The Model 3020T is a microprocessor-based instrument for detecting oxygen at the parts-per-million (ppm) level in a variety of gases. This instrument serves as the explosion-proof, bulkhead-mount version of the 3000 Series. Simple menu choices, externally accessible command switches, and dual LCD and LED displays make setup and operation clear and quick.
Analysis Ranges
Three user-configurable ranges are standard, with an excellent linearity precluding the need to recalibrate when changing ranges. Two fully programmable concentration alarms satisfy nearly any requirement. All features offer a sophistication that assures years of service.
Convenience
Two standard 0-1 VDC and two 4-20 mADC isolated outputs provide both concentration and range identification. A bi- directional RS-232 serial interface is incorporated to relay information to a host computer for remote monitoring of critical functions.
Interface
All controls and displays are available from outside the housing. The instrument has two simple operator controls. A digital meter, an alphanumeric display, and a sample flow meter give the operator constant feedback.
Options
C Integrally mounted cal/zero valves
V Plumbed for vacuum service
F Flame arrestors for Class 1, Div 1, Group C/D service
G Flame arrestors for Class 1, Div 1, Group C/D service with cal valves
H Flame arrestors for Group B (hydrogen) service
I Flame arrestors for hydrogen service with cal valves
S Stainless steel cell block
• An explosion proof NEMA 4/7 rated enclosure
• 2-line alphanumeric display screen, driven by micro-processor electronics continuously prompting and informing the operator
• High resolution, accurate readings of oxygen content from low ppm levels through 25%
• Advanced Micro-fuel Cell designed for trace analysis, with a one year warranty and an expected life of two years
• Versatile analysis over a wide range of applications
• Microprocessor based electronics: 8-bit CMOS micro- processor with 32kB RAM and 128kB ROM
• Three user-definable output ranges (from 0-10 ppm through 0-250,000 ppm) assuring a perfect match for the user’s process
• Air-calibration range for convenient spanning at 20.9%
• Auto-ranging automatically selects the proper preset range for a given measurement. Manual override allows the user to lock onto a specific range of interest
• Two adjustable concentration alarms and a system failure alarm
• Extensive self-diagnostic testing at start-up and on demand with continuous power-supply monitoring
• Two way RS-232 serial digital port for use with a computer or other digital communication device
• Four analog outputs; two for measurement (0-1 VDC and isolated 4-20 mADC) and two for range identification
• NEC and ATEX rated configurations
• Monitoring inert gas blanketing
• Air separation and Liquefaction
• Chemical reaction monitoring
• Semiconductor manufacturing
• Petrochemical process control
• Quality assurance
