Emerson 3081FG - Manual (Page 17)

Instruction Manual
IB-106-3081 Rev. 1.5
September 2002
Rosemount Analytical Inc. A Division of Emerson Process Management Description and Specifications 1-7
Model 3081FG
1-3 SPECIFICATIONS
Net O
2
Range....................................................................... 0 to 25% O
2
Fully Field Selectable via the HART Interface
Lowest Limit................................................................. 0.05% O
2
Highest Limit................................................................ 25.00% O
2
Accuracy .............................................................................. ±1.5% of reading or 0.05% O
2
, whichever is greater
System Response to Calibration Check Gas ...................... Initial response in less than 3 seconds
T90 in less than 10 seconds
PROBE
Lengths ................................................................................ 20 in. (508 mm)
26 in. (660 mm)
34.625 in. (880 mm)
Temperature Limits
Process Temperature Limits........................................ 550° to 1400°C (1022° to 2552°F)
Operation to 1600°C (2912°F) with reduced cell life.
Ambient........................................................................ -40° to 149°C (-40° to 300°F) Ambient
Mounting and Mounting Position ......................................... Vertical or Horizontal
Materials of Construction
Process Wetted Parts
Inner Probe .................................................................. Zirconia
Outer Protection Tube ................................................. Alumina [1600°C (2912°F) limit]
Inconel 600 [1000°C (1832°F) limit]
Probe Junction Box ..................................................... Cast aluminum
Speed of Installation/Withdrawal ......................................... 1 in. (25.4 mm) per minute
Hazardous Area Certification............................................... Intrinsically safe per EN50 014 (1977), clause 1.3(1)
Reference Air Requirement ................................................. 100 ml per minute (0.2 scfh) of clean, dry instrument
air; 1/4 in. tube fittings
Calibration Check Gas Fittings ............................................ 1/4 in. tube fittings
Cabling................................................................................. Two twisted pairs, shielded
(1) Thermocouple and O
2
probe cell are both unpowered, developing a millivolt emf, and are considered a
“simple apparatus” by certifying agencies.
1