Impex LD8000 User manual

Version 1.0
20. November 2008
IMPEX HighTech GmbH
Hovesaatstr. 6
48432 Rheine
Germany
Phone: [phone]
FAX: [phone]
Laser Diode Driver
LD8000
User Manual

Laser Diode Driver LD8000
2
Ver. 1.0
Read this manual carefully before operating the device!
Check the contents of the box for transport damage and completeness. In case of
unregularities contact Impex HighTech GmbH immediately!
The LD8000 is a OEM product. As such, it is intended only for integration into other
equipment. The customer is responsible for certification of any kind.
Before connecting or disconnecting any cable, switch off the device main power
switch!
Meet all necessary precausions to except damages throuh ESD (electrostatic discharge)!
Always wear suitable laser goggles to protect your eyes when working with lasers!
Before turning the laser on, check all parameters and settings for tolerability by the
connected components!
Do not open the case of the LD8000! High voltages inside! Warranty voids, if the case
label was removed!
Terms and product names may be registered trademarks of their owners.
!

Laser Diode Driver LD8000
3
Ver. 1.0
Table of contents
1. INTRODUCTION.....................................................................................................................4
Features....................................................................................................................................... 4
Package contents......................................................................................................................... 4
Optional components .................................................................................................................. 4
2. SPECIFICATIONS...................................................................................................................5
3. HARDWARE DESCRIPTION................................................................................................6
Dimensions ................................................................................................................................. 7
Laser head connector .................................................................................................................. 7
Interlock ...................................................................................................................................... 8
Photo diode input ........................................................................................................................ 8
Modulation input......................................................................................................................... 8
TTL output.................................................................................................................................. 8
TTL input.................................................................................................................................... 8
Indicators .................................................................................................................................... 8
4. PRINCIPLES OF OPERATION.............................................................................................9
4.1 Standalone operation..................................................................................................................... 9
Navigating through the menu...................................................................................................... 9
Rearranging the list ..................................................................................................................... 9
Changing a parameter or a value................................................................................................. 9
4.2 The LD Control software............................................................................................................. 10
Installing LD Control (Windows)............................................................................................. 10
Installing USB driver (Windows) ............................................................................................. 10
Overview................................................................................................................................... 10
System card............................................................................................................................... 11
Current card .............................................................................................................................. 12
Temperature card ...................................................................................................................... 13
PID Controllers Card ................................................................................................................ 13
Monitor card.............................................................................................................................. 14
4.3 Laser modulation modes.............................................................................................................. 15
Gate Mode................................................................................................................................. 15
5. PROTOCOL DESCRIPTION ...............................................................................................16
Examples................................................................................................................................... 16
Instructions list.......................................................................................................................... 16
6. WARRANTY...........................................................................................................................18

Laser Diode Driver LD8000
4
Ver. 1.0
1. Introduction
Congratulations on your purchase of the Impex HighTech LD8000 laser diode driver with
integrated temperature controllers. The LD8000 includes all necessary components to utilize a
semiconductor laser diode or a diode pumped solid state laser system.
Features
•Laser diode current driver with several modulation options: continuous wave, pulsed
(with internal pulse generation), external modulation, external pulse. In pulse modes an
adjustable off-current and an external gate input is available.
•Two integrated PID temperature controllers with outputs for thermoelectric cooler (TEC/
peltier) elements provide determined temperature operating point of laser diode and laser
crystal.
•Several interfaces to integrate the device into existing configuration: external TTL input
for pulse generating, photo diode input for constant power mode, analog modulation
input for external feedback circuit.
•User friendly control panel allowing quick access to common parameters and values.
•USB control interface with documented ASCII protocol and device drivers for all comon
operating systems (Microsoft Windows 98SE...Vista 32/64bit, CE.NET, Linux, Mac OS
8...X PowerPC/Intel).
•PC software for control and data logging included (Microsoft Windows only. For other
operating systems, please ask Impex HighTech).
•Security components including: key switch, laser state indicating LEDs, interlock, current
limit, specified temperature window.
Package contents
•LD8000 Laser diode driver
•CDROM with LD Control software and drivers for Microsoft Windows, this user manual
in Portable Document Format (PDF).
•Power supply cable
•USB A-B cable
•Interlock dummy plug
•2 keys
Optional components
•Full Color Control Panel running LD Control Software (Netbook)
•Active Photodiode Sensor Unit with Pulse- and Average outputs.
Figure 1. Optional Full Color Control Panel.

