meter and in manual:
CAUTION - refer to the instruction manual - an improper use may damage the
instrument or its components
Double insulated meter
EN - 2
HT-5000
2 DESCRIZIONE GENERALE
The HT-5000 location system is designed for the uncomplicated and user-friendly
determination of the location, orientation and depth of metallic lines (e.g. cable and pipe
lines). It can be used to probe areas for unknown lines or for locating specific lines.
HT-5000 (composed by a TX5000 transmitter unit and RX5000 receiver unit) is
distinguished by the following features:
• Robust construction for use in poor weather and in harsh environments
• Simple, user-friendly operation concept with a minimum number of controls
• Reliable battery status indicator
The RX5000 receiver is distinguished by the following features:
• passive signal modes for locating lines without the TX5000 transmitter
• active signal modes for locating lines / probes when used together with a transmitter
• Automatic depth determination when used together with a transmitter
• Semi-automatic depth estimation in passive signal modes
• Sensitivity level can be adjusted automatically or manually
• Lighted display for use in dim environments
3 PREPARATION FOR USE
3.1 INITIAL
This instrument was checked both mechanically and electrically prior to shipment.
All possible cares and precautions were taken to let you receive the instrument in perfect
conditions. Notwithstanding we suggest you to check it rapidly (eventual damages may
have occurred during transport – if so please contact the local distributor from whom you
bought the item).
Make sure that all standard accessories mentioned in paragraph 6.4. are included.
Should you have to return back the instrument for any reason please follow the
instructions mentioned in chapter 7
3.2 SUPPLY VOLTAGE
The TX5000 unit is supplied by 6x1.5V alkaline batteries type IEC LR20 included as
standard accessories. The battery life is about 40 hours. The RX5000 unit is supplied by
10x1.5V alkaline batteries type IEC LR06 with battery life of about 40 hours
3.3 CALIBRATION
The instrument complies with the technical specifications contained in this manual and
such compliance is guaranteed for 12 months
3.4 STORAGE
After a period of storage in extreme environmental conditions exceeding the limits
mentioned in paragraphs 6.1 and 6.2 let the instrument resume normal operating
conditions before using it
EN - 3
HT-5000
4 OPERATING INSTRUCTIONS
4.1 INSTRUMENT DESCRIPTION
4.1.1 Description of the receiver RX5000
Fig. 1: Description of the receiver RX5000
Item Description
1
Control panel with display (see paragraph 4.1.2)
Speaker with volume control
The speaker plays back various acoustic signals (e.g. beeps
with modulating pitch relative to the signal strength)
2
Quieter Louder
When the receiver is switched on, the volume is set at a
standard level. The receiver will only start with the volume
at a different level if the volume has been manually
increased before switching off the receiver
3
Headphone jack
To connect headphones with a 3.5 mm plug connector
4 Battery compartment
5
Floor cap
This replaceable floor cap serves to protect the housing
EN - 4
HT-5000
4.1.2 Display and control panel of RX5000
1
2
3
5
4
6
Fig. 2: Display and control panel of RX5000
Item Description
Light sensor
Light sensitive photo cells to automatically regulate the display
1
lighting
The display lighting can be manually activated for one
minute by briefly covering the light sensor
On/Off switch
By quickly pressing this button the receiver can be switched on
2
or off
The RX5000 will switch off automatically if no functions are
carried out within 7 minutes of being switched on
Display
3
Provides a visual indication of reception strength, line depth,
mode of operation, battery status and menu items
Function key 1
4
Depending on the status of the system, this button is used to:
• Manually decrease reception sensitivity
• Start measuring depth
Function key 2
5
Depending on the status of the system, this button is used to:
• Adjust reception sensitivity
• Start measuring depth
Function key 3
6
Depending on the status of the system, this button is used to:
• Select the mode of operation / receiving frequency
• Manually increase reception sensitivity
EN - 5
HT-5000
4.1.3 Description of transmitter TX5000
The TX5000 transmitter is distinguished by the following features:
• Inductive coupling of the signal using the integrated antenna or transmitter clamp
• Direct (galvanic) coupling of the signal using connected equipment (such as the
measurement cable and power socket adapter)
• Two-step adjustable transmission power (0.1W / 0.5W)
• Selectable signal output continuous or pulsed
Fig. 3: Front panel of transmitter TX5000
Item Description
Battery status indicator
1
When the battery status LED blinks in red, the batteries need
to be replaced
On/Off switch
By quickly pressing this button the TX5000 can be switched on
2
or off.
