Primes PMC-BEO User manual

PowerMeasuringCassette PMC
PMC-BEO, PMC-YW, PMC-ALO
Revision 01/2019 EN
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Operating Manual
Translation of the original instructions

IMPORTANT!
READ CAREFULLY BEFORE USE.
KEEP FOR FUTURE USE.

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Table of contents
1 Basic safety instructions 7
2 Symbol explanation 9
3 Conditions at the installation site 10
4 Special instructions for measuring devices with rechargeable
lithium ion batteries 10
5 System description 11
5.1 Measuring principles ............................................................................ 11
6 Transportation 11
7 Installation/Removal (Laser processing head) 12
7.1 Installation into the laser processing head ............................................ 12
7.2 Mounting position ................................................................................ 12
7.3 Removal from the laser processing head.............................................. 13
8 Installation/Removal („Stand-alone“ device) 14
8.1 Prepare installation............................................................................... 14
8.2 Mounting position ................................................................................ 14
8.3 Install the PMC .................................................................................... 16
8.4 Remove the PMC ................................................................................ 16
9 Connections 17
9.1 Safety interlock .................................................................................... 17
9.2 Micro-USB socket ............................................................................... 18
10 Control elements 19
10.1 On/Off button....................................................................................... 19
11 Display 19
11.1 Status messages ................................................................................. 20
11.2 Warning message ................................................................................ 20
11.3 Capacity of rechargeable lithium ion battery ......................................... 20

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12 Measuring and displaying with the PMC 21
12.1 Safety instructions................................................................................ 21
12.2 Laser parameter setting ....................................................................... 23
12.2.1 Setting the laser rise time ....................................................... 23
12.2.2 Minimum energy per single measurement............................... 24
12.3 Single measurement ............................................................................ 25
12.4 Serial measurement ............................................................................. 26
12.5 Measurement with pulsed lasers .......................................................... 27
12.6 Read measuring values........................................................................ 27
13 Measurement and evaluation via software 28
13.1 Measurement and evaluation with the LaserDiagnosticsSoftware LDS . 28
13.2 Functions and settings via the software................................................ 28
14 Maintenance and service 29
14.1 Exchanging the protective window....................................................... 29
14.1.1 Safety instructions.................................................................. 30
14.1.2 Exchanging the protective window on the PMC-BEO ............. 32
14.1.3 Exchanging the protective window on the PMC-YW............... 33
14.1.4 Exchanging the protective window on the PMC-ALO ............. 34
15 Measures for the product disposal 35
16 Technical Data 36
16.1 PMC-BEO with standard or advanced absorber .................................. 36
16.2 PMC-YW/PMC-ALO with standard absorber ....................................... 38
17 Dimensions 40
17.1 PMC-BEO............................................................................................ 40
17.2 PMC-YW ............................................................................................. 41
17.3 PMC-ALO............................................................................................ 41
18 Declaration of conformity 42

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19 Appendix 43
19.1 Max. laser power depending on the irradiation time for
devices with standard absorber ........................................................... 43
19.2 Max. laser power depending on the beam diameter for
devices with standard absorber ........................................................... 43
19.3 Max. laser power depending on the irradiation time for
devices with advanced absorber.......................................................... 44
19.4 Max. laser power depending on the beam diameter for
devices with advanced absorber.......................................................... 44

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1 Basic safety instructions
Intended use
The PowerMeasuringCassette PMC is used to measure power of lasers directly in the
laser processing head. Alternatively, the PMC can also be operated outside the laser
processing head as a „Stand-Alone“ device. Please observe and adhere to the speci-
fications and limit values given in chapter16, „Technical Data“, on page36. Other
forms of usage are improper. The information contained in this operating manual must
be strictly observed to ensure proper use of the device.
Using the device for unspecified use is strictly prohibited by the manufacturer. By usage
other than intended the device can be damaged or destroyed. This poses an increased
health hazard up to fatal injuries. When operating the device, it must be ensured that
there are no potential hazards to human health.
The device itself does not emit any laser radiation. During the measurement, how-
ever, the laser beam is guided onto the device which causes reflected radiation (laser
class4). That is why the applying safety regulations are to be observed and necessary
protective measures need to be taken.
In measuring mode, the device’s safety interlock must be connected with the laser
control.
Observing applicable safety regulations
Please observe valid national and international safety regulations as stipulated in ISO/
CEN/TR standards as well as in the IEC-60825-1 regulation, in ANSIZ136 “Laser
Safety Standards” and ANSIZ136.1 “Safe Use of Lasers”, published by the American
National Standards Institute, and additional publications, such as the “Laser Safety
Basics”, the “LIALaser Safety Guide”, the “Guide for the Selection of Laser Eye Protec-
tion” and the “Laser Safety Bulletin”, published by the Laser Institute of America, as well
as the “Guide of Control of Laser Hazards” by ACGIH.
Taking necessary safety measures
If there are people present within the danger zone of visible or invisible laser radiation,
for example near laser systems that are only partly covered, open beam guidance sys-
tems or laser processing areas, the following safety measures need to be taken:
• Connect the device’s safety interlock to the laser control. Check that the safety
interlock will switch off the laser properly in case of error.