Laser Diode Driver LD8000
5
Ver. 1.0
2. Specifications
Parameter Unit Min Typ Max
Laser diode current A 0 8
Current setting step mA 1
Current measurement accuracy
1
% 2
LD compliance Voltage V 0 4
LD pulse width LMW µs 10 LMPmax-10
LD pulse periode LMP µs LMWmin+10 999999
Pulse repetition rate Hz 0.001 50000
Pulse rise time (s. Figure 2) µs 2 5
Pulse overshoot % 1 2
TTL Low level V 0 0.8
TTL High level V 3 5.5
Temperature setting range °C 10 60
Temperature stability °C ±0.01 ±0.02
TEC controller voltage V -11.5 11.5
TEC controller current A -8 8
NTC sensor resistance at 25°C kΩ10
NTC sensor beta value - 3967
Power supply mains voltage VAC 85 264
Power supply frequency Hz 47 63
Operating temperature °C 10 40
Relative humidity (non condensing) % 5 90
Dimensions (B/H/T) mm 110/115/264
Note 1: In pulsed mode the average current is measured.
Figure 2. Timing of the laser current pulse

Laser Diode Driver LD8000
6
Ver. 1.0
3. Hardware Description
Figure 3. Front view
Figure 4. Back view
Pos. Description Pos. Description
1 LCD Display, 4x20 characters 9 USB connector, type B
2 Rotary knob 10 Photo diode input, BNC
3 Up button; lit if operable 11 Laser head connector, HD D-SUB25
4 OK button; lit if operable 12 Interlock connector, 3.5mm TS connector
5 Down button; lit if operable 13 Power supply connector, IEC 60320-C13
6 Laser OFF button/indicator 14 External analog modulation input, BNC, 2A/V
7 Laser ON button/ indicator 15 TTL output, BNC
8 Power key switch 16 TTL input, BNC
1
2
6
7
8
3
4
5
9
10
11
12
13
14
15
16

Laser Diode Driver LD8000
7
Ver. 1.0
Dimensions
Figure 5. Dimensions
Laser head connector
Figure 6. Laser head connector pinout
Pin Function Pin Function Pin Function
1 Diode TEC anode 10 Diode NTC Sensor 19 Diode TEC cathode
2 Diode TEC anode 11 Diode NTC Sensor 20 Diode TEC cathode
3 Crystal TEC cathode 12 Crystal NTC Sensor 21 +12V
4 Crystal TEC anode 13 Crystal NTC Sensor 22 Ground
5 Harm. TEC cathode
1
14 Harm. NTC Sensor
1
23 Photo diode signal input
6 Harm. TEC anode
1
15 Harm. NTC Sensor
1
24 Laser diode cathode
7 Laser diode anode 16 Pulse signal input 25 Laser diode cathode
8 Laser diode anode 17 Ground 26 Laser diode cathode
9 Laser diode anode 18 +5V Scr Ground
Note 1. Not connected in the actual hardware revision. The pinout for nonlinear crystal
(harmonic generation) temperature controller is given to support future developments.

Laser Diode Driver LD8000
8
Ver. 1.0
Interlock
The interlock safety feature implements a possibility to turn the
laser off, when a remote switch is beeng activated. For example, a
door switch turns the laser off, when a person enters the room. The
jack is a standard 3.5mm mono phone jack (TS). The switches
should be of the normaly closed type.
Multiple switches can be used by series connection (wired-AND).
If the feature is not needed, a shorted dummy jack should be
plugged into the connector (one is shipped with the device).
Figure 7. Interlock connector
pinout
Photo diode input
The voltage at the inner pin of the BNC connector 10 (Figure 4) is measured and converted to a
digital value. The constant power function holds this value by tracking the target current.
Please note, that the value representing the photo diode signal is neither calibrated nor it has a
unit.
Some custom modifications may have this signal internally connected to pin 23 (Figure 6) of the
laser head connector. In such cases, the photodiode is integrated into the laser head, and a high
impedance input voltmeter or scope can be connected to this connector to monitor the power.
Modulation input
In external analog modulation mode, voltage at the inner pin of this connector is converted to
diode current with amplification ratio of 2 Amperes of diode current per 1 Volt modulation
voltage.
TTL output
In pulsed modes (internal or external), the level at the inner pin of this connector indicates
wether the laser is driven with the Target current (High) or the Base current (Low).
TTL input
In external pulse mode, the level at the inner pin of this connector determines wether the laser
should be driven with the Target current (High) or the Base current (Low).
In modes with internal pulse generation (s. 4.3 Laser modulation modes) and enabled gate mode,
the level at the inner pin of this connector determines wether pulses of Target current (High) or
the Base current (Low) should be driven through the laser.
Indicators
All buttons on the front panel have integrated LEDs, indicating the state.
•The laser ON indicator (7) lights green, when the laser is on.
•The laser OFF indicator (6) lights red, when the laser is off.
•The buttons Up, Down and OK are enlighten blue, if their operation makes sense in the
current state. These indicators are dimmed, if manual control has been disabled by remote
control.

