General Monitors' Automatic Remote Gas Calibrator can be operated manually or electronically
Calibrating the Model S4000CH Combustible Gas Detector with a remotely installed sensor is now easier with the Automatic Remote Gas Calibrator (ARGC) from General Monitors. The ARGC addresses the need for more convenient and expedient maintenance routines by allowing calibration gas to be applied to the catalytic bead sensor from easily accessible locations.
The ARGC consists of a Remote Gas Calibrator (RGC) and a solenoid valve. The ARGC blocks ambient air and re-directs the calibration gas to the catalytic bead sensor for calibration or testing sensor accuracy. The instrument can calibrate gases at wind velocities as high as 50 mph and maximum temperatures of 75°C. After connecting the ARGC to any S4000CH Detector, the calibrator can be operated manually or electronically via HART or Modbus, or the magnet menu.
A number of lighter-than-air combustible gases are common hazards that collect in ceilings, turbines, ducts and other spaces. Because these gases typically accumulate above work areas and equipment, the gas detectors must be placed in elevated locations where the gas will rise and come into contact with their sensors. Performing routine maintenance on combustible gas detectors in these areas is often difficult, requiring scaffolding, ladders or lifts to bring the technicians to the sensors. If the detector is in a confined space, a special permit may be needed to access the device. Invariably, maintenance is hardly routine in these cases and often requires extra precautions and technician time.
The ARGC is easy to install and use, requiring no electrical wiring or connectors. For fully automatic operation from a control room, the two bidirectional protocols (HART and Modbus) are utilized.
The S4000CH is a hydrocarbon gas detector suitable for use in SIL 3 applications and approved by FM, CSA, ATEX and GOST. It features a three-digit display and an explosion-proof housing, which allows all data to be processed locally at the sensor site. The S4000CH is also available with an optional relay configuration that is appropriate for SIL 2 processes. The S4000CH features one-person calibration for ease of maintenance.