THORLABS PDA8000-1, Руководство по эксплуатации

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General remarks 25
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© 2012 Thorlabs
4 Service and Maintenance
4.1 General remarks
The PDA8000 modules don’t need any maintenance by the user.
In order to ensure best performance, accuracy and reliable operation, Thorlabs
recommends a
recalibration cycle of 24 months.
4.2 Troubleshooting
In case that one module of your PRO8000 (-4) / PRO800 system shows malfunction
please check the following items:
 Module does not work at all (no display on the mainframe):
 Mainframe PRO8000 (-4) / PRO800 connected properly to the mains?
 Connect the PRO8000 (-4) / PRO800 to the power line, take care of the
right voltage setting of your mainframe.
 Mainframe PRO8000 (-4) / PRO800 turned on?
 Turn on your PRO8000 (-4) / PRO800 with the key mains-switch.
 Control the fuse at the rear panel of the PRO8000 (-4) / PRO800 mainframe.
 If blown up, replace the fuse by the correct type

(refer to your PRO8000 (-4) / PRO800 mainframe operating manual to select
the appropriate fuse)
 The PRO8000 (-4) / PRO800 display works, but not the module:
 Is the module inserted correctly and are all mounting screws tightened?
 Insert the module in the desired slot and tighten all mounting screws
properly.
 You don’t measure the right photo current
 Is the photo diode connected properly?

Check the connecting cable.
 Is the photo diode poled correctly?

If not, change the polarity with the
":PDPOL "
command or in the chan-
nel menu.
 Do you use 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.