GF SIGNET 2550 User manual

page 1 of 12‡ SIGNET 2550 InsertionMagmeter
‡ SIGNET 2550 InsertionMagmeter ENGLISH
3-2550.090 G-12/02 English
1. Do not remove from pressurized lines! Do not remove safety ring from sensor. Unit may become a
dangerous projectile if safety devices are disabled.
2. Do not open wiring access plate in humid environment. Moisture in terminal area may cause
instrument failure.
3. In EDIT mode, all the output functions of the +GF+ SIGNET 2550 Insertion Magmeter are still
active, so the control process is uninterrupted.
4. The +GF+ SIGNET 2550 Insertion Magmeter weighs 11 lbs. Care must be taken to properly
support the unit with straps and/or bracing when necessary.
1. Description
The latest in bipolar pulsed DC technology and the best features of an insertion sensor are packed into the +GF+ SIGNET 2550
Insertion Magmeter. Simple installation, easy maintenance, and state-of-the-art microprocessor technology make the 2550 the best
alternative to traditional full-line magmeters. The 2550 is based on the Faraday principle, and provides current frequency output signals
proportional to the flow rate. The system incorporates automatic temperature compensation, resulting in outputs that are accurate
within ±2% of actual flow rate. The bipolar electronic design and the 10000 MΩinput impedance reduce galvanic formation on the
electrodes and minimize coating problems. The isolated current output provides an universal signal to recorders, valves, process
control and data acquisition devices. The open collector frequency output is compatible with all powered flow controllers.
2. Specifications
General
Flow Rate Range: 0.1 to 7 m/S (0.3 to 20 ft/s)
Linearity: ±2% of reading or 0.05 ft/s
(whichever is greater)
Min. Reynolds Number: 4500
Pipe Size Range: DN50 to DN300 (2 to 12 in.)
Wetted Materials:
•Sensor Body: 316 SS
•Electrodes: 316 SS
•Installation Hardware: 316 SS
•Insulator: PFA
•Internal O-Ring: FPM (Viton®)
Enclosure: NEMA4 die cast aluminum
Power Requirements: 24 VDC ±10%, 600 mA
Max. Loop Impedance: 600 W, isolated
Frequency Output: 0 to 7m/s (20 ft/s)=0 to 500 Hz isol.,
open collector, 5 to 12VDC
(2K pull-up recommended)
Fluid Condition:
•Temperature: 0 to 100°C (32 to 212°F)
•Minimum Conductance 5 mS/cm
Required
• Maximum Pressure: 17 bar (250 psi)
•Shipping Weight: 6.7 kg (13.2 lbs.)
•Ambient temperature: -20 to 80°C (-4 to 176°F)
140 mm
[5.52 in]
218 mm
[8.60 in]
122 mm
[4.79 in]
200 mm
[7.87 in]
Dimensions
Standards and Approvals:
•Manufactured under ISO 9001 and ISO 14001

page 2 of 12 ‡ SIGNET 2550 InsertionMagmeter
3. Installation
The linearity and accuracy of the 2550 depend on precise
alignment and insertion depth of the sensor in the pipe and
accurate measurement of the pipe dimensions. The installation
tool (3-2550.355) is recommended for best results.
3.1 Sensor location
Select a location for the sensor where the flow profile is fully
developed and not affected by any disturbances. A minimum of
10 pipe diameters of straight run upstream and 5 diameters
downstream is recommended. Some situations may require 20
pipe diameters or more upstream to insure a fully developed
turbulent flow profile.
The 2550 is sensitive to air bubbles at the electrodes. If there is
any question that the pipe is absolutely full, mount the sensor at
a 45°to 135°angle. The magmeter requires a clearance of
approximately 16 in./400 mm for removal.
3.2 Preparing the pipe
1. Cut a 2.125 in. ±1/16 in. (54 mm ±1.6 mm) opening in the
pipe. Carefully debur the hole for best results.
2. Install a standard 2 in. saddle or weld-on fitting on the
pipe. Welded fittings should be installed by qualified
personnel. The threads must be perpendicular to the pipe
within 1°for proper performance.
10 x id 5 x id
15 x id 5 x id
Reducer
Flange
20 x id 5 x id
Inlet Outlet
Inlet Outlet
90° elbow
Inlet Outlet
Measure and record the interior diameter of the pipe. This value
will be required to calibrate the 2550.
Interior diameter: ________________________________
3.3 Sensor Installation with tool
WARNING: Do not remove safety ring or adjustment nut
from sensor.
The installation tool (3-2550.355) simplifies installation and
insures proper insertion depth for maximum accuracy.
1. Set installation tool angle plate (1A) on pipe next to fitting.
Insert adjusting slide (1B) into top of angle plate.
2. Place height gauge (2A) short end inside pipe and pull up
against inside diameter of pipe. Insert height gauge long
end into slot in adjusting slide. Tighten wing nut (2B) to hold
adjusting slide in place against angle plate. Remove height
gauge from pipe.
Installation Tool
Front View
1A
1B
FLOW
PIPE I.D.
2A
Process Pipe
Cutaway Side View
2B
3A
Process Pipe
Cutaway Front View
3B
Adjustment
Nut
3. Loosen the three bolts at top of 2550 adjustment nut (3A).
Wrap the adjustment nut threads with three full wraps of
sealing tape and insert sensor into fitting until base of the
electronics enclosure is resting on top of adjusting slide
(3B). Be sure cable ports are pointing downstream. Thread
adjustment nut securely into pipe. Tighten all three bolts to
secure adjustment nut.
The 2550 Magmeter weighs 11 lbs. Care must be taken
to properly support the unit with straps and/or bracing
when necessary.
* Additional connector sizes available
from Hubbell Inc.:

page 3 of 12‡ SIGNET 2550 InsertionMagmeter
3.4 Sensor Installation Without Tool
It is recommended that the installation tool always be used when
installing the 2550. If the installation tool is not available, follow
the instructions below. Pay careful attention to the insertion depth
of the sensor in the pipe and the alignment of the electrodes
relative to the pipe.
1. Loosen three bolts at top of 2550 adjustment nut. Wrap
adjustment nut threads with 3 full wraps of sealing tape and
insert 2550 sensor into fitting. Be sure cable ports are
pointing downstream. Thread adjustment nut securely into
pipe.
2. Adjust meter height so tip of sensor is 0.20 inches below the
inside diameter of pipe. Calculate the "H" dimension:
H = sensor length - 0.2 in. - wall = 8.1025 in.
- 0.2 in - wall
H = 7.9025 - wall (H = 200 mm - wall thickness)
3. Align the magmeter parallel with the pipe ±1°. Retighten the
three 3/16 in. bolts to secure the sensor in the pipe.
"H"
Direction of Flow
Process Pipe
Process Pipe
Pipe Top View
Pipe Side View
FLOW
Align Magmeter
with pipe ±1 °
+GF+SIGNET
GEORGE FISCHER ‡
4. Wiring
To access the wiring terminals in the 2550 loosen six captive
outer cover screws (1), lift off outer cover (2), then loosen two
captive screws (3) and remove access plate (4). A wiring
diagram is located on the inside of the access plate. Five
terminal strips are available.
TS 3 Analog output
4 to 20 mA or 0 to 20 mA output
terminal 1 positive (R+)
terminal 2 negative (R-)
18 to 22 AWG wire recommended.
TS 4 Serial communication
Future expansion not available in this model.
TS 2 Frequency output
terminal 1 black 5 to 12 VDC in
terminal 2 red open collector pulse out
terminal 3/4 shield cable shield/gnd
(See sec 4.4 for detailed information.)
18 to 22 AWG wire recommended.
TS 1 Power input
terminal 1 negative
terminal 2 positive
14 to 20 AWG wire recommended.
Recommended power supply:
Model no. HB24-1.2A (24 V @ 1.2 A) or equivalent
Power-One, Inc., Camarillo, Ca. U.S.A.
Phone: [phone]
Toll free: 800/678-9445
Fax: [phone]
TS 5 Case
Chassis ground terminals; see section 3.1.
Fuse
1212123412
4-20 TS3
R+
TS4
B
A
TS2
RS485
BLK
RED
SHLD
SHLD
-
+
24V
TS1
P ower Input
R
-
Wiring
Diagram
3/4 A
SLO-BLO
1234
TS5
Case
3-2550.610-B
Analog Output
(Internally powered)
Serial
Communication
Frequency
Output
FLOW
GEORGE FISCHER +GF+
1
2
3
RUN
EDIT ENTER
FLOW
4
+GF+SIGNET
All wiring is installed through the watertight ports in the meter.
Wrap threads with sealing tape before threading into sockets.