Laser Diode Driver LD8000
9
Ver. 1.0
4. Principles of operation
Connect the laser head to the propriate connector (11, Figure 4) prior to connecting
power cables and turning on the device!
To power on the device, turn the key clockwise to vertical orientation, so that the key points to I.
The LD8000 can be operated either on the front panel, or remotely through the USB interface.
Before turning the laser on check all parameters and settings for tolerability by the
connected components!
4.1 Standalone operation
Navigating through the menu
The menu displayed on the front panel of the LD8000 is set up as a
long list of all parameters and values in one column, one line per
each. Four lines are visible on the LC display at a time. To view or to
set other parameters, the list can be scrolled up or down by the Up
and Down buttons respectively.
Rearranging the list
For better visibility, the list order can be rearranged by the user. To
move some line Up or Down, scroll the list so that the desired line is
on the top position. Then press the OK button – the first character of
the line starts to blink – and move the parameter with the Up and
Down buttons. When the desired position is achieved, store the state
with the OK button. If you don’t store the state, the previous state
will be returned automaticaly after 5 seconds.
Changing a parameter or a value
To change a value or a parameter, scroll the list so that the line with
the desired value/parameter is on the top position and rotate the
rotary knob. The cursor starts to blink to the left. Rotating the knob
clockwise will increase the value, rotating it counter clockwise will
decrease the value. To store the new value and make it active press
the OK button. If you don’t want to store the new value, wait for 5
seconds without pressing the OK button and the old value will be
restored.
!
LD Current 0mA
LD Temp 25.00 C
Crystal Temp 25.00 C
LD Voltage 0mV
Modulation Int CW
LD Cur Limit 8000mA
LD Cur Base 000mA
LD Temp Ctrl ON
Cry
stal T Ctrl
OFF
.
.
LD Current 0mA
LD Temp 25.00 C
Crystal Temp 25.00 C
LD Voltage 0mV
Modulation Int CW
LD Cur Limit 8000mA
LD Cur Base 000mA
LD Temp Ctrl ON
Crystal T Ctrl
OFF
.
.
LD Current 0mA
LD Temp 25.00 C
Crystal Temp_25.00 C
LD Voltage 0mV
Modulation Int CW
LD Cur Limit 8000mA
LD Cur Base 000mA
LD Temp Ctrl ON
Crystal T Ctrl
OFF
.
.
!

Laser Diode Driver LD8000
10
Ver. 1.0
4.2 The LD Control software
The LD Control software application gives you the ability to adjust parameters quickly, to view
values on the screen and to save them to a file for documentation
Since the remote control feature qualifies to operate the laser without intervisibility,
special considerations and precausions must be met! Do not operate the laser in rooms,
where no sufficial laser safety is guaranteed! See also the chapter Interlock.
Installing LD Control (Windows)
To install LD Control software, run setup.exe from the supplied CD-ROM. This will install the
application itself and some additional runtime components. Follow the instructions of the
installer software and reboot the computer, if you will be asked to do.
Installing USB driver (Windows)
When you first time connect the LD8000 to the PC, the operating system will ask for a driver.
Select the option “Search in other places” and point to the folder USB Driver\Windows on the
CD-ROM. The device is equipped with a USB-serial converter module, so a connection to it is
made through a virtual COM Port. The number of the COM Port interface is being assigned by
the operating system automatically. To find out the corresponding COM Port number, start the
Device Manager (Start – Run... - devmgmt.msc) and look for “USB Serial Port” entry in the
Ports section, the assigned COM Port number is shown in parentheses.
Overview
Every control and indicator is equipped with online description. Get the mouse pointer over an
element for view seconds and the description will pop up.
The application is divided into five parts, represented by a card index. On the System card you
can setup the communication interface and some basic parameters. On Current and
Temperature cards you can set all adjustable values to run the laser properly. The PID
parameters of the temperature controllers can be tuned on the PID controllers card. The
Monitor card shows and logs actual values such as laser diode current and temperatures.
Right to the card tabs there are indicators for Connection and eventually occured Error. When a
connection to the device is not established (the Error indicator is lit and the Connection indicator
is dim), then the other indicators and parameters are not valid and are greyed out. See description
of the System card in such case.
Further there is a Help button and an Exit button for closing the program.
The most important element in the lower part of the user interface is the Laser ON/OFF button
at the bottom left corner. This button is also an indicator: when the laser is on, the button is
green, when the laser is off, the button is red.
To the right of the Laser ON/OFF button are the Interlock indicator, that is green, if interlock is
OK and red, if the interlock contact is broken and the Power Supply indicator, showing whether
the supply voltage is in the specified range (green) or not (red).
All parameters and setting can be saved to a file and loaded afterwards by the buttons Load and
Save accordingly. You can also create multiple settings-files for different lasers and load them
!

