Maintenance; Clean The Sensor - HACH LANGE FH950 Basis Bedienungsanleitung

Option Description
Station entry
• Fixed—The operator puts in the width of the stream and the number of stations for
• Non-fixed (default)—The operator selects the spacing between station verticals. This is
Restore Sets all meter options to the factory default values.
defaults
4. Diagnostics— Select this option to troubleshoot problems with the meter or an attached sensor.
For more information about the Diagnostics options, refer to

Maintenance

Clean the sensor

Chemical exposure hazard. Obey laboratory safety procedures and wear all of the personal protective
equipment appropriate to the chemicals that are handled. Refer to the current material safety data
sheets (MSDS) for safety protocols.
Clean the sensor when unexpected increases or decreases in flow or level trends occur and after
use in sandy or muddy waterways.
For heavy contamination, soak the sensor in clear water for a few minutes to help make the
contamination easy to remove.
Disconnect the sensor from the meter before it is cleaned. Use only solutions listed as acceptable in
Table 3 to clean the sensor. For sensors with a pressure cell (i.e., velocity plus depth sensors), make
sure the holes for the pressure cell chambers are washed out and clear of contamination. Rinse the
sensor with clean water before re-attaching the sensor to the assembly.
Table 3 Acceptable and unacceptable cleaning solutions
Acceptable
Dish detergent and water
Window cleaner
Isopropyl alcohol
Clean the meter
1. Push the power button to de-energize the meter.
2. Use a clean, moist cloth to clean the meter exterior. Mix the water with a mild detergent if
necessary.
3. Dry the meter exterior with a clean cloth. Let the meter dry in air completely before it is energized
again.
Note: Do not use paper-based cloths to clean the display. This type of cloth can cause damage to the display
screen.
measurements. The meter divides the cross-section into evenly spaced distances
between the station verticals.
the more commonly used option as it lets the operator include obstructions and other
restrictions in the cross section.
W A R N I N G
Diagnostics
Do not use
Concentrated bleach
Kerosene
Gasoline
Aromatic hydrocarbons
on page 19.
English 17