GF Signet 2537 User Manual

Signet 2537 Paddlewheel Flowmeter

English

*3-2537.090*

3-2537.090 Rev G 9/12 English

SAFETY INSTRUCTIONS

1. Depressurize and vent system prior to installation or removal.

2. Con rm chemical compatibility before use.

3. Do not exceed maximum temperature/pressure speci cations.

4. Wear safety goggles or faceshield during installation/service.

5. Do not alter product construction.

6. If this equipment is used in a manner not speci ed by the manufacturer, the protection provided
by the equipment may be impaired.

7. This device is not approved for use or installation in hazardous locations.

Description

The 2537 Paddlewheel Flowmeter Series offer low  ow, low power and high resolution with various output options such as a Volumetric
Pulse, Pulse Divider, Flow Switch, Digital (S
interface.

• The 4 to 20 mA model provides a blind current loop output.

• The Digital (S

3

L) model provides a Digital (S3L) output for use with the Signet 8900 Multi-Parameter Controller or 9900 Transmitter.

• The Multi model uses a single relay (mechanical or solid state) and has three selectable operating modes:

• Divider Mode scales the paddlewheel frequency down to accommodate low frequency input devices.

• Total Mode outputs one pulse per a set volume of  uid.

• Flow Switch Mode uses a single relay for Hi or Lo alarm operation.

A small LCD enables the 2537 to be programmed without any external equipment. During normal operation the display is not visible.

3

L), or 4 to 20 mA. This unit can be con gured on-site directly through the built-in user

For earlier versions of this sensor, please visit our manual archives at www.gfsignet.com and download the 2537 rev C manual.

Specifi cations

General
Wetted Materials

Model Suffi x Sensor Body Rotor Pin O-ring

-P0, -P1 glass- lled PP PVDF, Black;
optional ETFE

w/ or w/o carbon

 ber reinforced

PTFE sleeve

-T0 PVDF, Natural PVDF, Natural;
optional ETFE

w/ or w/o carbon

 ber reinforced

PTFE sleeve

Titanium FPM

PVDF,

Natural

FPM

Paddlewheel Sensor Performance Specifi cations

Pipe Size Range: DN15 to DN200 (½ in. to 8 in.)
Min. Reynolds Number: 4500
Paddlewheel Frequency: 49 Hz per m/s nominal
(15 Hz per ft/s nominal)
Operating Range: 0.1 m/s to 6 m/s (0.3 ft/s to 20 ft/s)
Linearity: ±1% of max. range @ 25 °C (77 °F)
Repeatability: ±0.5% of max. range @ 25 °C (77 °F)

Electronics Performance Specifi cations

Input Frequency Range: 1 to 1000 Hz
System Response: 100 ms update rate nominal

Environmental Requirements

Enclosure Rating: NEMA 4X/IP65
Storage Temperature: -10 to 75 °C (14 to 167 °F)

Case: PBT, yellow
Inside Cover: Valox, black
Wiring Ports: ½ in. NPT threads; liquid-tight
connector accepts cables 7 to

Ambient Temperature: 0 to 65 °C (32 to 150 °F)
Relative Humidity: 0 to 90% RH, non-condensing
Altitude: 2000 m (6,562 ft)
Pollution Degree: 2

10 mm OD (0.275 in. to 0.394 in.)

Output Specifi cations

Power Requirements

Multi:

Signal Averaging: Programmable 0 to 100 seconds
Sensitivity Response: Programmable 0 to 9 scale

with Dry-Contact Relay: 24 VDC nominal, ±10%, regulated
30 mA max. current
with Solid-State Relay: 5 to 24 VDC nominal, ±10%, regulated
30 mA max. current
Digital (S

3

L): 5.0 VDC min. to 6.5 VDC max.

Pulse Divider/Total Pulse Output

Pulse Divider Setting: 1.0000 to 99999
Maximum pulse rate: 300 Hz
Maximum pulse width: 50 ms

30 mA max. current (1.5 mA nominal)
4 to 20 mA: 400 mV max. ripple voltage
30 mA max. current
Reverse Polarity and Short Circuit Protected: Up to 40 V, 1 hour
Over-Voltage Protection: > 40 VDC over 1 hour

Flow Switch Output

Relay Modes: Low, High
Time Delay: 0.0 to 6400.0 seconds
Hysteresis: Adjustable in Engineering Units

Relay Specifi cations

Dry Contact SPDT: 5 A @ 30 VDC, 5 A @ 250 VAC
Solid-State Relay: 100 mA @ 40 VDC, 70 mA @ 33 VAC

