258 Rockwell Automation Publication 1444-UM001D-EN-P - June 2018
Chapter 10 Operate the Module
Bias Level Fault Detection
For most sensors, when operating normally the bias level of the sensor is at an
expected level that falls within the default bias limits shown in the following
table.
Measurement Type Sensor Type Default Sensor Power Default Bias Limits*
Name Index Low Limit High Limit
absolute vibration (A to A) 84 Accelerometer 24V DC, 4 mA 6 18
absolute vibration (A to V) 85 Accelerometer 24V DC, 4 mA 6 18
absolute vibration (A to D) 86 Accelerometer 24V DC, 4 mA 6 18
20 kHz absolute vibration (A to A) 160 Accelerometer 24V DC, 4 mA 6 18
20 kHz absolute vibration (A to V) 161 Accelerometer 24V DC, 4 mA 6 18
40 kHz absolute vibration (A to A) 225 Accelerometer 24V DC, 4 mA 6 18
40 kHz absolute vibration (A to V) 226 Accelerometer 24V DC, 4 mA 6 18
gSE 227 Accelerometer 24V DC, 4 mA 6 18
Position 6 Eddy Current Probe -24 V DC, 25 mA -14 -8
Rod Drop 7 Eddy Current Probe -24 V DC, 25 mA -14 -8
Eccentricity 79 Eddy Current Probe -24 V DC, 25 mA -14 -8
X (shaft relative) 81 Eddy Current Probe -24 V DC, 25 mA -14 -8
Y (shaft relative) 82 Eddy Current Probe -24 V DC, 25 mA -14 -8
Comp. Differential Exp. A (Axial) 193 Eddy Current Probe -24 V DC, 25 mA -14 -8
Comp. Differential Exp. B (Axial) 194 Eddy Current Probe -24 V DC, 25 mA -14 -8
Comp. Differential Exp. A (Radial) 195 Eddy Current Probe -24 V DC, 25 mA -14 -8
Comp. Differential Exp. B (Radial) 196 Eddy Current Probe -24 V DC, 25 mA -14 -8
Shaft Relative (LH/HP) filtered 198 Eddy Current Probe -24 V DC, 25 mA -14 -8
X (shaft relative) - Filtered 77 Eddy Current Probe -24 V DC, 25 mA -14 -8
Y (shaft relative) - Filtered 78 Eddy Current Probe -24 V DC, 25 mA -14 -8
Aeroderivative (AV to D) 83 Integrating Accelerometer 24V DC, 4 mA 6 18
absolute vibration (AV to V) 87 Integrating Accelerometer 24V DC, 4 mA 6 18
absolute vibration (AV to D) 88 Integrating Accelerometer 24V DC, 4 mA 6 18
Aeroderivative (AV to V) 80 Integrating Accelerometer 24V DC, 4 mA 6 18
Dynamic Pressure 93 Pressure Transducer 4V DC, 4 mA -1 1
DC Current 4 Proportional Signal Off -1 1
DC Voltage 5 Proportional Signal Off -1 1
AC Current 95 Proportional Signal Off -1 1
AC Voltage 96 Proportional Signal Off -1 1
absolute vibration (V to V) 89 Velocimeter Off 6 18
absolute vibrations (V to D) 90 Velocimeter Off 6 18
*Bias levels assume that the sensor is powered as shown. If the sensor is not powered as shown, then the observed bias level can be different.
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