DS200TCTGG2A GE

Technical Parameters

Manufacturer: GE
Series: Mark V / Mark VIe
Channels: 16 differential
Input Range: -10 mV to +100 mV (Type J/K/T/E)
Cold Junction: Single onboard sensor with enhanced linearization and improved thermal isolation
Isolation: 1500V AC
Accuracy: ±0.08% at 25°C, ±0.15% across full temperature range
Sampling: 10 Hz sequential
Operating Temp: -30°C to +65°C
Storage Temp: -40°C to +85°C
Mounting: VME rack
Suffix “G2A”: Enhanced accuracy (0.08%) + G2 wiring configuration + enhanced cold-junction compensation + basic diagnostics (open/short only) + standard conformal coating

Advantages & Key Features

The DS200TCTGG2A offers high precision with improved ambient stability for G2 systems. Key advantages include:

Enhanced Accuracy – ±0.08% for critical temperature measurements.
Enhanced Cold-Junction Compensation – Better linearization across ambient variations than standard G2 variants.
G2-Specific Wiring Configuration – Unique channel-to-terminal mapping matching specific GE cabinet wiring standards; direct drop-in for G2-configured systems.
Faster Sampling – 10 Hz for responsive monitoring.
Basic Self-Diagnostics – Open-circuit and short-circuit detection per channel.
Simple Swap – No firmware changes required in most Mark V systems.
LED Status – Per-channel + board health indicators.
Standard Conformal Coating – Moisture and dust resistance.
Backward Compatibility – Compatible with Mark V and Mark VIe (hot-swap only on VIe Rev D+).

Application Cases

This board is ideal for applications requiring high accuracy with improved stability in G2-configured cabinets:

Gas Turbine EGT Monitoring in G2 Retrofits – Precise exhaust temperature tracking with stable readings despite ambient shifts.
Steam Turbine Bearing & Casing Temperatures in G2 Systems – Critical protection with enhanced compensation.
Generator Stator Cooling in G2 Cabinets – Accurate temperature monitoring for over-temperature protection.
Compressor Performance Monitoring with G2 Wiring – High-precision data with improved ambient stability.
HRSG Temperature Measurement in G2 Installations – Improved thermal efficiency tracking.

Comparison with Competitors

Selection Tips

Choose the DS200TCTGG2A only if your cabinet uses G2 wiring configuration and you need enhanced accuracy (±0.08%) with enhanced cold-junction compensation.
For G2 systems with standard compensation, consider the DS200TCTGG2 (if available).
For G2 systems with higher accuracy and advanced diagnostics, consider the DS200TCQAG2A series (with drift/degradation monitoring).
For G2 systems with basic monitoring where ±0.12% is acceptable, the DS200TCRAG2A is more economical.
For G1 systems requiring similar features, use DS200TCTGG1A.
If you are rewiring the cabinet, consider converting to G1 for broader board availability.
Verify existing wiring pinout against G2 standard – using the wrong terminal block or miswiring will scramble channel readings.
Source refurbished units with G2 pinout verification and cold-junction compensation validation in the test report.

Precautions

ESD Sensitive – Use wrist strap.
Power Down for Mark V removal (no hot-swap).
Torque Terminals to 0.5 N·m max.
Do Not Exceed -30°C to +65°C operating range.
Pinout Critical – G2 mapping differs from G1; verify cabinet wiring before installation.
Calibrate Every 24 Months – Accuracy and compensation depend on valid calibration.
Ground Shields only at the board end.
Verify Thermocouple Type – Optimized for J/K (T/E reduces accuracy to ±0.15%).
Label Clearly – Mark board and slot as “TCTGG2A – ENH ACCURACY/CJC/G2” to ensure proper handling and prevent future miswiring with G1 boards.
Do Not Mix G1 and G2 Boards without verifying terminal block compatibility in the same rack.