Endress+Hauser iTEMP TMT85, Руководство по эксплуатации

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Operation via FOUNDATION Fieldbus TM
iTEMP TMT85
78 Hauser
The units displayed are selected with the PRIMARY_VALUE_UNIT and SENSOR_ RANGE
→ UNITS_INDEX parameters. It must be ensured that the selected units physically suit the
measured variables.
The Sensor 1 and 2 Transducer Blocks each provide the "Quick Setup" wizard for the
quick and safe configuration of the measurement settings.
A sensor error adjustment can be performed with the sensor offset function. Here, the
difference between the reference temperature (target value) and the measured
temperature (actual value) is determined and entered in the SENSOR_OFFSET parameter.
This results in a parallel shift of the standard sensor characteristic and an adjustment
between the target value and actual value.
1
2
A0042926
 20 Sensor offset
X Offset
1 Sensor characteristic with offset setting
2 Standard sensor characteristic
The Sensor 1 and 2 Transducer Blocks also allow users to linearize any sensor type by
entering polynomial coefficients. The design provides for three types of linearization:
Linear scaling of temperature-linear curve:
The complete measuring point ( sensor) can be adapted to the desired process
using linear scaling (offset and slope). It is necessary to run through the following
procedure for this purpose:
1. Switch the setting for the SENSOR_CAL_METHOD parameter to "user trim standard
calibration". Then apply the lowest process value to be expected (e.g. -10 °C) to the
sensor of the device. This value is then entered in the CAL_POINT_LO parameter.
Make sure that the status for SENSOR_VALUE is "Good".
2. Now apply the highest process value to be expected (e.g. 120 °C) to the sensor, again
ensure the status is "Good" and enter the value in the CAL_POINT_HI parameter. The
device now shows precisely the specified process value at the two calibrated points.
The curve follows a straight line between the points.
3. The SENSOR_CAL_LOC, SENSOR_CAL_DATE and SENSOR_CAL_WHO parameters
are available to track the sensor calibration. The place, date and time of calibration
can be entered here along with the name of the person responsible for the
calibration.
4. To undo sensor input calibration, set the SENSOR_CAL_METHOD parameter to
"factory trim standard calibration".
Menu guidance via the "User Sensor Trim" wizard is available for linear scaling. The
"Factory Trim Settings" wizard can be used to reset the scaling.