Hach-Lange SD900 User Manual - Manual (Page 37)

D A N G E R
Electrocution hazard. Remove power from the instrument before doing maintenance or service
activities.
W A R N I N G
Biohazard exposure. Obey safe handling protocols during contact with sample bottles and sampler
components.
W A R N I N G
Multiple hazards. The technician must make sure that the equipment operates safely and correctly
after maintenance procedures.
Clean the instrument
C A U T I O N
Fire hazard. Do not use flammable agents to clean the instrument.
N O T I C E
Do not clean the controller compartment heater with liquids of any kind.
If water is not sufficient to clean the controller and the pump, disconnect the controller and move the
controller away from the sampler. Allow sufficient time for the controller and pump to dry before the
parts are re-installed and put back into service.
Clean the sampler as follows:
• Sampler enclosure—Clean the internal and external surfaces with a damp cloth and a mild
detergent. Do not use abrasive cleaners or solvents.
• Sample bottles—Clean the bottles with a brush and water and a mild detergent. Rinse with fresh
water and then with distilled water. Use an autoclave to clean glass bottles if necessary.
Replace the desiccant
A desiccant cartridge in the controller absorbs moisture and prevents corrosion. Monitor the
desiccant color through the window (
Figure 16 ). Fresh desiccant is yellow. When the color is green,
replace the desiccant.
1. Unscrew and remove the desiccant cartridge ( Figure 16 ).
2. Remove the plug and discard the spent desiccant.
3. Fill the desiccant tube with fresh desiccant.
4. Install the plug.
5. Apply grease to the O-ring.
6. Install the desiccant tube in the controller.
English 35