Laser Diode Driver LD8000
11
Ver. 1.0
when using the propriate laser. The button Defaults loads default values, that are programmed
into the device by manufacturer.
The Copyright notice and the Impex HighTech logo are linked to the Impex HighTech website.
In this row, there are value indicators for quick control and monitoring switches (green round
buttons). Only if the monitoring switch is enabled (i.e. it is lighting lime-green), the appropriate
actual value is transferred from the device and monitored in the field to the left and on the
monitor page. The rectangular indicators to the right light red, if something is wrong (from left to
right): laser diode current, laser diode voltage, out of temperature range (upper or lower limit).
System card
Figure 8. System card
COM Port Number sets the number of the virtual COM Port, that is given by the USB to serial
converter driver (see chapter Installing USB driver).
Baud Rate sets the transfer speed and should be set to 57600 bps in current revision.
The window Communication Status shows the error messages if some communication error
occur. The Error indicator lights up in such case.
The Clear Error button clears the Communication Status window and the Error indicator turns
off.
If the device is turned off or USB cable was removed, the connection is lost. After the problem is
solved and the driver is connected properly, press the Reconnect button to reactivate
communication.
The switch Manual Control enables or disables keys and the knob at the front panel of the
device. This function is used to prohibit a change of values if the laser is operated remotely.
The fields Laser Diode Life Time, Driver Serial Number and Driver Software Version are
self-explanatory.

Laser Diode Driver LD8000
12
Ver. 1.0
Current card
Figure 9. Current card
First of all the Modulation method and source should be set (see chapter 4.3 Laser modulation
modes). This can be done either with the small arrows right to the word Modulation, or by
clicking the picture and choosing the corresponding pictogram from poped up table. According
to the modulation method, other controls of this tab are activated or deactivated.
Here you also can set the Maximum Voltage of the laser diode. If this value is achieved, the
laser turns off automatically and the LD Voltage Error indicator (green, rectangular) lights up.
The Gate Mode is available in modulation modes with internal pulse generation. See chapter 4.3
Laser modulation modes for details.
Constant output power can be achieved, when a photodiode is used to measure the intensity of
the output. The device measures the voltage at the photodiode and converts it to a digital value,
called Photo Diode Signal. When you click on Hold Actual Power, the Current target will be
tracked to hold the Photo Diode Signal at a constant value. Please note that for activating
constant power mode, the Photo Diode Signal reception should be enabled (green round button).
The fields Frequency and Duty Cycle are just indicators and are calculated from the values of
Width and Period.

Laser Diode Driver LD8000
13
Ver. 1.0
Temperature card
Figure 10. Temperature card
This card is devided into three equal parts, one for each of the built-in temperature controllers.
You can activate or deactivate the controller with the ON/OFF button.
Max. Peltier Voltage is to limit the controller output, not to damage the connected TEC module
(Thermo Electric Cooler, Peltier Element). Please refer to the datasheet of the present TEC
module for this value.
The Target temperature is set on the right side of the thermometer symbol. On the left side you
have to specify the Upper and Lower Limits. Within this window the laser operation is
ensured. When the temperature exceeds this limits, the laser and the corresponding temperature
controller are turned off automatically. Please normalize the temperature or readjust the limiting
values before turning the laser and the temperature controller on again.
PID Controllers Card
Figure 11. PID Controllers card
For fine-tuning of the temperature controller settling speed, the PID parameters can be adjusted.
The parameters are labeled as Factors, this means that they do not have units. The values of the
factors range from 0 to 255. There is no equation to find optimal values, they depend on much
physical parameters and should be found intuitively.