3

Digital (S

Type: Serial ASCII, TTL level 9600 bps
Maximum Cable Length: See Digital (S

L) output

3

L) speci cations

Current output (Passive 4 to 20 mA)

Loop Accuracy: ±32 A (@ 25 °C @ 24 VDC)
Loop Resolution: 5 A
Temp. Drift: ±1 A per °C max.
Power Supply Rejection: ±1 uA per V
Maximum Cable Length: 305 m (1,000 ft)
Max Loop Resistance: 600  @ 24 VDC, 1 K @ 32 VDC

Fluid Conditions

Pressure/Temperature Ratings:
Polypropylene Body:

• 12.5 bar (180 psi) max. @ 20 °C (68 °F)

• 1.7 bar (25 psi) max. @ 85 °C (185 °F)
PVDF Body:

• 14 bar (200 psi) max @ 20 °C (68 °F)

• 1.7 bar (25 psi) max @ 85 °C (185 °F)

Standards & Approvals

• UL

• CE

• Manufactured under ISO 9001 for Quality, ISO 14001
for Environmental Management and OHSAS 18001 for
occupational health and safety.

China RoHS (Go to www.gfsignet.com for details)

Declaration of Conformity according to FCC Part 15

This device complies with Part 15 of the FCC rules.

Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and,
(2) This device must accept any interference received, including
interference that may cause undesired operation.

ps

i

bar

14

200

11

160

8

120

6

80

PVDF

Polypropylene

3

40

Intended Use: This product is intended for use in industrial water treatment
and wastewater treatment applications where the chemical content and the  uid
temperatures are consistent with the speci cations listed herein.

This device is not approved for use or installation in fl ammable liquids.

°F

0 40 80 120 160 200

°C

-18 4

27

49

71 93

240

115

Chemical Compatibility

Georg Fischer Signet products are manufactured in a variety of wetted materials to suit various liquids and chemicals.

All plastic materials including typical piping types (PVC, PVDF, PP and PE) are more or less permeable to contained media, such as
water or volatile substances, including some acids. This effect is not related to porosity, but purely a matter of gas diffusion through the
plastic.

If the plastic material is compatible with the medium according to the application guidelines, the permeation will not damage the plastic
itself. However, if the plastic encloses other sensitive components, as is the case with GF Signet plastic paddlewheel sensors, these
may be affected or damaged by the media diffusing through the plastic body and rotor.

PVDF paddlewheel sensors may experience failure when used in hot nitric acid applications. PVDF is known to allow for substantial
permeation of nitric acid constituents without being damaged itself. No clear guideline can be given here, since the damaging effect to
the sensor is highly dependent on temperature, pressure and concentration.

Utilizing sensors in applications with aggressive substances is possible. On special request GF Signet can provide sensors with a
different internal resin encapsulation (potting) that will delay the damaging effect of acids to the sensors.

WARNING

The retaining nuts of paddlewheel sensors are not designed for prolonged contact with aggressive substances. Strong acids,

caustic substances and solvents or their vapor may lead to failure of the retaining nut, ejection of the sensor and loss of the

process fl uid with possibly serious consequences, such as damage to equipment and serious personal injury. Retaining nuts

that may have been in contact with such substances, e.g. due to leakage or spilling, must be replaced.

For all Special Product inquiries or to place an order, please email

signet-specialproduct@georgfi scher.com.

2 Signet 2537 Flowmeter

Location of Fitting

+45°

-45°

0°

Process
Pipe

Recommended sensor upstream/downstream mounting
requirements:

Reducer

15 x I.D. 5 x I.D.

90° Elbow

20 x I.D. 5 x I.D.

Select a location with suf cient length of straight pipe
immediately upstream of the sensor.

Locating the sensor in a trap or where the  ow is upward

2 x 90° Elbow

25 x I.D. 5 x I.D.

2 x 90° Elbow
3 dimensions

40 x I.D. 5 x I.D.

OKOK OK

helps to protect the sensor from exposure to air bubbles
when the system is in operation.

These con gurations are not recommended because it is
dif cult to keep the pipe full.

+GF+

+GF+

+

GF
+

Sensor Mounting Position

• Horizontal pipe runs: Mount sensor in the upright (0°) position for best performance. Mount at a
maximum of 45° when air bubbles are present (pipe must be full). Do not mount on the bottom of the
pipe when sediments are present.

• Vertical pipe runs: Mount sensor in any orientation; however, downward  ow is not recommended.
Upward  ow is preferred to ensure full pipe.

