8.3.2.8 YVIB Firmware Changes
The following is a list of changes made to the YVIBS1B with firmware V05.01 and later.
• VibProx-KPH is renamed to VibProx-KPH1, to reflect that it uses KPH1 as source for 1x/2x tracking filters.
• LM Accelerometers are supported for Inputs 4-8, without computation of LM Tracking Filters.
• LM Tracking Filter refactored as -36 dB/oct Butterworth Filters.
• LM 1x Tracking Filters are recomputed as 6-pole filters with the correct cutoff points.
• ToolboxST Component Editor, Tab ‘Gap 9-12’ is renamed ‘Gap 9-11’ to reflect GAP12_POS4 becoming a possible
Keyphasor input.
• New Parameters added to configure CDM Sensors.
• N28 Low power now affects Velomitor and CDM Bently Nevada Charge Amp health.
• Sensor out of range and Open circuit conditions hold input health low for 3 seconds after recovery.
• Default Sensor Gains and Offsets are changed, as an example: Prox biasing is -9 V dc by default, not -10 V dc. This is
because the default bias value of 9 has been optimized for signal input range of +1 to -19 volts instead of optimizing for
the actual BN sensor 50 ml setting.
• YVIB does not support mixed TMR module operation with YVIBS1Bs
8.3.2.9 YVIBS1B Firmware Enhancements
The following is a list of functional improvements made to the newer versions of YVIB.
• LM Tracking Filters are computed for Velomitor, Seismic, and CDM sensors for inputs 1-3 in the S1B only.
• Wideband Filters support 10-Pole Filters in the SIB only.
• Input passband increased from 1150 Hz to 4500 Hz with S1B only.
8.3.3 Vibration Monitoring Application Examples
The YVIB module supports a variety of sensor types and applications. Refer to the tables Supported Sensor Inputs and Signal
Space Inputs for Sensor Types for the relevant I/O pack for valid sensor inputs and modes.
8.3.3.1 Position
Inputs 1-13 support Proximitor sensors to collect air gap value. In Heavy Duty turbine applications, Proximitors are used to
monitor the position of a rotating shaft. Position algorithms report a filtered air gap value.
Input Processing
The signal space values GAPn_VIBn, GAPn_POSy, GAPn_KPH# are the filtered engineering units (EU) values.
Gap values are filtered through a 2-pole, low-pass filter with a fixed cutoff frequency of 8 Hz. The output of the gap filter is
passed through a rolling average filter prior to scaling. Gap Values are converted from Volts to EU. For Position applications,
Gap values have a Scale Offset parameter Scale_Off applied after scaling.
Gap
Filter
Mvg
Avg
Filter
A/B A - B
A A
B
V
GAP
V
FILT
EU
GAP
GAPn_POSy
Scale(V/EU)
V
PROX
B
Scale Offset(EU)
GAPn_KPH#
GAPn_VIBn
In this application example, SysLim1GAPn, SysLim2GAPn provide System Limit status for GAPn_VIBn value as
True/False.
YVIB Vibration Monitor Modules GEH-6855_Vol_II System Guide 243
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