Hach-Lange WPC-22 - Manual (Page 12)

Connect the sample stream
Install the sample line into a larger process pipe to minimize interference
from air bubbles or pipeline bottom sediment. A sample line that goes
into the center of a process pipe is best.
Figure 7 shows examples of good and bad methods of sample line
installation into a process pipe.
Keep the sample line as short as possible to decrease analysis delay.
Sediment can collect in long sample lines.
Figure 7 Sampling methods
1 Air 2 Sample flow
Startup
Set the power to on
1. Connect the power cord to an electrical outlet with earth ground.
2. Open the enclosure door. Loosen all four captive screws that attach
the enclosure door.
3. Set the power switch to on.
4. Close the enclosure door. Tighten all four captive screws that attach
the enclosure door.
User interface and navigation
User interface
Figure 8 shows the display, keypad and indicator lights. Refer to Table 6
for key descriptions. Refer to Table 7 for indicator light descriptions.
Figure 8 User interface
1 Alarm light 5 Power light
2 F1 key 6 ENTER key
3 START/STOP key 7 F2 key
4 Display 8 Sensor light
12 English