Full Text Searchable PDF User Manual
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.
Signet 2537 Paddlewheel Flowmeter
3-2537.090
Rev G 9/12 English
English
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
Titanium
FPM
-T0
PVDF, Natural
PVDF, Natural;
optional ETFE
w/ or w/o carbon
!
ber reinforced
PTFE sleeve
PVDF,
Natural
FPM
Case:
PBT, yellow
Inside Cover:
Valox, black
Wiring Ports:
½
in. NPT threads; liquid-tight
connector accepts cables 7 to
10 mm OD (0.275 in. to 0.394 in.)
Power Requirements
Multi:
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.
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
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
3
L), or 4 to 20 mA. This unit can be con
!
gured on-site directly through the built-in user
interface.
• The 4 to 20 mA model provides a blind current loop output.
• The Digital (S
3
L) model provides a Digital (S
3
L) 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.
For earlier versions of this sensor, please visit our manual archives at www.gfsignet.com and download the 2537 rev C manual.
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)
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
Output Specifi cations
Signal Averaging:
Programmable 0 to 100 seconds
Sensitivity Response:
Programmable 0 to 9 scale
Pulse Divider/Total Pulse Output
Pulse Divider Setting:
1.0000 to 99999
Maximum pulse rate: 300 Hz
Maximum pulse width: 50 ms
*3-2537.090*
2
Signet 2537 Flowmeter
40
80
120
160
200
3
6
8
11
14
0
40
80
120
160
200
-18
4
27
49
71
93
°F
°C
psi
bar
240
115
PVDF
Polypropylene
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)
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.
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.
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.
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
Digital (S
3
L) output
Type:
Serial ASCII, TTL level 9600 bps
Maximum Cable Length: See Digital (S
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
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)
WARNING
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.
3
Signet 2537 Flowmeter
Location of Fitting
Recommended sensor upstream/downstream mounting
requirements:
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.
+45°
-45°
0°
Process
Pipe
Reducer
15 x I.D.
5 x I.D.
20 x I.D.
5 x I.D.
90° Elbow
40 x I.D.
5 x I.D.
2 x 90° Elbow
3 dimensions
25 x I.D.
5 x I.D.
2 x 90° Elbow
50 x I.D.
5 x I.D.
Pump/Valve
+
GF
+
+GF+
+
GF
+
+GF
+
+GF+
OK
OK
OK
Vertical flow is OK if the pipe remains full at all times.
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
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.
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
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.
0.5 to 2 inch versions (MPVC or CPVC)
2.5 to 4 inch versions (PVC)
2 to 4 inch, cut 1-7/16 inch hole in pipe
6 to 8 inch, cut 2-1/8 inch hole in pipe
Available in 10 and 12 inch sizes only
Cut 2-1/2 inch hole in pipe
Weld in place using solvent cement
Iron, Carbon Steel,
316 SS Threaded
tees
Carbon steel &
stainless steel
Weld-on
Weldolets
2 to 4 inch, cut 1-7/16 inch hole in pipe
Over 4 inch, cut 2-1/8 inch hole in pipe
For pipes from DN 15 to 50 mm
PP or PVDF
Type
Description
Plastic
tees
Metric
Union
Fitting
PVC
Saddles
Iron
Strap-on
saddles
PVC
Glue-on
Saddles
1.5 in. to 2 in. PVDF insert
Fiberglass
tees
FPT
0.5 to 2 in. versions
Mounts on threaded pipe ends
Metric
Wafer Fitting
For pipes DN65 to 200 mm
PP or PVDF
d
4
Signet 2537 Flowmeter
Installation
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.
sensor
cap
tab
notch
Lubricate
O-rings
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
130 mm
(5.12 in.)
97 mm
(3.82 in.)
2537 Paddlewheel Flowmeter
for 5 to 8 in. pipe
171 mm
(6.73 in.)
97 mm
(3.82 in.)
Dimensions
S1
S2
Blk Red Shld
-
+
3-8900.621C
I/O Module 3-8900.401-X
1
2
3
4
5
6
7
8
9
10
11
12
13
14
+5VDC (Black)
Freq. Input (Red)
GND (Shield)
+5VDC (Black)
Freq. Input 2 (Red)
S L (Red)
GND (White/Shield)
+5VDC (Black)
S L (Red)
GND (White/Shield)
3
3
Analog Output 1
Analog Output 2
(if applicable)
(if applicable)
Frequency
Input
1
Frequency
Input 2
OR
S3L
Input
2
S3L
Input
1
+
-
+
-
S1
S2
Blk Red Shld
-
+
DA
TA
GND
V+
SHLD
Wiring: Digital (S
3
L) Output
The Digital (S
3
L) output is compatible with the 3-8900 Multi-Parameter Controller
and the 3-9900 Transmitter.
