Manual and Documentation

PRIMES ElectronicCalibratedPowerMonitor

Software V 2.48 - October 2011

EC-PowerMonitor
PowerMonitorSoftware
Version 2.48
Operating Manual

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Table of Contents
1. Laser safety precautions..................................................................................5
2. General Informations.........................................................................................7^t2.1 Operational safety......................................................................................................7^t2. 2 PRIMES - the company.............................................................................................7^t3. Measurement...............................................................................................................9^t3.1 Performing a Power Measurement with the PowerMonitorSoftware..........................9^t3.2 Running an EC-measurement.................................................................................10

4. Setting up and installation of the EC-PowerMonitors..................................12^t4.1. Water supply..........................................................................................................12^t4.2. Electrical connections.............................................................................................13^t4.3 Computer setup.......................................................................................................13
4.3.1 Installing software ....................................................................................................... 13
4.3.2 Starting the software.................................................................................................... 16^t4.4. Communication.......................................................................................................16
4.4.1 Testing of the interface................................................................................................. 16
4.4.2. Communication to the devices.................................................................................... 17
4.4.3 Parallel operation of ElectronicCalibratedPowerMonitor and FocusMonitor................. 18^t4.5. Correct position of the device in relation to the laser..............................................18

5. Operation of the PowerMonitor......................................................................21^t5.1 Front of the device...................................................................................................23

6. Errors during operation..................................................................................27
7. Technical Data .................................................................................................29^t7.1 Accuracy and operation conditions:.........................................................................29^t7.2 Sketch of the EC-PowerMonitor...............................................................................30

8. Options.............................................................................................................32^t8.1 Operation of the EC-PowerMonitor with external display without PC......................32^t8.2 Fiber Adaptor...........................................................................................................33

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1. Laser safety precautions
Note!
The EC-LaserQualityMonitor is designed to run measurements inside or near the beam
path of high power laser beams.
The device itself does not emit any laser radiation. However, laser radiation is guided throughand may be scattered from the device.
Any user must have extensive prior technical training and must possess the basic knowledge
required to perform any kind of measurement or alignment procedure of laser beam sources,
beam guiding equipment or focussing devices in a safe manner.
Use of the PRIMES measuring devices LaserQualityMonitor, BeamScanner, BeamMonitor,
FocusMonitor, PolarizationMonitor, PowerMonitor, PocketMonitor, CompactPowerMonitor,
MicroSpotMonitor or EC-PowerMonitor for any purpose other than the appropriate form ofuse specified by the manufacturer is not permitted, and may cause potentially life threatening
injuries or death. The various types of monitors may not be used in a manner which may
cause a potential risk to personnel.
Personal protection is required when working in areas of uncovered visible/invisible laser
radiation, uncovered laser beam systems, beam guiding systems, or process regions. This
holds true for use of this equipment. During measurement procedures, there is always therisk of laser radiation through direct or reflected emissions. Safety requirements are described in: IEC-60825-1, ANSI Z 136 “Laser Safety Standards” and ANSI Z 136.1 “Safe Use of
Lasers” published by the American National Standards Institute; “Laser Safety Basics”, “LIA
Laser Safety Guide”, “Guide for the Selection of Laser Eye Protection”, and “Laser Safety
Bulletin” published by the Laser Institute of Americay (Tel: 1-407-380-1553) and; “Guide
for the Control of Laser Hazards” from ACGIH, 6500 Glenway Avenue D-5, Cincinnati, OH
45211.
The proper and safe use of any monitoring device inside or nearby the laser beam core
diameter
REQUIRES ALL OF THE FOLLOWING:
competent professional knowledge of the type of laser source present.
competent knowledge and understanding of the measurement device
laser safety goggles adapted to the existing wavelength of the laser in use.
protection to reduce direct laser radiation, back reflection and associatedoptical radiation to a safe level.
Safeguard and or emergency safety mechanisms which allow immediate closingof the laser shutter of any free running or focused beam.
A solid mounting surface for the measurement device itself, to reduce the riskof back reflection and avoid any relative movement of the Monitor in relation
to the laser beam axis (This is also necessary to ensure the highest possible
performance).
Adequate protection procedures and equipment are required in order to comply with national
and international regulations; particularly the accident prevention regulations for use, control,
and alignment of high power laser beams. These are, for example: use of shielding screens,
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Software V 2.48 - October 2011protective laser safety goggles, or beam guiding elements and/or traps which do not containany dangerous materials that can release gases or vapors when heated.
The manufacturer and the suppliers of the monitoring equipment accept no liability for damage or injury of any kind arising from the use of the monitor or associated software. The
purchaser and user agree to hold harmless both manufacturer and suppliers of any liability
for injury to equipment or person, or loss of business revenue, caused directly or indirectly
through use of this equipment.

