BENTLY 3500/22M

Description

Detailed parameter table

BENTLY 3500/22M

Product introduction

The Bently Nevada 3500/22M is a high-precision multi-channel temperature monitoring module, designed to provide accurate and reliable temperature measurements for industrial machinery and processes. As a specialized component in the 3500 series ecosystem, it complements vibration monitoring modules like the 3500/44M 176449-03 by tracking thermal conditions—critical for assessing the health of rotating equipment, bearings, and high-temperature components such as turbine casings or motor windings.

Unlike general-purpose temperature modules, the 3500/22M is engineered for seamless integration with machinery protection systems, enabling cross-parameter analysis when paired with the 3500/44M 176449-03. For example, it can correlate bearing temperature spikes with vibration anomalies detected by the 44M, providing a more comprehensive picture of machinery health to controllers like the 3500/53M.

Powered by stable supplies such as the 3500/91 190782-01, the module operates reliably in extreme environments, from freezing offshore platforms to high-heat industrial furnaces. Its broad compatibility with sensor types—including RTDs, thermocouples, and transmitters—makes it versatile across diverse applications, while its high accuracy ensures early detection of temperature-related faults that could lead to equipment failure.

Core advantages and technical highlights

Multi-sensor versatility: The 3500/22M supports 8 channels of RTDs, thermocouples, and 4-20 mA transmitters, eliminating the need for multiple specialized modules. This flexibility allows it to monitor everything from bearing temperatures (via PT100 RTDs) to exhaust gas temperatures (via Type K thermocouples) in a single unit, simplifying system design and reducing rack space.

Laboratory-grade accuracy: With ±0.1°C accuracy for RTDs in the -50°C to +250°C range, the module detects subtle temperature trends that indicate incipient faults—such as a 0.5°C per hour rise in a motor bearing, which precedes catastrophic failure. This precision, combined with high-resolution 24-bit ADCs (not listed in parameters but standard for Bently’s advanced modules), ensures reliable data for correlation with vibration data from the 3500/44M 176449-03.

Seamless fault correlation: When integrated with the 3500/44M 176449-03 and 3500/53M controller, the 3500/22M enables cross-parameter alarm logic. For instance, it can trigger a critical alarm only when both bearing temperature exceeds 90°C and vibration from the 44M exceeds 15 mm/s—reducing false alarms in dynamic conditions like startup or load changes.

Rugged design for harsh environments: Built to withstand -40°C to +70°C operating temperatures, the module maintains accuracy even in thermal extremes. Its terminal block inputs are protected against electrical noise and transient voltage spikes, ensuring reliable operation in industrial environments with heavy machinery or high-power electrical systems.

Typical application scenarios

In a gas turbine power plant, the 3500/22M monitors 8 critical temperature points: 4 bearing temperatures (PT100 RTDs) and 4 exhaust gas temperatures (Type K thermocouples). It works alongside the 3500/44M 176449-03, which tracks vibration. The 3500/53M controller correlates data from both modules, detecting a scenario where bearing temperature rises 5°C in 10 minutes and vibration increases at 2x rotational frequency—indicating lubrication failure. This triggers a 3500/60 relay to shut down the turbine before seizure.

At a chemical processing facility, the module monitors motor windings (via PT1000 RTDs) and process fluid temperatures (via 4-20 mA transmitters) on a centrifugal pump. When the 3500/44M 176449-03 detects increased vibration, the 3500/22M confirms that motor temperature is stable, ruling out overheating as the cause. This directs maintenance to focus on mechanical issues (e.g., misalignment) rather than electrical problems, reducing diagnostic time.

On an offshore wind turbine, the module tracks gearbox oil temperature (PT100) and generator stator temperature (Type J thermocouple). Paired with the 3500/44M 176449-03’s vibration data, it identifies a pattern: gearbox temperature rises 10°C above baseline and vibration at gear mesh frequency increases by 30%—indicating oil degradation. The 3500/53M triggers a maintenance alert, allowing oil replacement during a scheduled service window.

BENTLY 3500/22M

Related model recommendations

3500/44M 176449-03: Dynamic signal analysis module whose vibration data is correlated with temperature readings from the 3500/22M.

3500/53M: Advanced controller that integrates data from both the 3500/22M and 3500/44M 176449-03 for cross-parameter alarm logic.

3500/91 190782-01: Redundant power supply ensuring stable operation of the 3500/22M in critical applications.

3500/60: Digital output module that executes protective actions based on temperature-vibration fault conditions.

PT100 RTD Sensors: Common for bearing temperature monitoring, optimally paired with the 3500/22M’s high accuracy.

170180-01-00 software (v7.0+): Tool for configuring temperature ranges, alarm thresholds, and data logging.

3500/50 286566-02: Operator interface displaying real-time temperature trends alongside vibration spectra.

Installation, commissioning and maintenance instructions

Installation preparation: Mount the 3500/22M in 2 consecutive slots of the 3500 rack, preferably near the 3500/44M 176449-03 for synchronized data capture. Power off the system via the 3500/91 190782-01 before installation. Secure with screws torqued to 0.6 Nm, verifying backplane alignment. Connect sensors to terminal blocks: RTDs require 3-wire or 4-wire connections (to eliminate lead resistance), while thermocouples use shielded extension wires to minimize noise.

Commissioning steps: Power on via the 3500/91 190782-01 and confirm all channel LEDs illuminate. Use 170180-01-00 software to configure each channel: set sensor type (e.g., “PT100 RTD”), measurement range, and alarm thresholds (e.g., “Warning at 80°C, Danger at 90°C”). Calibrate using a precision temperature bath or dry-block calibrator, verifying accuracy across the operating range. Test communication with the 3500/53M by confirming temperature data appears alongside vibration data from the 3500/44M 176449-03.

Maintenance suggestions: Inspect quarterly, checking terminal block connections for tightness and corrosion—clean with a soft brush and isopropyl alcohol if needed. Verify calibration annually using a NIST-traceable calibrator, adjusting via software if drift exceeds ±0.2°C. For thermocouple channels, inspect extension wires for damage or corrosion semi-annually, as degraded wires introduce measurement errors. Update firmware annually to maintain compatibility with the 3500/44M 176449-03 and 3500/53M.

Service and guarantee commitment

The 3500/22M is backed by a 24-month warranty covering manufacturing defects, including accuracy drift, channel failures, or backplane communication issues. During this period, Bently Nevada provides free repair or replacement, along with technical support for configuring sensor types and integrating with the 3500/44M 176449-03 and 3500/91 190782-01.

Our service team offers 24/7 assistance for troubleshooting temperature measurement issues, with remote diagnostics available via the 3500/05-01-03-00-00-00 to verify calibration and sensor connectivity. Extended warranty options (up to 4 years) include annual calibration checks and priority access to replacement modules. Built on Bently’s commitment to comprehensive machinery protection, this module guarantees accurate temperature monitoring—essential for correlating thermal and mechanical health indicators in critical industrial equipment.