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Product Name: THERMOCOUPLE CONDITION CARD
Brand Name: GE
Model Number:DS3800NTCF1C1C
Country of Origin:USA
Warranty: 12 Months
Whatsapp：+86 18159889985
Email：[email protected]
Brand Name: |
General Electric |
Model Number: |
DS3800NTCF1C1C |
Country of Origin: |
USA |
Packaging Details: |
Original new Factory Sealed |
Delivery Time: |
Delivery time in stock |
Payment Terms: |
T/T |
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Sales Manager: |
Stella |
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The DS3800NTCF1C1C is a thermocouple condition card engineered by GE for the Mark IV Speedtronic turbine control system. Each DS3800NTCF1C1C acquires millivolt‑level signals from field thermocouples, performs amplification and linearization, and transmits processed temperature data to the controller for real‑time monitoring and protection logic. The Mark IV architecture integrates thirteen DS3800NTCF1C1C cards to achieve statistical accuracy and hardware redundancy in exhaust temperature regulation. Equipped with jumper switches, potentiometers, test points, and built‑in diagnostic access, the DS3800NTCF1C1C delivers precise thermal feedback essential for safe and efficient turbine operation.
Gas turbine exhaust temperature monitoring and regulation
Steam turbine supervisory control and safety shutdown
Combustor thermal balance and efficiency optimization
High‑temperature process control requiring thermocouple signal conditioning
Retrofit replacement for legacy Mark IV Speedtronic systems
Power generation turbine management and protection
Real‑Time Exhaust Temperature Acquisition: Reads live temperature data from thermocouples installed around the turbine exhaust plenum, enabling continuous thermal assessment and regulation.
Deviation‑Based Command Generation: Computes the difference between actual measured temperature and a preset reference setpoint; this delta becomes the command signal to adjust fuel delivery and maintain optimal exhaust temperature.
Thirteen‑Card Statistical Redundancy: The Mark IV system deploys thirteen DS3800NTCF1C1C cards in parallel; a median‑value algorithm discards the highest and lowest readings, ensuring reliable temperature control even if individual cards provide corrupted data.
Fail‑Safe Triple Redundancy Architecture: All critical protection parameters are backed by triple‑redundant hardware, allowing the system to seamlessly shift control to backup modules when a card fails.
Comprehensive On‑Board Diagnostics: Seven test points (TP) provide direct access for field troubleshooting; jumper switches and potentiometers allow voltage division adjustments and signal trimming without removing the card.
Robust Industrial Construction: High‑quality components — ceramic‑covered metal film resistors, ceramic and polyester film capacitors, and nickel‑plated contacts — withstand vibration, humidity, and thermal stress in power generation environments.
Nylon Extractor Clips for Safe Handling: Two nylon clips on the PCB corners serve as lever points and handles, allowing technicians to install or remove the card from tight backplane locations without damaging components or adjacent wiring.
High Measurement Accuracy: ±0.5% of full‑scale accuracy ensures reliable temperature feedback for critical safety shutdown thresholds and process control decisions.
Triple‑Redundant Communication Pathways: Built with eight circuits including hex inverting gates and three‑state octal buffers, enabling fault‑tolerant data exchange between the thermocouple card and the Mark IV controller backplane.
Converts low‑level thermocouple millivolt signals into conditioned, linearized temperature data for the Mark IV control system.
Compares real‑time exhaust temperature readings against preset reference values and transmits the resulting deviation signal to the controller for fuel delivery adjustment.
Participates in the system’s thirteen‑card statistical temperature control algorithm, where the median reading from multiple cards determines actual exhaust temperature.
Provides on‑board calibration and trimming capability via potentiometers and jumper switches to maintain measurement accuracy over time.
Delivers temperature feedback for safety shutdown logic, triggering emergency stops when critical thresholds are exceeded.
Communicates with the Mark IV backplane via dual PCB connectors (218A4637-P4 and 218A4553-1), supporting high‑integrity data exchange between thermocouple inputs and the central processor.
Offers seven test points (TP) for direct signal probing, enabling technicians to diagnose channel‑level faults without removing the card from the rack.
Maintains triple‑redundant fail‑safe operation: if one card corrupts its data or fails entirely, the remaining cards continue delivering valid temperature inputs, preventing single‑point failures from affecting turbine protection.
Supplies isolated relay outputs (2× SPST relays) for auxiliary alarm or shutdown indication based on temperature threshold violations.
Supports cold junction compensation to ensure accurate temperature measurement across varying ambient conditions around the turbine package.
Q1: What is the DS3800NTCF1C1C used for in a turbine control system?
A1: The DS3800NTCF1C1C is a thermocouple condition card that monitors exhaust temperature in GE Mark IV gas and steam turbines, providing real‑time thermal feedback for combustion control and safety shutdown.
Q2: How many DS3800NTCF1C1C cards are used in a standard Mark IV exhaust temperature monitoring system?
A2: The Mark IV system employs thirteen DS3800NTCF1C1C cards positioned around the exhaust plenum. A control algorithm calculates the median value (excluding the highest and lowest readings) to determine actual exhaust temperature.
Q3: What happens if one DS3800NTCF1C1C card fails or provides corrupted data?
A3: Corrupted data from one card may be discarded by the median‑value algorithm; however, if multiple cards fail, poor statistical input can lead to inaccurate temperature regulation, potentially causing combustor or engine issues.
Q4: Does the DS3800NTCF1C1C support on‑board diagnostic access?
A4: Yes, the DS3800NTCF1C1C includes seven test points (TP) for direct probing of signals and power rails, plus potentiometers and jumper switches for in‑situ calibration and signal adjustment without removing the card.
Q5: Can the DS3800NTCF1C1C be replaced while the turbine control system is operating?
A5: While the Mark IV system supports triple‑redundant hardware, replacement of a DS3800NTCF1C1C card typically requires system power‑down or de‑energizing the affected rack, as live swapping is not specified for this legacy PCB.
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