Maintenance; Clean The Instrument; Clean The Sample Cells; Export The Data Log - Hach DR 900 User Manual

5. When the transfer is done, select Disconnect USB and disconnect
the USB cable.
6. Push Ok.

Export the data log

The event log and the data log can be exported to the computer. The
event log contains the date, time, event number, parameter and the
description of a configuration related action. Sample measurements are
stored manually or automatically in the data log. Refer to
advanced program options on page 11.
1. Set the instrument to on and connect the USB cable to the
instrument and to the computer.
The USB Main Menu prompts.
2. Select Export Datalog.
The instrument shows as a USB drive on the computer. Open the
folder.
3. Copy and save the export files (DR900_DataLog.csv and
DR900_EventLog.csv) to the computer.
4. Push Ok.
5. When the files are copied to the computer, select Disconnect USB
and disconnect the USB cable.
6. Push Ok.

Maintenance

W A R N I N G
Multiple hazards. Only qualified personnel must conduct the tasks
described in this section of the document.

Clean the instrument

Clean the exterior of the instrument with a moist cloth and a mild soap
solution and then wipe the instrument dry.

Clean the sample cells

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.
Select
Chemical exposure hazard. Dispose of chemicals and wastes in
accordance with local, regional and national regulations.
Most laboratory detergents are used at recommended concentrations.
Neutral detergents, such as Liquinox, are safer to use when regular
cleaning is necessary. To decrease the cleaning times, increase the
temperature or use an ultrasonic bath. To complete the cleaning, rinse a
few times with deionized water and then let the sample cell air dry.
Sample cells may also be cleaned with acid, followed by a thorough
rinse with deionized water.
Note: Always use acid to clean sample cells that were used for low-level metal
tests.
Special cleaning methods are necessary for individual procedures.
When a brush is used to clean sample cells, take extra care to avoid
scratches on the interior surfaces of the sample cells.
Replace the batteries
Explosion hazard. Expired batteries can cause hydrogen gas buildup
inside the instrument. Replace the batteries before they expire and do
not store the instrument for long periods with the batteries installed.
C A U T I O N
C A U T I O N
W A R N I N G
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