Hach 900 MAX manual Installing the Pump Tube in the Sensor Body, Section, Pump Tube Loading

Section 2

2.3 Installing the Pump Tube in the Sensor Body

Note: Do not stretch the tubing in the sensor body, as this could affect the ability of the sensor to detect liquid through the pump tubing.

Note: Use the proper length of silicone tubing in the pump body. An improper length can reduce the life of the tubing and pump rollers. Refer to Figure 5 for the correct length.

1.Remove the four screws on the pump cover (Figure 5).

2.Remove the front cover of the pump housing. Remove the tubing. Locate the black dots on the tubing. The end of the tube that extends farthest beyond the black dot attaches to the stainless steel tubing connector.

3.Install the pump tube in the pump housing so the black dots are visible just outside the pump body.

4.After inserting the new pump tube as shown, reinstall the front cover and secure it with the four screws until finger tight.

5.Make sure that the tubing extends through the liquid sensor and out of the controller as shown in Figure 6.

Figure 5 Pump Tube Loading

11 5/8 in.

(Tubing in Pump)

To Intake Tubing Connector

5 3/4 in. to Sample Fitting

Figure 6 Installing Pump Tube Through the Sensor Body

Page 24
Installing the Pump Tube in the Sensor Body	8990hrd.fm