Dwyer Instruments W.E. ANDERSON PFT Series Installation and operating instructions

Series PFT Paddlewheel Flow Sensor
Specications - Installation and Operating Instructions
Bulletin F-PFT
The Series PFT Paddlewheel Flow Sensor is used to monitor liquid ow rates in
pipes from 1-1/2 to 40˝ (40-1016 mm). The unit has one size-adjustable sensor. A
square wave output signal is generated with frequency proportional to ow velocity.
OPERATING PRINCIPLE
The PFT uses inductive sensing to sense the blades of the impeller as they rotate.
The sensor technology is non-magnetic, allowing for low ow rate monitoring and
eliminating concerns regarding magnetic material in the process media.
SPECIFICATIONS
Service: Water-based uids.
Range: 1.2 to 25 ft/s (0.37 to 7.62 m/s).
Wetted Materials: Body and tting: Brass or 316 SS; Fitting o-ring: FKM standard,
silicone or Buna-N optional; Impeller: 316 SS; Shaft: Tungsten carbide standard or
316 SS optional; Bearing: PTFE standard.
Linearity: ±1.0% of full range.
Repeatability: ±0.5% of full range.
Temperature Limits: -40 to 212°F (-40 to 100°C).
Pressure Limits: 400 psig (27.6 bar) @ 100°F (37.8°C), 325 psig (22.4 bar) @
212°F (100°C).
Process Connection: 1-1/2˝ NPT male standard, 2˝ NPT male optional; Isolation
valve option available with 1-1/2˝ connection (model selectable).
Output: Pulse: NPN open collector with square wave output, rated 60 V @ 50 mA
maximum. Frequency: 3.2 to 200 Hz. Pulse width: 2.5 msec ±25%. 4-20 mA: 4 mA
is 0 ft/s, 20 mA is 25 ft/s.
Power Requirement: 10-35 VDC.
Power Consumption: 40 mA (max.).
Electrical Connection: 22 AWG shielded UL type PTLC rated 105°C, 20´ (6.1
m) long with cable gland. Can be extended up to 2000´ (609 m) with similar
cable. Optional UL listed burial rated cable.
Enclosure Rating: NEMA 6P (IP67)*.
Housing Materials: Brass or 316 SS.
Weight: 3 lb.
Agency Approvals: CE.
*Brass units IP67 only.
1/2˝ NPT
Ø2-1/2
[63.50]
3-13/16
[96.84]
1-1/2˝ NPT
2-25/64
[60.72]
7-29/32
[200.94]
2˝ HEX
[50.80]
19.50
0
MAX
5.000
MAX
Ø1.125
MODEL CHART
Example PFT -I D N -B 1 1 1 -S -ST PFT-IDN-B111-S-ST
Series PFT Paddlewheel ow sensor
Style I
H
Insertion
Hot-tap insertion
Output D
A
600UA/40 MA 2.5 MS pulse
Analog 4-20 mA transmitter
Approvals N None
Body
Material
B
S
Brass body
316 SST body
Mounting 1
2
3
4
5
6
7
8
1-1/2˝ male NPT mounting
2˝ male NPT mounting
1-1/2˝ male BSPT mounting
2˝ male BSPT mounting
1-1/2˝ male NPT hot tap with
valve
1-1/2˝ male NPT hot tap without
valve
1-1/2˝ male BSPT hot tap with
valve
1-1/2˝male BSPT hot tap without
valve
O-Ring
Material
1
2
3
FKM uoroelastomer
Silicone (FDA approved)
Buna-N
Wetted
Materials
1
2
Tungsten-carbide shaft, 316 SS
impeller, PTFE bearing
316 SS shaft, 316 SS impeller,
PTFE bearing
Electrical
Connection
S
B
22 GA shielded wire, 20 ft (6.1 m)
18 GA UL listed burial rated, 4 ft
(1.2 m)
Options ST Stainless steel tag
PFT-HDN-B611-S
shown with
A-PFT-HKIT
PFT-HDN-S611-S
shown with
A-PFT-HKIT-SS
PFT-IAN-B111-S
W.E. ANDERSON
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
Phone: [phone]
Fax: [phone]
www.dwyer-inst.com
e-mail: [email protected]
A DIVISION OF
DWYER INSTRUMENTS, INC.
By Dwyer

Connecting Sensor to Fitting
For hot-tap installation, use a 1-3/8˝ (35 mm) hole saw bit to create the opening for
installation of the 1-1/2˝ full port ball valve.
