Temperature Monitor Bently Nevada 3500/61-01-02

Bently Nevada 3500/61-01-02 Temperature Monitor with Recorder Outputs

• Manufacturer & Model: Bently Nevada 3500/61-01-02 temperature monitor for 3500 series monitoring systems.
• Product Type: Temperature monitor with recorder outputs. I/O Type: RTD/TC non-isolated with internal terminations.
• Agency Approval: 02 = ATEX, IECEx, CSA (Class I, Zone 2).
• Made in: U.S.A.

Key Specifications

• Power consumption: 9 watts nominal for 3500/61 model.
• Input impedance: 10 MOhms for each lead input.
• Number of inputs: Accepts 1 to 6 RTD or TC transducer signals.
• Recorder outputs: 4 to 20 mA proportional to full scale. Load range 0 to 600 Ohms.
• Resolution: 0.3662 microamps per bit. Accuracy ±0.15% at room temperature.

Thermocouple (TC) Input Ranges

• Type E: -100 to +1000 degrees Celsius (-148 to +1832 degrees Fahrenheit).
• Type J: -18 to +760 degrees Celsius (0 to +1400 degrees Fahrenheit).
• Type K: -18 to +1370 degrees Celsius (0 to +2498 degrees Fahrenheit).
• Type T: -160 to +400 degrees Celsius (-256 to +752 degrees Fahrenheit).
• Type E restriction: Above +35°C ambient, range reduces to -60 to +1000°C. Do not configure below -60°C.

RTD Input Ranges

• Platinum RTD (alpha 0.00385): -200 to +850°C (-328 to +1562°F). Worldwide industrial standard. Recommended for all applications.
• Platinum RTD (alpha 0.00392): -200 to +700°C (-328 to +1292°F).
• Nickel RTD (120 Ohm): -80 to +260°C (-112 to +500°F).
• Copper RTD (10 Ohm): -100 to +260°C (-148 to +500°F). Resolution 1°C. Accuracy ±3°C at 25°C.

I/O Module Details

• I/O Type: 01 = RTD/TC non-isolated I/O module with internal terminations.
• System isolation: 500 Vdc. Channel to channel isolation: 250 Vdc.
• RTD current source: 925 ±15 microamps at 25°C per transducer.
• Recorder voltage compliance: 0 to +12 Vdc across load.
• Short circuit protection: Monitor operation unaffected by recorder output shorts.

Accuracy Specifications

• Internal termination non-isolated: ±3°C at 25°C (±5.4°F at 77°F).
• External termination non-isolated (standard rack): ±1°C at 25°C (±1.8°F at 77°F).
• Internal termination isolated (standard rack): ±3°C at 25°C (±5.4°F at 77°F).
• External termination isolated (bulkhead or standard rack): ±1°C at 25°C (±1.8°F at 77°F).

Front Panel Indicators

• OK LED: Indicates when temperature monitor operates properly.
• TX/RX LED: Indicates communication with other rack modules.
• Bypass LED: Indicates when monitor is in bypass mode.

Environmental Limits

• Operating with internal/external termination: -30 to +65 degrees Celsius (-22 to +150 degrees Fahrenheit).
• Operating with internal barrier I/O: 0 to +65 degrees Celsius (32 to +150 degrees Fahrenheit).
• Storage temperature: -40 to +85 degrees Celsius (-40 to +185 degrees Fahrenheit).

Physical Dimensions

• Monitor module: 241.3 x 24.4 x 241.8 mm, 0.91 kg. One full-height front slot.
• I/O module (standard): 241.3 x 24.4 x 99.1 mm, 0.45 kg. One full-height rear slot.
• I/O module (internal barrier): 241.3 x 24.4 x 163.1 mm, 0.46 kg.

Hazardous Area Approvals

• ATEX: Certified for European explosive atmospheres.
• IECEx: International certification for worldwide use.
• CSA: Class I, Zone 2 certified for North America.
• Application: Refineries, chemical plants, gas pipelines, offshore platforms.

Package Contents

• 3500/61-01-02 temperature monitor module.
• RTD/TC non-isolated I/O module with internal terminations.
• Documentation and installation guide.

Shipping Information

• Weight: Approximately 1.36 kg (3.0 lb) combined.
• Packaging: Factory sealed boxes.
• Carriers: FedEx, UPS, DHL (2 to 5 business days).

Frequently Asked Questions

• Q: What is the difference between 3500/60 and 3500/61?
  A: 3500/60 consumes 7 watts nominal. 3500/61 consumes 9 watts nominal. Both accept 1 to 6 RTD or TC inputs. The 3500/61 includes recorder outputs (4 to 20 mA).
• Q: What does non-isolated I/O module mean?
  A: Non-isolated I/O modules do not provide channel to channel isolation. Isolated modules (options -03 or -04) provide 250 Vdc channel isolation. Isolation only matters during fault scenarios.
• Q: What is the accuracy for copper RTD?
  A: Copper RTD has 1°C resolution with ±3°C accuracy at 25°C. For higher accuracy applications, use platinum RTD (alpha 0.00385) which provides better performance.
• Q: Can I use Type E thermocouples in high ambient temperatures?
  A: Above +35°C ambient, the range reduces to -60 to +1000°C. The software allows configuration down to -100°C, but the system will not function properly. Do not configure below -60°C.
• Q: What rack space does this monitor require?
  A: Monitor module needs one full-height front slot. I/O module needs one full-height rear slot. For internal barrier I/O modules, depth is 163.1 mm vs standard 99.1 mm.