Hach-Lange SENSION+ 50 49 User Manual - Manual (Page 13)

Pull straight to remove or connect the probes. Do not turn the connector. Look to the color coding of
the probe and multisensor connectors. Use the white mark to position the probes in the multisensor
connectors. Refer to
Figure 2 for more details.
Figure 2 Replace the probes
1 Blue connector: Dissolved
oxygen probe
2 Green connector: Conductivity
probe
3 Black connector: pH probe
Clean the probes
N O T I C E
Do not rub or touch the tip of the pH or dissolved oxygen sensors.
Clean the probe when there is contamination on the sensor. Symptoms of contamination are:
• Readings are not accurate or consistent.
• The stabilization time is slow.
• A calibration error occurs.
• Contamination is visible on the probe (i.e., dirt).
To clean the dissolved oxygen probe of the multisensor, refer to Dissolved oxygen probe
on page 12.
1. For general contaminants, rinse the probe with deionized water. Blot dry with a lint-free cloth.
2. For other contaminants:
a. Soak the pH and/or conductivity probes of the multisensor in the applicable cleaning agent.
Refer to Table 2 .
b. Rinse or soak the sensors for 1 minute in deionized water. Blot dry with a lint-free cloth.
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