ABB SM2000 User Manual Supplement page 11

...2.9.4 Relative Humidity – Fig. 2.6
Select the RH fuction
Select the wet bulb source
Select the dry bulb source
Set the engineering range
0 –100.0% RH
System Configuration
Common Process Group 1 Process
Configuration Group 1 Channels Group 2
Group 2
I/O Functions Logic
Channels Modules
Equations
Math Blocks
Math1
Math2 Math3 Math4 Math5 Math6
Equation
RH(
Source Id
None
Analog i/p A1
Analog i/p A2
Analog i/p A3
Analog i/p A4
Analog i/p A5
Analog i/p A6
RH(a1,
Source Id
None
Analog i/p A1
Analog i/p A2
Analog i/p A3
Analog i/p A4
Analog i/p A5
Analog i/p A6
RH(a1,a2)
0 to 100.0%
Engineering range
Engineering range
100
High
0
Low
% RH
Units
Fig. 2.6 Relative Humidity Example
2 MATH CONFIGURATION...
--->
Maths Equations
Analog I/P
Input Type 4.0 - 20.0 mA
Engineering range 0 to 20000 Litres/sec
Short tag 8 Character
Long tag 20 Characters
Filter time constant In seconds
Fault detect level (%)
110%
Broken sensor detection Upscale
Maths Equations
Analog I/P
Input Type 4.0 - 20.0 mA
Engineering range 0 to 20000 Litres/sec
Short tag 8 Character
Long tag 20 Characters
Filter time constant In seconds
Fault detect level (%) 110%
Broken sensor detection
Upscale
OK
9