Range selection
The 04 record on Bently Nevada 990-04-70-01-01 / 990-10-70-03-00 is 0–4 mil pp, while the 10 record is 0–10 mil pp.
Bently Nevada · Machinery Monitoring HardwareMoore Automation · Technical Record
Bently Nevada · 990 Vibration Transmitter
Bently Nevada 990-04-70-01-01 / 990-10-70-03-00
| 990 Vibration Transmitter
4–20 MA LOOP · 3300 NSV INPUT · 7 M SYSTEM LENGTH
Complete model · 990-04-70-01-01 / 990-10-70-03-00
01
Model Overview
Bently Nevada 990-04-70-01-01 / 990-10-70-03-00 is a pair of 990 Vibration Transmitter order strings for a two-wire, loop-powered 4–20 mA signal path. The first record selects a 0–4 mil peak-to-peak range with DIN-rail mounting and CSA Division 2 approval; the second selects 0–10 mil, DIN plus bulkhead mounting and no approval.
Each Bently Nevada 990-04-70-01-01 / 990-10-70-03-00 accepts the matched 3300 NSv probe and extension-cable signal, conditions the vibration amplitude and presents the result to the control-system current loop. Both records retain a 7.0 m system-length field.
The two exact Bently Nevada 990-04-70-01-01 / 990-10-70-03-00 suffix sets must not be combined into one range. Their full-scale, mounting and approval fields change the installed transmitter configuration.
02
Technical Specifications
- Brand
- Bently Nevada
- Complete models
- 990-04-70-01-01 / 990-10-70-03-00
- Product type
- 990 vibration transmitter
- Input system
- 3300 NSv proximity transducer
- Output
- Two-wire 4–20 mA
- Supply
- +12 to +35 Vdc
- System length
- 70 = 7.0 m
- First full scale
- 04 = 0–4 mil pp (0–100 µm pp)
- Second full scale
- 10 = 0–10 mil pp (0–250 µm pp)
- First mounting
- 01 = 35 mm DIN rail
- Second mounting
- 03 = DIN rail and bulkhead screws
- First approval
- 01 = CSA Division 2
- Second approval
- 00 = none
- Frequency response
- 5 Hz–6 kHz
- Loop accuracy
- ±1.5%
- Prox output
- 7.87 mV/µm nominal
- Failure current
- Below 3.6 mA Not OK
- Temperature
- Transmitter per 990 family rating
03
Operating Characteristics
Bently Nevada 990-04-70-01-01 / 990-10-70-03-00 converts the 3300 NSv vibration response into a proportional loop current, with the full-scale fields controlling the engineering range.
Loop behavior
The two-wire output from Bently Nevada 990-04-70-01-01 / 990-10-70-03-00 uses 4–20 mA for the selected vibration range and reports Not OK below 3.6 mA.
Response band
The 5 Hz–6 kHz frequency response connects the matched NSv transducer signal to the selected transmitter range.
04
System Integration
Bently Nevada 990-04-70-01-01 / 990-10-70-03-00 sits between the 3300 NSv probe chain and the control-system current input.
Probe input
The transmitter accepts the matched 3300 NSv probe and extension cable, with the 7.0 m system length retained in both records.
Mounting boundary
The 01 record uses DIN-rail clips; the 03 record adds bulkhead screws to the mounting arrangement.
Control output
The conditioned 4–20 mA loop from Bently Nevada 990-04-70-01-01 / 990-10-70-03-00 terminates at the control-system input, while the Prox Out remains available for diagnostics.
05
Common Questions
Why can Bently Nevada 990-04-70-01-01 / 990-10-70-03-00 give a misleading vibration reading after a transmitter change?
Bently Nevada 990-04-70-01-01 / 990-10-70-03-00 are different full-scale records: 0–4 mil peak-to-peak and 0–10 mil peak-to-peak. Loading the wrong record changes the loop scaling even when the probe and machine are unchanged.
What should be confirmed between the probe, cable and Bently Nevada 990-04-70-01-01 / 990-10-70-03-00?
Keep the 3300 NSv probe, extension cable, transmitter and 7.0 m total electrical length matched for Bently Nevada 990-04-70-01-01 / 990-10-70-03-00. A length or probe-family mismatch changes the conditioned 4–20 mA result.
How can a customer tell whether low current from Bently Nevada 990-04-70-01-01 / 990-10-70-03-00 is a Not OK indication?
A loop current below 3.6 mA from Bently Nevada 990-04-70-01-01 / 990-10-70-03-00 is the documented Not OK region. Check the probe connector, extension path and transmitter input before treating the low current as a process value.
Which mounting arrangement applies to Bently Nevada 990-04-70-01-01 / 990-10-70-03-00?
Bently Nevada 990-04-70-01-01 / 990-10-70-03-00 use different mounting records: the first uses the 35 mm DIN-rail arrangement, while the second adds the bulkhead-screw option. The cabinet fixing method must match the exact suffix record.
Why is the Prox Out useful when troubleshooting Bently Nevada 990-04-70-01-01 / 990-10-70-03-00?
The Prox Out of Bently Nevada 990-04-70-01-01 / 990-10-70-03-00 exposes the conditioned dynamic signal for a diagnostic instrument, allowing the probe path to be checked separately from the control-system loop.
What supply boundary should be checked for Bently Nevada 990-04-70-01-01 / 990-10-70-03-00?
Bently Nevada 990-04-70-01-01 / 990-10-70-03-00 is a two-wire loop-powered transmitter requiring +12 to +35 Vdc at the terminals. Insufficient loop voltage can prevent the current output from reaching its intended range.
06
Transmitter Options
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07
No related record found