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Calibration without "Service"
flow screen
Offset correction
Gain correction
Flow screen correction data
TRM, Centiva/5 Plus, M1047448/ CM-922026, rev. 3.50.a of 11/05
In case expiration flow sensor calibration must be performed without a "service"
flow screen, follow this sequence:
35. . Perform offset calibration as described in steps 1 to 12 in chapter 4.7.5.
36. For the gain correction without using a "service" flow screen you need to know
the current flow screen's tolerance. This tolerance is visible on the rim of the
flow screen.
37. For gain correction start with step 13 in chapter 4.7.5.and remove the built-in
flow screen according to step 14.
38. Read and note the "Insp." % tolerance in the flow screen correction table
below.
39. Insert the flow screen again into the expiration valve assembly and screw the
flow screen retainer.
40. Perform gain correction as described in step 16 to 30 in chapter 4.7.5.
41. At step 19. use the new value from the flow screen correction table for step 19.
that matches with the noted flow screen tolerance.
(Example: Tolerance = + 4.5 %, calibration value for step 19. is 28.7 l/min)
42. At step 25. use the new value from the flow screen correction table for step 25.
that matches with the noted flow screen tolerance.
(Example: Tolerance = + 4.5 %, calibration value for step 25. is 9.6 l/min)
43. At step 28. use the new value from the flow screen correction table for step 28.
that matches with the noted flow screen tolerance.
(Example: Tolerance = + 4.5 %, calibration value for step 28. is 57.3 l/min).
Flow screen tolerance "Insp"
table
+ 9.99 % to + 9.00 %
+ 8,99 % to + 8.00 %
+ 7.99 % to + 7.00 %
+ 6.99 % to + 6,00 %
+ 5.99 % to + 5.00 %
+ 4.99 % to + 4.00 %
+ 3.99 % to + 3.00 %
+ 2.99 % to + 2.00 %
+ 1.99 % to + 1.00 %
+ 0.99 % to + 0.5 %
0.00 % ("Service" flow screen)
- 0.5 % to – 0.99 %
- 1.00 % to – 1.99 %
- 2.00 % to – 2.99 %
- 3.00 % to – 3.99 %
- 4.00 % to – 4.99 %
- 5.00 % to – 5.99 %
- 6.00 % to – 6.99 %
- 7.00 % to – 7.99 %
- 8.00 % to – 8.99 %
- 9.00 % to – 9.99 %
4 Test and calibration
New value
New value
for step 19.
for step 25.
27.2
9.1
27.5
9.2
27.8
9.3
28.1
9.4
28.4
9.5
28.7
9.6
28.9
9.7
29.3
9.8
29.6
9.9
29.8
9.9
30.0
10.0
30.2
10.1
30.5
10.2
30.8
10.3
31.1
10.4
31.4
10.5
31.7
10.6
32.0
10.7
32.3
10.8
32.6
10.9
32.9
11.0
New value
for step 28.
54.3
54.9
55.5
56.1
56.7
57.3
57.9
58.5
59.1
59.7
60.0
60.3
60.9
61.5
62.1
62.7
63.3
63.9
64.5
65.1
65.7
4-27
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