THORLABS ITC4000 Series, Руководство по эксплуатации

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ITC4000 Series
1.2 Protection of Laser Diodes
To protect the user and the connected setup, the ITC4000 Series includes the following protect-
ive features:
Key switch
The key switch will shutoff the laser output. This feature complies with the CDRH (Center for
Devices and Radiological Health) requirements and prevents an unauthorized usage of the
laser driver.
Switch on delay
The ITC4000 controllers are CDRH compliant with the user programmable switch on delay. The
default setting is 3 seconds.
Softstart
The softstart function protects the laser diode against undesired peaks.
Laser current limit (hardware limit)
The maximum laser current can be adjusted by the laser current limit. The threshold can be set
in the LD Source Setup menu (Please refer to section
Setting the LD source parameters ).
Interlock
The interlock input provides several protection functions simultaneously:
·
Safety lock to prevent unintentional use
·
Cable damage monitoring
·
An external emergency switch may be connected
·
To connect your external automatic protection equipment, e.g. for temperature monitoring
·
Laser ON/OFF LED
(Please refer to section Connecting the interlock and LD ON monitoring )
The laser can only be operated with the interlock input being closed.
Open circuit detection for the laser diode
If the connection to the laser is interrupted even for a short time during operation, an immediate
emergency switch off occurs. The open circuit threshold can be set via the "Voltage Protection"
feature (Please refer to section
Laser Output Configuration )
Electronic short-circuit switch for the laser diode
With the current module switched off, an electronic switch will short the laser diode so that no
voltage is applied to the laser contacts.
Control LED for laser current ON
When the laser current is switched on, a green LED indicator in the LD ON switch lights up.
Temperature window protection of the laser diode
A laser operation in a specified temperature range can be realized in combination with the tem-
perature protection function of the integrated TEC controller (Refer to sections
Temperature
protection and Laser output configuration ). The laser output is switched off, if the temper-
ature leaves the defined temperature window.
Overtemperature protection
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