CS Instruments LD 400 User manual

EN - English
Operating manual
Leakage detector
LD 400

Contents
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1Contents
1Contents................................................................................................................................................. 2
2Important information........................................................................................................................... 3
3Safety instructions ................................................................................................................................. 4
3.1 About this document ....................................................................................................................................................................... 4
3.2 Ensure security................................................................................................................................................................................. 4
3.3 Environmental protection ................................................................................................................................................................ 4
4General function description................................................................................................................. 5
5Device components and controls .......................................................................................................... 6
5.1 The front side ................................................................................................................................................................................... 6
5.2 Sensor head and connections .......................................................................................................................................................... 7
6Accessories............................................................................................................................................. 8
6.1 Acoustic trumpet..............................................................................................................................................................................8
6.2 Focus tube with focus tip ................................................................................................................................................................. 8
7Commissioning....................................................................................................................................... 9
7.1 Switching-on.....................................................................................................................................................................................9
7.2 Louder/quieter .................................................................................................................................................................................9
7.3 Laser.................................................................................................................................................................................................9
8Display.................................................................................................................................................. 10
8.1 Signal strength (level)..................................................................................................................................................................... 10
8.2 Volume/sensitivity .........................................................................................................................................................................10
8.3 Battery level ...................................................................................................................................................................................10
9Battery charging................................................................................................................................... 11
9.1 Protection of exhaustive discharge ................................................................................................................................................ 11
10 Applications...................................................................................................................................... 12
10.1 Leakage detection in compressed air systems ............................................................................................................................... 12
11 Special product features .................................................................................................................. 13
12 Scope of delivery.............................................................................................................................. 14
13 Performance chart ........................................................................................................................... 15
14 Appendix .......................................................................................................................................... 15

Important information
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2Important information
Dear customer,
thank you for purchasing our leakage detector LD400! Please read these operating instructions
thoroughly and observe our notices before performing the commissioning. Only if the described
regulations and notices are precisely observed, can the flawless function of the device and the safe
operation be guaranteed.
In case of a non-observance or non-compliance, no claims for the resulting damages can be asserted
based on the manufacturer's liability.
Any kind of modification of the equipment, provided that it does not correspond to the intended and
described processes, will lead to the expiry of the warranty and exclusion of liability.
The device is solely intended for the described purpose.
CS instruments GmbH shall not assume any warranty with respect to the suitability for any particular
purpose, and shall not assume any kind of liability for errors which are printed in this manual. Nor for
consequential damages in connection with the delivery, performance or use of this device.
Sales Office North Sales Office South
Am Oxer 28c Zindelsteiner Str.15
D-24955 Harrislee D-78052 VS-Tannheim
Tel.: [phone] Tel. : [phone]
Fax: [phone] Fax : [phone]
Mail: [email protected] Mail : [email protected]
Web: http://www.cs-instruments.com Web : http://www.cs-instruments.com

Safety instructions
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3Safety instructions
3.1 About this document
Read through carefully this documentation and familiarize yourself with
the product before putting it to use. Pay particular attention to the
safety warnings to prevent injury and product damage.
Keep this documentation to hand for easy reference when needed.
Pass on this documentation to any subsequent users of the product.
3.2 Ensure security
Use the product only appropriate, in accordance with the regulations and
within the parameters specified in the technical data. Do not apply force.
Measure the unit away from or near energized parts!
Please maintain a sufficient safety distance during the leak checking on
electric systems, in order to avoid dangerous electrical shocks!
Always switch on the device, before putting on the headphones! In case
of high signal levels (bar graph in the red zone), the volume can be
correspondingly high. The volume can be reduced with the help of the
sensitivity adjustment.
Never point the laser directly into the eyes! Absolutely devoid a direct
irradiation of the eyes of humans and animals!
Laser module: according DIN EN 60825-1:2015-07 Class 2 (<1mW)
Observe the prescribed storage and operating temperatures
By improper use of the device, the warranty will be lost.
3.3 Environmental protection
Disposal of faulty rechargeable batteries / empty batteries in accordance with applicable
legal regulations
Lead back the product after the end of the period of use to the separate collection for
electric and electronic devices (observe local regulations) or return the product to CS
Instruments GmbH for disposal.