-
+
S1
S2
Blk Red Shld
-
-
+
+
-
+
-
+
-
+
-
+
T
T
P
t
WIRING DIAGRAM
BLK
RED
SHLD
Sensor
PW/OUT
+
Power Rating:
5 - 6.5VDC 0.03 AMP
3-2505.613A
T
P
t
T
P
t
T
P
t
S1
S2
Blk Red Shld
-
+
WIRING DIAGRAM
BLK
RED
SHLD
Sensor
PW/OUT
+
Power Rating:
24VDC 0.03 AMP
3-2505.61
1A
N/O
COM
N/C
Dry-Contact
Relay
Relay Rating:
5A @ 250VAC
5A @ 30VDC
Using the liquid-tight
connector
Using conduit
HAND-TIGHTEN THE THREADED NUT ONTO THE IN-
STALLATION FITTING. DO NOT USE TOOLS! DO NOT
USE THREAD SEALANT OR LUBRICANTS ON THE
FITTING THREADS OR THE SENSOR CAP.
Connection to
9900 Transmitter
Connection to
8900 Controller
5
Signet 2537 Flowmeter
Wiring: 4 to 20 mA Output
S1
S2
Power Supply
12 to 32 VDC, 0.03 A
+
-
Blk Red Shld
-
+
Programmable Logic Controller
Datalogger
Chart Recorder
4 to 20 mA Loop monitor
Internal sensor
connections
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.
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.
Dry Contact Relay Wiring
• The wiring is identical for On-OFF and Pulse modes.
Solid State Relay Wiring
• The wiring is identical for On-OFF and Pulse modes
.
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.
S1
S2
Power Supply
24 VDC, 0.03 A
+
-
Normally Closed
Common
Normally Open
Blk Red Shld
-
+
Internal sensor
connections
S1
S2
Power Supply
5 to 24 VDC,
0.03 A
Blk Red Shld
-
+
1
2
Load
+
–
I/O
10K
Ω
S1
S2
Blk Red Shld
-
-
+
-
+
-
+
-
+
-
+
-
+
T
P
t
T
P
t
T
P
t
T
T
P
P
t
t
WIRING DIAGRAM
BLK
RED
SHLD
Sensor
PW/OUT
+
Power Rating:
12 - 32VDC 0.03 AMP
3-2505.614A
-
+
-
+
-
+
-
+
S1
S2
Blk Red Shld
-
-
+
+
S1
S2
Blk Red Shld
-
-
+
+
T
P
t
T
T
P
P
t
t
T
T
P
P
t
t
WIRING DIAGRAM
BLK
RED
SHLD
Sensor
PW/OUT
+
Power Rating:
5 - 24VDC 0.03 AMP
3-2505.612A
WIRING DIAGRAM
BLK
RED
SHLD
Sensor
PW/OUT
+
Power Rating:
24VDC 0.03 AMP
3-2505.61
1A
Solid-State
Relay
Relay Rating:
100mA @ 40VDC
70mA @ 33VAC
3-2505.616A
Load
1
2
N/O
COM
N/C
Dry-Contact
Relay
Relay Rating:
5A @ 250VAC
5A @ 30VDC
T
P
t
-
+
-
+
S1
S2
Blk Red Shld
-
-
+
+
S1
S2
Blk Red Shld
-
-
+
+
-
+
-
+
T
P
t
WIRING DIAGRAM
BLK
RED
SHLD
Sensor
PW/OUT
+
Power Rating:
24VDC 0.03 AMP
3-2505.61
1A
T
P
t
WIRING DIAGRAM
BLK
RED
SHLD
Sensor
PW/OUT
+
Power Rating:
5 - 24VDC 0.03 AMP
3-2505.612A
T
P
t
Solid-State
Relay
Relay Rating:
100mA @ 40VDC
70mA @ 33VAC
3-2505.616A
Load
1
2
N/O
COM
N/C
Dry-Contact
Relay
Relay Rating:
5A @ 250VAC
5A @ 30VDC
T
P
t
6
Signet 2537 Flowmeter
Operation
The 2537 Flowmeter is available in three different
models. The programming menus vary signi
!
cantly
from one model to another.
This chart is provided inside the yellow cover to assist
in navigating the menus in the 2537.