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2. Introduction
The EC-PowerMonitor is a precision instrument to measure the beam power of different laser
sources in the multi-kilowatt range. The main application is to measure the available powerat the work piece of the CO2- YAG and HP-diode lasers. It can operate with focussed andunfocussed beams with a maximum beam diameter of approx. 35 mm.
The maximum power density should not be higher than: 12 kW/cm² (CO2 laser) and 9
kW/cm² (YAG).
2.1 Operational safety
It is absolutely necessary to consider carefully all safety references – as described in chapter
1 – in order to avoid any endangerment for the operator or indifferent ones. If any characteristics arise during a measurement (fires, smoke or uncontrolled reflected radiation etc.),
the laser must be switched-off immediately.
2. 2 PRIMES - the company
PRIMES is a manufacturer of laser measuring devices. These devices are used to measurelaser beam parameters of high-power CO2, solid-state, and diode lasers. A wide selectionof devices is available for the measurement of:

the laser power
the beam diameter and beam position of the unfocussed beam
the beam diameter and beam position of the focussed beam
the polarization of the laser beam
temporal stability of the laser power
PRIMES does all engineering and production itself to ensure the best quality, excellent
service, and responsiveness to meet our customers’ demands.

Max-Planck-Str. 2 - 64319 Pfungstadt - info@primes.de - www.primes.de

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3. Measurement
3.1 Performing a Power Measurement with the PowerMonitorSoftware
1)
2)

3)

Make sure that cables are connected and power is turned on. Turn on coolingwater and adjust flow rate to 4-12 l/min (with at least 0.8 l/min per kW
laser power).
Align the laser beam to the center of the aperture of the PM/EC-PM. Make
sure that the power density does not exceed 10kW/cm² - a good approximation
is to adjust the distance to the focussing optics in such a way that the beam
diameter on the mirror in the aperture is 16-25 mm.
The beam should be perpendicular to the cover of the device.
After the cooling water has been running for ca. 1-2 min, adjust the zero levelby pressing the corresponding button.

Fig. 1 Graphical user interface

4)

Start the laser and after 25s – 60s read off the measurement results. Duringthat time, the graph is rising marginally due to the system. Thus, the exact value
is calculated after 60sec. For most measurements it is recommended to use
the 10 sec - average value instead of the instantaneous display
Under following water cooling supply conditions, the measurement situationis harder:••

mean conductivity of the water under 60 µS
pressure fluctuations or temperature variations of cooling waterwith 1°C/ min gradient

Should this case occur, increase the averaging to 30sec- 90sec.

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3.2 Running an EC-measurement
1. See No.1 + 3 mentioned above (connect the device, adjust zero level)
2. Start EC-measurement. A message reminds you to switch off the laser

Fig 2 Graphical user interface

When the internal heating cartridge is activated, the electrical power consumed by the
cartridge as well as the heat flow into the absorber is displayed simultaneously. A countdown
is shown until a thermal balance has been reached.
Afterwards, the actual measurement is done within 10 sec. The result of the calorimetermeasurement is shown on the left; the result of the electrical measurement is shown on
the right.
Fix an error
Zero level varies periodicallywith constant flow rate

The compressor of the radiator is switching itself on andoff. Thus, a periodic gradient occurs in the cooling watertemperature.
Increase integration time or connect a water tank ahead
with ca. 30-50 litre.

