Particle Counts vs. Time Intervals

Time (s)
Mid-Time (s)
Cumulative Count
Net count during interval
( = Cumul. - B’grd )
Count in interval
(NetCtRow n+1 - NetCtRow n)
0 – 20
10
288
275
275
20 – 40
30
536
510
235
40 – 60
50
781
742
232
60 – 80
70
998
946
204
80 – 100
90
1172
1107
161
100 – 120
110
1328
1250
143
120 – 140
130
1444
1353
103
140 – 160
150
1563
1459
106
160 – 180
170
1677
1560
101
180 – 200
190
1768
1638
78
200 – 220
210
1848
1705
67
220 – 240
230
1922
1766
61
240 – 260
250
1980
1811
45
260 – 280
270
2040
1858
47
280 – 300
290
2084
1889
31
300 – 320
310
2119
1911
22
320 – 340
330
2169
1948
37
340 – 360
350
2201
1967
19
360 – 380
370
2233
1986
19
380 – 400
390
2265
2005
19
400 – 420
410
2286
2013
8