T
P
t
T
P
t
T
P
t
T
P
t
T
P
t
View Mode Function
• All models display the model name:
Multi
,
Digital
or
4-20
.
• If the white key (S1) is held down for three seconds, the
#
ow rate is displayed for 10 minutes before
reverting back to the model name.
• In the
Multi
Model, if the “Multi” menu item is set to “divider”, then the divided pulse output will be
displayed in pulses/seconds (p/s).
Menus
Mode
Action
View
(
Display Flow Rate
(
Go to MENU
Go to VIEW
Menu
1X
(
Next Menu
1X
(
Display Current Value Previous Mode
(
Go to Edit
Previous Mode
1X
(
Shift digit to right
Previous Mode
Edit
1X
(
Increment Value
(
Go to SAVE
Previous Mode
SAVE
1X
(
Toggle
1X
(
Store Change
N/A
3-2537-1C-XX, 3-2537-2C-XX
3-2537-5C-XX
3-2537-6C-XX
7
Signet 2537 Flowmeter
Menu Details
This table shows the de
!
nition of each menu function, the setting parameters and the page where detailed instructions can be located.
Menu Function
Defi nition
Setting Parameters
More
Information
Flow Unit
Liters or Gallons per sec, min., hour or day
See list on page 8
page 8
K-Factor
Set PULSES per VOLUME UNIT
0.0001 to 999999
page 8
Average
Smooths out erratic
#
ow conditions
0 to 100 seconds
page 9
Sensitivity
Overrides Average for large rate changes
0 to 9
page 9
Mode
Select the output mode
Total or Divider or On-OFF
page 10
P-Factor
As PULSE DIVIDER, divides input freq.
1.0000 to 99999
page 10
P-Factor
As PULSE TOTAL, multiplies K-Factor
1.0000 to 99999
page 10
Relay Logic
Select Hi alarm or Lo alarm mode
Hi or Lo
page 11
Relay Set
Set Relay Setpoint
0.0000 to 99999
page 11
Relay Hysteresis Rate inside Setpoint to DEENERGIZE relay
0.0000 to 99999
page 11
Relay Delay
Time delay before relay is ENERGIZED
0000.0 to 6400.0
page 11
4 Set
Set
#
ow RATE to be represented by 4 mA
0.0000 to 99999
page 8
20 Set
Set
#
ow RATE to be represented by 20 mA
0.0000 to 99999
page 8
Contrast
Adjust visibility of liquid crystal display
1 to 3
page 8
8
Signet 2537 Flowmeter
These two functions are used to span the 4 to 20 mA output
signal to the required range.
The factory setting is 4 to 20 mA = 0 to 10.000
Only the 20 mA span is illustrated here.
Example: Set 20 mA = 500 GPM.
Set 4 and Set 20
2s
2s
x5
x4
x2
t
T
P
t
T
P
t
T
P
t
t
T
P
t
T
P
t
T
P
t
2s
Go to next
menu item
Return to
Normal Operation
Save the new setting:
This function is available on
these versions of the 2537.
2s
x2
x3
x5
2s
T
P
t
T
P
t
t
T
P
1.
4.
5.
6.
7.
2.
3.
K-Factor
Minimum value
Maximum value
A K-Factor is the number of pulses
a sensor will generate for each
engineering unit of
#
uid that passes
the sensor. The factory setting is
60.0000. Locate the K-Factor in the
tables on page 12 and 13.
Example: Set the K-Factor to 63.5 Pulses per Gallon:
2s
Go to next
menu item
Return to
Normal Operation
Save the new setting:
Select the volumetric units for the
#
ow measurement.
Flow Units
Example: Set the Flow Units to Gallons per minute:
This function is available on these
versions of the 2537.
2s
2s
T
P
t
T
P
t
1.
2.
3.
Liters/minute
(Factory setting)
Liters/hour
Liters/day
Liters/second
Gallons/minute
Gallons/hour
Gallons/day
Gallons/second
2s
Go to next
menu item
Return to
Normal Operation
Save the new setting:
T
T
P
P
t
t
T
T
P
P
t
t
T
T
P
P
t
t
T
T
P
P
t
t
T
T
P
P
t
t
T
T
P
P
t
t
Set Contrast
This function is available on
these versions of the 2537.
All models of the 2537 have the CONTRAST adjustment. It is
always located at the end of the menu.
2s
x1
1.
2.
Repeat until
2s
Go to next
menu item
Return to
Normal Operation
Save the new setting:
Three levels of adjustment are
available. The factory setting of
3 is the highest contrast setting.
