Appendix b - probe deployment – Hanna Instruments HI 9829 User Manual

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General Guidelines for fixed installation

General Guidelines for fixed installation:
• Select a water-sampling site that will allow collection of representative water

samples.

• Position the probe so the sensor surfaces face toward the flow. This will

minimize air bubble or fluid cavitation. Limit flow rate to moderate

• Mount Probe 0 to 45° angle from vertical to avoid sensors (pH, pH/ORP,

ISE) from becoming electrically discontinuous due to internal electrolytes
flowing away from their internal cells.

• Install meter or probe where they will be accessible for maintenance as

required.

• Regularly visit water sampling sites to: check for damage to sensors, the

installation mountings, and the probe/meter battery power.

• Remove aquatic weed growth that may be interfering with water sample

collection.

• Set up devices and programs for water monitoring and sampling.
• If the probe is suspended from a pier or bridge ensure that it is protected

from debris by positioning behind a support and anchoring the cable /probe

to a pipe.

• Have access to spare sensors and proper range standard solutions or

buffers.

• Strictly follow the established SOP’s.
• Download data to a laptop computer or meter on site.
• Protect probe and sensors from excessive sunlight.
• Flow cell installation; Avoid trapped air. Maintain constant flow rate.

APPENDIX B - PROBE DEPLOYMENT