It is recommended to use a weld-on or saddle female tting with 1-1/2˝ or 2˝ NPT
connection, depending on the sensor model. Use proper pipe sealant on sensor
threads. When threading the sensor into the tting use the wrench ats on the bottom
of the housing to prevent damage to the sensor.
The sensor must be aligned with the direction of ow. In order to align the sensor
properly, insert the 7/64 allen key into the alignment hole. Then, thread the sensor into
the tting, ensuring that the allen key is pointing downstream in the direction of ow.
Note: Do not turn the allen key and loosen the screw in the alignment hole.
Sensor Height
The sensor must be installed so that the impeller shaft is located 10% inside the
pipe ID. To install properly the sensor install height, “H” shown in Figure 2, must be
calculated and used. Table 2 on page 3 in this instruction manual has “H” dimensions
for standard pipe materials and sizes.
If your application pipe is not listed in Table 2 it will need to be calculated with the
following procedure:
1. Using a ruler measure the pipe ID and the pipe wall thickness.
Pipe Wall Thickness:_______ Pipe ID:_______
2. Use the following equation to gure “H”:
For Standard PFT:
H = 5.85 – Pipe Wall Thickness – (0.10 x Pipe ID)
H = _____
For PFT hot tap:
H = 11.85 – Pipe Wall Thickness – (0.10 x Pipe ID)
H = _____
Once “H” is known, adjust the sensor so that “H” is the distance from the bottom of the
sensor ange to the top of the pipe. The insertion height of the sensor is adjustable by
loosening the top and bottom nuts on the sensor ange and then moving the sensor
ange up or down as needed.
Final Sensor Alignment
The sensor must be aligned with the direction of ow. Insert the supplied 7/64 allen key
into the set hole in the side of the hex hole plug. Based on the initial installation, the set
hole should already be roughly aligned with the process ow.
If necessary, make nal alignment adjustments by loosening the three 3/32˝ set screws
around the sensor ange with the supplied allen key.
Once the set screws are loosened, replace the allen key in the alignment hole and
rotate the sensor in line with the downstream ow. The sensor can be rotated ±60°.
Note: Do not turn the allen key to loosen the screw in the alignment hole.
Once nal alignment is made, tighten the screws in the sensor ange and tighten the
height adjustment nuts.
Figure 2: Sensor install height
DIRECTION OF FLOW
PIPE
BOTT
OM OF
SENSOR FLANGE
ALIGNMENT ROD
H[2] 3/32 HEX DRIVE
ALIGNMENT SET
SCREWS
[DO NOT REMOVE]
INSTALLATION
Fitting Position
Bubbles, turbulence, and sediments will cause improper operation. For best operation,
mount 30° to 150° off vertical on horizontal runs (see Figure 1). Allow a straight run
of at least 10 pipe diameters upstream and 5 pipe diameters downstream to insure
optimal ow measurement. See Table 1 for recommendations for other mounting
requirements.
Ensure that the process uid is compatible with the wetted
materials.
Ensure that the system is not pressurized before installing or
removing this device or other objects from the system. The device
and/or object may become a projectile.
CAUTION
Table 1: Fitting location
Upstream Item Upstream Diameters Needed
Flange
Reducer
Valve/Pump
90° Elbow
10
15
50
20
Figure 1: Mounting orientation
30 ∞ 30 ∞
30 ∞ 30 ∞
OKOK
BUBBLES
[AVOID]
SEDIMENT
S
[AVOID]
Do not remove or unscrew the hex hole plugs.
Do not exceed the maximum device ratings.
NOTICE
WARNING
Be careful not to damage the signal wire during installation.
CAUTION
NOTICE

CALIBRATION TABLES
The PFT uses K factors for calibration. See Table 2 in this instruction manual for K
factors based on pipe type and size used in the application.
For 4-20 mA output version use the following equation to convert to ow rate.
q = (I-4) x K
Nomenclature:
q = Liquid volumetric ow rate
I = Transmitted mA output
K = K - factor. If use GPM/mA then q will be in U.S. GPM. If use LPM/mA then q will
be in LPM.
ELECTRICAL CONNECTION
Pulse Output Wiring
The PFT has a NPN open collector output. The output rating is 60V @ 50 mA maximum.
Typical wiring to a PLC or counter is shown in Figure 3 and Figure 4.
When wiring to a counter, select the Power Supply voltage and Dropping Resistor
according to the counter’s instructions and make sure the Power Supply is within the
10-35 VDC specication of the PFT.