To access the adjustment, enter the
menu and scroll until the Contrast
display appears.
Choose:
OR
OR
This function is
available on the above
versions of the 2537.
9
Signet 2537 Flowmeter
t
T
P
t
T
P
T
P
t
2s
2s
x2
x5
1.
2.
3.
4.
5.
Set Averaging
Minimum value
Maximum value
T
T
P
P
t
t
T
T
P
P
t
t
This function is available on
these versions of the 2537:
2s
Go to next
menu item
Return to
Normal Operation
Save the new setting:
Example:
Set the Averaging for 50 seconds.
Set Sensitivity
Minimum value
Maximum value
2s
2s
x3
x5
T
P
t
T
P
t
T
P
t
1.
2.
3.
4.
This function is available on
these versions of the 2537:
2s
Go to next
menu item
Return to
Normal Operation
Save the new setting:
Example: Set the Sensitivity to 5.
10 s
2 s
20 s
30 s
40 s
50 s
60 s
70 s
No AVERAGING, no SENSITIVITY
With AVERAGING set to 0 (zero) and with SENSITIVITY set to zero,
the 2537 responds to every unstable shift in the
#
ow. The dashed
red line represents the actual output of the
#
ow sensor in unstable
#
ow conditions.
With AVERAGING set to 50 seconds and SENSITIVITY still set to
zero the
#
ow rate is stabilized, but a sharp change in
#
ow rate is not
represented for 50 seconds or longer (dotted green line).
With AVERAGING at 50 seconds and SENSITIVITY set to 4 OR 5,
the
#
ow rate is stabilized, while the sudden shift in
#
ow is re
#
ected
very quickly (solid blue line).
NOTE: The SENSITIVITY function is ineffective if the AVERAGING function is set to zero (seconds).
AVERAGING only
AVERAGING and SENSITIVITY
Averaging and Sensitivity Settings
• Because ideal
#
ow conditions are often impossible to achieve, the
#
ow rate is often erratic, which causes erratic readings in control
features (e.g., relays, 4 to 20 mA loops, etc.) that are associated with the
#
ow rate.
• The best solution to these problems is to correct any piping de
!
ciency that causes the instability. This may involve longer straight
runs upstream, reducing the pipe size to maintain a full pipe at all times, and other installation changes. In many situations, however,
these measures are simply not possible.
• The 2537 meter provides two tools that are designed to "work around" these de
!
ciencies. The Averaging and the Sensitivity features
should be studied before making adjustments.
Averaging Time in Seconds (Factory set: 0 seconds)
• Set the time the meter will use as the averaging period. The range is from 0 (no average applied to input) to 100 (seconds of
averaging applied to input).
Use higher averaging times to smooth the display and current output where the
#
ow in the pipe is erratic.
Quick Response Sensitivity (Factory set: 0)
• Set the relative degree of change in the
#
ow rate required to allow the 2537 to disable the AVERAGING and jump to a new
#
ow rate
immediately. The scale is from 0 (least sensitive, averaging is never disabled.) to 9 (a very small change in
#
ow rate will disable the
averaging).
The factory setting is 0 (zero).
The factory setting is 0 (zero).
P
P
T
T
t
t
T
T
P
P
t
t
T
T
P
P
t
t
10
Signet 2537 Flowmeter
Mode
This function is available on
these versions of the 2537:
PULSE TOTAL Output = Input pulses ÷ (K-Factor
×
P-Factor)
TOTAL is a traditional pump pulser function. This selection will
allow the entry of a K-Factor to de
!
ne a volumetric unit, then set
a P-Factor to de
!
ne the number of volumetric units required to
generate one pulse out.
2s
2s
2s
t
T
P
t
T
P
T
P
t
1.
3.
2.
t
T
P
2s
Go to next
menu item
Return to
Normal Operation
Save the new setting:
P-Factor
Minimum value
Maximum value
This function is available on
these versions of the 2537:
2s
x2
x4
2s
t
T
P
t
P
T
T
P
t
1.
4.
5.
3.
2.
In PULSE DIVIDER mode the P-Factor divides:
The pulse stream from the paddlewheel sensor will be divided
by the P-Factor. The resulting frequency is output through a
relay.
In PULSE TOTAL mode the P-Factor multiplies:
The pulse stream from the paddlewheel sensor is divided
by the K-Factor MULTIPLIED by the P-factor. The resulting
frequency is output through a relay.
2s
Go to next
menu item
Return to
Normal Operation
Save the new setting:
Select DIVIDER or TOTAL operation.
