Hach 2200 PCX Manuel D'utilisation page 11

Figure 5 Plumbing connections with measurements
1 Sensor outlet port
2 Quick-connect fitting
3 ¼ in. black flexible tubing, 308.4 mm (12 in.)
4 Adjustment cap
5 Shut-off valve in plumbing tap
6 Water weir drain fitting
Measure the flow rate
Set the distance from the overflow to the bottom of the adjustment cap to 832 mm (33 in.) for a flow
rate approximately 100-mL/min. Move the adjustment cap up to decrease the flow. Move the
adjustment cap down to increase the flow. The flow rate changes about 1 or 2 mL per minute when
the adjustment cap is moved 25.4 mm (1 in.) in vertical direction. Do the steps that follow to measure
the flow rate. Refer to
1. Turn the adjustment cap and collect sample in a 200-mL graduated cylinder for 1 minute.
2. Record the result as mL/min.
3. To adjust the flow rate by 1 to 2 mL/min, move the adjustment cap 1 in. up or down.
4. If necessary, measure the flow rate again. The results of the count concentration data will be
more accurate, the more accurately the flow is set.
1
Refer to the installation configurations A and B to correctly install the black tubing on the quick-
connect fittings (A) and the water weir inlet and outlet fittings (B).
1
Figure 6.
7 Water weir outlet
8 ¼ in. black semi-rigid tubing, 3.05 m (10 ft)
9 ½ in. I.D. clear drain tubing
10 Water weir inlet
11 ¼ in. flexible tubing, 45.72 cm (18 in.)
12 Sensor inlet port
English 11