一段英译中请教Output (analog)4-20 mA (source type),max.1000 ohm loa

一段英译中请教
Output (analog)
4-20 mA (source type),max.1000 ohm load
at 24 VDC supply voltage
Relay Operation
Selectable latching or non-latching
Selectable normally energized or
normally de-energized (except fault)
Selectable alarm relay off delays
Manual relay control
Housing Construction
Electronics - epoxy coated explosion-proof aluminum
housing
Sensor - anodized explosion-proof aluminum housing,
optional stainless steel
SEC Supervision Plus Hazard Event Monitoring Software
Infrared Hydrocarbon Gas Detectors
Non-Explosion Proof Gas Detectors
Data Logging/Graphics Software Packages
Optical UV/IR Flame Detectors
Fire Suppression Aerosol Generators
Portable Automatic Fire Fighting Systems
Halotron Systems
Twin Agent Units
Dry Chemical Mobile and Stationary Units
An on-board microprocessor provides continuous self-diagnostics and identifies problems using fault codes.Four (4) 8 amp SPDT relays respond to Low,Mid and High gas alarms as well as any fault conditions.Calibration gas values can be changed without opening the SEC 2000 housing,using the magnetic push-button switch for calibration.