General function description
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4General function description
Noises in the ultrasonic range develop when gases escape from leaks in piping systems (for example,
leaking screw connections, corrosion etc.). With the LD 400 even the smallest leaks, which are inaudible
to the human ear and also non-visible due to their size, can be detected even if they are several meters
away. The LD 400 converts the inaudible ultrasonic to audible frequencies. With the conveniently
wearable and soundproof headphones, these sounds can even be perceived in noisy environments.
The LD 400 is the further development of the proven LD 300, and is able to perform convincingly
through a significantly more sensitive sensor technology as well as an improved support during the leak
detecting process.
With the help of an integrated laser pointer, which serves as a targeting device, the leak can be located
even more accurately.
The sensitivity of the device can be further improved through the use of a specially designed acoustic
trumpet, which can ensure a greater concentration of the sound waves.
This acoustic trumpet acts as a directional microphone, that suppresses annoying background noises
and also facilitates the precise localization of leaks in inaccessible areas.
The internal laser pointer can also be used without restrictions due to the special construction of the
acoustic trumpet.

Device components and controls
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5Device components and controls
5.1 The front side
The device components and controls of the front side are described in the following picture.
LED status display
On/off switch
Volume/sensitivity decrease
Volume/sensitivity increase
Laser on/off button
2“ TFT color
display

Device components and controls
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5.2 Sensor head and connections
Ultrasonic
microphone
Opening of the laser pointer
Battery charge
socket
3.5mm jack for the
headphone

Accessories
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6Accessories
Further accessories are available for the LD400 with which the leak detection can be facilitated and
improved.
6.1 Acoustic trumpet
Through the concentration of sound waves, the acoustic trumpet creates an acoustic amplification
which enables a more precise detection of the leak. Through its special design, the integrated laser
pointer will remain usable. The acoustic trumpet is simply placed onto the sensor head and slightly
twisted until the latch head reaches the stopper. While doing this, please proceed with caution to
prevent an over-winding of the cone.
6.2 Focus tube with focus tip
The focus tube with the tip is used for the detection of very small leaks, in order to locate and pinpoint
them precisely. Just like with the acoustic trumpet, the tube is placed onto the sensor head and latched
with a twisting motion.
Acoustic trumpet
Focus tube with focus tip
Mounted
acoustic trumpet
Mounted focus tube
with focus tip

Commissioning
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7Commissioning
7.1 Switching-on
A pressing and holding of the on-off-button for about 1s, will switch on the device and a Start-Up
sequence will appear on the display. Pressing the button again will switch off the device.
7.2 Louder/quieter
With the volume increase and decrease buttons the volume in the earpiece and the sensitivity can be
increased or respectively decreased in 16 steps. By pressing and holding the respective button, the value
will automatically increase or decrease.
7.3 Laser
The integrated laser pointer can be switched on or off with the laser on/off button. In the on state, a
laser warning symbol will appear in the display. In the off state, the triangle will remain grey.
Warning: Never point the laser directly into the eyes! Absolutely devoid a direct
irradiation of the eyes of humans and animals!

Display
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8Display
The display elements are shown and described in the following picture.
8.1 Signal strength (level)
In the middle of the display, a bar graph is displayed depending on the received signal strength. A
numerical value of the received signal strength in dB will also appear in the upper-left corner of the
display. The max. level to be displayed is 60 dB.
8.2 Volume/sensitivity
The selected volume/sensitivity will appear on the right side in a bar with up to 16 steps.
8.3 Battery level
On the bottom left, a battery symbol is displayed with a battery level bar. The current battery voltage in
volts is also displayed below it.
Signal level display in dB
Display laser on/off
Battery level and
voltage
Bar graph display of the
received signal level (60dB
max.)
Bar graph for the selected
sensitivity (16 levels)