Overview
Configured for six-channel thermocouple temperature monitoring in the 3300 System, the Bently Nevada 79502-01 (3300/30 Six-Channel Temperature Monitor) provides direct temperature signal acquisition and alarm comparison. The module accepts grounded or non-grounded thermocouple inputs and processes six independent temperature channels.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 3300/30 |
| Part Number | 79502-01 |
| Brand | Bently Nevada |
| Manufacturer | Baker Hughes / Bently Nevada |
| Product Series | 3300/30 System |
| Product Type | Six-Channel Temperature Monitor Module |
| Number of Channels | 6 independent temperature channels |
| Input Signal | Thermocouple |
| Input Configuration | Grounded or non-grounded thermocouple signals |
| Supported Thermocouples | Type J, Type K, Type T, Type E |
| Type J Range | Up to 500 deg C |
| Type K Range | Up to 500 deg C |
| Type T Range | Up to 250 deg C |
| Type E Range | Up to 250 deg C |
| Alarm Functions | Alert and Danger alarm setpoints per channel |
| Rack Space | 2 rack slots, excluding positions 1 and 2 in standard 3300 racks |
| Weight | Approx. 2.8 kg |
| Dimensions | Not specified in the supplied data |
| Operating Temp | 0 deg C to +65 deg C |
| Storage Temp | -40 deg C to +85 deg C |
| Relative Humidity | Up to 95%, non-condensing |
Thermocouple Signal and Monitoring Characteristics
The 79502-01 receives six independent thermocouple signals for temperature measurement. It supports both grounded and non-grounded thermocouple configurations.
The module compares each measured temperature with its configured alarm thresholds. Therefore, each channel can provide separate Alert and Danger alarm conditions within the 3300/30 monitoring arrangement.
Because thermocouple wiring carries low-level analog signals, installation should maintain appropriate separation from high-current power conductors and switching circuits. Where grounded thermocouples are used, the installer should verify the grounding arrangement against the installed 3300 System configuration.
For machinery applications, temperature measurements can complement vibration and other rotor-dynamic measurements. However, the 79502-01 itself performs temperature monitoring rather than eddy-current probe measurement or rotor-position measurement.
Frequently Asked Questions
Q: How many temperature inputs does the 79502-01 provide?
A: The module provides 6 independent thermocouple input channels.
Q: Which thermocouple types does the 79502-01 support?
A: The supplied specifications identify Type J, Type K, Type T, and Type E thermocouples. Type J and Type K support temperatures up to 500 deg C, while Type T and Type E support temperatures up to 250 deg C.
Q: Does the module require a specific rack position?
A: The 79502-01 occupies 2 rack slots and excludes positions 1 and 2 in standard 3300 racks. Verify the installed rack arrangement before replacement or installation.
Field Installation Guidelines
Install the module in the specified 3300 System rack positions and confirm that the rack configuration matches the module requirements.
Route thermocouple wiring separately from high-voltage, motor, relay, and other high-current conductors to reduce electrical interference. Maintain the required signal polarity and terminal identification throughout the wiring path.
For grounded thermocouples, verify the grounding scheme before energizing the system. Avoid creating unintended ground paths through cable shields, cabinet bonding, or adjacent instrumentation.
Before operation, verify all six channel connections and confirm that each channel corresponds to the intended temperature measurement point. Check the configured Alert and Danger thresholds against the approved machinery protection settings.
The supplied data does not specify power consumption, module dimensions, or a dedicated shielding termination method. Use the applicable 3300 System installation documentation for those parameters rather than assuming values from another module variant.
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