AMI Oxytrace QED
Maintenance
A-96.250.531 / 300617 41
6. Maintenance
Maintenance frequency depends strongly on the water quality. The
AMI Oxytrace QED is designed for determination of low level of dis-
solved oxygen in high purity water.
It is not suitable for the measurement of dissolved oxygen in waste
water.
6.1. Maintenance Table
*A change of membrane and electrolyte is recommended:
if indicated in the maintenance list (remaining amount <10%)
if the response of the sensor is slow
if the sensor can not be calibrated any more and/or the instru-
ment shows a corresponding error message
if the sensor signal is very unstable.
6.2. Stop of Operation for Maintenance
1 Shut off power of the instrument.
2 Stop sample flow by closing the flow regulating valve.
Weekly Check sample flow.
Monthly If necessary, perform an air calibration.
Half-yearly Clean Oxytrace G membrane with a soft tissue,
see Maintenance of the Oxygen Sensor, p. 42.
Clean faraday electrode, see Maintenance of the
Faraday electrode, p. 45
Yearly If necessary, replace filling electrolyte.
If the sensor is exposed to air
frequently and during long time intervals, the
electrolyte and membrane may have to be
changed earlier (see below*).
Clean flow cell and flow meter, if dirty.
Every 2nd
year
Replace Swansensor Oxytrace G membrane by
using a new, pre filled sensor cap.
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