Re: [ccp4bb] low UV reading on AKTA prime

2009-07-08 Thread Marius Schmidt
Yes, our new Akta prime has also only 2 mm path length and readings are, therefore, much smaller than with 1 cm path length in a typical spectro-photometer. Best Marius Hi all, We recently got low UV reading on our AKTA prime. We contacted GE healthcare, but was told that the UV reading on

Re: [ccp4bb] low UV reading on AKTA prime

2009-07-07 Thread Leiman Petr
sure the A280 dial is set correctly on the lamp. Please check the manual for guidance. Best, Scott - Original Message - From: Matt Colins matt.colins2...@yahoo.commailto:matt.colins2...@yahoo.com Date: Wednesday, July 1, 2009 4:40 pm Subject: [ccp4bb] low UV reading on AKTA prime

Re: [ccp4bb] low UV reading on AKTA prime

2009-07-02 Thread Lijun Liu
Hi Matt, AKTA system does allow you check the how-good percentage of the UV lamp, so if the UV lamp is new, and it gives low percentage (I do not mean the 20%) then your AKTA system may have the problem like Scott said or other thing in the Optical path. There are other possibilities, however!

[ccp4bb] low UV reading on AKTA prime

2009-07-02 Thread Palm
Hi all, another reason to get low readings from the UV meter can be a drift in the baseline. The photometer is properly calibrated only when you turn it on, I think. Since we have our machine running in the coldroom without (usually) turning it off for month, we have observed wrong 260/280

[ccp4bb] low UV reading on AKTA prime

2009-07-01 Thread Matt Colins
Hi all, We recently got low UV reading on our AKTA prime. We contacted GE healthcare, but was told that the UV reading on AKTA prime should be 20% of the spectrometer reading, because the path length of the flow cell of AKTA prime is only 2 mm (20% of the pathlength of a spectrometer cuvette).

Re: [ccp4bb] low UV reading on AKTA prime

2009-07-01 Thread Scott Walsh
for guidance. Best, Scott - Original Message - From: Matt Colins matt.colins2...@yahoo.com Date: Wednesday, July 1, 2009 4:40 pm Subject: [ccp4bb] low UV reading on AKTA prime To: CCP4BB@JISCMAIL.AC.UK Hi all, We recently got low UV reading on our AKTA prime. We contacted GE

Re: [ccp4bb] low UV reading on AKTA prime

2009-07-01 Thread Patrick Loll
the A280 dial is set correctly on the lamp. Please check the manual for guidance. Best, Scott - Original Message - From: Matt Colins matt.colins2...@yahoo.com Date: Wednesday, July 1, 2009 4:40 pm Subject: [ccp4bb] low UV reading on AKTA prime To: CCP4BB@JISCMAIL.AC.UK Hi all, We