Flow rate signal varies
periodicallyShows the behaviour of a pump in circuit.

Flow rate signal varies
statistically

Noise in the flow rate signal. Caused by cooling water oflow conductivity (<100 µS)

Noticeable difference
between calorimeter andelectrical value with EC
measurement

Check zero level. Check water conductivity.

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4. Setting up and installation of the EC-PowerMonitors
To make reliable measurements the EC-PowerMonitor has to be set up correctly. The following preparations are necessary:
Water supply
Electrical connection
Computer setup
Laser beam alignment
In the following chapters the setups are described in detail.
4.1. Water supply
The EC-PowerMonitor needs a fl ow rate minimum of 5l/min for a safe reliable operation andwill typically be operated at a flow rate of 5-12 l/min. The flow rate direction indicated on thedevice has to be ensured. The fluctuation of the temperature of the coolant at the entranceof the device should be below 0,5 degree/ minute to ensure the specified accuracy.
Typical flow rates and temperature rises Tab.1

Tab. 1 Table Flow rate / increase of temperature / optical powera linear extrapolation up to 10 kW is allowed

Remarks about installation of the coolant circuit.
The EC-PowerMonitor equipped with contact-free, magnetic inductive flow rate sensor
tolerating particles and fibers of Teflon band in the cooling water. The following has to beensured:1. No bubbles (volume share >2 per cent) in the coolant
2. the conductivity of the cooling water should be >50 μS/cm (with slightly
higher uncertainty of measurement >30 μS/cm)
The components of the EC-PowerMonitor which are in contact with the coolant are madeof copper, brass or stainless steel. Therefore, the user should avoid mixing the coolant
circuit of the EC-PowerMonitor with aluminium components. This may lead to corrosion of
the aluminium because of the different chemical potentials. Please note that the additionof additives like antifreezing compounds in the coolant does change the heat capacity of thecooling water significantly. This causes falsified measurement results.

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4.2. Electrical connections
All PRIMES measuring systems can be operated with our common serial bus. Fig. 3 shows
the connection to the PC via RS232/ 485. Fig.4 shows the connection of the EC-PowerMonitor to a PC via USB.

!

! Do not unplug the cables when the power is on !
! PC and measuring system can only beconnected by the RS232-connector or by USB on the
PRIMES-converter !
After connecting all the cables, the power supply can be switched on. The green power
control light on the backside of the EC-PowerMonitor starts lightning. If the red ERROR lightis lightning, two risks are possible:
1) Cooling water flow rate is at least 4l/ min the orange2) Shutter is closed

Fig. 3 The connection via RS232/ 485

Fig. 4 Connection via USB

4.3 Computer setup
4.3.1 Installing software
To run the EC-PowerMonitor, it is necessary to install thePowerMonitorSoftware. The LaserDiagnoseSoftware (Version 2.7 or later) sustains already the direct operation of
the PowerMonitor.
(See FocusMonitor Manual, chapter 6.2)
4.3.1.1 The EC-PM is connected with a computer for
the first time via USB
Make sure, that the power cord (230 V) is connected andthe power switch is turned on. Now, connect the EC-PMand the computer via USB. The Hardware-Wizards starts
automatically after the connection with the EC-PM.
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Software V 2.48 - October 20111) Activate No, not this time

2. Activate Install from a list or specific location

3) Activate include this location in
the search path, click on Browse andchoose the CD with the driver.

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Software V 2.48 - October 20114) Click on continue anyway5) Click on Finish to complete the installation of the USB-driver.

Once the driver is installed on
this computer, it will automaticallyrecognize the EC-PM whenever it isconnected.
You can confirm that it is installed
properly by looking up the USB
properties in the Control Panel(Control Panel / System / Hardware/ Device Manager / Universal Serial
Bus Controllers). The EC-PM willappear there.

