Hach TU5200 Manuel D'utilisation De Base page 21

Clean the instrument
Clean the exterior of the instrument with a moist cloth, and then wipe the instrument dry.
Clean a sample vial
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 sample vial when there is contamination in the sample vial after the sample vial is rinsed.
Items to collect:
• Hydrochloric acid (concentration 10%)
• Laboratory cleaning detergent for glass (concentration 0.1%)
• Distilled or deonized water
• Dilution water
• Vial wiper (optional)
• No-lint cloth
1. Put the exterior and interior surfaces of the sample vial and the cap in 10% hydrochloric acid for
15 minutes.
2. Clean the exterior and interior surfaces of the sample vial and the cap with laboratory cleaning
detergent for glass (concentration 0.1%).
3. Fully rinse the sample vial three times with distilled or deionized water.
Note: If the sample vial is used to measure low range turbidity samples or dilution water, rinse with dilution
water (not distilled or deionized water).
4. For the best results, clean the sample vial with the optional vial wiper. Then fully rinse the sample
vial again. Refer to
5. Dry the external surfaces of the sample cell with a soft, no-lint cloth. Do not let the sample vial air
dry.
6. For storage, fill the sample vial with distilled or demineralized water.
Note: If the sample vial is used to measure low range turbidity samples or dilution water, fill the sample vial with
dilution water (not distilled or deionized water).
7. Immediately put the cap on the sample vial to keep the interior of the sample vial wet.
C A U T I O N
Figure 5.
English 21