Honeywell SMV800 - Table 2-1: Pre-Programmed Engineering Units for DP

Page 18 SMV800 Modbus User's Guide Revision 1.0
Engineering Units
The Differential Pressure Config tab displays the Lower Range Value (LRV), Low Range Limit (LRL),
Upper Range Value (URV) and Upper Range Limit (URL) for DP in the unit of measure selected in the
Engineering Units field “Diffrential Pressure Unit”.
DP Engineering Units
Select one of the preprogrammed engineering units in Table 2-1 for display of the DP measurement.
Table 2-1: Pre-programmed Engineering Units for DP
Engineering Unit
Meaning
inH2O @ 39F d
Inches of Water at 39.2 °F (4 °C)
inH2O @ 68F
Inches of Water at 68 °F (20 °C)
mmHg @ 0C
Millimeters of Mercury at 0°C (32 °F)
psi
Pounds per Square Inch
kPa
Kilopascals
M Pa
Megapascals
mbar
Millibar
bar
Bar
g/cm
2
Grams per Square Centimeter
Kg/cm
2
Kilograms per Square Centimeter
inHg @ 32F
Inches of Mercury at 32 °F (0 °C)
mmH2O @ 4C
Millimeters of Water at 4°C (39.2 °F)
mH2O @ 4C
Meters of Water at 4 °C (39.2 °F)
ATM
Normal Atmospheres
inH2O @ 60F
Inches of Water at 60 °F (15.6 °C)
LRV and URV
The Lower Range Value and the Upper Range Value fields for DP are found on the Differential
Pressure Config tab.
DP Range Values
Configure LRV and URV outputs for the differential pressure input.
• LRV = Enter the desired lower range value
• URV = Enter the desired upper range value
(default = 100 inH2O@39.2 °F for SMV models SMA845 and SMG870)
(default = 10 inH2O@39.2 °F for SMV models SMA810)
Damping
Adjust the damping time constant for Differential Pressure to reduce the output noise. Default
value of damping is 0.5 seconds.