Emerson 755A 用户手册
Instruction Manual
245364-V
May 2002
Rosemount Analytical Inc. A Division of Emerson Process Management Description and Specifications 1-5
Model 755A
c. Electrical
Supply Voltage and Frequency
Standard ................................ 115 VAC
±10 VAC, 50/60 Hz
Optional ................................. 230 VAC
±10 VAC, 50/60 Hz
Power Consumption
Maximum ............................... 300 watts
Nominal.................................. 75 watts
Nominal.................................. 75 watts
Output
Standard ................................ Field selectable voltage output of 0 to 10mV, 0 to 100mV, 0 to 1V,
or 0 to 5VDC
Optional ................................. Isolated current output of 0 to 20mA or 4 to 20mA (with Current
Output Board)
Alarm Option.................................. High-Low Alarm
Contact Ratings ..................... 5 amperes, 240V AC, resistive load
5 amperes, 120V AC, resistive load
5 amperes, 28V DC, resistive load
5 amperes, 28V DC, resistive load
Setpoint ......................................... Adjustable from 1% to 20% of fullscale
Deadband ...................................... Adjustable from 1% to 20% of fullscale (Factory set at 10% of
Deadband ...................................... Adjustable from 1% to 20% of fullscale (Factory set at 10% of
fullscale)
d. Physical
Mounting
Standard ................................ Panel mount
Optional ................................. Surface or stanchion mount accessory available
Optional ................................. Surface or stanchion mount accessory available
Enclosure Classification ................ Meets requirements for NEMA 3R
Air Purge Option
1
................... NFPA 496 (1989) Type Z purge
Weight ........................................... Approximately 32.5 lbs (14.74 Kg)
Dimensions.................................... Height: 13.5 (343 mm)
Dimensions.................................... Height: 13.5 (343 mm)
Width: 11.5 (294 mm)
Depth: 7.12 (181 mm)
Depth: 7.12 (181 mm)
1
When installed with user supplied components, meets requirements for Class I, Division 2 locations per National Electrical
Code (ANSI/NFPA 70) for analyzers sampling nonflammable gases. Analyzers sampling flammable gases must be pro-
tected by a continuous dilution purge system in accordance with Standard ANSI/NFPA 496-1986, Chapter 8. Consult factory
for recommendations.
tected by a continuous dilution purge system in accordance with Standard ANSI/NFPA 496-1986, Chapter 8. Consult factory
for recommendations.