Appendix:
This version of the Hydrion10 contains Smart-Sensors inside the Sensor-unit. The body of a Smart-Sensor
functions as a mini data logger that contains calibration data that is used by the PC to convert the raw
data into accurate measurement data. To check the Smart-Sensor data inside the Sensor-unit, a special
monitoring program scans them at the start of each measurement session.
Smart-Sensor data check Application
Most important functions:
• ‘R’: If a sensor is unplugged while the meter is still working, press ‘r’.
• ’C’: If everything is working well, this gives a status report of the most important sensors.
• ‘Q’: Exit
Guidelines for the Replacement of Sensors and Sensor caps
Aside from the temperature and EC sensor, all other sensors have a limited lifespan. The life expectancy
of ISE (Ion Selective Electrode) sensors varies from 4 months to over 24 months. Although the pH sensor
is a Smart-Sensor and also an ISE, its has no replaceable cap and must be replaced completely. The
CO2 gas sensor is a Smart-Sensor with a replaceable cap, but it is not an ISE. Replacement of the
electrolyte and its cap is more complicated. This sensor can not be pulled out of the Sensor-unit as
described below.
A Smart ISE Sensor consists of a body containing electronics, some electrolyte fluid and a sensor cap
with an ion-selective membrane. All the ISE sensors have replaceable sensor caps. All Smart-Sensors
(except the CO2 gas sensor) can easily be replaced from the Sensor-unit with a sensor puller. After
extracting the sensor from the unit one can remove the cap. This allows you to replace the inner
electrolyte fluid and place a new cap onto it.
The complete Smart-Sensor can also be replaced, if that is more convenient. Smart-Sensors contain the
most recent calibration data, so a factory delivered Smart-Sensor is immediately ready for use.
Replacement of a Smart-Sensor should only be done by certified personnel or a Hydrion distributor.
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