33
Calibration
4000 MiD® Instructions, V6695
9.2 Removing and replacing the spraychip
Replace the spraychip
®
200
when sensitivity decreases to unacceptable
levels. Please follow the procedure below in the event that the spraychip
has to be replaced or removed.
1.
Put the MiD into standby mode, if necessary, by clicking the Operate/
Standby button.
2.
Activate the N2 flush, after a few seconds a flow of nitrogen gas
should be audible.
3.
Ensure the door is fully open at 90˚.
4.
Disconnect the flow interface (DFI or SFI) high-voltage connector
from the high-voltage output located at the front of the MiD (see
5.
Unscrew the spraychip assembly from the MiD. Once removed, a
dust cap should be fitted to the vac-chip assembly.
6.
Unscrew the grub screw to unfasten the spraychip from the assembly
(see Fig. 32 for reference).
Fig. 18
The Split Flow Interface (SFI)
7.
Carefully unscrew and remove the spraychip from the DFI/SFI.
8.
Carefully screw a new (or cleaned) spraychip into the assembly.
Note:
Do not use a tool and do not overtighten the spray-
chip.
9.
Tighten the grub screw. This fastens the spraychip into position.
10.
Align the DFI/SFI and spraychip with the opening in the vac-chip
assembly
11.
Gently slide the DFI/SFI into the assembly until the PEEK screw rea-
ches the threaded section of the vac-chip assembly. Take care during
insertion that the spraychip does not collide with the metalwork.
12.
Screw the PEEK collar into the assembly until finger tight.
Note:
If there is any excessive resistance when tightening the
screw, stop and repeat steps 6–12.
13.
Connect the high-voltage connector from the DFI/SFI to the
high-voltage output located at the front of the MID (see Fig. 15).
14.
Close the door.
Procedure
Grub screw
PEEK screw
spraychip 200
Metal collar
Main body
