Hach-Lange SONATAX sc - Manual (Page 27)

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Section 5 Maintenance
No components that can be serviced by the user are in the inside of
the probe. Opening of the probe by the user leads to the loss of the
manufacturer guarantee and may cause malfunctions.
The cleanliness of the ultrasound transducer is crucial for the
accuracy of the measurement results.
The installed wiper is able to remove all impurities under normal
circumstances and if the selection of the wiper interval is not too
large (30 minutes).
If the regular check of the probe head and of the wiper (monthly)
indicates dirt, wear of the wiper rubber or a defect, then either the
probe head must be cleaned, or the wiper profile and/or the
defective part must be exchanged.
5.1 Maintenance tasks
Take the maintenance intervals from Table 3 .
5.2 Wiper change
1. Go to SENSOR SETUP > TEST / MAINT >
REPLACE PROFILE.
The wiper arm (refer to item 3 in Figure 12 ) moves for the wiper
change into a central position.
2. Remove the guide screw (refer to item 2 in Figure 12 ) and take
off the wiper arm.
3. Pull the wiper profile (refer to item 1 in Figure 12 ) forward out of
the wiper arm.
4. Slide a new wiper profile with the bevel at the front into the
guide.
D A N G E R
Multiple hazards. Only qualified personnel must conduct the tasks
described in this section of the document.
Table 3 Maintenance schedule
Time interval Action
Monthly Visual inspection, if necessary, clean
Annually, at the latest after 20,000 wipe cycles Change wiper rubber
C A U T I O N
Obey the locally applicable accident prevention regulations. Wear
protective gloves where necessary during the change of the wiper
rubber.