The Bently Nevada 990-10-70-02-00 represents a versatile solution within the 990 series of vibration transmitters. Specifically, this model features a full-scale range of 0-10 mils (0-250 μm) peak-to-peak, accommodating machines with wider vibration excursions. It integrates seamlessly with a single 3300 NSv proximity probe to deliver a standardized 4-20 mA output. Furthermore, the system length of 7.0 meters provides ample reach for remote transmitter placement. This version carries Option 00, meaning no agency approvals are required, making it ideal for general-purpose industrial monitoring where hazardous area certifications are unnecessary.
The 990-10-70-02-00 delivers reliable and repeatable measurements for condition monitoring programs. Its core function is to accept raw displacement data from a non-contacting 3300 NSv probe and extension cable, then condition that signal into a two-wire loop-powered output.
Input: Accepts 1 non-contacting 3300 NSv Proximity Probe and extension cable.
Power Supply: Requires +12 to +35 Vdc input at the transmitter terminal.
Output Signal: 4 to 20 mAdc over the specified full-scale range of 0-10 mils (0-250 μm).
Loop Accuracy: Within ±1.5% over the full-scale range, measured from TEST signal to a 250 Ω load. This error is additional to the Prox Out Incremental Scale Factor.
Maximum Loop Resistance: 1,000 Ω including cable at 35 Vdc.
Current Limiting: 23 mA typical.
Frequency Response: 5 Hz to 6,000 Hz +0, -3 dB.
Probe Gap: Must be set between 0.5 and 1.75 mm (20 and 55 mils) from the target.
Minimum Target Size: 9.5 mm (0.375 in) diameter.
Leadwire Length: Maximum 3 meters (10 feet) for Proximitor Sensor Output (BNC connector).
This transmitter features a compact, lightweight design suitable for panel or machine mounting. Its construction ensures durability in typical industrial environments.
Transmitter Weight: 0.43 kg (0.9 lbm).
Mounting Option: 02 Bulkhead screws for secure, permanent installation.
System Length Option: 70 7.0 meters (23.0 feet) total cable length.
Agency Approval Option: 00 Not required – intended for non-hazardous, general-purpose areas.
Proper installation is critical for achieving accurate vibration measurements. First, mount the Bently Nevada 990-10-70-02-00 using the provided bulkhead screws. Next, connect the 3300 NSv probe and its extension cable to the transmitter input. Then, gap the probe tip between 0.5 and 1.75 mm from the target surface to ensure the full 0-10 mil range is captured.
For the output wiring, configure a 2-wire current loop with a DC power supply between +12 and +35 Vdc. Additionally, confirm that the total loop resistance—including cables and any receiving devices—does not exceed 1,000 Ω at 35 Vdc. The 990-10-70-02-00 provides non-interacting zero and span adjustments, allowing you to fine-tune the 4 mA and 20 mA setpoints independently without affecting each other.
This transmitter includes a "Not OK" signal defeat function to enhance system reliability. When a fault occurs—for example, a probe disconnect or internal error—the output current drops below 3.6 mA within 100 µs. Consequently, your PLC or DCS can immediately recognize the failure and take appropriate action. After the fault condition clears, the output automatically recovers within 2-3 seconds. This fast response minimizes downtime and simplifies troubleshooting.
1 x Bently Nevada 990-10-70-02-00 Vibration Transmitter
Bulkhead screw mounting hardware
Quick-start installation guide
Please note: The 3300 NSv proximity probe, extension cable, and external power supply must be ordered separately.
All orders are dispatched via FedEx, UPS, or DHL to ensure prompt and secure delivery. Contact our team for real-time stock levels and estimated shipping times.
1. What vibration range does the 990-10-70-02-00 measure?
This model covers a peak-to-peak range of 0 to 10 mils (0 to 250 μm). The 10 full-scale option defines this wider range, which is suitable for machines with larger shaft movement, such as slow-speed turbines or heavy-duty compressors.
2. Does the 990-10-70-02-00 have hazardous area approvals?
No. This version carries Agency Approval Option 00, which means it has no certifications for hazardous locations. It is intended for general-purpose, non-hazardous industrial environments only.
3. Can I use this transmitter with a different probe?
The Bently Nevada 990-10-70-02-00 is specifically designed for the 3300 NSv proximity probe and its extension cable. Using other probes will compromise accuracy and may damage the input circuitry.
4. What power supply specifications are required?
You need a DC power supply between +12 and +35 Vdc connected at the transmitter terminals. For instance, a 28 V supply will allow a maximum loop resistance of 1,000 Ω, including all cables and loads.
5. How do I calibrate the zero and span on the 990-10-70-02-00?
The transmitter features non-interacting external zero and span potentiometers. You can adjust these using a small screwdriver while monitoring the loop current with a multimeter. Always refer to the product manual for the complete step-by-step calibration procedure.
| Brand Name | |
| Model No. | 990-10-70-02-00 |
| Product Type | Vibration Transmitter |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
