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Section 6 Maintenance
DANGER
Only qualified personnel should conduct the maintenance tasks described in this
section of the manual.
To ensure continued and reliable operation of the water quality monitoring system, we
recommend scheduling a thorough and regular maintenance program. To determine the
appropriate maintenance intervals required for a deployment site, periodically conduct a
visual inspection of the equipment and sensors, compare the pre- and post-calibration
results, and monitor the sensor response time.
A contaminated, worn-out, or damaged sensor will not produce reliable readings. It is
recommended to service all sensors and allow them to equilibrate in tap water overnight
before calibration.
Maintenance kits are available for the DS5, DS5X, and MS5. See Replacement Parts and
Accessories on page 47.
6.1 Multiprobe and Accessory Maintenance
6.1.1 Cleaning the Multiprobe Housing
Clean the outside of the multiprobe housing using a clean brush, soap, and water. Always
use the DS storage cup or the MS cup (filled with one inch of tap water) to protect the
sensors from damage, and especially from drying out, whenever the multiprobe is not
deployed.
Do not expose equipment to extreme temperatures below 1 °C (34 °F) or above
50 °C (122 °F).
Always rinse the multiprobe with clean tap water soon after returning from deployment.
6.1.2 Dryer Maintenance
Important Note: Do not submerge the dryer in water.
The in-line vented level dryer is a part of the cable and penetrator assembly, if the Sonde
has the vented depth sensor (0–10 meters).
The GORE-TEX
®
patch (round patch on dryer) allows gases to come into the dryer and is
splash proof, but not submersible. Any water leaks inside the dryer can block the tube
which goes into the multiprobe. If water leaks are detected, contact Technical Support.
The dryer contains desiccant bag(s) (white bag) to keep condensation from forming
inside the vented tube which goes from the dryer to the multiprobe. If moisture is detected
inside the dryer, replace the bags (Figure 14).
To replace the desiccant bag(s):
1. Unscrew both dryer nuts and unscrew the dryer cap.
2. Inspect the indicator strip. If the stripe is dark blue, the bag does not need
replacement. If the stripe is light pink or purple, remove, discard, and replace the
old bag.
3. Reassemble the dryer.
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