WattMaster OE230 - Airflow Sensor OE274; Specifications and Warnings; Installation Notes

Notes:
FILENAME
DATE:
B. CREWS
DESCRIPTION:
PAGE
DRAWN BY:
Airflow Sensor
1
JOB NAME
2.)All Wiring To Be In Accordance With Local And
National Electrical Codes And Specifications.
04/29/02
G-OE274TRAN1.CDR
OE274
Top View
Side View
OUT
IN
GND
UP
(-)LO
0.35"
0.55"
1.00"
2.20"
0.15" DIA.
0.15"
2.94"
2.50"
0.125" (1/8" Tubing Conn.)
0.200" (3/16" Tubing Conn.)
1.95"
0.60"
12.0" APPROX.
Full Scale Output
(Positive Pressure)
Null Offset
Span*
Minimum Typical Maximum
Hystereisis And Repeatability
Temperature Error
Null +10 To 40 C°°
Stability (1 Year)
Supply Voltage (Vs)
Pressure Overload
Burst Pressure
Positive Pressure (Hi Side)
Negative Pressure (Lo Side)
Positive Pressure (Hi Side)
Negative Pressure (Lo Side)
Non-Linearity
Span +10 To 40 C°°
Common Mode Pressure
0-1.5“ H O Pressure Range - 5 VDC Operation
2
3.92 VDC
0.17 VDC 0.2-0.3 VDC 0.33 VDC
3.59 VDC 3.91 VDC
±0.05 % Span
4.75 VDC 5.0 VDC
8.0 VDC
15 PSI
5“ H O
2
10“ H O
2
3“ H O
2
5“ H O
2
4.08 VDC
3.95-4.05 VDC
3.65-3.85 VDC
±0.3 % Span ±0.5 % Span
±0.03 % Span
±1.0 % Span
±0.5 % Span
±1.0 % Span
±1.5 % Span
±1.5 % Span
*Span Is The Algebraic Difference Between End Points (Null Offset And Full Scale Output)
The plastic housing on the sensor is electrically
conductive. Avoid contact with any electrical components.
It is acceptable to mount the sensor on grounded sheet
metal such as ductwork, electrical panels, etc.
Use extreme care when mounting the sensor to avoid
damage to the plastic housing. Do not overtighten the
mounting screws! Do not use mounting screws which are
too large for the holes!
Warning! Warning!
1.) The Airflow Sensor Should Be Mounted In
A Vertical Position As Shown With Arrow Pointing
Up. ( Tubing Connections Pointing Down). If This
Mounting Position Is Not Possible In Your
Application, It May Be Mounted In A Horizontal
Position. When Mounted In A Horizontal Position
Accuracy Will Be Affected By Approximately 2% Full
Scale Null Shift Due To Diaphragm Gravity Effect
Error.
Caution:
OE274 - Applications
Requiring 0-1.5“ H O Pressure Range
2
Airflow Sensor For
1.29"
OUT (Black)
GND (Green)
IN (Red)
±1 % Span
OE274
P.I. Sensor