Hach SP-51 Manual Básico Del Usuario página 19

9.2 Clean the instrument
Clean the exterior of the instrument with a moist cloth and a mild soap solution and then wipe the
instrument dry as necessary.
9.3 Clean the instrument interior
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.
Refer to the MSDS for instructions to safely clean reagent spills and leaks. Obey all local and federal
regulations to dispose of cleaning materials.
9.4 Clean spills
Chemical exposure hazard. Dispose of chemicals and wastes in accordance with local,
regional and national regulations.
1. Obey all facility safety protocols for spill control.
2. Discard the waste according to applicable regulations.
9.5 Replace the reagent
Chemical exposure hazard. Dispose of chemicals and wastes in accordance with local,
regional and national regulations.
Note: Do not pour the remaining reagent into new bottles.
One 500-mL bottle of each buffer and indicator solution can be used for approximately 2 months.
1. Discard the old containers with remaining contents in compliance with MSDS and regulatory
requirements.
2. Install the new bottles. Refer to
solution on page 15.
9.6 Change the alarm trip point
Install the applicable buffer and indicator solution to change the alarm trip point to a different
hardness level. Let the instrument operate for 2 hours to purge the used reagents. Calibrate the
instrument again. Refer to
9.7 Replace the pump tubes
Over a period of time, the clamping action of the pump/valve module will soften the tubing. This
causes the tubing to break and prevents liquid flow. Leaks can occur. The tubing wear is increased at
high temperatures. Therefore, the pump tube replacement schedules are based on the ambient
operating temperature. Refer to
Refer to the documentation supplied with the maintenance kit.
C A U T I O N
C A U T I O N
C A U T I O N
Install the buffer solution
Trip point specifications
Maintenance schedule
on page 15 and
on page 4 and to Calibration
on page 18 for the maintenance interval.
Install the indicator
on page 17.
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