Bently Nevada 991-25-50-02-05 Thrust Transmitter

Bently Nevada 991-25-50-02-05 Thrust Transmitter

Product Introduction

The Bently Nevada 991-25-50-02-05 is a high-performance Thrust Transmitter engineered for axial position monitoring. It accurately measures shaft movement relative to a bearing housing. This particular model offers a full-scale range of 25-0-25 mils. It is specifically designed to accept input from a 3300 NSv Proximity Probe and extension cable. The unit provides a reliable 4 to 20 mAdc signal that is proportional to the thrust position.

Technical Specifications

This transmitter is built to deliver precise data in demanding environments. It is a 2-wire loop-powered device. The 991-25-50-02-05 requires a DC input voltage between +12 and +35 Vdc at its terminals. The loop accuracy is typically within ±1.5% of the full-scale range. This accuracy is measured from the TEST signal input to a 250 Ω loop resistance. The device's output is linear over a range of 0.25 to 1.65 mm. It is suitable for proportional current loop ranges of 0.6-0-0.6 mm or 25-0-25 mils.

The transmitter features robust protection mechanisms. For instance, the output signal will drop to less than 3.6 mA in under 100 µs if a Not OK condition occurs. Moreover, it will automatically restore to normal within 0.1 seconds after the fault is cleared. This model includes external zero and span adjustments. These adjustments are non-interacting, which simplifies the calibration process. The maximum loop resistance is 1,000 Ω, including the cable, at 35 Vdc.

Environmental and Mechanical Limits

The Bently Nevada 991 series transmitter performs reliably across a wide temperature range. Its operating temperature extends from -35°C to +85°C. Meanwhile, the storage temperature range is between -51°C and +100°C. This resilience makes it suitable for harsh industrial settings. The total weight of the unit is approximately 0.43 kg. It is designed for DIN rail mounting, which facilitates straightforward installation in standard cabinets.

Agency Approvals and Installation

This device complies with several international safety standards. Specifically, it holds an Agency Approval Option of 05. This certification includes CSA Division 2, ATEX Zone 0, and ATEX Zone 2. It also includes ABS maritime approval for marine applications. The mounting option for this unit is bulkhead screws. This ensures a secure and stable installation. The system length option for the 991-25-50-02-05 is set at 5.0 meters.

When installing, ensure the power supply meets the required +12 to +35 Vdc range. Furthermore, check that the loop resistance does not exceed 1,000 Ω. This will guarantee accurate signal transmission. The device accepts one non-contacting 3300 NSv Proximity Probe. It also integrates seamlessly with the corresponding extension cable.

Packaging and Shipping

The Bently Nevada 991-25-50-02-05 is packaged securely to prevent transit damage. The standard package includes the transmitter unit itself and necessary mounting hardware. Please note that this package does not include the proximity probe or extension cable. It also does not include certificates or warranty documents. We utilize major courier services for delivery. Consequently, we ship via FedEx, UPS, or DHL to ensure fast and reliable global shipping.

Frequently Asked Questions (FAQ)

1. What is the full-scale range of the 991-25-50-02-05?
The Bently Nevada 991-25-50-02-05 has a full-scale option of -25, which corresponds to a bidirectional range of 25-0-25 mils.

2. What type of power supply does this transmitter require?
This device requires a DC power supply. Specifically, you need to provide between +12 and +35 Vdc at the transmitter terminal.

3. What happens to the output during a system fault?
In a Not OK condition, the output signal will go to less than 3.6 mA. It will remain there until the fault condition is resolved.

4. Is this model suitable for use in hazardous areas?
Yes, it is. The 991-25-50-02-05 holds approvals for CSA Division 2 and ATEX Zone 0 and Zone 2. It also includes ABS maritime approval.

5. What is the maximum loop resistance for this transmitter?
The maximum loop resistance allowed is 1,000 Ω. This limit includes the resistance of the cable at 35 Vdc.