35,0(6Operating Manual
Translation of the original instructions

Absorber C20/100 with water-cooling
NIR or CO2

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Absorber C20/100 with water-cooling

35,0(6IMPORTANT!
READ CAREFULLY BEFORE USE.
KEEP FOR FUTURE USE.

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Table of contents
1

Basic safety instructions

5

2

Symbol explanation

7

3

Conditions at the installation site

8

4Transport

85Install/remove the absorber

9

6

5.1

Install the absorber................................................................................. 9

5.2

Remove the absorber........................................................................... 10

Connect cooling circuit

11

6.1

Water quality......................................................................................... 11

6.2

Water pressure..................................................................................... 12

6.3

Humidity............................................................................................... 12

6.4

Water connections and water flow rate................................................. 13

6.5

Remove the sealing plugs of the water connections.............................. 14

6.6

Connect the water supply..................................................................... 14

7

Operation

15

8

Dimensions

16

9

Technical data

17

10

Storage

18

11

Measures for the product disposal

19

4

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Basic safety instructions

Intended use
The absorber C20/100 is intended for installation and permanent integration into alaser system. The absorber converts the radiation of NIR- or CO2-lasers into heat,
which is then dissipated into the cooling water that is flowing through. Please observe
and adhere to the specifications and limit values given in chapter 9 „Technical data“ onpage 17. Forms of use, other than the intended use described herein, are considered
improper. For the safe use of the absorber, the information in this operating manualmust be adhered to.
Using the absorber for use other than that described in this operating manual is prohibited strictly by the manufacturer. By usage other than intended, the absorber can bedamaged or destroyed. This poses an increased health hazard up to and including fatal
injuries. When operating the absorber, it must be ensured that there are no potential
human health hazards.
The absorber does not ensure complete absorption of the laser radiation. Please keep
in mind that there is a residual reflection (typically 0.5 % to 1 %). Please observe that,even with the use of the absorber, scattered radiation (laser class 4) can arise. Hence,
the applicable safety regulations are to be observed and necessary protective measures
must be taken.
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 Protection” and the “Laser Safety Bulletin”, published by the Laser Institute of America, as wellas 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 systems or laser processing areas, the following safety measures need to be taken:•

Please wear safety goggles adapted to the power, power density, laser wave
length and operating mode of the laser beam source in use.

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•
•

•

•
•

•
•

Absorber C20/100 with water-cooling

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 asfrom beams generated from laser radiation (e.g. by using appropriate shielding
walls).
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 absorber in order to prevent a relative
motion of the absorber to the beam axis of the laser and thus to reduce the risk of
scattered radiation.
The absorber temperature is to be monitored with a temperature sensor.
The cooling water flow rate is to be monitored.

Employing qualified personnel
The absorber may only be operated by qualified personnel. The qualified personnel
must have been instructed in the installation and operation of the absorber and musthave a basic understanding of working with high-power lasers, beam guiding systems
and focusing units.
Conversions, modifications and repairs
The absorber must not be modified, neither constructionally nor safety-related, without
our explicit permission. The absorber 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 absorber do not claim liability for damages or injuries of any kind resulting from an improper use or handling of the absorber.
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 theabsorber.

6

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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.

WARNINGmeans that death or serious physical injuries can occur if necessary safety
precautions are not taken.

CAUTIONmeans that a slight physical injury can occur if necessary safety precautions
are not taken.

NOTICEmeans that property damages can occur if necessary safety precautions are
not taken.
The device itself or the packing bears the following symbols to indicate requirements and possible dangers:
Read and observe the operating instructions and safety guidelines before thestart-up!
Do not reach in

Further symbols that are not safety-related:
With the CE marking the manufacturer guarantees that his product is in conformity with the EC guidelines.
X

Call for action

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Absorber C20/100 with water-cooling

Conditions at the installation site
The absorber must not be operated in a condensing atmosphere.
The ambient air must be free of organic gases.
Protect the absorber from splashes of water and dust.
Operate the absorber in closed rooms only.

4

Transport
NOTICE
Damaging/Destruction of the absorbers
Hard impacts or dropping the absorber can damage the absorber.
Touching the parabolic mirror can lead to burn-in. Burn-in leads to damage to the parabolic mirror and increases the scattered radiation.
X

Do not touch the parabolic mirror in the inlet aperture.

X

Handle the absorber carefully when transporting it.

NOTICE
Damage/destruction of the absorber caused by leaking or freezing cooling water
Leaking cooling water can damage the parabolic mirror of the absorber.
Transporting the absorber at temperatures near or below freezing andwithout emptying the cooling circuit completely can cause damage.

