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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？: a4 x5 h& _; [/ G, {
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Fri Sep 13 04:15:00 2013 : helium level = 69 %, nitrogen level = 100 %, field = 8510.1
4 B- S H) j+ U& k" A) C4 pSat Sep 14 04:15:00 2013 : helium level = 68 %, nitrogen level = 96 %, field = 8497.1
5 q+ [+ S& d* W% I3 Z7 N4 ASun Sep 15 04:15:00 2013 : helium level = 68 %, nitrogen level = 90 %, field = 8449.9
$ S3 y% s% K' }- B" CMon Sep 16 04:15:00 2013 : helium level = 68 %, nitrogen level = 84 %, field = 8451.7; T! K( I8 c! p
Tue Sep 17 04:15:00 2013 : helium level = 68 %, nitrogen level = 78 %, field = 8510.9
# d C+ S& @( E9 P9 ?Wed Sep 18 04:15:00 2013 : helium level = 68 %, nitrogen level = 72 %, field = 8479.40 o+ K# c; P$ N9 K- v) t
Thu Sep 19 04:15:00 2013 : helium level = 67 %, nitrogen level = 100 %, field = 8466.3
- p1 i1 \! I1 ]( t% nFri Sep 20 04:15:00 2013 : helium level = 67 %, nitrogen level = 98 %, field = 8466.30 C! J4 T0 n- T2 B% H2 R. I, x
Sat Sep 21 04:15:00 2013 : helium level = 67 %, nitrogen level = 92 %, field = 8471.2
; e0 {. g" {0 S, M2 ]& ySun Sep 22 04:15:00 2013 : helium level = 67 %, nitrogen level = 86 %, field = 8471.23 j- w3 L4 ]( X& p) @3 @' Q- x2 C
Mon Sep 23 04:15:00 2013 : helium level = 66 %, nitrogen level = 80 %, field = 8502.2- C; M: A' c4 S( ?& X: I1 z5 F6 s/ E
Tue Sep 24 04:15:00 2013 : helium level = 66 %, nitrogen level = 74 %, field = 8472.12 g' q' x" R B4 d$ P1 F
Wed Sep 25 04:15:00 2013 : helium level = 66 %, nitrogen level = 68 %, field = 8513.7
/ C5 J1 v9 y! v6 q5 uThu Sep 26 04:15:00 2013 : helium level = 66 %, nitrogen level = 62 %, field = 8471.0: ^' r" E' Q: A6 S" I- I/ l5 q
Fri Sep 27 04:15:00 2013 : helium level = 65 %, nitrogen level = 100 %, field = 8474.32 Z! E+ s' S' p! r7 u( V+ X1 Q
Sat Sep 28 04:15:00 2013 : helium level = 65 %, nitrogen level = 99 %, field = 8475.0
/ Y [6 V! _% T- x- l" p& vSun Sep 29 04:15:00 2013 : helium level = 65 %, nitrogen level = 93 %, field = 8480.30 v1 m/ K+ E' ^
Mon Sep 30 04:15:00 2013 : helium level = 65 %, nitrogen level = 86 %, field = 8477.4
, Z* H5 a5 \) l: @$ \ `Tue Oct 01 04:15:00 2013 : helium level = 64 %, nitrogen level = 100 %, field = 8480.4
3 Z2 z3 z; U& x& j( w- _Wed Oct 02 04:15:00 2013 : helium level = 64 %, nitrogen level = 99 %, field = 8480.4
% G. n- z+ {4 k& X5 e) RThu Oct 03 04:15:00 2013 : helium level = 64 %, nitrogen level = 93 %, field = 8480.40 s5 V' ?0 Q1 t3 x: m
Fri Oct 04 04:15:00 2013 : helium level = 64 %, nitrogen level = 87 %, field = 8480.4; ^9 R+ T) Y' ^5 F9 p
Sat Oct 05 04:15:00 2013 : helium level = 63 %, nitrogen level = 81 %, field = 8480.45 ^' |2 I' t) {1 \
Sun Oct 06 04:15:00 2013 : helium level = 63 %, nitrogen level = 75 %, field = 8480.4
# T" B- O( F- g4 B. r$ M; f' D3 }! EMon Oct 07 04:15:00 2013 : helium level = 63 %, nitrogen level = 69 %, field = 8480.4
. D$ u7 C. ^: Y- @1 d4 l% xTue Oct 08 04:15:00 2013 : helium level = 63 %, nitrogen level = 63 %, field = 8480.4$ K5 K! s, x: i7 Z* b
Wed Oct 09 04:15:00 2013 : helium level = 62 %, nitrogen level = 100 %, field = 8514.4
+ c, p0 N7 z4 J, MThu Oct 10 04:15:00 2013 : helium level = 62 %, nitrogen level = 98 %, field = 8514.9
" U5 |; m* I7 |# L s& fFri Oct 11 04:15:00 2013 : helium level = 62 %, nitrogen level = 92 %, field = 8482.4
8 c8 [+ P1 T: z0 ?/ b; hSat Oct 12 04:15:00 2013 : helium level = 62 %, nitrogen level = 85 %, field = 8490.9
/ L- S6 t8 m( V1 ^Sun Oct 13 04:15:00 2013 : helium level = 61 %, nitrogen level = 79 %, field = 8490.99 b$ h# g& `: \% z, l# p# U
Mon Oct 14 04:15:00 2013 : helium level = 61 %, nitrogen level = 73 %, field = 8521.7
* U q- T5 u3 Z# [+ z1 QTue Oct 15 04:15:00 2013 : helium level = 60 %, nitrogen level = 67 %, field = 8530.4 ~$ l" `4 ?; {1 I" \
Wed Oct 16 04:15:00 2013 : helium level = 60 %, nitrogen level = 61 %, field = 8514.6( p6 N( x# e Z; N
Thu Oct 17 04:15:00 2013 : helium level = 59 %, nitrogen level = 100 %, field = 8512.8- K5 P) k7 W, Y
Fri Oct 18 04:15:00 2013 : helium level = 58 %, nitrogen level = 97 %, field = 8514.2
/ b3 L7 ? e: a1 E2 jSat Oct 19 04:15:00 2013 : helium level = 58 %, nitrogen level = 91 %, field = 8509.9
( J& v& `$ Q. x+ P' CSun Oct 20 04:15:00 2013 : helium level = 57 %, nitrogen level = 85 %, field = 8510.7
; B0 T8 H, e- y fMon Oct 21 04:15:00 2013 : helium level = 57 %, nitrogen level = 79 %, field = 8518.74 j- j! b# q6 v" G) W
Tue Oct 22 04:15:00 2013 : helium level = 57 %, nitrogen level = 73 %, field = 8478.2
5 i. @1 ^0 ?. g8 V: QWed Oct 23 04:15:00 2013 : helium level = 56 %, nitrogen level = 67 %, field = 8524.7
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发表于 2013-10-23 14:36:43
