Bently Nevada 990-05-70-02-00 990 Vibration Transmitter The Bently Nevada 990-05-70-02-00, also cataloged as the 990 Vibration Transmitter, operates as a...
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The Bently Nevada 990-05-70-02-00, also cataloged as the 990 Vibration Transmitter, operates as a dedicated hardware component for continuous radial vibration processing within machinery protection system platforms.
Suffix Breakdown & Model Matrix
05: Full-scale option: 0-5 mils pp (0-125 um pp)
70: System length option: 7.0 meters (23.0 feet)
02: Mounting option: Bulkhead screws
00: Agency approval option: Not required
Hardware Specifications
Parameter
Specification
Model
990-05-70-02-00
Brand
Bently Nevada
Origin
USA
Weight
0.44 kg
Dimensions
7.3 x 5 x 10 cm
OperatingTemp
-35 to +85 degC
PowerConsumption
24 VDC nominal, less than 1.0 W
Full-Scale Range
0-5 mils pp (0-125 um pp)
System Length
7.0 meters (23.0 feet)
Mounting Type
Bulkhead screws
Agency Approval
Not required
Tariff Code
8537101190
Machinery Monitoring & TSI Characteristics
The unit utilizes precise eddy-current probe scaling to translate raw proximity sensor signals into a linear 4-20 mA loop current output. Proper installation requires gap voltage validation against standard -10 VDC targets to ensure operation within the linear range of the probe assembly. To prevent signal degradation in high-density installations, the internal electronics incorporate cross-talk suppression mechanisms to isolate adjacent sensor channels from mutual inductive interference.
Frequently Asked Questions
Q: Can this transmitter be hot-swapped while the loop is powered?
A: No. The loop power must be de-energized before disconnecting or connecting the device to prevent current surges that can disrupt or damage internal components.
Q: What is the significance of the 7.0 meters system length option?
A: The internal transmitter calibration relies on a fixed electrical length. The combined length of the proximity probe and the extension cable must equal 7.0 meters to maintain correct scaling and measurement accuracy.
Field Installation Guidelines
Secure the enclosure to a rigid plate or bulkhead using the designated mounting screws to minimize mechanical resonance.
Terminate all field wiring with twisted, shielded pairs to prevent electromagnetic noise infiltration into the 4-20 mA signal.
Connect the cable shield to the instrument common ground at the control system end only; leave the field transmitter end isolated to prevent ground loops.
