GE Hydran M2-X - Appendix A. Technical Specifications; General Specifications; Analytical Performance

Page 145
Hydran* M2-X Instruction Manual
MA-029 Rev. 1.0, 30-Jul-18
Appendix A. Technical Specifications for the Hydran M2-X
A-1. General
GENERAL
Description
Continuous, on-line, intelligent gas-in-oil and moisture
transmitter with optional, external sensors monitoring
Components
Combined dual-function sensor and electronic enclosure
Response
Hydrogen (H
2
), carbon monoxide (CO), acetylene (C
2
H
2
), ethylene
(C
2
H
4
), relative humidity in oil (%RH)
Medium
Mineral, insulating oil for transformers
Application
Transformer monitoring, moisture level measurement (for the
evaluation of dangerous conditions, bubbling temperature and
aging rate) and detection of incipient faults in oil-filled electrical
equipment
ANALYTICAL PERFORMANCE
Principle
• Gas: Vacuum-resistant gas-permeable membrane and
combustible gas detector
• Moisture: Thin-film capacitive sensor
Sampling Method
• Flooded port with 1.5 in NPT male threads
Measurement
• Gas: 25-2,000 ppm (volume/volume, H2 equivalent)*
Range
• Moisture: 0-100% RH
Accuracy
• Gas: ± 10 % of reading ± 25 ppm (Ref.: ASTM D3612)
• Moisture: ± 2 %RH (Ref.: saturated salt solutions)
Repeatability
Limit
• Gas: Better than ± 5 % or ± 5 ppm
• Moisture: 2 %RH
Gas Relative
• H2: 100 % of concentration
Sensitivity
• CO: Typical 15 ± 4 % of concentration
• C2H2: Typical 8 ± 2 % of concentration
• C2H4: Typical 1.5 ± 0.5 % of concentration
Response Time
• 10 minutes sensor response (90 % of step change)