Removing The Membrane - Hach ORBISPHERE 3654 User Manual

Maintenance and Troubleshooting

8.3.1 Removing the membrane

It is recommended to leave the sensor in place in the instrument when changing the membrane.
It is not necessary to remove it.
To remove the membrane, follow the steps below:
First remove the flow chamber from the sensor by turning the flow chamber locking pin (see
position in
CAUTION
A thermistor at the top of the sensor (illustrated
right) is used to measure the sample temperature.
Do not bend or damage this component by trying to
twist the flow chamber off the sensor.
Unscrew the protection cap, using the tool provided in the
maintenance kit.
CAUTION
Never remove the protection cap, unless you plan to
replace the membrane.
Pull up the membrane holding ring with the tool provided in
the maintenance kit.
Remove membrane and discard it.
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4 on page 9) counter-clockwise and gently lifting the flow chamber off the sensor.