Transcript
Operating Instructions
LD-TA/LD-TB transmitter
1. General Information
2. Procedure:
The LD-TA/LD-TB transmitters from Trotec amplify the sounds generated by leaks and present them either as optic or acoustic information before transmitting them via radio link to the central unit.
2.1 Sensor port
1.1 Sound Reception:
The sensor is connected to the BNC port (fig. A, ���). The type of sensor depends on the measuring distance, the material and the pressure. Type of Sensor
The easiest method to pick up a signal is to put sound receptors that are fixed by magnets onto the accessible parts of the pipe system (valve rods, hydrants, drains, household installations etc.). Because this reception method picks up the structureborne sound transmitted by the pipe and not the sound generated by the water, the sound reaches the point of reception with less intensity. This is especially the case when such a method is carried out using long or synthetic pipes. Hydrophones can be used as a means of intensifying the signal. Hydrophones are in direct contact with the liquid and can be placed at hydrants, water meters, drains etc.
Pipe Length
Sensor Trotec Standard
PVC, PE steel, cast iron, asbestos cement
< 20 m
Sensor Trotec l/Low f/Frequency
PVC, PE steel, cast iron, asbestos cement
200 m 10 - 40 m 100 - 300 m
Hydrophone
PVC, PE steel, cast iron, asbestos cement
> 30 m > 200 m
Selecting the Sensor
2.2 Operating the transmitter a) Powering up Use the ON/OFF key to power up the device.
1.2 Transmitter with Signal Amplifier: The signals that the sensor picks up are amplified in the transmitter. The intensity of the sound generated by the leak is displayed on the LCD. The signal can either be amplified manually or automati cally and then transmitted via radio link to the correlator where it is then assessed.
���
Fig. A – Transmitter connection points
Material
Amplification is performed automatically, the current sound level (fig. B, ���) and the minimum sound level (fig. B, ���) are shown on the display. b) Powering off Use the ON/OFF key to power off the transmitter. The software version appears briefly on the display. ��� ���
Fig. B – Transmitter control panel
��� Antenna (BNC)
��� ON /OFF
��� Compartment for
��� Display of the current sound level
oscillator receptor
��� Headphone jack
���
��� Input for oscillator receptor (BNC)
��� Charging connection
��� ���
��� ���
���
��� Numerical display of the lowest sound level during measuring (1-999)
���
��� Battery charge level (rest capacity) ��� Display of the selected frequency (high/low)
���
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��� Display of the amplification (dynamic amplification during measuring)
Operating Instructions LD-TA/LD-TB transmitter
EN
c) Changing the frequency It may become necessary to change the frequency. This depends on the type of material which the pipe is made of and the length of the pipe in question.
2.4 General information on charging the transmitter Display information during and after charging
Number left
When charging has been carried out correctly, a number with one of the following meanings is shown: 1: Charging cutoff due to delta peak 2: Charging cutoff due to overrun 3: Charging cutoff because end-ofcharge voltage exceeded
Number block middle
current voltage at the rechargeable batteries
Battery right
The battery capacity that has been reached is shown while the rechargeable batteries are being charged.
High: Metallic pipes: AC pipes:
Length of pipe < 100 m Length of pipe < 80 m
Low: Metallic pipes: AC pipes/
Length of pipe > 100 m
Synthetic pipes:
Length of pipe > 80 m
When the device has been powered up, press the ON/OFF key (fig. B, ���) and keep pressed until the frequency symbol on the display changes (fig. B, ���).
Miscellaneous
2.3 Dynamic amplification on / off The transmitter adjusts to the optimal amplification automatically after powering up. In addition you may wish to select a setting for the device which allows the amplification to be continuously adjusted according to the sound level on the pipe.
Powering off
LD-TA/LD-TB powers off automatically when a key is not pressed for 60 minutes.
Housing
Waterproof IP 65
Headphone jack
6.3 mm jack; volume can be adjusted at headphones
Press the ON/OFF key (fig. B, ���) and keep pressed until the desired symbol appears on the display (fig. B, ���) while the device is powering up. Technical Data
Transmitter
Signal receptor
EN
LD-TA
LD-TB
Display
graphic/numeric, automatic backlight
Displayed values
Current/minimum sound level, frequency high/low, amplification, charge indicator, capacity of rechargeable batteries
Radio frequency
433/434 MHz
Transmitter power
500 mw (approved)
Operating/Charging time
approx. 9 h / 3 h
Dimensions
225 x 165 x 100 mm
Weight
2.9 kg
Type
piezoceramic
Sensitivity
> 1000 pC/g
Mounting
Permanent magnet
Operating temperature.
-20° C to + 60° C
Operating Instructions LD-TA/LD-TB transmitter
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TRT-BALDTA-WM-01-EN · This publication replaces all previous publications. No part of this publication may be reproduced, processed using electronic systems, replicated or distributed in any way without prior written authorisation by us. Subject to technical modifications. All rights reserved. Names of goods are used without guarantee of free usage and used for the most part according to the manufacturers‘ syntax. The names of goods used are registered and should be considered as such. We reserve the right to modify the design in the interest of ongoing product improvement, such as shape and colour modifications. The scope of delivery may vary from that in the product description. All due care has been taken in compiling this document. We accept no liability for errors or omissions.
TROTEC GmbH & Co. KG
Grebbener Str. 7 · D-52525 Heinsberg Tel. +49 2452 962-400 · Fax +49 2452 962-200 www.trotec.com · E-Mail:
[email protected]
