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谱仪Helium下降速率，以往一般4天下降1 %，但最近不知为何，有时2天就下降1 %。液氮是一周补加一次。请问根据下面的一部分液氦、液氮读数，能判断液氦挥发速率正常吗？如果不正常，大致是什么原因？应该怎么做？
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" f! q: |+ `# R+ y; e$ e6 VFri Sep 13 04:15:00 2013 : helium level = 69 %, nitrogen level = 100 %, field = 8510.1
; }0 x7 r d; |, f+ B6 ]! x! C4 HSat Sep 14 04:15:00 2013 : helium level = 68 %, nitrogen level = 96 %, field = 8497.14 e# x( f% z( z7 B+ U8 A
Sun Sep 15 04:15:00 2013 : helium level = 68 %, nitrogen level = 90 %, field = 8449.91 s& p; J9 s$ K4 S: i
Mon Sep 16 04:15:00 2013 : helium level = 68 %, nitrogen level = 84 %, field = 8451.7- w8 N; S2 g" @# A
Tue Sep 17 04:15:00 2013 : helium level = 68 %, nitrogen level = 78 %, field = 8510.9* p# l" U4 r8 e1 p0 I
Wed Sep 18 04:15:00 2013 : helium level = 68 %, nitrogen level = 72 %, field = 8479.4
( ~3 G* j P- c K5 AThu Sep 19 04:15:00 2013 : helium level = 67 %, nitrogen level = 100 %, field = 8466.3. D3 }# |3 N( P& n
Fri Sep 20 04:15:00 2013 : helium level = 67 %, nitrogen level = 98 %, field = 8466.3
( {! V' M0 C% \! hSat Sep 21 04:15:00 2013 : helium level = 67 %, nitrogen level = 92 %, field = 8471.22 K7 ^' ?1 [6 q+ c; ^& U. ]" `
Sun Sep 22 04:15:00 2013 : helium level = 67 %, nitrogen level = 86 %, field = 8471.2
3 a) \3 J: G+ w7 a. GMon Sep 23 04:15:00 2013 : helium level = 66 %, nitrogen level = 80 %, field = 8502.2
- s) b/ h+ m, N/ h. i% `: FTue Sep 24 04:15:00 2013 : helium level = 66 %, nitrogen level = 74 %, field = 8472.1% p w4 _7 o l' w. A/ q! m
Wed Sep 25 04:15:00 2013 : helium level = 66 %, nitrogen level = 68 %, field = 8513.7! q: ]" H0 J' U$ g6 h @- I( v
Thu Sep 26 04:15:00 2013 : helium level = 66 %, nitrogen level = 62 %, field = 8471.00 ?: M( Z! ~& }- [7 N
Fri Sep 27 04:15:00 2013 : helium level = 65 %, nitrogen level = 100 %, field = 8474.38 f" e# h' E& Z6 I; h! ?; u
Sat Sep 28 04:15:00 2013 : helium level = 65 %, nitrogen level = 99 %, field = 8475.0
) K G2 v3 X: d: Q+ U3 L, MSun Sep 29 04:15:00 2013 : helium level = 65 %, nitrogen level = 93 %, field = 8480.3* m1 _3 K4 H* l5 G; A( m3 t
Mon Sep 30 04:15:00 2013 : helium level = 65 %, nitrogen level = 86 %, field = 8477.4
( g5 J6 k) [0 r( s7 N! z" m, l2 nTue Oct 01 04:15:00 2013 : helium level = 64 %, nitrogen level = 100 %, field = 8480.4, F. u7 F3 s# ]0 \1 U
Wed Oct 02 04:15:00 2013 : helium level = 64 %, nitrogen level = 99 %, field = 8480.4. B4 C. a: H# G6 e
Thu Oct 03 04:15:00 2013 : helium level = 64 %, nitrogen level = 93 %, field = 8480.4+ a; S3 s/ L0 k5 h( h
Fri Oct 04 04:15:00 2013 : helium level = 64 %, nitrogen level = 87 %, field = 8480.4
1 J# z1 a' U* s* c; l: D. e+ `Sat Oct 05 04:15:00 2013 : helium level = 63 %, nitrogen level = 81 %, field = 8480.4$ c% K- `& ~5 [8 g% j; j5 b
Sun Oct 06 04:15:00 2013 : helium level = 63 %, nitrogen level = 75 %, field = 8480.4
7 M: f9 @& j- e" k- LMon Oct 07 04:15:00 2013 : helium level = 63 %, nitrogen level = 69 %, field = 8480.44 O; U& L0 `* o$ i% n
Tue Oct 08 04:15:00 2013 : helium level = 63 %, nitrogen level = 63 %, field = 8480.4; l: k5 z+ M8 w8 c
Wed Oct 09 04:15:00 2013 : helium level = 62 %, nitrogen level = 100 %, field = 8514.4
" R& t, V6 N$ D+ P O5 a1 }7 NThu Oct 10 04:15:00 2013 : helium level = 62 %, nitrogen level = 98 %, field = 8514.9
/ z$ B/ P8 Q5 g2 @" R/ IFri Oct 11 04:15:00 2013 : helium level = 62 %, nitrogen level = 92 %, field = 8482.4
& g; A1 ?' [9 F# @" zSat Oct 12 04:15:00 2013 : helium level = 62 %, nitrogen level = 85 %, field = 8490.9, J L) @4 L% n7 `
Sun Oct 13 04:15:00 2013 : helium level = 61 %, nitrogen level = 79 %, field = 8490.9' A; L/ k* ]8 o5 Q
Mon Oct 14 04:15:00 2013 : helium level = 61 %, nitrogen level = 73 %, field = 8521.7% D& l9 B# Q9 ?% h1 T1 @
Tue Oct 15 04:15:00 2013 : helium level = 60 %, nitrogen level = 67 %, field = 8530.4
- n0 B# }$ j% `" Q3 E: |3 LWed Oct 16 04:15:00 2013 : helium level = 60 %, nitrogen level = 61 %, field = 8514.6
; C* I9 x ~+ N2 z. O% LThu Oct 17 04:15:00 2013 : helium level = 59 %, nitrogen level = 100 %, field = 8512.86 a( ]" R* B1 D/ j# x9 u5 G
Fri Oct 18 04:15:00 2013 : helium level = 58 %, nitrogen level = 97 %, field = 8514.29 \1 h6 m( _9 A
Sat Oct 19 04:15:00 2013 : helium level = 58 %, nitrogen level = 91 %, field = 8509.9" G/ T$ S9 N4 F, o3 G
Sun Oct 20 04:15:00 2013 : helium level = 57 %, nitrogen level = 85 %, field = 8510.7
! f4 |6 I2 O1 a: c5 X% Y+ wMon Oct 21 04:15:00 2013 : helium level = 57 %, nitrogen level = 79 %, field = 8518.7
' ^' R: l( v; U4 C$ e7 DTue Oct 22 04:15:00 2013 : helium level = 57 %, nitrogen level = 73 %, field = 8478.2$ Q, H `2 W8 s/ Q0 }
Wed Oct 23 04:15:00 2013 : helium level = 56 %, nitrogen level = 67 %, field = 8524.7# [5 A* K; G3 U/ F
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发表于 2013-10-23 14:36:43
