Recommended Fields Of Application; Measuring / Operation; General Information On The Handling Of The Sensor Cap; Commissioning - Xylem FDO 925/STM Operating Manual

Sensor cap with
memory chip
Intelligent membrane
(IQMC technology)
Automatic sensor
recognition
1.2

Recommended fields of application

 On site measurements in rivers, lakes and wastewater
 Applications in water laboratories
 BOD measurements
2

Measuring / Operation

2.1

General information on the handling of the sensor cap

Despite its exterior robustness, the sensor is a high precision optical instrument. Therefore, you should take the
following precautions when dealing with the FDO
 Please do not touch the sensor membrane with your fingers
 Avoid any great mechanical stress of the sensor membrane (pressure, scratches)
2.2

Commissioning

Scope of delivery
Preparing the sensor
for measurement
A memory chip is integrated in the sensor cap. The following data are stored
on the memory chip:
 Type designation of the sensor cap
 Series number
 Data of the factory calibration or user calibration
For each membrane, the individual calibration values are determined by a
factory calibration process and stored to the memory chip of the sensor cap,
ensuring maximum accuracy over the whole lifetime of the sensor.
The data of the sensor and sensor cap is recalled by the meter when the
sensor is connected and is used for measurement and for measured value
documentation. The calibration data are stored in the sensor cap. Thus, the
calibration is automatically retained if the sensor or meter are exchanged.
The digital transmission technique guarantees the failure-free
communication with the meter even with long connection cables.
®
925/STM:
®
 D.O. sensor FDO
 Check and storage vessel FDO
 Operating manual
Connect the sensor to the meter.
The sensor is immediately ready to measure.
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925/STM with sensor cap
®
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