Specifications And Model Selection Guide; Specifications - Honeywell 7866 Operation And Maintenance Manual

2. Specifications and Model Selection Guide

2.1

Specifications

Accuracy ± 2 % of span (output signal) at reference conditions for binary gas mixtures
Within ± 2 % of span for most standard ranges. If linearity exceeds ± 2 % a correction curve is
Linearity
supplied with the analyzer.
Accuracy:
Meter
Digital Indication:
Repeatability Short term: ± 0.3 % of span
24 hour: ± 1 % of span
Reproducibility
Response Time Maximum, for 4 cfh (2000 cc/min.) flow:
For H
For CO
Maximum Drift Zero: ± 2 % of span per week maximum
Span: ± 2 % of span per week maximum
Ambient At sensing unit: Depends on range; typically less than 1 % F.S. over entire temperature range
Temperature
Influence
± 0.01 % of span per inch H
Atmospheric
Pressure Influence
Sample Flow Rate Less than ± 0.5 % of span over flow range of 0.2 to 4 cfh (100 to 2000 cc/min)
Influence
Line Voltage Maximum 0.02 % of span for each 1 % change of line voltage
Influence
Measuring Range Triple Range Analyzer
Three ranges—Range 1 measures CO
H
Single Range Analyzer
One range, as specified. For standard ranges, see Selection Guide Table in the Model Selection
Guide.
Explosion Proof Applications
oxygen concentration must not exceed 21%.
9/06 7866 Triple Range Digital H
± 2 % of span
± 0.1 %
; initial, less than 1 second;
2
63 %: 13 seconds
90 %: 23 seconds
99 %: 40 seconds
; Initial, less than 2 seconds;
2
63 %: 24 seconds
90 %: 45 seconds
99 %: 80 seconds
in Air
2
When measuring flammable gas mixture that contains oxygen, the maximum
and CO
2 2
Specifications and Model Selection Guide
Performance
O (± 0.05 % of span per mm Hg)
2
Operating
in Air, Range 2 measures H
2
Analyzer/Indicator - Operation and Maintenance
in CO , and Range 3 measures
2 2
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