Discussion Category:  UV/VIS Spectrophotometers

Persistent lamp problems

Our lab has been using a Pharmacia Biotech Ultrospec 3000 for years now and recently it begun to act up, after ~20 minutes of being turned on (after the 10 minute lamp ignition process), the readings will begin to fluctuate wildly (from negative values to OD >3).

Since the wavelength in the bottom right corner of the screen also turns off at that time we expected this was because the lamp was turning off. If the spectrophotometer is restarted it will continue to provide highly variable readings and an error message will come up to indicate the lamp has failed to turn on.

We've replaced the lamp and the problem persists. Given the readings will change when the lid is opened we doubt it is the sensor. Has anyone had similar experiences and what have you do to recalibrate/fix the ultrospec 3000?

Cheers

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Asked by

KTW
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SaharaSimbaReply by
SaharaSimba
We can help with repairs .... see www.saharasimba.com
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