Emerson 755A manual 18

Instruction Manual

245364-V May 2002

Model 755A

1-7 SPECIFICATIONS

a.	General1
	Operating Range ...........................	0.00% to 100.0% oxygen
	Recorder Range ............................	Selectable for 0% to 100% oxygen or for any desired span of 1%,
		2%, 5%, 10%, 20% or 100% oxygen within the overall range.
	Response Time .............................	(90% of fullscale) recorder output factory set for 20 seconds;
		adjustable from 5 to 25 seconds.
	Reproducibility (Digital Display).....	±0.01% Oxygen ±2 counts.
	Ambient Temperature Limits
	Maximum ...............................	49°C (120°F) EXCEPT 38°C (100°F) for 99% to 100% oxygen.
	Minimum ................................	-7°C (20°F) EXCEPT 4°C (40°F) for 99% to 100% oxygen.
	Zero and Span Drift2......................	Within ±1% of fullscale (±2% of fullscale for 99% to 100% range)
		per 24 hours, provided that ambient temperature does not change
		by more than 11.1°C (20°F).
		±2.5% of fullscale per 24 hours with ambient temperature change
	Barometric Pressure	over entire range.
	Compensation .......................	Oxygen readout automatically corrected to within ±1% of fullscale
		for barometric pressure variations within ±3% of target value and
		within ±2% of fullscale for barometric pressure variations within
		±5% of target value.
		The target may be set anywhere within range of -2.7 to 3.3 psig ±3
		psig (-18.6 to 22.8 kPa ±21 kPa).
		Exhaust vented to atmosphere.
b.	Sample
	Dryness .........................................	Sample dewpoint below 43°C (110°F), sample free of entrained
		liquids.
	Temperature Limits
	Maximum ...............................	66°C (150°F)
	Minimum ................................	10°C (50°F)
	Operating Pressure
	Maximum ...............................	69 kPa (10 psig).
	Minimum ................................	-13.1 kPa (-1.9 psig)
	Flow Rate 3
	Maximum ...............................	500 cc/min
	Minimum ................................	50 cc/min
	Recommended ......................	250 ±20 cc/min
	Materials in Contact with
	Sample Gas...........................	316 stainless steel, glass, titanium, Paliney No. 7, epoxy resin,
		Viton-A, platinum, nickel.

1Performance specifications based on recorder output.

2Zero and span drift specifications based on following conditions: Operating pressure constant; ambient temperature change from initial calibration temperature, less than 11.1 Celsius degrees (20 Fahrenheit degrees); deviation from set flow held to within ±10% or ±20 cc/min, whichever is smaller.

3Deviation from set flow would be held to within ±10% or ±20 cc/min, whichever is smaller. If so, zero and span drift will be within specifications, provided that operating temperature remains constant.

1-4 Description and Specifications Rosemount Analytical Inc. A Division of Emerson Process Management