Laser Diode Driver LD8000
14
Ver. 1.0
Monitor card
Figure 12. Monitor card
The monitor card shows the values, for which monitoring has been activated (round switch
adjacent to the indicator is lime-green) graphically. Please note, that temperature values use the
scale on the left side, current and voltages use the one on the right side of the graph by default.
At the upper right corner you can set up display options such as line style and color for each
value individually. Just click on the line pictogramm and choose the parameter you want to
adjust.
You can clear the display to start a new measurement using the Clear button.
With the Save button you can save the graphs to a text file. The values are separated by
semicolon, so a common spreadsheet program can be used to work with the data later.

Laser Diode Driver LD8000
15
Ver. 1.0
t
T
B
IN
I V
4.3 Laser modulation modes
There are six modes to modulate the diode current available (the numbers represent the code for
the RLMM instruction, see chapter 5. Protocol description):
10. Continuous Wave (CW): the Target current will permanently be
driven through the diode.
20. Internal Pulse: the current will change between Base and Target,
following hereby the given pulse Width and pulse Period times.
30. External Analog: the current will be driven by voltage at the
MOD-connector (14, Figure 4), limited by Limit. The amplification
ratio is 2A/V.
40. External Pulse: the current will change between Base and
Target, following the IN-signal at TTL-input connector (16, Figure
4). Low level means Base current, high level means Target current.
50. Periodic Burst: this mode is similar to the internal pulse mode,
but the given Number of pulses is followed by given number of
Suppressed pulses. During suppressed pulses, the current is being
hold on the Base level. The pulses are formed with given width and
periode.
60. Single Burst: in this mode, the device will drive given Number
of current pulses and stop, waiting for a further laser ON signal. That
is: user presses the Laser ON button (7, Figure 3) or the TTL-input
(16, Figure 4) goes high in gate mode (s. below).
Gate Mode
In modes with internal pulse generation (2, 5 and 6), the TTL input
connector (16, Figure 4) can be used to turn the laser on or off. This
behaviour is called gate mode and can be entered using the
corresponding button. Please make sure, that the external pulse
frequency is much lower than the laser pulse frequency.
t
I
T
B
N=4
t
I
T
B
N=4 S=5
t
I V
T
B
IN
t
I
L
t
I
T
t
I
T
B
W
P

Laser Diode Driver LD8000
16
Ver. 1.0
5. Protocol description
The main microcontroller of the LD8000 comunicates using the UART (serial) interface. The
device further has a built in serial to USB converter. The USB driver software implements a
virtual serial interface at the PC side. So it comes out to a pure serial communication. At the
current revision, the transfer parameters are fixed to 76800 baud, no parity, 8 data bits, 1 stop bit.
The LD8000 acts as a slave, i.e. it only answers to requests from a master (PC) and does not send
any data by itself. Every transaction is terminated with the carriage return <CR> character
(ASCII: 13). Every instruction is echoed and responsed with the actual value. So to check a
parameter, only the pure instruction is sent. To set a new value, the instruction followed by the
new value is send and compared with the received answer. Please note, that some instructions are
read-only, i.e. the possibly transmitted value is ignored. Decimal separator is the dot (.). In
binary values, a single character T (true) means ON and an F (false) means OFF.
Examples
Set the laser target current to 1000mA
Master: RLCT1000<CR>
LD8000: RLCT1000<CR> 1000<CR>
Check the laser current
Master: RLCA<CR>
LD8000: RLCA<CR> 1000<CR>
Instructions list
Instruction LCD Text Target Description Type Unit
RLMXN
Invert Gate Laser Invert Gate Signal bool
RLPCA
Photo Curr Laser Photo Current Actual uint16 uA
RLPCT
Photo Curr Laser Photo Current Target uint16 uA
RLPCC
Ph Cur Contr Laser Photo Current Control bool
RLMBN
Burst Pulses Laser Number of Pulses in Burst bool
RLMBS
Suppr Pulses Laser Number of Suppressed Pulses bool
RLTLU
LD Temp Max Laser Upper Temperature Limit float °C
RLTLL
LD Temp Min Laser Lower Temperature Limit float °C
RCTLU
LC Temp Max Crystal Upper Temperature Limit float °C
RCTLL
LC Temp Min Crystal Lower Temperature Limit float °C
RHTLU
LC Temp Min Harmonic Upper Temperature Limit float °C
RHTLL
LC Temp Min Harmonic Lower Temperature Limit float °C
RLTCP
LTC P-Factor Laser PID-Regulator P-Factor uint16
RLTCI
LTC I-Factor Laser PID-Regulator I-Factor uint16
RLTCD
LTC D-Factor Laser PID-Regulator D-Factor uint16
RLTCV
LTC Max Volt Laser Maximal TEC Voltage uint16
RLTCS
LTC SetLevel Laser PID-Regulator Set Level uint16
RCTCP
CTC P-Factor Crystal PID-Regulator P-Factor uint16
RCTCI
CTC I-Factor Crystal PID-Regulator I-Factor uint16
RCTCD
CTC D-Factor Crystal PID-Regulator D-Factor uint16
RCTCV
LTC Max Volt Crystal Maximal TEC Voltage uint16
RCTCS
CTC SetLevel Crystal PID-Regulator Set Level uint16
RHTCP
HTC P-Factor Harmonic PID-Regulator P-Factor uint16
RHTCI
HTC I-Factor Harmonic PID-Regulator I-Factor uint16
RHTCD
HTC D-Factor Harmonic PID-Regulator D-Factor uint16
RHTCV
HTC Max Volt Harmonic Maximal TEC Voltage uint16
RHTCS
HTC SetLevel Harmonic PID-Regulator Set Level uint16

