Hach 8362sc, User Manual

Page: 13 / 58

13
Installation
3.3 Sample Connections
1. Connect the sample stream flow to the sample-in port.
2. Connect a drain tube to the sample-out port.
Note: It is not recommended to run the sample stream back into the main flow stream.
3. Introduce the sample and visually check the measurement chamber for bubbles that
could disturb the measurement.
4. Adjust the flow to between 100–300 mL/min (100–300 cc/min) for best results.
3.4 Flow Rate and Pressure
Observe the following for optimum operation:
• Keep the flow constant at a rate between 100–300 mL/min (100–300 cc/min) at a
maximum pressure of 4 bar (58 psi) for best operation.
• Keep the drain line as short as possible to avoid back-pressure.
• Earth ground the flow chamber to protect it from external electrical noise
(
Figure 3 ).
• Do not allow the flow chamber to become empty. Keep the glass electrode bulb in
water to avoid electrode damage.
• Use the protective cap filled with KCl (3 M) on the pH or ORP electrode for storage
of up to one year. Never store your electrode in air even if it is in the flow chamber.
3.5 Connecting to the Controller
Connect the extension cable from the controller to the panel with the quick-connection
fitting on the side of the junction box (
Figure 3 ). See the controller user manual for detailed
information on configuring and using the controller.
3.6 Wiring the Probe to the Junction Box
Refer to Figure 4 and Table 1 on page 15 when installing new cables from the pH/ORP
electrode or temperature sensor to the junction box.