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4.3.2 Starting the software
The software can be started by a double click on the PM.exe icon. After start up, the program
tries to make a connection via serial port or USB. The explicit selection can be done in themenu item Communication-free communication.
Normally, the program runs automatically when the EC-PM is switched on.
4.4. Communication
After the physical connection of the devices – see chapter 3.1, 3.2 and 3.3- the communication between the computer and the measuring device can be checked.

4.4.1 Testing of the interface
By starting the program on the PC, the interface will be tested on the computer.
Possible error messages:
Reason:Communication via bus system
is not possible.

Remedy:- Check the wiring of the devices.
If the system is connected to the bus via a RS232-RS485 converter,
missing power supply could be the reason. Communication is only possible
if the bus is supplied with 24V d.c. voltage.
- Switch the power supply of the device off and on.
Reason:The program can not open
the preset interface.

Remedy:Please check, if there is another program, e.g. fax software, already using the interface. A
serial port can only be used by one program at a time.
Please check, if the program opens the correct port. After starting the program, the usedinterface can be changed in the menu communication/port. All interfaces available for the
program are shown there.

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4.4.2. Communication to the devices
The communication test is done by the PC and the control program. A certain instruction issent to each equipment. If equipment answers as indicated in the following table, communication works error free.

For dispatching an instruction on the PC, the PRIMES program is started and selected in
the menu Communication/Data sending. In the appearing window in the field OF, theaddress of the transmitter is registered; in the field TO, the address of the receiver and in
the text field on the right the instruction has to be registered. By selecting the button sending the instruction is sent. The answer of the equipment appears in the window below.
The following table represents the values which can be registered to the function control
and the correct answers- a complete list is to be found in chapter 4.4:

Equipment
FocusMonitor
BeamMonitor
EC-PowerMonitor

FROM:
64
64
64

TO:
161
144
113

Instruction
qr
qr
qr

AnsweraID FocusMonitor
aID BeamMonitor
ready EC-PowerMonitor

If no message returns from the addressed equipment, then something is not correct withthe device. The following measures can be seized in this case:-

Switch off and restart the 24V voltage power supply.

-

Check the wiring of the equipment. Are all plugs connected and bolted?

-

A device blocks the PRIMES-bus. If necessary, disconnect the incorrect device
from the bus after switching- off the power. But still use the remainder system.

-

The PC blocks the bus. This is recognizable from the fact that the red LED at
the interface’s converter (the RTS-signal - ready to send - is led out here)
shines permanently.

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4.4.3 Parallel operation of ElectronicCalibratedPowerMonitor and FocusMonitor
The FocusMonitor and the EC-PowerMonitor can be driven parallel by the LDS software.
This require to supply both devices by their standard power supply. Additionally a cableconnection between the RS 485 socket of both devices is necessary.
The Power measurement can be activated by clicking on the PM symbol in the header of
the Graphical user interface. A small presentation is available within item Measurement –PowerMeasurement.

If the LaserDiagnoseSoftware and the PowerMonitorSoftware are started simultaneously,
they will both try to access the serial port at the same time, which will fail. Only if they are
assigned to different serial ports (COM1 or COM2) both programs will run in parallel. Assign
the ports using the communication/free communication menu.
Exception: the operation of the EC-PM via USB. In this case, both systems run parallel without selecting a serial port explicitly. The logical address of the EC-PM is 112 or 113. The
user interface is shown in fig. 5.

Fig. 5 The graphical inteface of the EC-PowerMonitor

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4.5. Correct position of the device in relation to the laser
The beam should hit the center of the entrance aperture. Please note, that the beam
diameter, power and power density should not be above the stated limit values given in
the appendix. With strongly divergent radiation, the beam has to be recollimate with anadditional lens. For correct setup, please take note of fig. 3. (Particularly with divergent
radiation behind the focussing optics)

Fig. 6 Setup
Measuring divergent radiation behind focus point. It can be used with collimated beams, also.

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5. Operation of the PowerMonitor
After starting the software, the graphical user-interface of the EC-PM appears (see fig. 7).
If the communication is established, the different measured values are displayed. If there isno communication, press the start/stop button twice. If there is still no communication, checkthe selected serial port (COM1, COM2 or USB) and the cabling and the power supply.
The laser beam power is displayed by the EC-PM. There are two possibilities for presentation:
1.)
2.)