Laser Diode Driver LD8000
17
Ver. 1.0
Instruction LCD Text Target Description Type Unit
RLCL
LD Cur Limit Laser Current Limit uint16 mA
RLCT
LD Current Laser Current Target uint16 mA
RLCA
LD Current Laser Current Actual uint16 mA
RLCB
LD Curr Base Laser Current Base uint16 mA
RLVA
LD Voltage Laser Actual Voltage float V
RLVC
LD Compl Vol Laser Compliance Voltage float V
RLMM
Modulation Laser Modulation Mode uint16
RLMW
Pulse Width Laser Pulse Width (internal) uint32 us
RLMP
Pulse Period Laser Pulse Period (internal) uint32 us
RLTT
LD Temp Laser Temperature Target float °C
RLTA
LD Temp Laser Temperature Actual float °C
RLTC
LD Temp Ctrl Laser Temp. -Controller Enable bool
RCTT
Crystal Temp Crystal Temperature Target float °C
RCTA
Crystal Temp Crystal Temperature Actual float °C
RCTC
Cryst T Ctrl Crystal Temp. -Controller Enable bool
RHTT
HarmGen Temp Harmonic Temperature Target float °C
RHTA
HarmGen Temp Harmonic Temperature Actual float °C
RHTC
HG Temp Ctrl Harmonic Temp. -Controller Enable bool
RGVS
Soft Version General Software Version string
RGVN
Serial No. General Serial Number string
RGLT
Laser OnTime General Diode Life time uint32 min
RLG
Gate Option Laser Gate Option bool
RGD
Set Defaults General Set Defaults bool
RGS
Status Word General Get Status (1=TRUE) string
RGM
Manual Contr General Manual Control Enable bool
RGT
Device Temp General Device Temperature float
RL
Laser Diode Laser Laser On/Off bool

Laser Diode Driver LD8000
18
Ver. 1.0
6. Warranty
Impex HighTech LD8000 is warranted to be free of defects in material and workmanship for 12
month from date of shipment. The warranty shall not cover any damage incurred during
shipping. When the product is received by the customers, the shipping container and its content
should be inspected for any damage incurred during shipping. In order to obtain service under
this warranty, the customer must notify Impex HighTech about the defect before the expiration
of the warranty period and make suitable arrangements for the performance of service. In all
cases the customer will be responsible for properly packing and shipping the product back to
Impex HighTech, with shipping charges prepaid. If the product is not properly packed, it will be
damaged in shipping and the warranty will be avoided.
This warranty shall not apply to any defect, failure, or damage caused by improper use, failure to
observe proper operating procedures per the product specifications (see chapter 2.
Specifications), or improper/inadequate maintenance. Impex HighTech shall not be obligated to
furnish service under this warranty 1) to repair damage resulting from attempts by personnel
(other than Impex HighTech representatives) to repair or service the product; 2) to repair
damage resulting from improper use or connection to incompatible equipment; 3) to repair
damage resulting from operation outside of the operating environmental specifications of the
product; 4) to repair damage resulting from improper packaging of the product in order to return
it to Impex HighTech.
Version 1.0
20. November 2008
IMPEX HighTech GmbH
Hovesaatstr. 6
48432 Rheine
Germany
Phone: [phone]
FAX: [phone]