8

X

Empty the lines of the cooling circuit completely using compressed air(max. 3 bar).

X

Close the connector plug of the cooling circuit with the included sealing
plug.

X

To avoid contamination, please cover the inlet aperture with optical tape.

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5

Install/remove the absorber

5.1

Install the absorber

DANGER
Serious eye or skin injury due to laser radiation
If the stability of the absorber is not guaranteed or if the absorber is notinstalled with the inlet aperture towards the laser beam, scattered or
directed reflection of the laser beam will result.

1.
•
2.
3.
•

X

Install the absorber with the inlet aperture facing the laser beam.

X

Install the absorber in a way that ensures, that the absorber can not shiftor fall.

Align the absorber with the inlet aperture towards the laser beam. Observe thespecifications in chapter 9 „Technical data“ on page 17.
Do not touch the parabolic mirror in the entrance aperture.
Install the absorber with four M8 fixing screws in the Ø 8,4 mm through holes.
Ensure a stable installation of the absorber.
The absorber must not be able to move.
500
450

250
150

4x Ø 8,4

Fig. 5.1:

Four through holes Ø 8.4 mm (view from below)

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Absorber C20/100 with water-cooling

Remove the absorber

Even when used as intended, parts of the absorber can become very hot. Temperatures
above 70 °C can be reached.

WARNING
Risk of burns – Hot surface
The absorber is very hot after operation. Touching the hot absorber cancause severe burns.
X

1.
2.
•

10

Allow the absorber to cool for a adequate time before removing it. Make
sure before touching the absorber that it is no longer hot.

After cooling down of the absorber unscrew 4 M8 fixing screws (see Fig. 5.1 on
page 9).
Remove the absorber from the laser system.
Do not touch the parabolic mirror in the entrance aperture.

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Connect cooling circuit
DANGER
Fire hazard; Damage/Destruction of the absorber due to overheating
If there is no water cooling or a water flow rate which is insufficient, there
is a danger of overheating, which can damage the absorber or set it on
fire.
X

6.1

Operate the absorber only with installed water cooling and sufficient flow.

Water quality

NOTICE
Damage/Destruction of the absorber due to different chemical potentials
The parts of the absorber which get in contact with cooling water consistof copper, brass or stainless steel. A connection of the absorber to aluminum pipes can lead to corrosion of the aluminum due to the different
chemical potentials.
X
•
•
•

•

•

Do not connect the absorber with a cooling circuit made of aluminium.

The water-cooled absorber is made of copper and can be operated with tap
water as well as demineralized water.
Do not operate the absorber on a cooling circuit containing additives such as antifreeze.
Do not operate the absorber on a cooling circuit in which aluminum components
are installed. Especially when it comes to the operation with high powers andpower densities, it may otherwise lead to corrosion in the cooling circuit. In thelong term, this reduces the efficiency of the absorber and the cooling circuit.
Should the cooling fail, the absorber can withstand the laser radiation for a few
seconds. In this case, please check the absorber as well as the water connections for damages and replace them if necessary.
Large dirt particles or teflon tape may block internal cooling circuits. Therefore,
please thoroughly rinse the system before connecting it.

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Absorber C20/100 with water-cooling

Water pressure

Normally, 4 bar primary pressure at the entrance of the absorber are sufficient in case ofan unpressurized outflow.

NOTICE
Damage/Destruction of the absorber due to overpressure
X

6.3
•

The maximum permissible water pressure is 6 bar.

Humidity
The absorber must not be operated in a condensing atmosphere. The humidity has to be considered in order to prevent condensates within and outside theabsorber.

NOTICE
Damage/Destruction of the absorber due to condensing water
Condensation water inside of the absorber can lead to damage.
X

12

The temperature of the cooling water must not be lower than the dew
point (see Tab. 6.1 on page 13).

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40

100

35

80
70
60

30

50
25

40

20

30

15

20

10

Relative humidity in %Cooling water temperature in °C

Absorber C20/100 with water-cooling

5
10

0
0

5

10

15

20

25

30

35

40

Air temperature in °C
Tab. 6.1:

Dew point diagram

ExampleAir temperature: 22 °C
Relative humidity: 60 %The cooling water temperature cannot fall below 14 °C.

6.4

Water connections and water flow rate

Connection diameter

Recommended flow rate

Minimum flow rate

PE hoses 16 mm

15 – 30 l/min

8 l/min at 40 % of the max.
laser power

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Absorber C20/100 with water-cooling

Remove the sealing plugs of the water connections
Release ring

1. Push1.

Please push down the release ringof the connection and pull out theplug with your free hand.

