| Date | Action taken | comments |
|---|
| 08/05/08 | Changed the 2H amplifier with the new one KD | Did power measurement and cortab of the 2H amplifier and also the pulse calibration. 2H : 126.25 @ -2.5 |
06/04/08
| Power Measurements (Uncorrected Values) KD | *At Amp (Uncorrected)*
2H : 6dB 26.6W 3dB 51.9W 0dB 106W -3dB 209W -6dB 416.0W
*At Probe (Uncorrected)*
2H : 6dB 6.27W 3dB 12.4W 0dB 25.2W -3dB 49.9W -6dB 107.0W |
| 08/03/08 | The 2H amplifier died KD | The BMPC tripped and as a result Console powered off which resulted in the cryoprobe to be warm up. |
6/25/08
| Cryoprobe re-installed and spec'ed out
| TXI cryoprobe re-insalled after being repaired for alignment fingers and vacuum leak. Lineshape (0.8/4.5/8), S/N Ethyl Benzene (5870:1 2ppm; 6800:1 200Hz), WS (844:1, 20%, 38/145). |
| 01/14/08 | Conventional Probe Specs | Lineshape (9.8/15.9/0.80) Could be better given more time, S/N Ethyl Benzene (1529:1 2ppm; 1648:1 200Hz), WS (299:1, 29%, 39/82) New refmaps. Line shape shim files copied to A_REFSHIM_CONV and to all users. |
| 12/26/07 | Calibrated the hard 90 pulse for X channel KD | For 13C with 8db attenuator : 13.8 @ -6dB; 26.6 @ 0.0dB; 55.2 @ 6 db. For 15N (with 3dB in line attenuation 41.0 @ -6dB; 78.0 @ 0.0dB and 156.0 @ 6.0dB. |
| 12/04/07 | Spec'out after sample tube broke in the cryoprobe KD | Lineshape (7.2/12.8/0.61), S/N Ethyl Benzene (5747:1 2ppm; 7231:1 200Hz; sino xxxx 200Hz), WS (949:1, 27%, 73/261 Sino xxxx:1) Line shape shim files copied to A_REFSHIM and to all users. |
12/5/06
| checked X-nuclei pulse lengths
| No Change in either 13C or 15N pulse lengths.
|
8/8/06
| Spec'ed out BI
| Sample depth set at 17mm. Lineshape 6.8/11.6/0.58, S/N ETB 5268:1/ 6790:1 200Hz noise, Sucrose 32% resolution, 940:1 S/N, Hump 52/161.
|
| 3/16/06 | Spec'ed out SB | Sample depth set at 17.5 mm. Lineshape 7.0/12.4/0.77, S/N ETB 5572:1/6544:1 200Hz test, Sucrose (SS) 28%/877:1 (S/N)/Hump 118/275. Sucrose (shigemi) 26%/853:1 (S/N)/Hump 97/169 |
| 2/27/06 | emailed Bruker that 2H BLAX300 has failed. | After checking that the RF wiring was correct, we finally determined that we were getting the correct voltage for the 2H pulse into the BLAX300, but that there was no output from the amp. Bruker is sending another BLAX300. |
| 2/24/06 | emailed Bruker to report problem with 2H pulse. | A user was attempting to check the alignement of a sample with direct 2H observe and did not see any signal. When we check we were not getting any 2H pulse out of the amplifier. Further investigation found sevral things, see email to Bruker. |
| 1/8/06 | Kaushik came in to check on the system | Guard call saying that he observed the amber light was on.. At 9:51am the flow rate dropped to 89 ml/hour and be 10:00am it was back to normal. Last I spoke with Bill Barch at Bruker he wanted to try a new filter just befor the flow meter...I will check with him to see what the status of this filter is. |
| 12/24/05 | Kaushik came in to respond to BMPC call | At 6:35am the HE flow rate dropped to 74 ml/hour....By 6:55am it had returned to normal....We have emailed this issue to Bruker. |
| 12/14/05 | spec'ed out instrument | 13C and 15N pulsewidth changed slightly from what they were a month ago. 13C changed from 12.9 to 13.9 us and 15N changed from 39 to 40.5/41us. Prosol table was updated accordingly. It is recommended that the amplifier inputs and outputs be checked at next available time. |
| 11/5/05 | BLAX amplifier broken, replaced, recortab'd. |
| 06/10/05 | new 2H amplifier was installed, 2H was cortab'd. New power measrts are available in the table below |
| 05/05/05 | Shibani and Boris ran full base measurements for the console - low and high power | 15N: amplifier output is somewhat low, amplifier input is somewhat low, 2H amplifier output is very low |
| 5/3/05 | Checked the power output for Nitrogen Amplifer | Boris did this. Found out that there are some problem with ROUTER or the AMPLIFIER |
| 5/3/05 | N15 AMPLIFIER is not liner bewteen -6 to 3db; The power output of SGU3-AMP5 at 15N frequency is currently 375W instead of 420W measured last time. It is unclear whether the amplifier or one of the routers are misbehaving. Boris thinks that the power output at the N15 Amplifier is a bit more than the last CORTAB. This is also reflected by the non-linerity of the PW |
| 4/28/05 | The cortab file for conv. probe#60 was not put at the time of probe change from Cryo to conv. There was no carbon signals because of this. |
| 4/28/05 | Moved the present cortab dir to cortab.cryo.042805 and Copied the cortab.conv.03XX05 to cortab | fixed the above problem |
| 4/28/05 | Did hard pulse re-calibration for Carbon and Nitrogen. Also tested the power out put at the probe. | Last power measurements were done on Jan 7, 2005. |
| 4/28/05 | ???? | Nitrogen tune is at its MAX in one direction THERE IS A MATCHING PROBLEM: if you match then you end up detuned OR if you want to tune you end up with NOT MATCH |
| 4/28/05 | New power measurements were done only for Carbon Amplifier | Amplifier 1 is pretty linear!!!!! |
| 1/7/05 | 800 CONV POWER MEASUREMENTS |
