SMAR DT302, Owner'S Operation And Maintenance Manual

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DT302 – Operation, Maintenance and Instructions Manual
3.12
To configure the Analog Input Block in offline mode, please, go to the main menu and select "Device
Offline Configuration - Analog Input Block. Using this window, the user can configure the block
mode operation, selects the channel, scales and unit for input and output value and the damping.
Figure 3.7 – AI Block – XD_SCALE Configuration
Lower and Upper Concentration/ Density Calibration
Each sensor has a characteristic curve that establishes a relation between the applied pressure, the
sensor signal and the measured concentration/density. This curve is determined for each sensor
and it is stored in a memory together with the sensor. When the sensor is connected to the
transmitter circuit, the content of its memory is made available to the microprocessor.
Sometimes the value on the transmitter display and transducer block reading may not match the
applied pressure.
The reasons may be:
•
The transmitter mounting position.
•
The user's pressure standard differs from the factory standard.
•
The transmitter had its original characterization shifted by over pressurization, over heating or
by long term drift.
The calibration is used to match the reading with the correct concentration/density.
Please, sure that the
DT302 is measuring concentration/density. Open the Transducer Block and
see the Transducer Type parameter. Please, see the following figure:
XD Scale value and unit
should be according to
Measured Type process.