YSI ProDSS Meter Calibration and Maintenance
K:\Streamkeepers\Monitoring\Eqpt & supplies\Calibration-Maintenance\SOPs\YSI ProDSS maint-
cal SOP's
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SENSOR STORAGE
There are two ways to store the YSI ProDSS: short term, and long term. Only use the Short Term
Storage procedures if the unit and its sensors will be stored for 4 weeks or less. If the unit will be
stored for over a month, use the Long Term Storage procedures described below.
Short Term Storage –
Storage time
≤
4 weeks
When in regular field use or for the duration of the monitoring quarter, all sensors should remain
installed on the bulkhead. All sensors should remain in a water-saturated air environment (this
especially applies to the DO sensor cap) except for turbidity, which can be stored in a dry
environment if stored separate. However, for ease of use and to reduce damage to sensors during
removal, keep all sensors on the bulkhead and in a water-saturated air environment during short term
storage.
•
Place approximately 0.5 in (1 cm) of any water (deionized, distilled or environmental) in
calibration cup. Install the calibration cup on the bulkhead and firmly tighten to prevent
evaporation.
•
Secure the whole unit in its designated location in the office
Long Term Storage
– Storage time > 4 weeks
At the end of each monitoring session, the ProDSS should be broken down so that the individual
sensors can be stored more securely and under their own individual proper storing conditions.
Storage caps can be found in the individual storage boxes of each sensor, do not lose these caps.
The following are a few guidelines to removing and storing the sensors:
1.
Remove and store each sensor individually, do not remove them all at once and then store each
sensor. This can cause situations where the sensors are not secure and could be dropped and
damaged.
2.
Make sure each sensor is clean and/or dry before long term storage. Se the
Maintenance
section
above for proper cleaning/drying techniques.
3.
Always be aware of the sensor connector ends, and the bulkhead ports. DO NOT get water into
these connectors, if you do always dry before connecting or turning on the instrument. Get help
from staff if you get a connector end wet.
4.
Confirm via the post check sheet that all parameters on the ProDSS have undergone their post
check procedures after a monitoring session. If a parameter has not undergone post check,
inform the staff.
Conductivity
1.
Loosen the retaining nut on the sensor using the removal tool, use fingers to finish removing the
retaining nut from the bulkhead.
2.
Remove the sensor from the bulkhead. Inspect the tip for dirt or debris, if it warrants cleaning,
see the
Maintenance
section above for proper cleaning techniques. Take care to not get the
exposed sensor connector end wet.
3.
Pat the sensor dry with Kimwipes or a lint-free, non-abrasive cloth.
4.
Place the red cap onto the sensor connector end.
5.
Place the sensor into its designated long term storage container.