To insure noise immunity, wire the shield conductor to an earth ground.
To replace any existing non-Dwyer ow sensors, the PFT can also be wired in a two-
wire pulse output, 600 μA / 40 mA conguration with the red and black leads only. Unit
needs 600 μA of power and produces 40 mA 2.5 ms pulses. Consult factory for details.
4-20 mA Output Wiring
Figure 3
Figure 4
Figure 5
AGENCY APPROVALS AND TEST STANDARDS
CE: CENELEC EN 55011: 2006
CENELEC EN 61326-1: 2006
IEC 61000-4-2: 2008
IEC 61000-4-3: 2006
IEC 61000-4-4: 2004
IEC 61000-4-5: 2005
IEC 61000-4-6: 2006
CENELEC EN 55022: 2006
2004/108/EC EMC DIRECTIVE
Note: For 4-20 mA output models only under the 10 V/M RF eld as specied in
IEC 61000-4.3, linearity may be as high as ±3.7%. Under normal ambient conditions
linearity is ±1%.
MAINTENANCE & REPAIR
Inspect and clean wetted parts at regular intervals. Disassembly or modications
made by the user will void the warranty and could impair the continued safety of the
product. If repair is required obtain a Return Materials Authorization (RMA) number
and send the unit, to the address below. Please include a detailed description of the
problem and conditions under which the problem was encountered.
Dwyer Instruments, Inc.
Attn: Repair Department
102 Indiana Hwy 212
Michigan City, IN 46360
PARTS
P-PFT-KITA: Contains impeller, PTFE bearings, cage bearing set screws, tungsten
carbide shaft
P-PFT-KITB: Contains impeller, PTFE bearings, cage bearing set screws, 316SS shaft
+
-
POWER SUPPLY
24 VDC
TYPICAL PLC HIGH SPEED
COUNTER INPUT
PFT
PWR
OUT
COM
RED
BLACK
WHITE
+
-
+
-
+
-
POWER SUPPLY
PULL UP
RESISTOR
PFT
PWR
OUT
COM
RED
BLACK
WHITE
+
-
-
COUNTER WITH
LOGIC LEVEL INPUT
+
+
-
POWER SUPPLY
4-20 mA
LOOP
RED
BLACK
WHITE - NO CONNECTION
+
-
-
RECEIVER
+

Sch 80 Plastic Pipe Per ASTM-D-1785
Pipe
Size
Height
“H”
Height for
Hot Tap
Version “H”
Pulse Output Current Output
K-FACTOR
PULSES/
U.S.Gallon
K-FACTOR
PULSES/
LITER
K-FACTOR
GPM/mA
K-FACTOR
LPM/mA
1.5
2
2.5
3
3.5
4
5
6
8
10
12
5.49
5.428
5.328
5.246
5.18
5.114
4.975
4.821
4.564
4.272
3.993
11.49
11.428
11.328
11.246
11.18
11.114
10.975
10.821
10.564
10.272
9.993
63.36
43.23
32.31
20.53
14.97
11.33
6.85
4.60
2.45
1.47
1.00
16.740
11.421
8.536
5.424
3.955
2.993
1.810
1.215
0.647
0.388
0.264
8.330
13.99
20.04
31.37
42.30
54.81
86.89
120.7
218.8
344.5
487.7
31.53
52.96
75.86
118.8
160.1
207.5
328.9
457.0
828.3
1304
1846
Sch 10S Stainless Steel Pipe Per ANSI B36.19
Pipe
Size
Height
“H”
Height for
Hot Tap
Version “H”
Pulse Output Current Output
K-FACTOR
PULSES/
U.S.Gallon
K-FACTOR
PULSES/
LITER
K-FACTOR
GPM/mA
K-FACTOR
LPM/mA
1.5
2
2.5
3
3.5
4
5
6
8
10
12
14
16
18
20
22
24
5.573
5.525
5.467
5.404
5.354
5.304
5.187
5.08
4.869
4.643
4.431
4.3
4.1
3.9
3.676
3.476
3.25
