Electro-Chemical Devices (ECD) CA6 Hardness Analyzer - Manual (Page 70)

Replace Reagent(s) and reset reagent counters
Verify Micro Peristaltic pumps are primed and pumping
Run Calibrations:
• Blank with DI water,
• Slope with calibration solution
9.0.3 Every 4-6 months (depending on applications)
Replace Peristaltic Pump tubing
Manually clean 3 Way Valve(s), with a syringe
Clean Loop Valve (option) with a syringe
Replace Colorimetric Cell o-ring
Hydraulics tubing replacement
Replace Internal Seal of the mixing pump
Clean / Replace Fittings
9.0.4 Annual
Analyzer general inspection (for qualified personnel only)
9.1 Sample Pump tubing replacement
The peristaltic pump head is located in the Liquids section. Before replacing any tubing, carefully read
the Hazards and Dangers list in Section 1 and Health and Safety data sheets for the reagents. Always
wear protective clothing, gloves and eye protection. Use extreme care during tubing replacement to
avoid spills. See MasterFlex video at
http://www.youtube.com/watch?v=zC1INbSnf8o .
Proceed as follows:
• Stop the analyzer and switch OFF the power.
• Using the key, open the liquids enclosure.
• Unscrew the four screws that hold the pump head in place.
• Disconnect the pump tubing from its inlet and outlet fittings, use caution to avoid liquid spills.
• Slide the pump head to the left and remove the pump head.
• Separate the two halves. Use care with the rotor and remove the used tubing.
• Place the half containing the rotor with the rollers in the 2, 6 and 10 o’ clock positions. Place
tubing in the outer groove and against the two rollers as shown. Keep your thumb on the tubing
to hold it in place and insert the tubing key on the back of the rotor shaft and push in as far as
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