Hach Ultra ORBISPHERE 3658, Operator'S Quick Manual

Page: 14 / 16

Page 14
Sensor Maintenance (cont)
Insert the installation tool inside the guiding sleeve.
Push the installation tool firmly downwards. This clasps the
mounting ring onto the sensor head, folding the membrane
over the sensor tip.
Remove the installation tool and guiding sleeve.
Visually check for correct ring placement, try to push it down
with your fingers.
Check that the membrane is tight, with no wrinkles.
Note :
Once installed, a membrane cannot be reused. Avoid touching
membranes with bare fingers, as this may affect its sensitivity.
Clean and dry the protection cap ready for installation.
Replace the O-ring inside the protection cap with a new one.
Tighten the protection cap finger tight.
Then, complete the process using the tool provided in the
maintenance kit. Insert into each of the four holes in turn, and
tighten as far as possible. Tighten each hole only once.
Note :
The grille inside the protection cap should be free to move
during tightening. Therefore, and to avoid damage to the
membrane, do not touch the grille during the tightening
process.
Finally replace the flow chamber, by gently lowering it onto the
sensor and guiding the thermistor and purge gas air duct on the
sensor into the two holes in the flow chamber base. Turn the
flow chamber locking nut clockwise to secure it in place.
Check that the membrane has not been damaged. The alarm
message
[Err]
will be displayed on your analyzer if the
membrane leaks in any way.