11.573
11.525
11.467
11.404
11.354
11.304
11.187
11.08
10.869
10.643
10.431
10.3
10.1
9.9
9.676
9.476
9.25
51.64
34.55
24.38
15.63
11.51
8.77
5.44
3.62
1.98
1.19
0.81
0.66
0.48
0.37
0.30
0.24
0.20
13.643
9.128
6.441
4.129
3.041
2.317
1.437
0.956
0.523
0.314
0.214
0.174
0.127
0.098
0.079
0.063
0.053
10.82
17.82
26.55
40.64
54.06
69.39
107.3
154.5
265.3
415.2
587.0
709.8
933.5
1188
1464
1778
2112
40.96
67.46
100.50
153.84
204.6
262.7
406.2
584.8
1004
1572
2222
2687
3534
4497
5542
6731
7995
Sch 40S Stainless Steel Pipe Per ANSI B36.19
Pipe
Size
Height
“H”
Height for
Hot Tap
Version “H”
Pulse Output Current Output
K-FACTOR
PULSES/
U.S.Gallon
K-FACTOR
PULSES/
LITER
K-FACTOR
GPM/mA
K-FACTOR
LPM/mA
1.5
2
2.5
3
3.5
4
5
6
8
10
12
14
16
18
20
24
5.544
5.489
5.4
5.327
5.269
5.21
5.087
4.964
4.73
4.483
4.25
4.1
3.85
3.6
3.375
2.9
11.544
11.489
11.4
11.327
11.269
11.21
11.087
10.964
10.73
10.483
10.25
10.1
9.85
9.6
9.375
8.9
55.45
37.47
27.82
17.77
13.04
9.92
6.05
4.02
2.18
1.30
0.88
0.71
0.53
0.41
0.32
0.22
14.650
9.900
7.350
4.695
3.445
2.621
1.598
1.062
0.576
0.343
0.232
0.188
0.140
0.108
0.085
0.058
9.91
16.34
23.31
35.99
48.14
61.98
97.40
140.7
243.6
383.9
621.6
658.6
860.4
1089
1353
1957
37.51
61.85
88.24
136.2
188.2
234.6
368.7
532.6
922.1
1453
2353
2493
3257
4122
5122
7408
Sch 40 Plastic Pipe Per ASTM-D-1785
Pipe
Size
Height
“H”
Height for
Hot Tap
Version “H”
Pulse Output Current Output
K-FACTOR
PULSES/
U.S.Gallon
K-FACTOR
PULSES/
LITER
K-FACTOR
GPM/mA
K-FACTOR
LPM/mA
1.5
2
2.5
3
3.5
4
5
6
8
10
12
5.537
5.482
5.391
5.317
5.258
5.199
5.075
4.95
4.715
4.465
4.231
11.537
11.482
11.391
11.317
11.258
11.199
11.075
10.95
10.715
10.465
10.231
56.55
38.16
28.37
18.09
13.25
10.07
6.13
4.07
2.20
1.32
0.89
14.941
10.082
7.495
4.779
3.501
2.661
1.620
1.075
0.581
0.349
0.235
9.691
16.05
24.57
35.38
47.38
61.12
96.25
139.1
241.3
380.6
540.6
36.68
60.76
93.01
133.9
179.4
231.5
364.4
526.6
913.4
1441
2046
Sch 5S Stainless Steel Pipe Per ANSI B36.19
Pipe
Size
Height
“H”
Height for
Hot Tap
Version “H”
Pulse Output Current Output
K-FACTOR
PULSES/
U.S.Gallon
K-FACTOR
PULSES/
LITER
K-FACTOR
GPM/mA
K-FACTOR
LPM/mA
1.5
2
2.5
3
3.5
4
5
6
8
10
12
14
16
18
20
22
24
5.608
5.56
5.496
5.434
5.384
5.334
5.206
5.1
4.9
4.668
4.45
4.325
4.118
3.918
3.7
3.5
3.276
11.608
11.56
11.496
11.434
11.384
11.334
11.206
11.1
10.9
10.668
10.45
10.325
10.118
9.918
9.7
9.5
9.276
47.36
31.98
23.03
14.90
11.03
8.45
5.33
3.56
1.94
1.18
0.80
0.65
0.48
0.37
0.30
0.24
0.20
12.513
8.449
6.085
3.937
2.914
2.232
1.408
0.941
0.513
0.312
0.211
0.172
0.127
0.098
0.079
0.063
0.053
11.98
19.27
29.00
42.38
56.21
71.83
109.2
157.0
270.3
420.1
591.6
716.5
939.0
1194
1473
1788
2123
45.35
72.95
109.8
160.4
212.8
271.9
413.4
594.3
1023
1590
2239
2712
3555
4520