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• Please wear safety goggles adapted to the power, power density, laser wave
length and operating mode of the laser beam source in use.
• Depending on the laser source, it may be necessary to wear suitable protective
clothing or protective gloves.
• Please protect yourself from direct laser radiation, scattered radiation as well as
from beams generated from laser radiation (e.g. by using appropriate shielding
walls or by weakening the radiation to a harmless level).
• Please use beam guidance- or beam absorber elements which do not emit any
hazardous particles as soon as they get in contact with laser radiation and which
resist the beam sufficiently.
• Please install safety switches and/or emergency safety mechanisms which enable
an immediate closure of the laser shutter.
• Please ensure a stable mounting of the device in order to prevent a relative motion
of the device to the beam axis of the laser and thus to reduce the risk of stray
radiation.
Employing qualified personnel
The device may only be operated by qualified personnel. The qualified personnel must
have been instructed in the installation and operation of the device and must have a
basic understanding of working with high-power lasers, beam guiding systems and
focusing units.
Conversions, modifications and repairs
The device must not be modified, neither constructionally nor safety-related, without
our explicit permission. The device must not be opened e.g. to carry out unauthorized
repairs. Modifications of any kind will result in the exclusion of our liability for resulting
damages.
Liability disclaimer
The manufacturer and the distributor of the measuring devices do not claim liability
for damages or injuries of any kind resulting from an improper use or handling of the
devices or the associated software. Neither the manufacturer nor the distributor can be
held liable by the buyer or the user for damages to people, material or financial losses
due to a direct or indirect use of the measuring devices.

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2 Symbol explanation
The following symbols and signal words indicate possible residual risks:
DANGER
means that death or serious physical injuries will occur if necessary safety
precautions are not taken.
WARNING
means that death or serious physical injuries can occur if necessary safety
precautions are not taken.
CAUTION
means that a slight physical injury can occur if necessary safety precautions
are not taken.
NOTICE
means that property damages can occur if necessary safety precautions are
not taken.
The device itself or the packing bears the following symbols to indicate require-
ments and possible dangers:
Read and observe the operating instructions and safety guidelines before the
start-up!

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Further symbols that are not safety-related:
Here you can find useful information and helpful hints.
With the CE marking the manufacturer guarantees that his product is in confor-
mity with the EC guidelines.
Call for observing (visual feedback from the device or the software).
X Call for action
3 Conditions at the installation site
The device must only be operated in a dry and dust free atmosphere. High levels of
humidity can lead to condensation, which can affect the operation of the device. This
also applies to high environmental dust exposure.
In industrial environments erroneous measurements may be triggered by strong elec-
tromagnetic fields. In this case we recommend EMC compliant shielding of the safety
interlock cable.
4 Special instructions for measuring devices with recharge-
able lithium ion batteries
The device is equipped with a lithium-ion battery. Note that this battery may ignite or
explode at high temperatures.
To operate the device, the ambient conditions must therefore be observed and adhered
to in accordance with the specifications in chapter16, „Technical Data“, on page36.
The lithium-ion battery is permanently installed in the device. Do not open the device
to replace the lithium-ion battery, as damage to the battery may result in the escape of
harmful substances.

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5 System description
Protective window
Protective window
holder
Display
On/Off button
Safety interlock
connection
Locking latch
Fig. 5.1: System description of the PMC
5.1 Measuring principles
The absorber of the calorimetric measurement system is irradiated by a laser for a short
period of time. The temperature difference of the absorber between start and finish
of the laser pulse is measured. From the increase in temperature, the microprocessor
based electronics is able to calculate laser power to a high degree of accuracy.
6 Transportation
NOTICE
Damaging/Destruction of the device
Hard impacts or dropping the device can damage the optical and electri-
cal components.
X Only transport the device in its original packaging.

