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2.4.2 Sampling Pump
Model CA-6 uses a Masterflex® peristaltic pump for sampling. The Model # of the pump is printed on the
cover and the Model # includes the two digit tubing size designator. Proper diameter and material of the
tubing must be used for proper functioning of the CA-6 Analyzer, use only ECDA replacement tubing and
parts. The pump is located in the liquid
enclosure.
2.4.3 3 Way Valve
The use of 3 Way Valves allows the CA-6 to
perform automatic operations. An operator
can set up auto-calibration, auto-validation or
auto-cleaning functions. The valve is located
in the liquid enclosure.
2.4.4 Micro Peristaltic Pumps
The reagents are dispensed with “Micro
Peristaltic Pumps“. Up to 4 pumps can be
installed in the analyzer, allowing the use of
up to 4 different reagents. Every 1 second
pulse of the pump allows a 0.05 ml dose of
reagent. The pumps are located in the liquid enclosure.
2.4.5 Mixing Pump
The sample and reagents are mixed with a diaphragm pump. The liquids are pumped from the lower
part of the colorimetric cell to the upper part for a specified period of time. Flow direction (inlet / outlet)
of the pump is indicated with the symbols (V) and (Λ) on the pump body. The mixing pump is located in
the heater block incasing.
2.4.6 Pinch Valve
The normally-closed pinch valve is used to control the draining or rinsing of the colorimetric cell. When
the valve is actuated it opens and drains the cell. The valve can be manually actuated by pressing the
black plastic face. The pinching jaws are sized for ⅜” O.D. Silicon or Viton tubing. The size and material of
the tubing is VERY IMPORTANT, use only ECDA spares. The pinch valve is located in the liquid enclosure.
This tubing should be checked regularly for proper sealing.
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