ID

This value is generated automatically by the database and cannot be changed.

Order

This value indicates the order of the display within the same level of the plant tree.

Name

The name of the asset (e.g. plant, aggregate group, aggregate, etc.) can be changed here.

Comment

The Comment field is used to enter comments about an asset. The input field can be enlarged by dragging (bottom right).

Type

Select the corresponding type for the sensor output. For IEPE sensors, the type cannot be changed.

The following sensor types exist:

  • Analog Standard: Select this setting if none of the other analog types is applicable. In this case, you will have to adjust the Range Min and Range Max values on the Sensor data tab, e.g. Min and Max values for a distance sensor.

  • Analog Current ±20mA

  • Analog Current 0-20mA

  • Analog Current 4-20mA

  • Analog ibaNET 750: Analog signal read by a central unit for distributed I/O like ibaNet750-BM or ibaNet750-BM-D using fiber optics (e.g. temperature signal).

  • Analog IEPE: Vibration sensor with integrated charge amplifier (also known as ICP or Piezo sensors)

  • Analog Voltage ±10V

  • Analog Voltage ±24V

  • Analog Voltage 0-10V

  • Digital 0-24V: 24V HTL level digital signal, e.g. connected to one of the digital inputs on the CMU.

  • Digital ibaNET 750: Digital signal read by an ibaNET750 field bus coupler using fiber optics.

  • Digital rpm: Digital sensor used for speed measurement (e.g. inductive proximity switch).

Orientation

The following options are possible here:

  • Axial

  • Horizontal

  • Radial

  • Vertical

Note:

This parameter is only relevant for vibration sensors.

Serial number

Enter the serial number of the sensor here.

Aggregate

This field shows the aggregate association of the sensor. The value is automatically adopted when the sensor is dragged to an aggregate in the plant tree. It is NOT possible to assign the sensor to a different aggregate.

Trend filter

If a sensor is to be assigned to a trend filter, the trend filter group has to have been created first.

See also chapter Filtered trends.

Sensor check

If the sensor check is enabled, the sensor is checked for sensor defects. The parameters for the sensor check can be set in the sensor data.

Sensor data

On the Sensor data tab, you can configure additional parameters, which depend on the type of sensor selected. By default, most sensors have the Range Min and Range Max parameters, corresponding to the physical value at the minimum and maximum output signal level. The required values can normally be found on the data sheet for the sensor or in the calibration certificate for vibration sensors.

Example

Let us assume that an inductive displacement sensor (M18 size) is selected and has an output signal level of 4-20 mA. Its linear measurement range is between 1 mm and 5 mm. Therefore, “1” should be entered for Range Min and “5” for Range Max. In addition, the sensor type has to be set to Analog Current 4-20 mA on the General tab. A vibration sensor is different as the Sensitivity and Bias voltage parameters also exist. You can find these in the sensor’s calibration certificate.

Overview of sensor parameters

Bias voltage

This parameter only exists for vibration sensors and specifies the bias offset voltage of the internal charge amplifier. It is not used for scaling the measured value, but is used as a diagnostic feature for the function of the sensor and is significant here for documentation (the value can be found on the sensor’s calibration certificate).

Sensitivity

The Sensitivity parameter specifies the sensitivity of the sensor in the unit [mV / Unit]. The sensitivity of the sensor is specified in the data sheet supplied by the manufacturer.

Constant RPM

Select this parameter for an aggregate with a fixed shaft speed, e.g. if the motor is not frequency regulated (no frequency inverter). The fixed shaft speed value is specified in revolutions per minute [rpm]. To assign the constant shaft speed to a component group, drag the vibration sensor (Analog IEPE type) to the speed sensor field for the component group (tab: Ratios).

Range Max

Value in the physical unit that the sensor supplies at maximum output voltage or maximum output current (only relevant for analog sensors)

Range Min

Value in the physical unit that the sensor supplies at minimum output voltage or minimum output current (only relevant for analog sensors)

Switch flag

Number of switch flags on the circumference of a shaft, e.g. if using an inductive proximity switch for speed measurement.

Check Max

This value is specified as a factor 0-1 (= 0-100%) of Range Max. If this value is exceeded, the sensor is no longer calculated. This prevents bad data being calculated due to a sensor defect.

Typical values:

  • IEPE sensor: 0.95

  • PT100: 849 (850 = cable break)

Check Min

This value is specified as a factor 0-1 (= 0-100%) of Range Min. If the value falls below this, the sensor is no longer calculated. This prevents bad data being calculated due to a sensor defect.

Typical values:

  • IEPE sensor: 0.95

Check Velocity Ratio

This value is specified as the quotient of the maximum to the minimum speed occurring and can only be used with IEPE sensors. If the value is reached or exceeded, this sensor is no longer calculated. This can prevent bad data being calculated due to transient overmodulation or oscillation.

Typical value: 7