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7 Installation/Removal (Laser processing head)
7.1 Installation into the laser processing head
1. Turn off the laser source.
2. Ensure that moving parts, e.g. robot arms, etc. are at a standstill and that they
cannot be set in motion unintentionally.
3. Remove the protective glass cassette (part of the laser system) from the laser
processing head.
• Protect the protective glass of the protective glass cassette from contamination.
NOTICE
Damage to the laser system
Contamination and fingerprints on the protective window can lead to
damage or shattering or splintering of the protective window during mea-
suring operation. Parts of the protective window can get into the laser
system and damage it.
X Do not touch the protective window.
X Only operate the device with a clean protective window.
4. Remove the protective foil from the protective window of the device.
5. Insert the device into the slot of the laser processing head until the locking latch
locks in place (see Fig. 5.1 on page11).
6. Ensure a secure fit of the device in the laser processing head:
• The device must be fully seated until the locking latch engages in the laser pro-
cessing head.
7. Connect the safety interlock connection cable.
7.2 Mounting position
Insert the PMC into the laser processing head so that the laser beam hits the protective
window.

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7.3 Removal from the laser processing head
DANGER
Serious eye or skin injury due to laser radiation
If the device is pulled out of the laser processing head during the mea-
surement, scattered or directed reflection of the laser beam will occur.
X First turn the laser source off and then remove the device from the laser
processing head.
1. Turn off the laser source.
2. Ensure that moving parts, e.g. robot arms, etc. are at a standstill and that they
cannot be set in motion unintentionally.
3. Remove the safety interlock connection cable, press the locking latch (see Fig. 5.1
on page11) and remove the device from the laser processing head.
4. Apply the protective foil to prevent contamination of the protective window.
5. Insert the protective glass cassette (part of the laser system) back into the laser
processing head.

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8 Installation/Removal („Stand-alone“ device)
8.1 Prepare installation
1. Turn off the laser source.
2. Ensure that moving parts, e.g. robot arms, etc. are at a standstill and that they
cannot be set in motion unintentionally.
DANGER
Serious eye or skin injury due to laser radiation
If the stability of the device is not guaranteed or the inlet aperture is not
centered and mounted perpendicular to the laser beam, increased scat-
tered or directed reflection of the laser beam will occur.
X Align the device as described in chapter 8.2 on page14.
X Install the device according to chapter 8.3 on page16 in a way that
ensures, that the PMC can not shift or fall.
CAUTION
Cutting hazard
Contamination and fingerprints on the protective window can lead to
damage or shattering or splintering of the protective window during mea-
suring operation.
X Do not touch the protective window.
X Only operate the device with a clean protective window.
8.2 Mounting position
When installed as „Stand-Alone“ device the PMC can be mounted vertically or hori-
zontally. The PMC must be aligned to the laser beam. The laser beam must hit the inlet
aperture in the middle and perpendicular. Please mind and adhere to the specifications
and limit values given in chapter16, „Technical Data“, on page36.

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Normally, the PMC is positioned underneath the focus position of the beam path for
power measurement (divergent laser radiation). If this is not possible, the PMC can be
positioned above the focus. Please note, that in this case the laser radiation is conver-
gent and the permissible power density on the absorber (approx. 2 mm underneath the
protective window) must not be exceeded.
Inlet aperture
center point
Focal width fApprox. focal width f
Focusing optics
Focusing plane
max. 30mm
(max. power density 1.5kW/cm²)
PowerMeasuringCassette PMC
Fig. 8.1: Alignment to the laser beam (example for an BEO optics with an inlet apertureØ=50mm)

