Bruker NMR 400 89 Ascend DNP - Page 75

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ZTKS0243 / Z31993 / 03
Technical Data MS 400‘89 Ascend DNP
Fill Volume, Evaporation Rate and Hold Time
Cryogenic Agents Value Unit
Nitrogen vessel total volume 134 l
Nitrogen refill volume 104 l
Nitrogen evaporation rate 270 ml/h
Nitrogen hold time
1
16 days
Helium vessel total volume 101 l
Helium refill volume 82 l
Helium evaporation rate (sweep coil persistent mode) 23 ml/h
Helium hold time
1
(sweep coil persistent mode)
1. Maximum time intervall between two fillings
150 days
Helium refill volume after Quench
(cool down and refill)
150 l
Table A.4: Cryogenic Agents