Recommended Cleaning Of The 5X00 And Accessories; Storage; Short Term Storage; Long Term Storage 5420, 5421 And 5422 - YSI MultiDO 5400 User Manual

Figure 6.2
4. Remove and dispose of the membrane and its O-Ring as shown above.
5. Using a toothbrush, dish washing powder, and clean water, clean the cath-
ode, anode, and plastic between them. Rinse all components thoroughly.
6. In order, install a new O-Ring into the lower body, then a new membrane,
and then the spacer. Using the Membrane Tool, screw the Membrane
Lock on top of the spacer as shown in the figure on previous page.
7. Inspect the membrane for wrinkles. Replace if it is wrinkled.
8. Pour some water into the lower body and look for leakage around the
membrane. Replace the membrane if there is leakage. If no leakage,
dispose of the water.
9. Fill the lower body to its rim with fresh electrolyte as shown.
10. Screw the lower body onto the upper body. Excess electrolyte will leak
out at the joint between the sensor's lower and upper body.
Note - Perform a calibration after cleaning and installing a new membrane with
fresh electrolyte.
Maintenance
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214
Recommended Cleaning of the 5X00 and Accesso-
ries
Clean the 5X00 monitor and accessories as needed. Dampen a cloth with warm
water and wipe the outside of the unit. You may use mild detergent with water if
necessary. Do not use acid-based, alkali-based, or other organic solvent-based
solvents (e.g., acetone, alcohol, etc.).

Storage

Proper storage between periods of usage will not only extend the life of the sensors,
but will also ensure that the unit will be ready to use as quickly as possible for your
next application.

Short Term Storage

Short term storage is defined as a period of time < 30 days. For short term storage,
it is important to keep the sensor in a moist environment without actually immers-
ing it in liquid.
For short term storage, place the 5422 and 626250 probes in the calibration/storage
sleeve containing a moist sponge. For the 5420 or 5421 sensor, place the sensor in
a cup containing a small amount (~1/8 inch (3 mm)) of water.

Long Term Storage 5420, 5421 and 5422

Long term storage is defined as a period of time > 30 days.
The DO sensor should be stored dry with a dry membrane installed to protect it
dust, dirt, and grit.
1. Remove the used membrane.
2. Rinse the DO sensor with distilled or deionized water.
3. Dry the DO sensor and install a new, dry membrane cap.
Maintenance
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215