IS200TBTCH1CAA - Thermocouple Terminal Board

SPECIFICATIONS

Part No.: IS200TBTCH1CAA
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Number of channels: 24
Thermocouple types: E, J, K, S, T
Span: -8 mV to +45 mV
Product Type: Thermocouple Terminal Board
Availability: In Stock
Series: Mark VIe

Functional Description

IS200TBTCH1CAA is a thermocouple terminal board developed by GE. It is part of the Mark VIe series. The terminal board is designed to accommodate 24 thermocouple inputs, supporting type E, J, K, S, or T thermocouples. These inputs are connected to barrier-type blocks on the board and interface with the I/O processor through D-type connectors.

Input Range and Voltage Characteristics

The thermocouple inputs on the terminal board support a full-scale input range spanning from -8.0 mV to +45.0 mV. A table detailing typical input voltages corresponding to various thermocouple types against their minimum and maximum temperature ranges is provided for reference.

CJ Signals and Monitoring

The CJ signals, entering the signal space, are accessible for monitoring purposes, typically utilizing the average of the two signals. Configured acceptable limits are employed, triggering a logic signal if a CJ signal surpasses these limits. It's noteworthy that a 1 �F error in CJ compensation directly influences the accuracy of the thermocouple reading, causing a similar 1oF error.

Fault Detection and Handling

Predefined limits are firmly set at -40 to 85oC. Should a CJ signal exceed these limits, it is flagged as faulty. The majority of CJ failures are attributable to open or short circuits. In the event of a fault, the backup value is implemented, either obtained from CJ readings on other terminal boards or from the configured default value.

Cold Junction Compensation

The process of cold junction compensation involves measuring the reference junction temperature at two distinct locations on every H1C terminal board. The TMR H1B board, specifically, incorporates six cold junction references, yet only three are accessible due to limitations with available packs.

Cold Junction Temperature Accuracy

The accuracy of the cold junction temperature is maintained at a level of 2�F, ensuring precise measurement and compensation within this margin.

Fault Detection Mechanisms

The system implements several fault detection mechanisms:

• High/Low Limit Checks (Hardware): A crucial hardware-based procedure involves constant monitoring through high and low limit checks. These checks oversee the temperature and other relevant readings, acting as a safeguard against values exceeding predetermined thresholds.
• Monitoring of Readings: All thermocouples (TCs), cold junctions (CJs), calibration voltages, and calibration zero readings are continually monitored. This comprehensive monitoring scheme ensures constant surveillance and early detection of any discrepancies or irregularities in the measurements.
• These fault detection protocols work synergistically to maintain the integrity and reliability of the system, promptly identifying and addressing any deviations or faults that may arise in the temperature measurement or calibration process.

The WOC team is always available to help you with your Mark VIe requirements. For more information, please contact WOC.

Frequently Asked Questions

What is IS200TBTCH1CAA?
It is a thermocouple terminal board developed by GE under the Mark VIe series.

Can you elaborate on the grounding of the thermocouple inputs?
The 24 thermocouple inputs can be either grounded or ungrounded, offering flexibility in their installation and setup within the system.

How is high-frequency noise managed within the system?
To suppress high-frequency noise, the system incorporates specific mechanisms or components designed to mitigate and counteract unwanted electrical interference that may affect the accuracy of the thermocouple readings.

What cold junction reference devices are present on the TBTC?
The board features two cold junction reference devices, strategically placed to facilitate accurate cold junction compensation for the thermocouple inputs. These references play a vital role in ensuring precise temperature measurements.