The display of the actual power reading
The temporal development of the laser power

The menu „temporal development” shows in parallel: the mean-value and a maximum-value
from the selected time-interval and also the current measurement reading in combination
with a graphic power versus time. The scaling is automatically adjusted or can be selectedby user. In the display different measured values are displayed:
Flow rate:
Te:		
Td:		
		

Current flow rate of the cooling water in liters per minuteTemperature of the entering cooling water
Temperature difference between the outgoing andincoming water temperature.

Fig. 7 The graphical user-interface of PowerMonitor during measurement

The menu item file/settings is used to determine the temporal interval between single
measurements and the selection of a measuring device via the logical address at the bus.
In the case of just one connected device, mostly 113 is used.

Starting measurements
Press the START Button to begin a power measurement. After 15-20 seconds of irradiation,
the final value will be shown in the display.

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Analogue Output Signal
The EC-PowerMonitor generates a voltage signal which is proportional to the laser power.
1 V corresponds to 1 kW laser power. Use a high-impedance voltmeter input to measure
the voltage.
Internal display
The internal display shows laser power, flow rate and temperature difference.
External display (optional)
By option also an external display is available. The display is driven by a standard PRIMESbus and enables a power measurement without a PC.
ProtocolAll the measured values, laser power, flow rate, temperature difference etc. can be monitoredby the item File/Protocol. All the data will be written to a tab- separated text file.
Technical principle
The EC-PowerMonitor measures the laser power by a calorimetric principle. That means,the whole incident laser power is absorbed within the device by a water cooled absorber.
The absorbed power is determinated by measuring the flow rate and the temperature riseof the water.

P = m ⋅ C ⋅ ∆T
To achieve the specified accuracy, it is necessary to use either tap water or mildly deionizedwater for cooling. It is not possible to use water with a large amount additives like antifreeze,because the heat capacity of the water would be modified. As a result, the EC-PowerMonitor
would show false readings.
During the measurement, the temperature of the incoming cooling water is not absolutely
constant. Due to the transition time of the cooling water through the EC-PM temperature
between the incoming and outcoming cooling water is different. As a result, “positive” and“negative” beam power is calculated. This is only an effect of the measuring principle because
no laser beam hits the absorber. To keep this zero point movement low, it is necessary thatthe temperature of the incoming cooling water changes less than 0.5 K/min or less 0.05 K
within 5 seconds. In this case, the zero point should be stable within less than ±50 Watt.

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5.1 Front of the device

Fig. 5. Front of the device

1. Display
Display of the current values
1.
Line: Laser power2.
Line: Flow rate in liters per minute [l/min]3.
Line: Water temperature in degree Celsius [C°]4.
Line: Temperature difference water out/in
2. Shutter Interlock
Free potential shutter to avoid any damage to the PM. Included in delivery: three wire cable:brown-blue -> ready,brown-black-> error (see 5)
3. USB Interface 2.0
Communication with the connected PC. The PM, however, needs an additional 110/220V
power supply (see 8).
The electronics can be supplied via analog out (see 9) or via PRIMES-bus (see 13) as well,
but then the EC- functions can not be used anymore.
4. Power-LED
This LED (yellow) shows that the mainboard is supplied with power and the processor is
running properly.
5. Water-Error-LED
This LED (red) shows errors. Possible errors are:•Flow rate is smaller than 4 l/min•
Shutter is not opened completely•
The measured data is more than 10kW
In case of an error, the red LED is on, and the Shutter Interlock switches to “Error”.
6. Cleaning Air-Switch
Working in dusty environment, you can puff the mirror of the PM clean before measurements,
provided that clean and oil-free compressed air is connected (see 12).
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7. Power Switch
If a power cord is connected to the PowerMonitor, you can switch it off using the Power
Switch. If the power is supplied via PRIMES-bus or analog-out, display and electronics arestill operating but the EC-function cannot be used anymore.
8. Power Plug
The device needs a supply voltage between 100 V and 250 V. A power supply connectedto the grid is necessary for an electrical calibration. Therefore, instead of a laser, electrical
power is used to heat the water flowing through the absorber. This electrical power can be
determined with high accuracy. Moreover, this power can be compared to power determinedby the calorimeter. The electrical power depends on the applied voltage. With 100 V theelectrical power is 850 W, but with 250 V, 3500 W power can be achieved.
Due to this high connection power, the used socket has to be secured with 16A. Additionally, no other devices should be connected to this electric circuit. The provided power cablemust be used and it is not allowed to connect extension cables unless these have a highwire diameter.
9. Water in
The device requires water cooling for the dissipation of laser power. The flow rate should
be more than 4 l/min. Due to specification of the flow rate sensor in the PowerMonitor, thecooling water must have a minimum conductivity of 50 µS. Connecting thread is 3/8 inch,straight inside thread.
10. Analog out
The analog interface provides an output voltage proportional to the measured power. The
proportionality factor is 1 V / kW. Furthermore, the PM can be powered via the analog interface (no EC-function). The connection is done via a provided cable:••••