The factory setting is TOTAL.
PULSE DIVIDER Output = Input pulses ÷ P-Factor
DIVIDER allows you to set a scaling value (P-Factor) from
1.0000 to 99999.
Example: If the P-Factor is set for 2, then the 2537 will output
one pulse for every 2 pulses received from the sensor.
This selection enables the output frequency to be scaled down
to match associated equipment capabilities.
When using the PULSE DIVIDER output, associated equipment
must divide the K-Factors in this manual by the P-Factor for
correct calibration.
Example:
Set the Total Pulse output so there is one pulse out for each
2 gallons that passes the sensor if the K-Factor is 3.0.
1.
K-Factor = 3.0 (pulses in per gallon)
2.
P-Factor = 2 (gallons out per pulse)
Pulses IN
Pulses OUT
2
1
3
5
4
6
8
7
9
11
10
12
2
2 Gal
3 Gal
The factory setting is 1.0000
1
1 Gal
4 Gal
11
10
12
5
6
Pulses IN
Pulses OUT
1 2 3
5
7
9
4
6
8
1
2
3
4
T
P
t
T
P
t
T
P
t
11
Signet 2537 Flowmeter
x5
x6
2s
2s
T
P
t
T
P
t
T
P
t
1.
2.
3.
4.
Hysteresis holds a relay energized until the
#
ow rate moves this amount past the setpoint.
The factory setting is 0.5000
3. Program the HYSTERESIS.
Set Relay Operation
The On-OFF mode has one relay (SPDT or solid-state) that can be programmed as a HIGH (Hi)
alarm or a LOW (Lo) alarm.
T
P
t
T
P
t
2s
Go to next
menu item
Return to
Normal Operation
Save the new setting:
x5
x3
2s
2s
T
P
t
t
T
P
t
T
P
1.
2.
3.
4.
5.
2. Program the SETPOINT.
The SETPOINT is the
#
ow rate
where the relay will be energized.
The factory setting is 5.0000.
x7
2s
2s
T
P
t
P
T
t
t
T
P
1.
2.
3.
4.
5.
When the
#
ow rate reaches the setpoint, the
2537 will wait this long (in seconds) before
triggering the alarm.
The factory setting is 0000.0 seconds.
4. Program the DELAY.
A HI alarm will be activated when the
#
ow rate rises ABOVE the setpoint.
A LO alarm will be activated when the
#
ow rate falls BELOW the setpoint.
The factory setting is Hi(gh).
x4
2s
2s
T
P
t
T
P
t
t
T
P
1.
2.
3.
4.
1. Select HI or LO Relay Alarm logic
2s
Go to next
menu item
Return to
Normal Operation
Save the new setting:
2s
Go to next
menu item
Return to
Normal Operation
Save the new setting:
2s
Go to next
menu item
Return to
Normal Operation
Save the new setting:
Minimum value
Maximum value
Minimum value
Maximum value
Minimum value
Maximum value
Example: Change the Relay Logic to Low:
Example: Change the Setpoint to 8.0000:
Example: Change the Hysteresis to 5.0000:
Example: Change the Delay to 10.0:
12
Signet 2537 Flowmeter
K-Factors
When using the PULSE DIVIDER mode, associated equipment must divide the K-Factors by the P-Factor.
A
K-Factor
is the number of pulses a sensor will generate for each engineering unit of
#
uid that passes the sensor. K-Factors for water
are listed below in U.S. gallons and liters. For example, in a 1 inch SCH 80 PVC pipe, using the MPV8T010 PVC
!
tting, the 2537
paddlewheel generates 335.53 pulses per gallon of water passing the rotor.
PIPE
SIZE
(IN.)
FITTING
2537 SENSOR
U.S.
GAL
LITERS
SCH 80 MOLDED TEES FOR SCH 80 PVC PIPE
1/2
MPV8T005F
MPV8T005
MCPV8T005F
1027.1
271.37
3/4
MPV8T007F
MPV8T007
MCPV8T007F
583.19
154.08
1
MPV8T010F
MPV8T010
MCPV8T010F
335.53
88.65
1-1/4
MPV8T012F
MPV8T012
MCPV8T012F
178.79
47.24
1-1/2
MPV8T015F
MPV8T015
MCPV8T015F
121.42
32.08
2
MPV8T020F
MPV8T020
MCPV8T020F
71.44
18.87
2-1/2
PV8T025
42.994
11.359
3
PV8T030
26.652
7.0414
4
PV8T040
15.006
3.9645
PIPE
SIZE
(IN.)
