Hanna Instruments HI 903 - Manual (Page 120)

8-4
MAINTENANCE, PERIPHERALS
8.1.3 Disassembling the Dispensing Tube and Aspiration Tube
Both the aspiration and the dispensing tubes have a fitting and a tube protector. The
aspiration tube will be mounted in the left side and the dispensing tube will be mounted in
the right side of the burette.
To remove the dispensing tube and the aspiration tube follow these steps:
• Slide the tube protector up (A);
• Remove the tube lock (B) from the burette holder;
• Unscrew the fitting (C);
• Repeat these steps for the aspiration tube.
8.1.4 Assembling the Dispensing Tube and Aspiration Tube
To attach the dispensing tube and the aspiration tube follow these steps:
• Insert the end of the dispensing tube with the tan-colored fitting (A) into the valve
outlet;
• Screw in the fitting so that the highest of its 9 cuts stays vertical in the final position;
• Bend the tube up into vertical position to enter the highest cut of the fitting;
• Put the tube lock on (B) the fitting;
• Slide down the tube protector (C) into the dedicated gap of the tube lock;
• Repeat these steps for the aspiration tube.