Hanna Instruments PCA 300 Series - Manual (Page 16)

16
Return Line Installation
The return hose fitting is a 12 mm (1/2”) hose barb on the
bottom of the regulator output port and should always be
connected even when pressure is below 1 bar.
INSTALLING THE INPUT FILTER
In order to ensure maximum accuracy of measurements, it is
recommended to have always clear sample, with suspended
particles smaller than 0.5 µm. This can be achieved by in-
stalling two filters before the sample input.
The type of filters depends on the quality of the water: the first
filter should have 50-100 µm pore size, whereas in any case
the second filter, the one closer to the analyzer, has to be
0.5 µm.
For correct installing procedure and maintenance, see the
instructions of filters.
INSTALLING THE PUMP TUBES
Locate the analyzer reagent tubes in the accessory kit. Each
tube is composed of three sections. The sections are joined
together by plastic connectors with plastic collars at the ends
of the center section.
Locate the peristaltic pump.
Feed one tube from the shorter end section behind the pump
rollers from the right side of the pump. Seat the plastic collar
at the right end of the center sec-
tion of tubing into the lower right
indentation hole of the pump face.