All appropriate LED’s blink when the transmitter is on,
depending on operating function
Signal type function key
3
This key is used to switch between continuous and pulsed
signal output
Jacks for connecting accessories
These jacks are used to create a direct galvanic connection
4
with the target line or to create a connection using a special
connection set (e.g. 100mm transmitter clamp or house
connection set)
Mode function key
5
This key is used to switch between inductive and direct signal
coupling (galvanically or via transmitter clamp)
Signal strength function key
6
This key is used to select one of two signal strength levels
(0.1W or 0.5W)
EN - 6
HT-5000
4.2 CONNECTION AND INITIAL USE OF TRANSMITTER TX5000
4.2.1 Transmitter signals and operation modes
The type and strength of the output signal can be configured by the user as follows to
meet the specific requirements of either the line to be located or the site to be surveyed:
Symbol Signal type
Pulsed signal
As it is more easily distinguished from other signals, the pulsed signal
is helpful for locating when there is interference within the frequency
range of the transmitter. This also helps to conserve the batteries
Depth measurements cannot be made using a pulsating signal
Continuous signal
This signal type has to be activated before a taking a depth
measurement
Symbol Signal strength
Low output signal strength (0.1W)
Low signal strength conserves the batteries
High output signal strength (0.5W)
Symbol Operation modes
Inductive connection
In this mode of operation the transmitter's signal is emitted through
the integrated antenna and is thereby inductively coupled with any
metallic lines located within a certain radius
Direct connection
In this mode of operation the signal is directly coupled with a metallic
line via the measurement cable which is connected to the jacks on
the front panel of the transmitter. Transmitter clamps, alligator clips or
power socket adapters (for example) may be used to connect the
measurement cable to the lines
EN - 7
HT-5000
4.2.2 Options for direct and inductive signal coupling
CAUTION
If the transmitter is connected to electrical service cables, it has to be
considered that the device is designed to achieve CAT II / CAT III 440 V and
CAT IV 300 V with Class 2 protection (double insulation) according to IEC / EN
61010-1. This means that the maximum voltage between the two terminals
must not exceed 440 V in measurement categories CAT II / CAT III and 300 V
in measurement category CAT IV
4.2.2.1 Direct coupling on cables and pipes
Direct galvanic coupling is practical for cables which are easily accessible and free of
current. The method of connection is dependent upon the position and nature of the lines
(e.g. insulation, cable conduit, accessibility of the cable ends).
Direct coupling presents a reliable option for selective cable location, as the signal can be
coupled onto a specific cable with virtually no loss.
The following illustration shows an example of direct coupling:
Fig. 4: Direct coupling on cables and pipes
CAUTION
If the lines being located are energised, the following five safety precautions
should be taken before connecting the transmitter:
1. Disconnect power supply
2. Secure against reconnection
3. Check for presence of current
4. Make earth connection and short circuit of parts
5. Cover or block access to adjacent components which are energized
If the system cannot be de-energized the use of the inductive coupling
clamp is possible to perform the location of objects
The following table explains various basic principles of direct galvanic coupling.
EN - 8
HT-5000
Application Principle of coupling
Single-wire lines or pipes (with
or without insulation against
earthing)
The distance between the earth
spike and the ends of the
connected lines should be as great
as possible
There is a danger of the return
current flowing through the
earth into adjacent lines, which
could result in their path being
follow
Single-wire cable with metallic
screen and earthing insulation
Short circuit between internal
conductor and screen at the end of
the cable with earthing at the
beginning and end of the cable as
well
If the earth connections made
are unfavourable, the current
in the internal conductor and
the return current in the screen
will cancel each other out.
Under certain circumstances
this can prevent the cable from
being detected. Alternatively, a
connection without an earth
connection can also be made
Multiple-wire cable (internal
conductor connected or
disconnected) with metallic
screen and earthing insulation
verso terra
Same application as in example 1
Metallic conduit (with or without
insulation against earthing)
The earth spike and the conduit
should be spaced as far apart as
possible. Under certain
circumstances, optimum
positioning of the earth spike may
require several attempts
If a return wire is available
The spacing of the return wire
should correspond to at least
10 times the depth of the line being
located
Pair of wires (with or without
screen) with short circuit at the
end of the cable
Adjacent conductors
horizontal Ö
Minimum of the reception
signal
vertically Ö
Maximum of the reception
signal
EN - 9
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