Description
Technical Parameters
| Parameter | Specification |
|---|---|
| Analog Inputs | 8 differential, thermocouple-dedicated |
| Input Types | TC (J,K,T,E,R,S,B) only |
| Analog Outputs | None (input-only) |
| ADC Resolution | 16-bit (effective: 14.5 bits) |
| Sampling Rate | 10-50 Hz per channel (fixed) |
| Accuracy | ±0.12% FS (25°C); ±0.28% (-40°C to +85°C) |
| CJC Accuracy | ±0.5°C (integrated) |
| Isolation | 1500V RMS (field-to-backplane) |
| CMRR | >85 dB at 50/60 Hz |
| Operating Temp | -40°C to +85°C |
| Power Supply | +5V @ 1.0A; +15V @ 0.4A (VME backplane) |
| Power Dissipation | 8W max |
| Diagnostics | Open-circuit detection, out-of-range alarms, basic CJC status |
| Form Factor | 6U VME (single-slot) |
| Firmware | Factory-programmed (not field-upgradeable) |
| MTBF | >200,000 hours |
Advantages and Key Features
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Thermocouple-Dedicated – Optimized for TC signals only; no unnecessary circuitry.
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Good CJC Accuracy – ±0.5°C integrated cold-junction compensation.
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1500V Isolation – Enhanced protection over earlier 1000V revisions.
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16-Bit ADC – Good resolution for temperature measurement.
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Open-Circuit Detection – Burnout detection with upscale drive.
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Hot-Swap Capable – IEEE 1101.11 compliant.
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ITS-90 Linearization – Full thermocouple standard tables.
Application Fields
| Industry | Applications |
|---|---|
| Power Generation | GE Frame 6B/7E/9E gas turbines – EGT monitoring |
| Steam Turbines | GE D-11/D-15 – high-pressure steam temperature |
| Combined Cycle | HRSG superheater/reheater outlet temperature |
| Oil & Gas | LM2500 – turbine exhaust temperature |
Comparison with Other GE Revisions
| Feature | DS3800HMPF1E1F | DS3800HMPF1E1E | DS3800HMPF | DS3800HMAC1H1F |
|---|---|---|---|---|
| ADC Resolution | 16-bit (14.5 eff.) | 16-bit (14.5 eff.) | 16-bit (15 eff.) | 18-bit (16.8 eff.) |
| Accuracy | ±0.12% | ±0.12% | ±0.08% | ±0.04% |
| CJC Accuracy | ±0.5°C | ±0.5°C | ±0.3°C | ±0.4°C |
| Max Sampling | 50 Hz | 50 Hz | 100 Hz | 1000 Hz |
| Isolation | 1500V | 1500V | 1500V | 2500V |
| Firmware Upgrade | No | No | No | Yes |
| Conformal Coating | No | No | Optional | Standard |
| MTBF | 200k hrs | 200k hrs | 210k hrs | 280k hrs |
Note: The 1E1F, 1E1E, and 1E1D are nearly identical in hardware; the suffix difference typically indicates a minor calibration variation or specific customer firmware. Verify compatibility with your Mark V system before use.
Competitor Comparison:
| Feature | DS3800HMPF1E1F | Siemens 6ES7531-7KF00 | ABB AI810 |
|---|---|---|---|
| Platform | GE VME Speedtronic | S7-1500 (Profinet) | ABB 800xA |
| VME Native | Yes | No | No |
| CJC Accuracy | ±0.5°C | ±0.5°C (external) | ±1.0°C |
| Isolation | 1500V | 500V (group) | 2500V |
| Hot-Swap | Yes | No | Yes |
Selection Recommendations
| Scenario | Recommendation |
|---|---|
| Existing installation with 1E1F | Continue use if acceptable; spares are limited. |
| Need improved accuracy | Upgrade to DS3800HMPF (±0.08%, ±0.3°C CJC). |
| Need outputs | Use DS3800HMAC1G1E or DS3800HMAC1H1F. |
| Need highest accuracy/speed | Upgrade to DS3800HMAC1H1F (18-bit, 1000Hz, 2500V). |
| Triple-redundant | Use three identical 1E1F modules. Do not mix with 1E1D/1E1E or other revisions. |
| Non-GE retrofit | Do not use – strictly for VME Speedtronic. |
| Spare stock | Limited – source refurbished units from certified centers. |
Critical Precautions
Pre-Installation
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Authenticate module – Check GE hologram labels; verify serial number.
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Inspect connectors – Check P1/P2 for bent pins or corrosion.
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Firmware note – Factory-programmed; cannot be field-updated.
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Verify calibration – 1E1F vs 1E1D/1E1E may have different calibration profiles; confirm with GE documentation.
Installation
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ESD protection – Wear grounded wrist strap; handle by edges only.
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Backplane voltage – Verify +5V (±2%), +15V (±1.5%), -15V (±1.5%).
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Insertion – Align guides; apply even pressure; tighten screws to 0.4-0.6 Nm. Never force.
Field Wiring (Critical for TC)
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Cable – Must use thermocouple-grade extension wire matching TC type. Copper wire introduces errors.
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Shielding – Belden 8760 or equivalent; ground shield only at module end.
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Separation – 30cm from AC power; 60cm from VFD cables; cross at 90° if unavoidable.
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Torque – 0.5-0.6 Nm.
Environmental
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CJC stability – Avoid heat sources or air vents near terminal block.
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Operating temp – -40°C to +85°C; keep rack <70°C.
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Warm-up – Allow 30 minutes for CJC stabilization.
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Humidity – 5-95% RH non-condensing.
Procurement
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Authentic sourcing – Obsolete; source from certified GE repair centers only.
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Refurbished units – Request CJC calibration certificate and 1-year warranty.
Final Summary
The General Electric DS3800HMPF1E1F is a late-stage, now-obsolete dedicated thermocouple input module for GE Speedtronic systems. It is nearly identical to the 1E1D and 1E1E variants, with the suffix difference typically indicating minor calibration or firmware variations. It offers 16-bit ADC, ±0.12% accuracy, ±0.5°C CJC, and 1500V isolation—significant improvements over early 1A/1B/1C revisions. However, it is still outperformed by the later base DS3800HMPF (±0.08%, ±0.3°C CJC) and significantly by the DS3800HMAC1H1F (18-bit, 1000Hz, 2500V, field-upgradeable firmware, standard conformal coating).
Only consider the General Electric DS3800HMPF1E1F for maintaining existing installations with identical spares. For upgrades, choose the DS3800HMPF (TC-dedicated, better accuracy) or DS3800HMAC1H1F (universal with outputs, highest performance). Source refurbished units exclusively from certified GE repair centers with valid calibration certificates. Ensure compatibility between 1E1F and your Mark V system—consult GE documentation before deployment.
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