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8
Connect cooling circuit
DANGER
Fire hazard; Damage/Destruction of the device 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 device or set it on fire.
X Operate the device with a connected water cooling only and a sufficient water flow rate (see
chapter 8.5 on page 22).
X Connect the laser control's safety interlock with the device. The safety interlock is only re-
leased if there is a minimum of cooling.
8.1
Water quality
NOTICE
Damage/Destruction of the device due to different chemical potentials
The parts of the device which get in contact with cooling water consist of copper, brass or
stainless steel. Connecting the unit to a colling curcuit containing aluminum components
may cause corrosion of the aluminum due to the different chemical potentials.
X Do not connect the device on a cooling circuit in which aluminum components are installed.
•
The device can be operated with tap water as well as demineralized water.
•
Do not operate the device on a cooling circuit containing additives such as anti-freeze.
•
Do not operate the device on a cooling circuit in which aluminum components are installed. Especially when
it comes to the operation with high powers and power densities, it may otherwise lead to corrosion in the
cooling circuit. In the long term, this reduces the efficiency of the cooling circuit.
•
Should the cooling fail, the device can withstand the laser radiation for a few seconds. In this case, please
check the device as well as the water connections for damages.
•
Large dirt particles or teflon tape may block internal cooling circuits. Therefore, please thoroughly rinse the
system before connecting it.
An operation with strongly deionized water (DI-water, conductivity < 30 µS/cm) is only possible with
the respective connection parts – we would be glad to advise you as necessary.
8.2
Water pressure
Normally, 2 bar primary pressure according to Tab. 8.1 on page 20 at the entrance of the absorber are
sufficient (in case of an unpressurized outflow).
Device type
CPM C-9, CPM F-1
CPM F-10, CPM F-20, CPM F-30
Tab. 8.1:
Primary pressure
20
Primary pressure
2 bar
3 bar
CompactPowerMonitor CPM
Revision 02/2019 EN
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