Sensor Installation - Hach ORBISPHERE GA2X00 O2 EC Manuel D'utilisation De Base

10. Rinse the sensor under a tap for about 5 seconds to remove any excess electrolyte, then gently
wipe with a soft tissue to ensure all parts are completely dry. Drain the overflow electrolyte from
the container into a sink and flush away. Discard the used container.
11. If not using a protection cap with grille proceed to step 12. Otherwise take a new Dacron
patch from the box of O-rings in the recharge kit. Place the mesh in the center of the protection
cap. It is very important that the mesh is in the center of the protection cap and covering the
entire grille. Lower the sensor onto the protection cap making sure not to disturb the mesh.
12. Push the protection cap firmly into place, making sure one of the four slots in the protection cap
fits over the small locking pin (highlighted right). If it is necessary to turn the protection cap to fit
over the locking pin, ensure you only turn it clockwise to avoid unscrewing the cartridge.
13. Finally, screw the protection cap locking washer back into place in a clockwise motion, and
tighten finger tight.

4.2 Sensor installation

4.2.1 Sensor positioning information
Unless the sensor is part of the ORBISPHERE equipment that includes it, the sensor must be
installed in an ORBISPHERE socket or flow chamber, that allows contact with the sample fluid to be
analyzed.
The sensor and measuring instrument are connected by a cable and two 10-pin connectors. The
standard sensor cable length is 3 meters though extension cables of up to 1000 meters are available.
However, smart sensor technology is only available with distances of up to a maximum of
750 meters.
Note: If the model 28117 pressure sensor is used, the maximum cable length is 50 meters.
Ensure that the sensor will be mounted:
• perpendicular to the pipe
• horizontal
• on a horizontal pipe section (or on flow-ascending vertical pipe)
• minimum of 15 meters away from the pump's discharge side
• in a place where the sample flow is stable and rapid, and as far as possible from:
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mesh