Hach DR2400, Manual

Page: 51 / 66

Maintenance
5940018Maintain.fm
Page 51
Section 8 Maintenance
8.1 Caring for the Instrument
•
Use the tip of a finger or fingernail, the non-writing end of a pen or pencil, or
a stylus to prevent scratches on the touchscreen. Avoid using a pen point,
pencil point, or other sharp object on the surface of the touchscreen.
•
The touchscreen is water-resistant, but should not be exposed to direct rain
or moisture. In general, treat the instrument with the same care as other
electronic equipment.
•
The touchscreen contains a glass element. Protect the touchscreen against
strong impacts.
•
Protect the instrument from temperature extremes, including heaters, direct
sunlight, and other heat sources.
•
Do not store or use the instrument in any location that is extremely dusty,
damp, or wet.
8.2 Cleaning the Instrument
Use a soft, damp cotton cloth to wipe the instrument and the touchscreen. If the
surface of the touchscreen becomes soiled, clean it with a soft cloth and diluted
window cleaning solution. Do not use strong solvents.
8.3 Replacing the Lamp Module
The light sources in the DR/2400 were designed to provide years of reliable use.
In the event that the Lamp Module becomes damaged or burned out, a
replacement unit may be ordered (Cat. No. 59456-00). Installation instructions
are included with the replacement module (Cat. No. 59456-88).
To determine whether the module needs replacing, or to get help replacing it,
contact the Hach Service Department. In the United States, call 1-800-227-4224.
Outside the United States, contact the Hach office or nearest dealer. See
Repair
Service on page 63 for more contact information.
8.4 Sample Cell Maintenance
Glass —
Clean glass cells with detergent and water. Rinse the cells several
times with tap water, and then rinse thoroughly with deionized water. Rinse
sample cells containing organic solvents (chloroform, benzene, toluene, etc.)
with acetone before the detergent wash, and again as a final rinse before drying.
Note: Some cells may require acid washing or other special cleaning procedures.
Polystyrene —
Wash polystyrene sample cells with soap and water and rinse
thoroughly with tap water. Do not use organic solvents to clean polystyrene
sample cells.
8.5 Pour-thru Cell Maintenance
See Cleaning the Pour-Thru Cell on page 30 .
8.6 Alkaline Battery Replacement
The DR/2400 uses 3 D-cell alkaline batteries for field power. When the
instrument indicates low batteries, see
Changing the Batteries on page 14 for
instructions regarding battery replacement.