Pump/Valve

50 x I.D. 5 x I.D.

+
GF
+

Vertical flow is OK if the pipe remains full at all times.

+
GF

+

Installation: Pipe fi ttings

Georg Fischer Signet offers a wide selection of installation  ttings that control the position of the paddlewheel in relation to the
dimensions of the pipe.

Type Description

Plastic
tees

PVC
Glue-on
Saddles

PVC
Saddles

Iron
Strap-on
saddles

Metric
Wafer Fitting

d

0.5 to 2 inch versions (MPVC or CPVC)

2.5 to 4 inch versions (PVC)

Available in 10 and 12 inch sizes only
Cut 2-1/2 inch hole in pipe
Weld in place using solvent cement

2 to 4 inch, cut 1-7/16 inch hole in pipe
6 to 8 inch, cut 2-1/8 inch hole in pipe

2 to 4 inch, cut 1-7/16 inch hole in pipe
Over 4 inch, cut 2-1/8 inch hole in pipe
Special order 14 in. to 36 in.

For pipes DN65 to 200 mm
PP or PVDF

Type Description

Iron, Carbon Steel,
316 SS Threaded
tees

Carbon steel &
stainless steel
Weld-on

0.5 to 2 in. versions
Mounts on threaded pipe ends

2 to 4 inch, cut 1-7/16 inch hole in pipe
Over 4 inch, cut 2-1/8 inch hole in pipe

Weldolets

Fiberglass
tees

Metric
Union
Fitting

FPT

1.5 in. to 2 in. PVDF insert

For pipes from DN 15 to 50 mm
PP or PVDF

3Signet 2537 Flowmeter

Installation

sensor

cap

tab

notch

Lubricate
O-rings

-

+

-

+

-

+

-

+

-

+

-

+

T

P

t

T

P

t

T

P

t

T

P

t

-

+

Plastic sensor installation tips

• Inspect the sensor O-rings for nicks and other damage that
may compromise the seal.

• Lubricate O-rings with a non-petroleum based, viscous
lubricant (grease) compatible with the system.

• Using an alternating/twisting motion,
lower the sensor into the  tting, making
sure the conduit ports on the yellow
housing are pointing in the direction
of  ow.

• Engage one thread of the sensor cap
then turn the sensor until the alignment
tab is seated in the  tting notch.

Dimensions

130 mm

(5.12 in.)

97 mm

(3.82 in.)

171 mm

(6.73 in.)

97 mm

(3.82 in.)

HAND-TIGHTEN THE THREADED NUT ONTO THE IN­STALLATION FITTING. DO NOT USE TOOLS! DO NOT
USE THREAD SEALANT OR LUBRICANTS ON THE
FITTING THREADS OR THE SENSOR CAP.

Wiring

Electrical connections to this product should be made only by
quali ed personnel.

To access the wiring terminals:

• Turn yellow cap ¼ turn counterclockwise to remove.

• Remove the two retaining screws and remove the black
cover.

• Route all cables through the conduit ports before connecting
them to the terminals.

• Wiring terminals are rated for 16 to 22 AWG conductors.

• The cable must be 7 to 10 mm in diameter (0.275 to

0.394 in.) to seal properly in the liquid tight connector.

• The conduit ports have ½ inch NPT threads. After routing the
cables, seal the port with a liquid tight conduit connector
(3-9000.392-1) or with conduit.

• For conduit installations:

• Thread conduit with ½ in. NPT threads directly into the

conduit port.

• For conduit with ISO threads, use the black thread adapter

included with the connector kit.

• To comply with NEC requirements, do not use any metal

conduit in the installation.

2537 Paddlewheel Flowmeter
for ½ in. to 4 in. pipe

Power Rating:

24VDC 0.03 AMP

WIRING DIAGRAM

Sensor

PW/OUT

+

RED

SHLD

Dry-Contact

N/O

Relay

Relay Rating:

5A @ 250VAC

5A @ 30VDC

N/C

COM

BLK

Using the liquid-tight
connector

2537 Paddlewheel Flowmeter
for 5 to 8 in. pipe

Blk Red Shld

3-2505.611A

S1

S2

Using conduit

Wiring: Digital (S3L) Output

The Digital (S3L) output is compatible with the 3-8900 Multi-Parameter Controller
and the 3-9900 Transmitter.

