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FILTER RESISTOR VALUE vs SPEED THROUGH THE APERTURE for
FIXED and VARIABLE SPEEDS
The table shows the standard range of smallest aperture dimensions.
The dimensions are shown in millimetres. To convert to inches divide by 25.4 and round to the nearest whole inch.
The speed is shown in metres per minute. To convert to feet per minute multiply by 3.2808.
The resistor value 150 through 750 is in KΩ Ω Ω Ω .
The resistor values 1 and 1.5 are in MΩ Ω Ω Ω .
SMALLEST APERTURE DIMENSION fixed or variable speed - maximum & minimum
Filter
75
100
125
150
Value
150
69
92
115
138
10
13
16
19
180
61
81
102
122
8
11
13
16
220
50
67
84
100
7
9
11
13
330
34
45
57
68
5
6
7
9
470
23
31
39
47
3
4
5
6
750
15
18
24
29
2
3
4
4
1
11
14
18
22
2
2
3
3
1.5
7
10
12
15
2
2
2
3
Module 7026
Configuration and Set up Information
175
200
225
250
275
161
184
207
230
253
22
25
29
32
35
142
163
187
208
229
19
21
24
27
29
117
134
153
170
187
15
17
20
22
24
79
91
102
113
124
11
12
13
15
16
55
63
71
79
87
7
8
9
10
11
34
39
44
49
54
5
5
6
7
7
25
29
33
37
40
4
4
5
5
6
17
20
22
25
27
3
3
4
4
4
300
325
350
375
400
275
299
322
345
358
38
41
44
77
50
244
270
291
312
325
31
34
37
40
41
201
221
238
255
258
25
28
30
32
34
135
147
158
170
182
18
19
20
22
23
95
103
111
119
127
12
13
14
15
16
59
64
69
74
79
8
9
9
10
10
44
48
52
55
59
6
7
7
7
8
30
32
35
37
40
5
5
6
6
6
5-16
425
450
475
500
525
391
414
437
460
483
54
57
60
63
66
353
374
395
408
437
45
47
50
51
55
289
306
323
335
357
37
39
41
43
45
192
204
215
228
238
25
25
27
29
30
135
143
151
159
167
17
18
19
20
21
84
89
94
99
104
11
12
12
13
14
63
66
70
74
78
8
9
9
10
10
42
45
47
50
52
7
7
7
8
8
550
505
69
458
58
374
47
249
32
175
22
109
14
81
11
55
8
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