15.C.0.5 Calibrating the wastegate I/P converter
Before starting calibration of the wastegate I/P converter, the
wastegate positioner must first be adjusted. See section 15.C.0.4.
The calibration can be done in the following ways:
Using the software service tool WECSplorer (only for WECS
8000). Contact nearest network office for more information and
instructions.
Using a mA calibrator.
15.C.0.5.1
Manually with mA calibrator (WECS 3000 and WECS 8000)
For the calibration a 4-20 mA current calibrator is needed. Wärstsilä
spare part no. 800 119 and 800 120.
1 The engine must be stopped.
2 Enable control air
by connecting 24 VDC to CV311 or by press-
ing the button on the solenoid (6) (during the whole calibration
procedure).
3 Connect the mA calibrator to the I/P converter.
See Fig
15C-5.
4 Set the mA to equal 30 degrees on the cam (14).
See table 1
below.
5 Adjust the zero adjustment screw (20) on the I/P converter
(marked with Z on the coverter) so that the pointer on the wastegate
points at 30 degrees.
6 Set the mA to equal 60 degrees on the cam (14).
See table 1
below.
7 Adjust the span adjustment screw (21)
(marked with S on the
converter) until the pointer points at 60 degrees.
8 Repeat steps 4-7 above until it shows correct values.
9 Check the whole range according to the table 1.
If 4mA
does not equal 0 degrees, adjust with the zero adjustment screw.
Table 1.
Degrees [°]
Current [mA]
WECS
3000
WECS
8000
0
4,0
4,0
15
6,7
6,4
30
9,3
8,8
45
12,0
11,2
60
14,7
13,6
75
17,3
16,0
90
20,0
18,4
32-200247
Turbocharging and Air Cooling
Appendix C