2.

Remove the sealing plugs of thewater connections and keep it in asave place.

2. PullFig. 6.1:

6.6

Remove the sealing plugs of the water connections

Connect the water supply

The absorber is equipped with 2 ELSA push-in fittings for hose outer diameters of
16 mm.
1.
2.
3.
•

Connect the 2 ELSA push-in fittings with the on-site water supply (see Fig. 6.2 on
page 14).
Activate the on-site water supply.
Check whether the on-site water cooling is in operation.
The absorber must feel cool to the touch.

Cooling circuit(inlet flow)
Cooling circuit(return flow)

Fig. 6.2:

14

Two ELSA push-in fittings

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Operation
Please observe the safety instructions in chapter 1 „Basic safety instructions“ onpage 5.

DANGER
Serious eye or skin injury due to laser radiation
The absorber does not ensure complete absorption of the laser radiation. Please keep in mind that there is a residual reflection (typically
0,5 % to 1 %).
X

2.

Please observe the safety instructions in chapter 1 „Basic safety instructions“ on page 5.

Please monitor the absorber temperature with a temperature sensor.

DANGER
Fire hazard due to glowing components
In case of longer irradiation without cooling the absorber can overheatand start to glow in connection with temperatures of more than 1 000 °C.
X
3.

Do not keep flammable materials in the environment of the absorber.

Please monitor the flow rate of the cooling water.

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Dimensions
500
450

250
150

4x Ø 8,4

250

ca. 206201

180

All dimensions in mm (general tolerance ISO 2768-v)

16

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Technical data
Specifications
Max. laser power

20 kW

Max. power density

5 kW/cm²

Irradiation time

continuous

Wavelength range

800 – 1 100 nm (NIR) oder 10 600 nm (CO2)

Inlet aperture

100 mmBeam Incidence

Vertically and centrally into the inlet aperture
Maximum incidence angle deviation (divergence) ± 3°
Maximum positioning offset ± 10 mm

The absorber temperature is to be monitored with a temperature sensor.
Water supply
Cooling water pressure

4 bar primary pressure with an unpressurized outflow,
max. 6 bar

Minimum cooling water flow rate

8 l/min at 40 % of the max. laser power

Recommended cooling waterflow rate

15 – 30 l/min

Cooling water temperature Tin1)

Dew point temperatur < Tin < 30 °C

1)Please contact PRIMES in advance in case you intend not to work within this specification.

The cooling water flow rate is to be monitored.
Dimensions and Weight
Dimensions (L x W x H)

500 x 250 x 206 mm

Weight (approx.)

28,6 kg

Connection
Connection for 2 ELSA push-in
fittings

G 1/2 inch internal threads

2 ELSA push-in fittings

Hose outer diameter 16 mm

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Environmental conditions
Operating temperature range

10 – 40 °C

Storage temperature range

5 – 50 °C

Reference temperature

22 °C

Permissible relative humidity(non-condensing)

10 – 80 %10

Storage

Please note before storing:

NOTICE
Damage/destruction of the absorber caused by leaking or freezing cooling water
Leaking cooling water can damage the parabolic mirror of the absorber.
Storing the absorber at temperatures near or below freezing and without
emptying the cooling circuit completely can cause damage.

18

X

Empty the lines of the cooling circuit completely using compressed air(max. 3 bar).

X

Even when the lines of the cooling circuit have been emptied, a small
amount of residual water will remain in the absorber at all times. This mayleak out and damge the parabolic mirror.
Close the connector plug of the cooling circuit with the included sealing
plug.

X

To avoid contamination, please cover the inlet aperture with optical tape.

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Measures for the product disposal

Due to the Electrical and Electronic Equipment Act (“Elektro-G“) PRIMES is obliged todispose PRIMES measuring devices manufactured after August, 2005, free of charge.
PRIMES is a registered manufacturer in the German “Used Appliances Register“(Elektro-Altgeräte-Register “EAR“) with the number
WEEE-Reg.-Nr. DE65549202.
Provided that you are located in the EU, you are welcome to send your PRIMES devices
to the following address where they will be disposed free of charge (this service does
not include shipping costs):
PRIMES GmbH
Max-Planck-Str. 264319 Pfungstadt
Germany

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19PRIMES GmbH
Max-Planck-Str. 264319 Pfungstadt
GermanyTel +49 6157 9878-0
info@primes.dewww.primes.de