BENTLY NEVADA 990-05-50-01-CN | 990 Vibration Transmitter

The 990 Vibration Transmitter is designed for OEMs (Original Equipment Manufacturers) of centrifugal air compressors, small pumps, motors, or fans. It provides a simple 4 to 20 mA proportional vibration signal to machinery control systems, making it ideal for applications that require vibration monitoring with an easy integration to existing machinery protection systems.

This device is a two-wire, loop-powered transmitter that accepts input from a 3300 NSv proximity probe and its matching extension cable (available in 5 m and 7 m system length options). The transmitter conditions the signal and provides it as a 4 to 20 mA output, which corresponds to peak-to-peak vibration amplitude in engineering units.

Notable Features

Integrated Proximitor Sensor: Requires no external unit, simplifying the setup.
Diagnostic Outputs: Non-isolated “PROX OUT” and “COM” terminals with a coaxial connector offer a dynamic vibration and gap voltage signal output for diagnostics.
Adjustable Potentiometers: Zero and span potentiometers support easy loop adjustment.
Test Input Pin: Allows for quick loop signal output verification using a function generator.
Not OK/Signal Defeat Circuit: Prevents false alarms or high outputs due to faulty probes or loose connections.
Mounting Options: Includes DIN-rail clips or bulkhead mounting screws for easy installation.

Specifications

Environmental Limits

Operating Temperature:
-35°C to +85°C (―31°F to +185°F)
Storage Temperature:
-52°C to +100°C (―62°F to +212°F)

Mechanical Characteristics

Probe Tip Material:
Polyphenylene sulfide (PPS)
Transducer Case Material:
AISI 303 or 304 Stainless Steel (SST)
Weight:
0.43 kg (0.9 lb)

Ordering Information

Manufacturer: Bently Nevada
Product No.: 990-05-50-01-CN
Product Type: 990 Vibration Transmitter

Full-Scale Option:
05 = 0-5 mils pp (0-100 µm pp)
System Length Option:
50 = 5.0 meters (16.4 feet)
Mounting Option:
01 = 35 mm DIN rail clips
Agency Approval Option:
CN = Approvals country-specific
(Refer to the Approvals Option Quick Reference Guide and Field Notification Letter for more details)

Additional Features

Probe Cable:
75Ω coaxial, fluoroethylene propylene (FEP) insulated.
Cable Armor (Optional):
Flexible AISI 302 SST with optional FEP outer jacket.
Tensile Strength:
222 N (50 lbf) maximum from probe case to probe lead.
Weight:
0.82 kg

Contact Us

Phone: +86-15915488782
Email: uma@meloauto.com
WhatsApp: +8615915488782
Business Hours: 24/7 service
Address: Unit 601, Powerlong International Center, No. 1599 Luling Road, Siming District, Xiamen City, Fujian, China

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