FITTING
2537 SENSOR
U.S.
GAL
LITERS
CARBON STEEL TEES ON SCH 40 PIPE
1/2
CS4T005
756.00
199.74
3/4
CS4T007
438.69
115.90
1
CS4T010
286.78
75.768
1-1/4
CS4T012
121.22
32.026
1-1/2
CS4T015
91.139
24.079
2
CS4T020
54.468
14.391
STAINLESS STEEL TEES ON SCH 40 PIPE
1/2
CR4T005
734.20
193.98
3/4
CR4T007
412.10
108.88
1
CR4T010
252.70
66.764
1-1/4
CR4T012
128.12
33.849
1-1/2
CR4T015
77.320
20.428
2
CR4T020
45.780
12.095
GALVANIZED IRON TEES ON SCH 40 PIPE
1
IR4T010
213.01
56.277
1-1/4
IR4T012
127.75
33.751
1 1/2
IR4T015
94.401
24.941
2
IR4T020
59.420
15.699
BRONZE TEES ON SCH 40 PIPE
1
BR4T010
213.01
56.277
1-1/4
BR4T012
127.75
33.751
1-1/2
BR4T015
94.401
24.941
2
BR4T020
59.420
15.699
COPPER TEE FITTINGS ON COPPER PIPE
SCH K
1/2
CUKT005
917.84
242.50
3/4
CUKT007
428.27
113.15
1
CUKT010
256.43
67.749
1-1/4
CUKT012
176.44
46.615
1-1/2
CUKT015
115.69
30.565
2
CUKT020
63.385
16.746
COPPER TEE FITTINGS ON COPPER PIPE
SCH L
1/2
CUKT005
858.22
226.74
3/4
CUKT007
385.74
101.91
1
CUKT010
241.64
63.841
1-1/4
CUKT012
170.90
45.152
1-1/2
CUKT015
112.03
29.598
2
CUKT020
61.74
16.310
Molded Tees
Saddles
Metal Tees
PIPE
SIZE
(IN.)
FITTING
2537 SENSOR
U.S.
GAL
LITERS
SCH 80 PVC SADDLES FOR SCH 80 PVC PIPE
2
PV8S020
66.739
17.633
2-1/2
PV8S025
42.994
11.359
3
PV8S030
26.652
7.0414
4
PV8S040
15.006
3.9645
6
PV8S060
8.3246
2.1994
8
PV8S080
5.0164
1.3253
SCH 80 PVC SADDLE ON SCH 40 PVC PIPE
2
PV8S020
54.700
14.452
2-1/2
PV8S025
37.159
9.8175
3
PV8S030
23.697
6.2608
4
PV8S040
13.456
3.5552
6
PV8S060
7.4594
1.9708
8
PV8S080
4.5292
1.1966
13
Signet 2537 Flowmeter
K-Factors
PIPE
SIZE
FITTING
2537 SENSOR
U.S. GAL
LITERS
POLYPROPYLENE TEES (DIN/ISO AND BS AND ANSI)
DN15
PPMT005
952.87
251.75
DN20
PPMT007
563.10
148.77
DN25
PPMT010
291.60
77.042
DN32
PPMT012
169.22
44.709
DN40
PPMT015
103.90
27.450
DN50
PPMT020
60.789
16.060
DN65
PPMT025
41.498
10.964
DN80
PPMT030
26.786
7.0769
DN100
PPMT040
17.415
4.6011
DN125
PPMT050
10.168
2.6864
DN150
PPMT060
7.3119
1.9318
DN200
PPMT080
3.9946
1.0554
PIPE
SIZE
FITTING
2537 SENSOR
U.S. GAL
LITERS
PVDF FITTINGS (DIN/ISO AND BS AND ANSI)
DN15
SFMT005
827.26
218.56
DN20
SFMT007
489.87
129.42
DN25
SFMT010
283.55
74.915
DN32
SFMT012
158.59
41.899
DN40
SFMT015
86.980
22.980
DN50
SFMT020
50.385
13.312
PVC FITTINGS (DIN/ISO) - EUROPE ONLY
DN15
PVMT005
972.37
256.90
DN20
PVMT007
485.69
128.32
DN25
PVMT010
297.27
78.540
DN32
PVMT012
170.25
44.980
DN40
PVMT015
103.71
27.400
DN50
PVMT020
59.500
15.720
DN65
PVMT025
34.973
9.2400
DN80
PVMT030
24.981
6.6000
DN100
PVMT040
16.275
4.3000
DN150
PVMT060
8.1756
2.1600
DN200
PVMT080
4.0878
1.0800
PIPE
SIZE
(IN.)
