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ITC8000
u You don’t get the desired laser output power
Ø Is the interlock closed?
§ Verify that the resistance between the interlock pins of the connector jack does not
exceed 430 W. See section Connecting Interlock and Status Display .
Ø Is the desired module selected?
§ Select the desired module on the display by means of the up- and down arrow keys.
(LED “SEL” on the front panel lights up).
Ø Is the laser output turned ON in the main menu or one of the sub menus?
§ Change the status setting from “off” to “on”. The LED “LD ON” on the front panel of the
module must light.
Ø Is the hardware limit ILIM or the software limit IMAX set correctly?
§ Adjust the hardware limit ILIM by means of the potentiometer on the ITC8000 front panel
and the software limit ILIM in the channel menu to appropriate values.
Ø Is the software limit PLIM set to zero?
§ Correct the value in the channel menu to the desired limit.
Ø Is the laser diode installed properly?
§ Control the connection cable.
Ø Is the laser diode poled correctly?
§ If not, change the polarity of the laser diode corresponding to the type of ITC8000
module (AG or CG)
Ø Is the photo diode connected properly?
§ Check the connecting cable.
Ø Is the photo diode poled correctly?
§ If not, change the polarity with the ":PDPOL:SET" command or in the channel menu.
Ø Are you using a bias voltage with the photo diode in photocurrent mode?
§ Turn off bias voltage in the channel menu, with the ":PDBIA OFF" command or
change the polarity of the diode for photo element mode.
Ø Is the correct photo diode efficiency set (A/W)?
§ Enter the coefficient in the channel menu or with the command ":CAL:SET"
Ø Is the desired output power programmed correctly?
§ Adjust the desired output power PLD
in the channel display
Ø Do you use a temperature window with inappropriate setting or is the TEC not switched on?
§ Change settings, switch on TEC, or turn off the window function
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