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8.3 Install the PMC
1. Align the device with the laser beam as described in chapter 8.2 on page14
and Fig. 8.1 on page15.
The distance between the entrance inlet aperture center point and the mount-
ing threads M3 as well as the spacing of the mounting threads M3 from one
another are the same for all PMC variants.
2. Install the device with the mounting threads M3 at the bottom of the device (see
Fig. 8.2 on page16).
• Observe the maximum screw-in depth of 5mm.
3. Ensure a stable installation of the device:
• The device must not be able to move.
4. Connect the safety interlock connection cable.
5. Remove the protective foil from the protective window of the device.
2 x M3
max. screw-in depth 5mm
Inlet aperture
center point
Fig. 8.2: Mounting threads, bottom view
8.4 Remove the PMC
1. Turn off the laser source.
2. Ensure that moving parts, e.g. robot arms, etc. are at a standstill and that they
cannot be set in motion unintentionally.
3. Unscrew 2screws from the 2mounting threads M3 on the underside of the de-
vice (see Fig. 8.2 on page16).
4. Remove the safety interlock connection cable and remove the device from the
laser system.
5. Apply the protective foil to prevent contamination of the protective window.

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9 Connections
Micro-USB socket Safety interlock connection
Fig. 9.1: Connections (example PMC-BEO)
9.1 Safety interlock
At temperatures over 100°C, the safety interlock is triggered in order to protect the
absorber from overheating. If the absorber is hotter than 100°C, Pin3 and Pin 4will
connect.
Since the heat is concentrated in the area where the laser beam hits, the safety interlock
may be triggered shortly after the beam comes on, since the temperature of the absorb-
er briefly exceeds 100°C. When the device is used in accordance with the technical
specifications, this brief spike in the temperature of the absorber does not pose a risk to
the absorber and does not constitute an error.
Unfortunately, it is not possible to trigger the safety interlock on a time delay, because
otherwise there would be no way to ensure that it protects against overheating.
Once the absorber cools off, Pin1 and Pin4 of the safety interlock are connected. A
suitable 2m long connection cable is included.

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NOTICE
Damaging/Destruction of the device
If the safety interlock is not connected, the device can be damaged or
destroyed due to overheating.
X When connecting the laser control, please ensure that the laser is turned
off in case of an interruption of the connection.
Pin diagram safety Interlock
plug (view connector side)
Pin Wire color Function
1
4
3
4 Black Mutual pin
1 Brown Connected with pin4 when ready for
operation
3 Blue Connected with pin4, when in safety
interlock mode (absorber too hot)
Tab. 9.1: Pin assignment of the safety interlock plug
9.2 Micro-USB socket
You can charge the rechargeable lithium ion batteries of the measuring device by plug-
ging them into the micro-USB socket on the PC. A suitable cable is included in the
scope of delivery.
When using the optional LaserDiagnosticsSoftware LDS, the device communicates with
the LDS via the micro-USB socket.
You will find the PRIMES USB-driver for all USB-capable devices on the
PRIMES website at: https://www.primes.de/en/support/downloads/software.html.

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10 Control elements
10.1 On/Off button
The on/off button have several functions:
Keystroke Function
5seconds Turn on/Turn off
2seconds Show measuring values
Repeated pushing for 2seconds Turn over measuring value display
Fig. 10.1: On/Off button
11 Display
Laser power in Watt
Absorber temperature
Battery capacity
Status message
Fig. 11.1: Display

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11.1 Status messages
Status Message Meaning
Waiting for laser beam The device is ready for operation, the laser can be turned on.
Check temp. The temperature gradient (change in the absorber temperature/time)
is checked. Please wait until the message disappears. Thereafter, the
device is ready to measure again.
Thermalize The thermalization time allows for a uniform temperature distribution
in the absorber. Afterwards, the temperature is measured.
Finished The measurement is completed.
Tab. 11.1: Status messages
11.2 Warning message
Warning Message Reason
Safety interlock open The absorber temperature has exceeded 100°C. In order to protect
the device, the safety circuit is open.
Tab. 11.2: Warning message
This warning message does not imply an error. The message is automatically
reset as soon as the absorber temperature is below 100°C again. Likewise,
the safety circuit is then closed again.
11.3 Capacity of rechargeable lithium ion battery
The capacity of the rechargeable lithium-ion battery is displayed in percentage. The
accuracy of this display is subject to various factors (such as, for example, the tempera-
ture, the battery condition, etc.). We therefore recommend charging the battery when
20% are displayed. If the battery is fully discharged, the charging can take between 12
and 14hours.
Please note that the charging process can only be carried out in the temperature range
from 0°C to + 45°C to protect the battery. With a battery capacity of 100%, the device
has an operating time of approx. 8hours (equivalent to approx.100measurements).
When using all power saving functions (see Tab. 13.1 on page28) approx. 20hours.