5576
6768
8036
Table 2: “H” Dimension and K Factor
Sch 80S Stainless Steel Pipe Per ANSI B36.19
Pipe
Size
Height
“H”
Height for
Hot Tap
Version “H”
Pulse Output Current Output
K-FACTOR
PULSES/
U.S.Gallon
K-FACTOR
PULSES/
LITER
K-FACTOR
GPM/mA
K-FACTOR
LPM/mA
1.5
2
2.5
3
3.5
4
5
6
8
10
12
14
16
18
20
22
24
5.5
5.438
5.342
5.26
5.196
5.13
4.994
4.842
4.588
4.3
4.025
3.85
3.575
3.3
3.025
2.75
2.575
11.5
11.438
11.342
11.26
11.196
11.13
10.994
10.842
10.588
10.3
10.025
9.85
9.575
9.3
9.025
8.75
8.575
61.86
42.19
31.41
20.00
14.61
11.08
6.71
4.51
2.41
1.45
0.98
0.79
0.59
0.45
0.36
0.29
0.24
16.343
11.147
8.299
5.284
3.860
2.927
1.773
1.192
0.637
0.383
0.259
0.209
0.156
0.119
0.095
0.077
0.063
4.626
14.38
20.64
32.16
43.27
55.97
88.58
126.9
222.3
349.6
494.7
597.5
783.2
994.1
1230
1492
1778
17.50
54.43
78.13
121.7
163.8
211.9
335.3
480.4
841.5
1323
1973
2262
2965
3763
4656
5648
6731
Sch 40 Carbon Steel Pipe Per ANSI B36.10
Pipe
Size
Height
“H”
Height for
Hot Tap
Version “H”
Pulse Output Current Output
K-FACTOR
PULSES/
U.S.Gallon
K-FACTOR
PULSES/
LITER
K-FACTOR
GPM/mA
K-FACTOR
LPM/mA
1.5
2
2.5
3
3.5
4
5
6
8
10
12
14
16
18
20
24
5.544
5.489
5.4
5.327
5.269
5.21
5.087
4.964
4.73
4.483
4.25
4.1
3.85
3.6
3.375
2.9
11.544
11.489
11.4
11.327
11.269
11.21
11.087
10.964
10.73
10.483
10.25
10.1
9.85
9.6
9.375
8.9
55.45
37.47
27.82
17.77
13.04
9.92
6.05
4.02
2.18
1.30
0.88
0.71
0.53
0.41
0.32
0.22
14.650
9.900
7.350
4.695
3.445
2.621
1.598
1.062
0.576
0.343
0.232
0.188
0.140
0.108
0.085
0.058
9.91
16.34
23.31
35.99
48.14
61.98
97.40
140.7
243.6
383.9
621.6
658.6
860.4
1089
1353
1957
37.51
61.85
88.24
136.2
188.2
234.6
368.7
532.6
922.1
1453
2353
2493
3257
4122
5122
7408
Sch 80 Carbon Steel Pipe Per ANSI B36.10
Pipe
Size
Height
“H”
Height for
Hot Tap
Version “H”
Pulse Output Current Output
K-FACTOR
PULSES/
U.S.Gallon
K-FACTOR
PULSES/
LITER
K-FACTOR
GPM/mA
K-FACTOR
LPM/mA
1.5
2
2.5
3
3.5
4
5
6
8
10
12
14
16
18
20
22
24
5.5
5.438
5.342
5.26
5.196
5.13
4.994
4.842
4.588
4.3
4.025
3.85
3.575
3.3
3.025
2.75
2.575
11.5
11.438
11.342
11.26
11.196
11.13
10.994
10.842
10.588
10.3
10.025
9.85
9.575
9.3
9.025
8.75
8.575
61.86
42.19
31.41
20.00
14.61
11.08
6.71
4.51
2.41
1.45
0.98
0.79
0.59
0.45
0.36
0.29
0.24
16.343
11.147
8.299
5.284
3.860
2.927
1.773
1.192
0.637
0.383
0.259
0.209
0.156
0.119
0.095
0.077
0.063
4.626
14.38
20.64
32.16
43.27
55.97
88.58
126.9
222.3
349.6
494.7
597.5
783.2
994.1
1230
1492
1778
17.50
54.43
78.13
121.7
163.8
211.9
335.3
480.4
841.5
1323
1973
2262
2965
3763
4656
5648
6731
Printed in U.S.A. 3/20 FR# 443711-00 Rev. 5©Copyright 2020 Dwyer Instruments, Inc.
W.E. ANDERSON
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
Phone: [phone]
Fax: [phone]
www.dwyer-inst.com
e-mail: [email protected]