Dwyer SF2 - Manual (Page 2)

Electrical Data
Input power and output are connected via a
multi-conductor, PVC-jacketed 24" cable.
Color codes are shown below:
+VAC/VDC
Ground
N.O. Contact
N.C. Contact
Common
Red
Black
White
Brown
Green
WARNING
When determining chemical compatibility of
materials of construction, the flow media and
application-associated environmental condi-
tions should be carefully considered.
Switch Set Point Calibration with LED Signal
With the unit installed in the line and power supplied, complete the following steps to calibrate
switch actuation point with proper flow rate. A small flat-blade screwdriver is all that is required.
1/2" Strain Relief Hole
LED Indicator Is Illuminated
When Relay Switch Is
Closed. Aids Field
Calibration. Cable
Output
Set Point
Adjustment
1. Adjust liquid flow in the line to the rate
at which actuation is desired.
Insert screwdriver into opening on
backside of housing and fit blade into
the potentiometer adjustment screw
inside.
If LED is not illuminated, slowly turn
screwdriver counter-clockwise and
stop as soon as LED illuminates.
If LED is illuminated, turn screwdriver
clockwise until LED light goes out.
Then, slowly turn screwdriver
counter-clockwise and stop as soon
as LED illuminates.
2.
3.
4.
Brass
Ceramic
PPS Composite/Teflon/PPS Composite
Polysulfone
Buna N/Viton
200 PSIG @ 70°F 80 PSIG @ 212°F
212°F (100°C)
150°F (65.5°C)
200 SSU
12 VDC, 24 VDC or 110 VAC
1 Amp, 24 VDC Resistive 0.5 Amp, 110 VAC
2% Maximum Deviation
±5%
15% Maximum
22 AWG PVC-Jacketed, 24" Cable. Color codes: Red = +VAC/VDC;
Black = Ground; White = N.O. Contact; Brown = N.C. Contact; Green = Common.
Wetted Materials
Body
Rotor Pin
Rotor
Lens
O-Ring
Operating Pressure, Max.
Operating Temperature, Max.
Brass Body
Electronics
Viscosity, Max.
Input Power
Relay Contact Ratings (SPDT)
Repeatability
Set Point Accuracy (Factory Set)
Set Point Differential
Electrical Termination
Specifications
Panel Mounting
Any SF-2 sensor may be panel mounted using holes integrated into the bodies:
Two (2) mounting holes are provided on the body centerline, as shown below.
#8-32UNC-2B screws are required for mounting.
1/4" &1/2"
2.50"
3.06"
3/4" & 1"
3.94"
2.5"