Figure 1-4 Triple-Range Hydrogen And Carbon Dioxide Analyzer Controller And Display Logic Chart - Honeywell 7866 Operation And Maintenance Manual

Introduction
Microampere Signal Microampere Signal Microampere Signal Microampere Signal
from Sensor from Sensor from Sensor from Sensor
Zero and Span Limits Zero and Span Limits
R1 ZERO = Range 1 Zero R1 ZERO = Range 1 Zero
R1 SPAN = Range 1 Span R1 SPAN = Range 1 Span
R2 ZERO = Range 2 Zero R2 ZERO = Range 2 Zero
R2 SPAN = Range 2 Span R2 SPAN = Range 2 Span
R3 ZERO = Range 3 Zero R3 ZERO = Range 3 Zero
R3 SPAN = Range 3 Span R3 SPAN = Range 3 Span
Figure 1-4 Triple-Range Hydrogen and Carbon Dioxide Analyzer Controller
6 7866 Triple Range Digital H
Lower Display Lower Display Lower Display Lower Display
RANGE x = RANGE x = RANGE x = RANGE x =
Select Range 1, 2, or 3 Select Range 1, 2, or 3
OR OR OR OR
Gas being measured Gas being measured
Select Range Select Range Select Range Select Range
0% CO 0% CO (100% Air) (100% Air) (100% Air) (100% Air)
2 2
Range 1 = Range 1 = Range 1 = Range 1 =
1 1 1 1
% Carbon Dioxide vs. Air % Carbon Dioxide vs. Air vs. Air vs. Air
100% CO 100% CO
(0% Air) (0% Air) (0% Air) (0% Air)
2 2 2 2
0% H 0% H (100% CO (100% CO ) )
2 2 2 2
2 2
Range 2 = Range 2 = Range 2 = Range 2 =
2 2 2 2
% Hydrogen vs. CO % Hydrogen vs. CO vs vs
2 2
(0% CO (0% CO ) )
100% H 100% H
2 2 2 2
2 2
100% H 100% H
(0% N (0% N (0% N (0% N ) ) ) )
2 2 2 2
2 2 2 2
Range 3 = Range 3 = Range 3 = Range 3 =
3 3 3 3
% Hydrogen vs. Air % Hydrogen vs. Air
vs. Air vs. Air
75% H 75% H (25% N (25% N (25% N (25% N ) ) ) )
2 2 2 2
2 2 2 2
and Display Logic Chart
and CO Analyzer/Indicator - Operation and Maintenance
2 2
Upper Display Upper Display Upper Display Upper Display
Selected Range Selected Range
0 -100% 0 -100% -100% -100%
Carbon Dioxide Carbon Dioxide Carbon Dioxide Carbon Dioxide
Purge Purge Purge Purge
Hydrogen Fill Hydrogen Fill Hydrogen Fill Hydrogen Fill
Hydrogen Monitor Hydrogen Monitor Hydrogen Monitor Hydrogen Monitor
Out put Signal Out put Signal Out put Signal Out put Signal
0/4-20 mA 0/4-20 mA 0/4-20 mA 0/4-20 mA
Range 3 Alarms Range 3 Alarms Range 3 Alarms Range 3 Alarms
Low Low Low Low
98.0 98.0 98.0 98.0
Alarm 1 Alarm 1 Alarm 1 Alarm 1
Low-Low Low-Low Low-Low Low-Low
Alarm 2 Alarm 2 Alarm 2 Alarm 2
90.0 90.0 90.0 90.0
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