Hach WPC-21 Manual Del Usuario página 13

c. Connect the incoming and outgoing cable wires to the J4 connector. Refer to
3. Do step 2 again for the third and remaining units until all the units have incoming and outgoing
connections. The last unit will not have an outgoing cable.
Note: In a network installation, the outgoing cable from the previous unit is always the incoming cable on the
next unit.
4. On the last unit, install a jumper across JP2. Do not install a jumper across JP2 on the other
units.
5. Set the MODE option to N (network mode). Refer to the Date/MODE option in
particle counter on page 16.
6. Assign a unique address to each unit. Refer to the Unit ID option in
on page 16.
Shield
Plumbing
Plumb the instrument
Items to collect:
• 6 mm OD opaque tubing
• Two, 6 mm ferrules
Select tubing based on the worst case environmental conditions (e.g., temperature range, exposure
to sunlight, contaminants in the air) and the highest possible inlet pressure (maximum of 120 psi).
1. Remove the tubing from the sample line fitting and drain line fitting and discard. Do not reuse the
tubing for the sample line or drain line.
2. Connect a sample line to the sample line fitting on the body of the instrument. Refer to
3. Connect a drain line to the drain line fitting on the body of the instrument. Refer to
4. Install a Y-strainer in the sample line as necessary to prevent large particles from entering the
sensor which will result in a blockage.
5. Install a manual isolation valve in the sample line so that the flow to the instrument can be
stopped as necessary.
Table 5 RS485 connections
Wire
–
+
Table 5.
Configure the
Configure the particle counter
J4 pin
RS485A
RS485B
SGND
Figure
Figure
English 13
6.
6.