Black – analog groundBlue – analog out
White – ground power supply
Brown – power supply 24 V

11. Water out
The outflow of the cooling water with the same screw thread as the inflow (3/8 inch straightthread).
12. Compressed Air
Compressed air thread to clean the mirrors and for pneumatic operation of the shutter top.
If connected to oil-free pressurized air, the shutter can be remote-controlled via the PC.
13. PRIMES-Bus
The PRIMES-bus is to be used in connection with a FocusMonitor.
It is used for communication with the connected PC via RS485 / RS232 interface. An interfaceconverter is to be used for the conversion from RS485 (24 V differential signal enables theuse of long cables) to RS232 (5V, not differential). This converter is included in the deliveryof the FocusMonitor.
The PRIMES-bus enables the connection of several PRIMES measurement devices. The
power supply of the EC-PowerMonitor is bi-directional. That means that the EC-PM is able
to energize other PRIMES devices, too. Or the EC-PM can be supplied by a power supplyof an other PRIMES measuring device. This does not apply to the FocusMonitor as it has
high current requirements.

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Corresponding power supplies are included in the delivery of the PRIMES devices for beam
analyzing (FocusMonitor, BeamMonitor, BeamScanner). The EC-PM is provided without anexternal power supply as it has a built-in 100-250 V adapter.
Please note:
NEVER connect the PRIMES-Bus cable to the computer directly (e.g. to COM1). The
supply voltage of 24 V is going to damage the computer port. Even the whole computer can be damaged! ALWAYS connect the RS232 side of the converter with thecomputer!

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6. Errors during operation
At the bottom of the graphical user interface of the EC-PowerMonitor (see fig. 2) some ofthe possible errors in operation are displayed if necessary. The messages are displayed in
red color. All the errors have to be eliminated before starting any measurement.
For example:
WARNING:
Flow rate too low -> control and if necessary increase of the flow rate
Cserial no Echo-> Check the connection of the cables, open the port
If the error messages do not disappear, the port has to be closed and reopened (in the menu
Cummunication) or the program has to be terminated and started again.

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7. Technical Data
7.1 Accuracy and operation conditions:Power range:				
500 W up to 10 kW
Max. power density:			
12 kW/cm²
Reproducibility: 				± 1%
Absolute accuracy:			± 2%
Time constant:				
15 seconds up to 99 % of the final value
Flow rate:				min. 5 litre per minuteFree aperture:				48 mm
Dimensions (height x depth x length)
250 mm x 242 mm x 400 mm
Power supply: 				24 V RS485 just for power measurement						240 V for self-function
Weight:					16 kg

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7.2 Drawing of EC-PowerMonitor

