GE Hydran 201i, Instruction Manual

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Part 17997 Rev. 6, March 2011 A-1
Appendix A
Technical Specifications for the Hydran 201 i System
A.1 HYDRAN 201T I INTELLIGENT TRANSMITTER
GENERAL
Description Continuous, on-line, intelligent gas-in-oil transmitter
Components Sensor and electronic modules housed in cylindrical enclosure
Gas Response Hydrogen (H
2
), carbon monoxide (CO), acetylene (C
2
H
2
), ethylene (C
2
H
4
)
Medium Mineral, insulating oil for transformers
Application Transformer monitoring; specifically, detection of incipient faults in oil-filled,
electrical equipment
ANALYTICAL PERFORMANCE
Principle Gas-permeable membrane and combustible gas detector
Sampling Method Flooded port with 1-in NPT male threads
Measurement Range 0–2,000 ppm (volume/volume, H
2
equivalent); other ranges are available
Accuracy For 0–2,000 ppm range: ± 10 % of reading ± 25 ppm (H
2
equivalent)
Relative Sensitivity • H
2
: 100 % of concentration
• CO: 18 ± 3 % of concentration
• C
2
H
2
: 8 ± 2 % of concentration
• C
2
H
4
: 1.5 ± 0.5 % of concentration
Response Time 10 minutes (90 % of step change)
External Sampling
Port
Designed for glass syringe with Luer stop cock; closed with 5/32-in Allen
screw
ELECTRONIC UNIT
Hardware Microprocessor; watchdog; clock
Software Real-time operating system; menu-driven interface
Functions • Gas level, hourly trend and daily trend readings
• Gas level, gas trends and fail alarms
• History logging
• Periodic sensor test
• Calibration, configuration and self-test
• Networking
• Remote control via Hydran 201C
i
Controller (optional modem)
• Remote, embedded software upgrading
Communications User selection (one port at a time):
• RS-232 link (DB-9 connector) to connect host computer
• Supervisory link to connect H201C
i
Controller