FITTING
2537 SENSOR
U.S. GAL
LITERS
STAINLESS STEEL WELDOLETS ON SCH 40 PIPE
2-1/2
CR4W025
37.600
9.9339
3
CR4W030
24.340
6.4306
4
CR4W040
13.920
3.6777
5
CR4W050
10.860
2.8692
6
CR4W060
7.5200
1.9868
8
CR4W080
4.3400
1.1466
CARBON STEEL WELDOLETS ON SCH 40 PIPE
2-1/2
CS4W025
37.600
9.9339
3
CS4W030
24.340
6.4306
4
CS4W040
13.920
3.6777
5
CS4W050
10.860
2.8692
6
CS4W060
7.5200
1.9868
8
CS4W080
4.3400
1.1466
COPPER/BRONZE BRAZOLETS ON SCH 40 PIPE
2-1/2
BR4B025
37.600
9.934
3
BR4B030
24.340
6.431
4
BR4B040
13.920
3.678
5
BR4B050
10.860
2.869
6
BR4B060
7.5200
1.987
8
BR4B080
4.3400
1.147
PIPE
SIZE
FITTING
2537 SENSOR
U.S. GAL
LITERS
POLYPROPYLENE WAFER FITTINGS (DIN/ISO)
DN65
PPMTE025
PPMTF025
41.498
10.964
DN80
PPMTE030
PPMTF030
26.786
7.0769
DN100
PPMTE040
PPMTF040
17.415
4.6011
DN125
PPMTE050
PPMTF050
10.168
2.6864
DN150
PPMTE060
PPMTF060
7.3119
1.9318
DN200
PPMTE080
PPMTF080
3.9946
1.0554
PVDF WAFER FITTINGS (DIN/ISO)
DN65
SFMTF025
36.133
9.5465
DN80
SFMTF030
24.715
6.5297
DN100
SFMTF040
16.120
4.2589
DN125
SFMTF050
8.8624
2.3415
DN150
SFMTF060
6.4543
1.7052
DN200
SFMTF080
4.0720
1.0758
PIPE
SIZE
(IN.)
FITTING
2537 SENSOR
U.S. GAL
LITERS
SCH 80 IRON SADDLES ON SCH 80 PIPE
2
IR8S020
64.720
17.099
2-1/2
IR8S025
42.480
11.223
3
IR8S030
26.420
6.980
4
IR8S040
14.700
3.884
5
IR8S050
12.180
3.218
6
IR8S060
8.4400
2.230
8
IR8S080
4.9000
1.295
SCH 80 IRON SADDLE ON SCH 40 PIPE
2
IR8S020
53.640
14.172
2-1/2
IR8S025
37.600
9.934
3
IR8S030
23.220
6.135
4
IR8S040
13.260
3.503
5
IR8S050
11.040
2.917
6
IR8S060
7.2400
1.913
8
IR8S080
4.4000
1.162
Weldolets and Brazolets
Iron Saddles
Wafer Fittings
Union Tees
Union Tees
14
Signet 2537 Flowmeter
Maintenance and Cleaning
The 2537 requires very little maintenance.
• If the paddlewheel becomes fouled, it can be cleaned with mild detergents and a small brush.
• The electronics portion of the 2537 does not require maintenance or cleaning.
Rotor Replacement Procedure
1. To remove the rotor, insert a small screwdriver between the rotor and the ear of the sensor.
2. Twist the screwdriver blade to
#
ex the ear outward enough to remove one end of the rotor and pin.
DO NOT
#
ex the ear any more than necessary! If it breaks, the sensor cannot be repaired.
3. Install the new rotor by inserting one tip of the pin into the hole, then carefully
#
ex the opposite ear
back enough to slip rotor into place.
H-Dimensions
The plastic insert in Weldolet
!
ttings MUST be removed during the welding process. When reinstalled, it is important that the insert be
threaded to the proper height ("H" dimension).