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8. Options
8.1 Operation of the EC-PowerMonitor with external display, without PC
At buyer’s option, there is a control panel display available for the operation of the system.
To run the system, please connect the display and the EC-PowerMonitor with the 9-pin cablefor the PRIMES bus/RS485.
Then, connect the 24 V power supply to the external display. You can use the 9-pin-d-submin RS 485/Primes bus or the direct connection at the back of the housing.
Pin configuration:
Pin 1 and 6		
Pin 2 and 7		
Pin 3 and 8		
Pin 4, 5 and 9		

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8.2 Fiber Adaptor
The fiber adaptor allows connecting a fiber directly with a PRIMES power meter (PowerMonitor PM48, EC-PowerMonitor, CPM-F). This way, power measurements directly behindthe fiber end/ in front of the focussing optics are possible. As a fiber plug, the types LLK-B,
LLK-D (TRUMPF) and QBH (OptoSkand) can be used.
There are 3 different types of fiber adaptors:
Fiber adaptor PM48 / EC-PM to LLK-B (TRUMPF)
Fiber adaptor PM48 / EC-PM to LLK-D (TRUMPF)
Fiber adaptor PM48 / EC-PM to QBH

article no. 130-006-006
article no. 130-006-007
article no. 130-006-009

Using the Fibor Adaptor
Safety Precautions
When using the fiber adaptor, the same rules apply that must be observed whenever usinga laser (wear safety goggles, use the laser and the fiber according to the instructions of the
manufacturer).
Even though the shielding of stray light was taken into account very carefully during theconstruction of the fiber adaptor, any set-up with this device should be regarded as laser
safety class 4.
Set-up and Operation
The mechanical set-up can be seen in the attached drawing.
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Please make sure, when using a PowerMonitor or an EC-PM, the shutter ofthe power meter needs to be open.
Remove any protective foil (if applicable) or protective lid.
Fasten the fiber adaptor on the power meter with the screws.
Connect the cable with the Shutter-Interlock output of the power meter.
The fiber of the laser will only be activated if enough cooling water is flowing
through the power meter and (if a PM48 or EC-PM is used) the shutter of thepower meter is open.
Remove the protective foil and plug the fiber into the adaptor.

Whenever the fiber is plugged: proceed as carefully as possible, to ensure that thesensitive ends of the fiber are never contaminated with dust or fingerprints. This
will destroy the fiber. Please mind the instructions of the manufacturer of the fiber.
Sometimes, dust falling down from the cabling above, can pose a hazard when thecables are moved during the plugging process.
After the Measurement
After the measurement, the fiber adaptor must be sealed with the protective lid to ensurethat no durst can enter the inside.
Handling Protective Windows (only Fiber Adaptor for PM48 / EC-PM)
Generally, the protective windows of the fiber adaptor must be handled like any other protective window, e.g. those in a focussing optics. They should be touched only at the veryedge, and they must be kept free of dust and fingerprints. Before a measurement is done,
they must be checked for contaminations, to make sure that these contaminations are notburned into the surface.

Ref 11/001

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Manual and Documentation

PRIMES ElectronicCalibratedPowerMonitor

Software V 2.48 - October 2011For light contaminations with dust, it can be sufficient to remove the dust with a stream ofoil-free pressurized air (while the fiber end is exposed, pressurized air must not be used, as
dust could be blown onto the fiber!).
In the case of stronger contamination:
Optics paper and acetone can be used for cleaning purposes. Remove the protective window
from the fiber adaptor (3 screws) and place it onto an optics paper. Place a second optics
paper on top of the protective window. Apply ca. 3-4 drops of acetone to the upper optics
paper. Thus, the protective window is wetted. Pull the upper optics paper to the side, so no
drying-spots can remain. Turn the protective window around, and clean the other surface inthe same way. If you see any drying-spots, you should repeat the procedure.
If the protective window shows burn-ins, it must be replaced with a new one.
Error Message
Message from laser software ‚fiber defect / broken’Check whether the cable is connected with the Shutter-Interlock plug of thepower meter. Verify that enough cooling water (4-12 l/min) is supplied.

The shutter (PM48 and EC-PM) must be open.

Ref 11/001

34