Brand: GE
Category: Other
Document Type: Manual
Language: EN
Manual for TRANSFIX DGA 500
Uploaded: Nov. 21, 2025, 7:46 p.m.
Manual Publish Date: 2015-10-13
Warranty Information
None
The TRANSFIX DGA 500 is an on-line Dissolved Gas Analysis (DGA) system for transformer diagnostics. It measures key fault gases, moisture, and transformer load current. The system uses dynamic headspace sampling and photo-acoustic spectrographic technology. It features an IP55 rated enclosure, user-configurable relay contacts, and multiple communication options including Ethernet, IEC61850®, and cellular modems. Operation is managed via an LCD display panel and buttons, with data stored internally and downloadable to a PC. Maintenance includes cleaning air filters and oil filters, and battery replacement.
Troubleshooting and error codes
| Code | Error | Description |
|---|---|---|
| PGA Connection Error | The host board (the processor that the customer interfaces with) has lost communications with the Photo-acoustic Gas Analyzer (PGA). Therefore the host board cannot send a signal to the PGA to initiate a measurement. The product will remain in Standby mode with this error continuously displayed. | |
| 00 | Timeout | The product has exceeded a set time limit to perform an action. The product will abort the measurement. |
| 01 | Missing mains input | Incoming AC voltage is outside of expected range. The product will complete the measurement. This alarm is obsolete and has been disabled. |
| 02 | PGA power supply voltage too low | Voltage that powers the PGA has dropped below the expected voltage. The product will complete the measurement. The final values may not be reliable. |
| 03 | PGA chopper frequency outside range | The infrared energy is being pulsed at a frequency outside of the expected frequency. The product will abort the measurement. |
| 04 | PGA IR-source outside range | The infrared energy source feedback is outside of the expected range indicating the infrared energy source is either too weak or too strong. The product will abort the measurement. |
| 05 | Gas flow lower than limit | The flow of gas internal to the product is lower than expected. The product will complete the measurement. The final values may not be reliable. |
| 06 | Background noise/vibration too high | The PGA has detected excessive noise, which may be mechanical or electrical in nature. The product will complete the measurement. The final values may not be reliable. |
| 07 | Microphone test failed | The signal from the microphone(s) is (are) outside of the expected range. The product will complete the measurement. The final values may not be reliable. |
| 08 | Not level sensor 1 pulses (level) | Not used on the TRANSFIX family. |
| 09 | Not level sensor 3 (drain) | The product is testing the functionality of the drain level sensor during fault debugging and will trigger this service alarm if no oil is detected when oil is expected. The product will abort the measurement. |
| 10 | Fill level shows Oil | The product is expecting the gas extraction chamber (headspace) to be empty of oil and oil is detected at the full level sensor. The product will abort the measurement. |
| 11 | Over Fill shows Oil | The product has detected that too much oil is in the headspace. The product will abort the measurement. |
| 12 | PGA Air temperature outside limits | The internal temperature of the product is outside the expected range. The product will abort the measurement. |
| 13 | Bad communication with control PCB | No communication between the PGA and the circuit board that controls the pump, valves and various sensors. The product will abort the measurement. |
| 14 | Gas leak test: Pump pressure too low | The product performs a self-diagnostic gas leak test on every measurement cycle. 'Pump pressure too low' indicates the product was not able to pull a vacuum due to either a weak pump, blockage in the circuit or leak in the circuit. The product will complete the measurement. The final values may not be reliable. |
| 15 | Gas leak test: Pressure decay too high | The product performs a self-diagnostic gas leak test on every measurement cycle. 'Pressure decay too high' indicates the product was not able to maintain a vacuum due to a gas leak. The product will complete the measurement. The final values may not be reliable. |
| - | Not used on the TRANSFIX family. | |
| 16 | Oil temperature too low | The incoming oil temperature is below the expected range. The product will abort the measurement. |
| 17 | Oil temperature too high | The incoming oil temperature is above the expected range. The product will abort the measurement. |
| 18 | Oil pressure too low | The oil pressure internal to the product is below the expected range. This can be due to a blockage on the supply side of the oil circuit, often a closed valve or clogged filter, or no oil present at the supply valve on the transformer, sometimes seen when sampling from the top of a N2 blanketed transformer. The product will abort the measurement. |
| 19 | Oil pressure too high | The oil pressure internal to the product is above the expected range. This can be due to a blockage on the return side of the oil circuit, often a closed valve or clogged filter. The product will abort the measurement. |
| 20 | Oil pump tacho count too high | The number of pump cycles needed to either fill or drain the headspace with oil has exceeded the expected range. This can be a blockage on either the oil supply or oil return depending on when the error occurs. The product will abort the measurement. |
| 21 | Oil pump pressure too low | The oil pressure internal to the product when the oil pump is on is below the expected range. This can be due to a blockage on the supply side of the oil circuit, often a closed valve or clogged filter, or no oil present at the supply valve on the transformer, sometimes seen when sampling from the top of a N2 blanketed transformer. The product will abort the measurement. |
| 22 | Oil pump speed out of range | The feedback from the oil pump is outside the expected range indicating that the pump is not pumping at the correct speed. The product will complete the measurement. The final values may not be reliable. |
| 24 | Oil pump tacho count too low | The number of pump cycles needed to either fill or drain the headspace with oil is below the expected range. This can be due to an internal oil leak between the product's oil circuit and the headspace. The product will complete the measurement. The final values may not be reliable. |
| 25 | Oil pump not turning | There is no feedback from the oil pump indicating that the pump is not working. The product will abort the measurement. |
| 26 | Not used on the TRANSFIX family. | |
| 27 | Temperature Sensor(s) 1 disconnected | The product is not receiving a signal from one or more of the vital temperature sensors. The product will abort the measurement. |
| 28 | Temperature Sensor(s) 2 disconnected | The product is not receiving a signal from one or more of the less vital temperature sensors. The product will complete the measurement. The final values may not be reliable. |