Hach 5740sc, User Manual, Page: 36 / 50

36
Maintenance
6.4 Replacing the Sensor Assembly
The sensor assembly consists of a pre-installed membrane, electrolyte, and electrode.
1. Unscrew the sensor guard or optional lock ring and remove the spent or damaged
sensor assembly.
2. Install the o-ring onto the groove in the probe body, see item 2 and 3 in
Figure 13 .
3. Align the sensor assembly connector with the probe body socket, see item 6 in
Figure 13 .
4. Reinstall the sensor guard or lock ring.
5. Condition the new sensor before taking measurements. See section 5.2 on page 23 .
Figure 13 Replacing the Sensor Assembly
1. Probe Body 4. Sensor Assembly
2. Item 3 seats in groove. 5. Sensor Guard (if sensor guard is not used, install the optional
lock ring)
3. O-ring, (Cat. No. 1857100) 6. Check for connector orientation during assembly.
2
6
3 1 4 5
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