Maintenance - Hach SD900 Manuel D'utilisation De Base

Verify the sample volume
To make sure that the sample volume is accurate, take a grab sample. Do not go back into
calibration to check the volume since the volume compensation is reset to zero at the start of a
calibration.
1. Push MANUAL OPERATION.
2. Select GRAB SAMPLE.
3. Put the intake tubing into the sample water.
4. Put the tubing from the outlet side of the pump into a graduated cylinder.
5. If the liquid sensor is enabled, enter the volume to be verified.
6. If the liquid sensor is disabled, enter the volume that is specified in the program.
7. Push ENTER. The pump cycle starts (purge-sample-purge).
8. Compare the volume that was collected in the graduated cylinder to the expected volume. If the
collected volume is not correct, do the volume calibration again.

Maintenance

Multiple hazards. Only qualified personnel must conduct the tasks described in this section of the
document.
Electrocution hazard. Remove power from the instrument before doing maintenance or service
activities.
Biohazard exposure. Obey safe handling protocols during contact with sample bottles and sampler
components.
Multiple hazards. The technician must make sure that the equipment operates safely and correctly
after maintenance procedures.
Clean the instrument
Fire hazard. Do not use flammable agents to clean the instrument.
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.
D A N G E R
D A N G E R
W A R N I N G
W A R N I N G
C A U T I O N
N O T I C E
English 23