HYDROLAB HL Série Manuel De L'utilisateur page 26

10.4 Sensor guidelines
Keep deposits off the sensor for best measurements. Examine the sensor to make sure that there
are no contaminants. Keep the substances shown in
Substance
Oil, sediment or biofilms
10.5 Maintenance
10.5.1 Clean the sensor
To prevent damage to the sensor, do not use organic solvent solutions (e.g., acetone or methanol) to clean the
sensor. Organic solvents cause damage to the plastic housing and sensor membrane.
To prevent damage to the sensor membrane, do not use cleaning chemicals to clean the sensor membrane.
Clean the sensor after each deployment to remove unwanted material (e.g., oil, biological growth and
dirt). In addition, clean the sensor before and after calibration.
Adjust the sonde deployment time in accordance with how quickly sensor fouling occurs in the
deployment waters.
1. Clean the sensor with:
• Mild detergent
• Warm water
• Clean, soft toothbrush
Note: Do not use dishwashing liquid to clean the sensor. Dishwashing liquid and household cleaners with skin
moisturizer can put a film on the sensor.
2. Rinse the sensor with clean water.
3. Soak the sensor in clean water for a minimum of 30 minutes.
4. Examine the sensor cartridge membrane. If unwanted material is seen on the sensor cartridge
membrane, use only a soft brush to carefully sweep the sensor cartridge membrane or damage
can occur.
5. Rinse the sensor with clean water.
6. If the substance cannot be removed, contact technical support.
10.5.2 Replace the sensor cartridge
Replace the sensor cartridge when it can no longer be calibrated or if the sensor cartridge is
damaged. Refer to the illustrated steps that follow.
26 English
Table 7 Contaminants
Damage
Contaminates the sensor. If the sensor is contaminated, clean the sensor.
N O T I C E
N O T I C E
Table 7 away from the sensor.