TC sensorsFor TC sensor installation, servicing and maintenance ensure you follow the instructions in the TCSensor Installation and Maintenance manual that was supplied with the instrument. Pay particularattention to the installation and connection of the purge gas supply.N O T I C EDo not place the TC sensor into a liquid sample until a constant supply of dry purge gas has been connected, asliquid could condense inside the measuring chamber and cause damage to the thermal conductor chip.To ensure the continuation of purge gas while the sensor is in contact with the sample, it is highlyrecommended to use a backup purge gas cylinder with an automatic changeover valve that activateswhen the first cylinder is empty.The use of an ORBISPHERE Model 29089 gas regulator (or similar) is also recommended to delivera constant, pressure regulated supply of dry purge gas to the sensor, filtered to 40 μm.In addition, and to prevent any damage to the sensor electronics, the use of a purge safety backupunit (ORBISPHERE Model 32605) is highly recommended to ensure the supply of purge gas remainsuninterrupted to the sensor in the event of a mains power outage.The above ORBISPHERE accessories are explained in more detail in the TC Sensor Installationand Maintenance manual.User interfaceInstrument controlsThe instrument front panel provides:• A touch screen acting as display, touch pad and keyboard.• A LED, showing when the instrument is on.Turning instrument On and OffThere is no power switch on the instrument. The mains must be disconnected to turn the instrumentoff.Measurement windowThe main (numeric) measurement window continuously displays:• Sensor measured values• Measured sensor trends (for the last 10 minute to last hour)• Measured sensor data alarm limits and other events• TemperatureTouch screenThe user interface on the front panel is a touch screen providing easy selection through menus. Allthe measurement, configuration, calibration and standard service routines can be called by pressingbuttons and menu bars on screen.The display can be configured to only show a sensor measurement, or to show a parameterizedgraphic representation of the last measurements.English 13