Electro-Chemical Devices (ECD) CA6 Hardness Analyzer - Manual (Page 71)

possible. Tubing is now positioned in the pump head body. With the key firmly pressed against
the rotor, push down while turning counter clockwise until tubing is seated around the rotor.
• The tubing is now in place. Remove key and position other pump half into the rotor shaft and
snap shaft. Be careful not to pinch the tubing between the pump halves.
• Verify the pump turns correctly using the key.
• Slide the pump head onto the mounting screws moving the roller block with the key or with a
screwdriver until the shaft aligns with the motor drive.
• Secure the pump head with the four screws, hand tighten until it is firmly mounted.
• Restart the analyzer.
Figure 9-1: Pump tubing replacement details
9.2 Micro Peristaltic Tubing Replacement
The Miniature Pump model peristaltic pumps are located in the liquid enclosure. Before proceeding to
replace the tubing, it is recommended to wear adequate clothes, gloves and eyes protection and take
extreme care with reagent spills during tubing replacement. (Read reagents' MSDS).
1. Stop the analyzer in stand-by. Open the liquids enclosure
and disconnect the reagent's inlet line from its container
taking caution to prevent liquid spills.
2. Using Manual mode activate the peristaltic pump for 10
seconds, the pump will suck air and the internal tubing
will be empty of liquid.
3. Disconnect the outlet tubing taking caution to prevent
liquid spills.
4. Unscrew the 3 TSPEI M3x8 screws using an Allen Key.
5. Remove the Plexiglas pump cover.
6. Remove the 3 black rollers and the used tubing.
7. Disconnect the inlet and outlet fittings from the pump
tubing.
8. Insert the inlet and outlet fittings in the new tubing.
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