40
Calibration
4000 MiD® Instructions, V6695
11.
Use the weight of the input union to maintain pressure on the tube
whilst tightening the nut into the reducing union.
12.
Press the unions and tube back into position within the DFI. The
unions will click into the metal clips and the moulding of the DFI
base. Ensure the unions are fitted as shown in Fig. 38.
Note:
The unions will only fit into the DFI base in one confi-
guration. Do not force the unions to fit.
13.
Refit the DFI cover and tighten the 3 securing screws using the PH1
Phillips screwdriver.
14.
Refit the metal collar and PEEK screw by reversing steps 3-5.
The DFI low flow tube has been successfully changed. Fit either a spray-
chip 200 or measure the flow rate (Liquid flow rate measurement). If
the initial problem persists and/or you have any queries please contact
KNAUER.
9.6.2 Replacing the Split Flow Interface tubing
The following procedure should be used to replace the tubing inside the
SFI.
1.
Place the SFI onto a clean surface.
2.
If fitted remove the spraychip from the SFI (see „8.2 Removing and
replacing the spraychip“ on page 33).
3.
Unscrew the grub screw until the metal collar will rotate when twis-
ted.
Note:
Do not completely remove the grub screw from the
metal collar.
4.
Rotate the collar until the grub screw is in the ‘11 o’clock’ position,
gently remove/pull the metal collar from the body of the SFI (Fig. 40).
Fig. 26
SFI with PEEK screw and metal collar
5.
Unscrew the input line nut (Fig. 40 and Fig. 41) and associated
tubing.
6.
Using the PH1 Phillips screwdriver, loosen the three screws in the
main body of the SFI. Once the screws are loose remove the top
cover of the SFI (Fig. 41).
Procedure
PEEK screw
Metal collar
Grub screw
Input line nut
