3500/65 - Channel Temperature Monitor

SPECIFICATIONS

Part Number: 3500/65
Manufacturer: Bently Nevada
Series: 3500
Operating Temperature: -30oC to +65oC
Storage Temperature:-40oC to +85oC
Power Consumption: 3 watts
Signal: Accepts from 1 to 16 signals
Input Impedance: Greater than 1 Mega ohm
Product type: Channel Temperature Monitor
Country of Manufacture: United States (USA)

Functional Description

3500/65 is a 16-channel temperature monitor developed by Bently Nevada. The Temperature Monitor offers 16 channels for comprehensive temperature monitoring, supporting both Resistance Temperature Detectors (RTDs) and Isolated Tip Thermocouples (TCs). It processes these inputs and compares the measured values against user-defined alarm setpoints. Configuration of the monitor is performed using the Rack Configuration Software, allowing customization to accept various input types, including isolated tip TCs, 3-wire RTDs, 4-wire RTDs, or a combination of both. For Triple Modular Redundant (TMR) setups, the monitors must be installed in groups of three adjacent modules. This arrangement leverages two types of voting mechanisms to ensure operational accuracy and prevent single-point failures, enhancing reliability in critical applications.

Input Specifications

The 16-Channel Temperature Monitor offers exceptional flexibility and precision in handling various input types and signal conditions:

• Power Consumption: The module operates efficiently with a nominal power requirement of 3 watts, ensuring low energy consumption while delivering reliable performance.
• Signal Inputs: The monitor accommodates 1 to 16 transducer signals, supporting both Resistance Temperature Detectors (RTDs) and Isolated Tip Thermocouples (TCs).
• Input Impedance: Each input boasts an impedance greater than 1 Mega Ohm, ensuring minimal signal interference and high fidelity.
• RTD Current Source: The module provides a current source of 913.7 µA per transducer at a standard temperature of 25°C. This ensures precise readings, especially for 3-wire and 4-wire RTD configurations.

Front Panel LEDs

The front panel of the Temperature Monitor includes a set of LEDs to provide visual status updates, ensuring ease of monitoring and troubleshooting:

• OK LED: This green LED confirms that the monitor is functioning correctly and operating within normal parameters.
• TX/RX LED: This LED indicates active communication between the monitor and other modules within the 3500 rack system, ensuring seamless data exchange.
• Bypass LED: When lit, this LED signals that the module is in Bypass Mode, typically during maintenance or system troubleshooting, allowing users to safely address issues without affecting overall system operation.

These LEDs provide immediate, at-a-glance feedback on the monitor's operational status, enhancing user confidence and system reliability.

Alarm Setpoints

• Configurable Alerts and Danger Levels: Users can program Alert and Danger setpoints for each temperature channel using the 3500 Rack Configuration Software.
• Full-Scale Alarm Range: Alarms can be configured for any value within 0–100% of the full-scale range. However, when the sensor’s range is narrower than the full-scale range, the software automatically adjusts the alarm setpoints to remain within the sensor's capabilities.
• High Accuracy: Alarm setpoints are accurate to within ±0.13% of the desired value, ensuring precise notification of deviations.
• Under- and Over-Alarm Setpoints: The module supports both under-range and over-range alarms, allowing comprehensive monitoring and proactive response to potential issues.

WOC is happy to assist you with any of your Bently Nevada requirements. Please contact us by phone or email for pricing and availability on any parts and repairs.

FREQUENTLY ASKED QUESTIONS

What is 3500/65?
It is a 16-channel temperature monitor developed by Bently Nevada.

What types of temperature inputs does the 16-Channel Temperature Monitor accept?
It can accept isolated tip thermocouples, 3-wire RTD, 4-wire RTD, or a combination of TC and RTD inputs.

What software is used to program the system?
The 3500 Rack Configuration Software is used to program the 16-Channel Temperature Monitor.

How should the Temperature Monitors be installed?
Temperature monitors must be installed in groups of three adjacent monitors in Triple Modular Redundant (TMR) configurations. This is to ensure accurate operation and to avoid single-point failures.

How is the component configured?
The monitor is configured using the 3500 Rack Configuration Software, which allows users to set up input types, alarm thresholds, and operational parameters.

Can the monitor be used in TMR configurations?
Yes, it is compatible with Triple Modular Redundant (TMR) configurations. For this setup, monitors must be installed in groups of three adjacent modules to utilize voting mechanisms for increased reliability and failure prevention.

What kind of alarms can be programmed on the monitor?
Users can set both Alert and Danger alarm thresholds for each measured value. These alarms can range from 0 to 100 percent of the full-scale value, but the software limits the range to the sensor's capabilities when necessary.

What LEDs are present on the front panel, and what do they indicate?
The front panel includes OK LED that the monitor is functioning correctly. TX/RX LED Signals active communication with other modules in the rack. Bypass LED Indicates that the monitor is in Bypass Mode.