Weldolet
“H” dimension
Part number inches
mm
CS4W020
2.38
60.45
CS4W025
2.33
59.18
CS4W030
2.32
58.92
CS4W040
2.30
58.42
CS4W050
3.09
78.48
CS4W060
2.96
75.18
CS4W080
2.73
69.34
"H"
Weldolet
“H” dimension
Part number inches
mm
CR4W020
2.38
60.45
CR4W025
2.33
59.18
CR4W030
2.32
58.92
CR4W040
2.30
58.42
CR4W050
3.09
78.48
CR4W060
2.96
75.18
CR4W080
2.73
69.34
15
Signet 2537 Flowmeter
Notes
Georg Fischer Signet LLC, 3401 Aerojet Avenue, El Monte, CA 91731-2882 U.S.A. • Tel. (626) 571-2770 • Fax (626) 573-2057
For Worldwide Sales and Service, visit our website: www.gfsignet.com • Or call (in the U.S.): (800) 854-4090
For the most up-to-date information, please refer to our website at www.gfsignet.com
3-2537.090 Rev G 9/12 English
© Georg Fischer Signet LLC 2012
Ordering Information
Mfr. Part No.
Code
Description
2537 system for 0.5 in. to 4 in. pipes, with polypropylene body, Black PVDF rotor, Titanium pin, FPM O-rings
3-2537-1C-P0
159 001 291
Pulse/Flow Switch, DCR, -P0, Integral Mount
3-2537-2C-P0
159 001 292
Pulse/Flow Switch, SSR, -P0, Integral Mount
3-2537-5C-P0
159 001 295
Digital (S
3
L), Integral Mount
3-2537-6C-P0
159 001 296
4 to 20 mA, Integral Mount
2537 system for 5 in. to 8 in. pipes, with polypropylene body, Black PVDF rotor, Titanium pin, FPM O-rings
3-2537-1C-P1
159 001 303
Pulse/Flow Switch, DCR, -P1, Integral Mount
3-2537-2C-P1
159 001 304
Pulse/Flow Switch, SSR, -P1, Integral Mount
3-2537-5C-P1
159 001 307
Digital (S
3
L), Integral Mount
3-2537-6C-P1
159 001 308
4 to 20 mA, Integral Mount
2537 system for 0.5 in. to 4 in. pipes, with natural PVDF body, rotor and pin, FPM O-rings
3-2537-1C-T0
159 001 315
Pulse/Flow Switch, DCR, -T0, Integral Mount
3-2537-2C-T0
159 001 316
Pulse/Flow Switch, SSR, -T0, Integral Mount
3-2537-5C-T0
159 001 319
Digital (S
3
L), Integral Mount
3-2537-6C-T0
159 001 320
4 to 20 mA, Integral Mount
Accessories
Mfr. Part No.
Code
Description
3-2536.320-1
198 820 052
Rotor, PVDF Black
3-2536.320-2
159 000 272
Rotor, PVDF Natural
3-2536.320-3
159 000 273
Rotor, ETFE
3-2536.321
198 820 054
Rotor and Pin, PVDF Natural
3-2536.322-1
198 820 056
Sleeved Rotor, PVDF Black
3-2536.322-2
198 820 057
Sleeved Rotor, PVDF Natural
3-2536.322-3
198 820 058
Sleeved Rotor, ETFE
M1546-1
198 801 182
Rotor Pin, Titanium
M1546-2
198 801 183
Rotor Pin, Hastelloy-C
M1546-3
198 820 014
Rotor Pin, Tantalum
M1546-4
198 820 015
Rotor Pin, Stainless Steel
P51545
198 820 016
Rotor Pin, Ceramic
1220-0021
198 801 186
O-Ring, FPM
1224-0021
198 820 006
O-Ring, EPDM
1228-0021
198 820 007
O-Ring, FFPM
P31536
198 840 201
Sensor Plug, Polypro
3-8050.390-1
159 001 702
Retaining Nut Replacement Kit, NPT, Valox
®
3-8050.390-3
159 310 116
Retaining Nut Replacement Kit, NPT, PP
3-8050.390-4
159 310 117
Retaining Nut Replacement Kit, NPT, PVDF
3-8050.391
159 001 703
Retaining Nut Replacement Kit, NPT, Stainless Steel
3-9000.392-1
159 000 839
Liquid tight connector kit, NPT (1 piece)
3-9000.392-2
159 000 841
Liquid tight connector kit, PG 13.5 (1 piece)
3-9000.392-3
159 001 430
Liquid-tight connector kit, dual-cable gland
7300-7524
159 000 687
24 VDC Power Supply 7.5 W, 300 mA
7300-1524
159 000 688
24 VDC Power Supply 15 W, 600 mA
7300-3024
159 000 689
24 VDC Power Supply 30 W, 1.3 A
7300-5024
159 000 690
24 VDC Power Supply 50 W, 2.1 A
7300-1024
159 000 691
24 VDC Power Supply 100 W, 4.2 A