44
SECTION 5, continued
4. Cut two 2-inch lengths of 1/16” ID tubing (white) and two 2-inch lengths of
0.043" ID tubing (brown). Install one 1/16 to 1/8 barb elbow fittings in one of
the 1/16" ID tubes (white) and 1/16” barb union fittings in the three
remaining tubes. Although one of the pump tubes is not used for fluid flow, it
must be included to provide even compression on all four tubes.
Note: Priming reagents can reduce start-up time, see Section 3.2.1.
5. Install the two screws through the pinch plate and into the pump/valve
module. When securing the pinch plate, advance the screws in small
increments moving from one screw to the other so that the plate is drawn
down evenly. Tighten until snug, do not overtighten.
6. Set the POWER switch to ON and restore sample flow through the
instrument. Allow the instrument to run for approximately one hour to fill the
reagent lines.
5.1.3 Tubing Replacement
Figure 17 illustrates the tube routing configuration for the Hardness Monitor.
Numbers on the pictorial correspond to the item numbers listed in the legend
where the size, catalog number and quantity also are given. The length given in
the description tells how long that particular tubing segment should be; the
operator must cut a piece to that length from a coil of the proper tubing.
The catalog number given for the tubing in the legend identifies the coil of tubing
from which to cut the segment and not the number for the segment itself.
When installing new tubing it is helpful to dip the ends in hot water before
making the connections. It also is recommended that one tube at time be removed
and replaced.
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