GE DS200TCQAG1B

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 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 +70°C (extended upper limit vs G1A at 65°C)
Storage Temp: -40°C to +85°C
Mounting: VME rack
Suffix “G1B”: High accuracy + advanced diagnostics (drift, degradation, sense-lead integrity) + G1 wiring + extended upper temperature limit (70°C) + standard conformal coating

Key Features

High accuracy – ±0.08% for critical temperature monitoring
Advanced diagnostics – drift monitoring, degradation prediction, sense-lead integrity, and open/short detection
Extended upper temperature limit – operates up to 70°C, suitable for hotter cabinets
Faster sampling – 10 Hz for responsive monitoring
G1 wiring configuration – standard channel-to-terminal mapping matching most GE cabinets
Improved cold-junction compensation – stable readings across ambient variations
Simple swap – no firmware changes required in most Mark V systems
LED status per channel + board health with diagnostic indicators
Standard conformal coating for moisture/dust resistance
Backward compatible with Mark V and Mark VIe (hot-swap only on VIe Rev D+)

Applications

Gas turbine EGT monitoring in hot climates – where cabinet temperatures reach 65-70°C and predictive diagnostics are valuable
Steam turbine bearings in poorly ventilated areas – critical protection with drift anticipation
Generator stator cooling in tropical environments – precision measurement with diagnostic assurance
Compressor performance monitoring in desert installations – reliability under thermal stress
Critical points requiring both high accuracy and early fault warnings

Comparison with Competitors

Selection Tips

Choose the DS200TCQAG1B if you need high accuracy (±0.08%), advanced diagnostics, and extended temperature capability (70°C) with G1 wiring
For the same features with standard temperature (65°C), the DS200TCQAG1A may be sufficient
For enhanced coating protection with similar specs, consider DS200TCQAG1B with specialized coating suffix (e.g., DS200TCQAG1BBC or similar)
For basic accuracy without diagnostics, the DS200TCEBG1B is more economical
For 4-wire long-distance needs with diagnostics, consider DS200TCDAH1BGD (lower accuracy at ±0.10%)
Verify existing wiring is 2-wire standard – G1-series terminal mapping applies
Source refurbished units with diagnostic test validation

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 +70°C operating range – exceeding 70°C reduces component life
Calibrate every 24 months – diagnostics depend on a valid baseline calibration
Ground shields only at the board end
Verify thermocouple type – optimized for J/K (T/E reduces accuracy to ±0.15%)
Monitor diagnostic logs – drift warnings indicate sensor aging; plan proactive replacement
Label clearly – mark as “TCQAG1B – DIAG/EXT TEMP” to ensure proper handling
Monitor cabinet temperature – if consistently near 70°C, consider cooling improvements or upgrade to wider-range variants if needed