Blk Red Shld

T

Power Rating:

5 - 6.5VDC 0.03 AMP

WIRING DIAGRAM

Sensor

Blk Red Shld

BLK

RED

S1

SHLD

PW/OUT

-

+

+

3-2505.613A

S2

S1

Blk Red Shld

DATA

V+

GND

SHLD

-

+

S2

Connection to
9900 Transmitter

S1

I/O Module 3-8900.401-X

+5VDC (Black)

Frequency

Input

Freq. Input (Red)

1

GND (Shield)

+5VDC (Black)

Frequency

Input 2

Freq. Input 2 (Red)

OR

S3L

Input

2

S3L

Input

1

3

S L (Red)

GND (White/Shield)

+5VDC (Black)

3

S L (Red)

GND (White/Shield)

Analog Output 1

(if applicable)

Analog Output 2

(if applicable)

1

2

3

4

5

6

7

8

9

10

11

+

12

-

13

+

14

-

4 Signet 2537 Flowmeter

-

3-8900.621C

Connection to
8900 Controller

+

S2

Wiring: 4 to 20 mA Output

-

+

-

+

-

+

-

+

-

+

-

+

T

P

t

T

P

t

-

+

-

+

T

P

t

T

P

t

-

+

-

+

-

+

-

+

T

P

t

T

P

t

The 4 to 20 mA output can be connected to Chart Recorders, PLCs or
any device that requires a 4 to 20 mA signal.
The 4 to 20 mA model requires an external power source of
12 to 32 VDC.

T

P

Power Rating:

12 - 32VDC 0.03 AMP

WIRING DIAGRAM

Sensor

Blk Red Shld

BLK

RED

SHLD

S1

PW/OUT

-

t

+

3-2505.614A

S2

S1

Blk Red Shld

Internal sensor
connections

Programmable Logic Controller
Datalogger
Chart Recorder
4 to 20 mA Loop monitor

S2

+

Power Supply

12 to 32 VDC, 0.03 A

-

Wiring: Flow Switch Output (On-OFF)

• The Flow Switch mode allows a single relay that is
programmable as a HIGH setpoint or LOW setpoint.

• The relay may be a dry-contact type or a solid state type.

• The dry contact relay requires an external power source of
24 VDC ± 10%.

• The solid state relay requires an external power source of
5 to 24 VDC.

T

T

P

Power Rating:

24VDC 0.03 AMP

WIRING DIAGRAM

Sensor

BLK

Blk Red Shld

Dry-Contact

N/O

Relay

RED

Relay Rating:

5A @ 250VAC

5A @ 30VDC

N/C

COM

S1

SHLD

PW/OUT

-

t

+

3-2505.611A

+

S2

S1

P

Power Rating:

5 - 24VDC 0.03 AMP

WIRING DIAGRAM

Sensor

Blk Red Shld

BLK

RED

SHLD

Solid-State

Relay

Relay Rating:

1 2

100mA @ 40VDC

Load

70mA @ 33VAC

3-2505.616A

PW/OUT

-

t

+

3-2505.612A

+

Wiring: Pulse Output

• The "Multi" mode allows a single relay that is programmable
as a Flow Switch, Volumetric pulse output or as a simple pulse
divider output.

• The relay may be a dry-contact type or a solid state type.

• The Dry Contact Relay requires an external power source of
24 VDC ± 10%.

• The Solid State Relay requires an external power source of
5 to 24 VDC.

• Solid State Relay requires a pull-up resistor (10K ohm
recommended). Consult your instrument/PLC manual for
wiring information.

Dry Contact Relay Wiring

• The wiring is identical for On-OFF and Pulse modes.

Blk Red Shld

S1

S2

Internal sensor
connections

Normally Open
Common

Normally Closed

S2

+

Power Supply

24 VDC, 0.03 A

-

Solid State Relay Wiring

• The wiring is identical for On-OFF and Pulse modes

Blk Red Shld

.

S1

Power Rating:

24VDC 0.03 AMP

WIRING DIAGRAM

Sensor

PW/OUT

+

Blk Red Shld

BLK

RED

Relay Rating:

Relay

N/C

COM

5A @ 250VAC

5A @ 30VDC

SHLD

S1

Dry-Contact

N/O

3-2505.611A

-

+

S2

S1

Power Rating:

5 - 24VDC 0.03 AMP

WIRING DIAGRAM

Sensor

BLK

RED

Blk Red Shld

SHLD

3-2505.616A

Solid-State

Relay

Relay Rating:

1 2

100mA @ 40VDC

Load

70mA @ 33VAC

PW/OUT

-

Load

+

3-2505.612A

+

S2

1 2

I/O

10KΩ

Power Supply

5 to 24 VDC,

0.03 A

+–

S2

5Signet 2537 Flowmeter