Maintenance Schedule - Hach Ldo Sc Model 2 Sensor Benutzerhandbuch
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Verfügbare Sprachen
Verfügbare Sprachen
The hazardous location certified version of this product does not fulfill the requirements of the 94/9/EC Directive
(ATEX Directive).
9.1 Maintenance schedule
Do not disassemble the sensor for maintenance or cleaning.
The maintenance schedule shows minimum intervals for regular maintenance tasks. Perform
maintenance tasks more frequently for applications that cause electrode fouling.
Maintenance task
Clean the sensor
on page 16
Inspect the sensor for damage
Replace the sensor cap
Calibration
on page 12
9.2 Set or change the clean interval
Application conditions may need shorter or longer durations between manual sensor cleanings. The
default clean interval is 0 days. To change the cleaning interval, refer to Cleaning interval (or CLEAN
INTRVL) in
Configure the sensor
9.3 Clean the sensor
Clean the exterior of the sensor with a soft, wet cloth.
Note: If the sensor cap must be removed for cleaning, do not expose the interior of the cap to direct sunlight for
extended periods of time.
9.4 Replace the sensor cap
Potential explosion hazard. The sensor setup cap is not rated for hazardous location use.
Replacement sensor caps and setup caps are shipped with installation instructions. Refer to the
included instructions to change the cap. After the new sensor cap is installed, make sure that the lot
number on the sensor cap is the same lot number that is read by Modbus. The sensor uses the
calibration information from the sensor cap.
For best performance and accuracy, replace the sensor cap:
• Every two years, or more frequently if necessary
• When routine inspection shows significant erosion of the sensor cap
Section 10 Troubleshooting
10.1 Sensor diagnostic and test menu
1. Go to the diagnostics/test menu:
• SC4500 Controller—Select the tile of the device, then select Device menu >
Diagnostics/Test.
16 English
on page 16
on page 10.
N O T I C E
N O T I C E
Recommended minimum frequency
As recommended by regulatory agencies
W A R N I N G
90 days
90 days
2 years
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