Description
Technical Parameters
| Parameter | Specification |
|---|---|
| Inputs | 8 differential, TC-dedicated (J,K,T,E,R,S,B,N) |
| ADC | 20-bit sigma-delta (17.8-bit effective) |
| Accuracy | ±0.04% FS (25°C); ±0.10% (-40°C to +85°C) |
| CJC Accuracy | ±0.22°C (4 sensors) |
| Sampling | 10-750 Hz (user-selectable) |
| Isolation | 2200V RMS |
| Power | +5V @ 1.25A; +15V @ 0.52A |
| Diagnostics | Open/short, out-of-range, rate-of-change, CJC health, telemetry |
| Firmware | Field-upgradeable via JTAG |
| Conformal Coating | Standard |
| MTBF | >290,000 hours |
Advantages
-
TC-Dedicated – Optimized for thermocouples only.
-
20-Bit ADC – Industry-leading resolution.
-
Improved CJC – ±0.22°C accuracy (better than 1A1A).
-
2200V Isolation – Enhanced protection.
-
Faster Sampling – 750 Hz (up from 500 Hz).
-
Conformal Coating Standard – Harsh environment ready.
-
Hot-Swap Capable – IEEE 1101.11 compliant.
Applications
| Industry | Use |
|---|---|
| Gas Turbines | EGT monitoring, combustion mapping (Frame 6B/7E/9E) |
| Steam Turbines | High-pressure steam temp, bearing monitoring |
| Combined Cycle | HRSG superheater/reheater temp |
| Oil & Gas | LM2500/LM6000 exhaust temp |
Comparison
| Feature | DS3800HMPJ1A1D | DS3800HMPJ1A1A | DS3800HMPJ (Flagship) | DS3800HMAC1H1F |
|---|---|---|---|---|
| ADC | 20-bit (17.8 eff.) | 20-bit (17.5 eff.) | 20-bit (18 eff.) | 18-bit (16.8 eff.) |
| Accuracy | ±0.04% | ±0.05% | ±0.03% | ±0.04% |
| CJC | ±0.22°C | ±0.25°C | ±0.2°C | ±0.4°C |
| Sampling | 750 Hz | 500 Hz | 1000 Hz | 1000 Hz |
| Isolation | 2200V | 2000V | 2500V | 2500V |
| Firmware | JTAG | JTAG | JTAG+USB | JTAG |
| Conformal | Standard | Standard | Standard | Standard |
| MTBF | 290k hrs | 280k hrs | 300k hrs | 280k hrs |
Selection
| Scenario | Choice |
|---|---|
| Existing 1A1D install | Keep if acceptable; spares limited. |
| New EGT system | Use full DS3800HMPJ (better specs). |
| Need outputs | Use DS3800HMAC1H1F. |
| TMR | Three identical 1A1D modules. Do not mix revisions. |
| Non-GE | Do not use – VME only. |
Critical Precautions
-
Authenticate – Check GE hologram, serial number.
-
ESD – Wear grounded wrist strap.
-
Backplane – Verify +5V, +15V, -15V before insertion.
-
Wiring – Must use TC-grade extension wire. Shielded cable, ground one end only.
-
Torque – 0.5-0.6 Nm.
-
CJC – Avoid heat sources near terminal block.
-
Temp – Keep rack <70°C.
-
Warm-up – Allow 30 minutes for CJC stabilization.
-
Firmware – Verify Mark V V5.05+ compatibility.
-
Sourcing – Authorized GE distributors or certified repair centers only.
Final Summary
The General Electric DS3800HMPJ1A1D is a mid-life HMPJ revision offering 20-bit ADC, ±0.04% accuracy, ±0.22°C CJC, 750Hz sampling, and 2200V isolation. It outperforms the 1A1A variant but lags behind the flagship DS3800HMPJ (±0.03%, 1000Hz, 2500V, USB firmware). Use only for existing installations with identical spares. For new builds, choose DS3800HMPJ (best TC-dedicated) or DS3800HMAC1H1F (universal with outputs). Source from authorized channels.
ABB DO810
A-B 22F-D4P2N103
SCHNEIDER TSXAEY800
Reviews
There are no reviews yet.