Clean The Sensor; Clean The Meter; Replace The Battery - Hach FH950 Manual Básico Del Usuario

To cancel the sleep mode, push any key. The display brightness goes back to the normal level and
all keys go back to their normal functions.
Section 7 Maintenance

7.1 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 safety data sheets
(MSDS/SDS) 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

7.2 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.

7.3 Replace the battery

Fire and explosion hazard. This equipment contains a high energy lithium battery which can ignite
and cause fire or explosion, even without power. To maintain the safety provided by the instrument
enclosure, the instrument enclosure covers must be installed and secured with the supplied
hardware.
W A R N I N G
Do not use
Concentrated bleach
Kerosene
Gasoline
Aromatic hydrocarbons
W A R N I N G
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