page 4 of 12 ‡ SIGNET 2550 InsertionMagmeter
4.1 Grounding Requirements
The 2550, like all magnetic flow sensors, is sensitive to electrical
noise which is present in most piping systems. The grounding
procedure illustrated below is necessary in all installations to
insure proper performance.
Connect a local earth ground to the TS5 terminal strip as
illustrated (EG1). If the cable from power source to the 2550 is
less than 200 ft./61m, EG2 is an acceptable alternative. Using
both EG1 and EG2 is always the best system.
4.2 Installation tips
1. Make sure the Filter function is set to the proper value for
your AC power source (50 or 60 Hz). (See section 5.4.4.)
2. Allow the magmeter to operate for a period before
attempting to calibrate the unit. The electronics require a
"settling" period during which the electrode may generate
unstable signals. Thirty minutes to one hour is sufficient.
Local
Earth Ground #1
(EG1)
24 VDC 1A
Power Supply
-
+
2550
AC+
ACN
Earth Ground #2 (EG2)
110
VAC
1212123412
1234
4-20 TS3
R+
R-
TS4
B
A
TS2
RS485
BLK
RED
SHLD
SHLD
-
+
24V
TS1
TS5
Process Pipe
Cable gland
tightened
Cable gland
not tightened
With moisture
drip loop
Without moisture
drip loop
Careful cable routing and sealed ports can help
prevent water intrusion.
3. In plastic piping systems, the fluid carries significant levels
of static electricity that must be grounded for best magmeter
performance.
Since plastic pipe is not grounded as metal pipes are, extra
steps must be taken. Identify the places where the fluid is in
electrical contact with external metal structures or grounds.
Connect these points to TS5 wherever practical.
4. Connect the 24 VDC power and the analog output signal
cables through separate cable ports. If the frequency output
is being used, install a watertight cable connector in one of
the unused ports. Do not run two cables through one port.
Doing so will defeat the watertight integrity of the port.
5. Operation
5.1 Control panel description
During EDIT mode, all the output functions of the 2550
are still active, so the control process is uninterrupted.
4 digit liquid crystal display:
"-- -- -- -- --" indicates reverse flow. All signal outputs are disabled.
RUN
EDIT ENTER
FLOW
• The
RUN
EDIT
key switches the display from normal operation
(RUN) to EDIT, where the calibration parameters can be
modified.
• The and keys scroll through the menu selections
and edit options.
• The ENTER key serves two functions.
1. Selects a particular item from main menu.
2. Stores a new value in calibration functions.

page 5 of 12‡ SIGNET 2550 InsertionMagmeter
Two lamps on the front panel provide a visual indication of
system status:
Indication steady green lamp: normal operation
Indication flashing green lamp: noise level exceeds
acceptable range; all
outputs frozen at last
value for 10 seconds.
Indication flashing red lamp: when intermittent flow
is detected
5.2 Main menu
The menu is constructed in a loop, so you can move forward and
backward to select an item. After any item is edited, the display
will return to the main menu in the same location where it left off.
Press the run/edit key to enter the main menu.
RUN
EDIT
Display
functions
Calibrate
functions
Performance
functions
engineering units
Access code
pipe id
low current
high current
current span
sensitivity
response time
viscosity
custom calibration
filter
standard electrical
deviation displayed
standard flow
deviation displayed
electronic calibration
displayed
user calibration
displayed
This basic operating procedure repeats throughout the 2550
program:
1. Press
RUN
EDIT
to enter edit menu.
2. Press / to move to a specific menu item.
3. Press
ENTER
key to select the item for editing.
4. Press / / ENTER to edit the value/selection.
5. Press
ENTER
to store the new value/selection.
6. Press / to select another menu item, or
7. Press
RUN
EDIT
to return to normal operation.
5.2.1 Access Code
The main menu begins with a preprogrammed access
code of "1020" which allows editing of any menu setting.
Without entering the code, the menu settings can be
viewed, but not edited.
Any Function
10.
9.
7.
8.
ENTER
6.
5.
4.
3.
2.
1.
Step: Press: To display:
Up arrow advances
flashing digit.
Enter selects item for editing.
Final Enter key returns
display to main edit menu.
Up arrow advances flashing
digit.
Enter key stores the change
and advances flashing digit.
Run/edit key displays first
item in main edit menu.
RUN
EDIT
ENTER
ENTER
ENTER
ENTER
5.3 Calibrate functions
The next five main menu functions are used to input your specific
application data. To edit menu items, enter code first. (See sec.
5.2.1 above)

page 6 of 12 ‡ SIGNET 2550 InsertionMagmeter
m/s Meters per second
To change the engineering unit selection, first enter the access
code (section 5.2.1) then press the down arrow until the display
shows:
1.
2.
3.
Step: Press: To display:
Example illustrates changing
engineering units from
gallons per minute to
liters per minute.
ENTER key selects new
setting and returns display to
main menu.
Arrow keys advance main menu function; Run/Edit key returns
to normal operation.
5.3.1 Unit
Six engineering unit options are available in the unit menu.
Select one for your flow rate display.
ft/s Feet per second
l/s Liters per second
l/min Liters per minute
GPM U.S. Gallons per minute
m3/h Cubic meters per hour
The factory default setting
for Units is GPM.
ENTER
ENTER
UP arrow key changes
setting.
5.3.2 Interior diameter
You must enter the precise interior diameter of your pipe as measured during the installation process. Entry is made in inches when the
dimension entered is less than 40, and automatically switches to millimeters when the dimension entered is greater than 40.
To change the id selection, enter the access code (section 5.2.1) then press the down arrow until the display shows:
3.
2.
1.
4.
7.
6.
5.
8.
9.
10.
11.
12.
13.
The following example illustrates setting id to 10.40 in.
The decimal point location is selected after the last flashing
digit is set.
Down arrow key changes flashing digit.
The factory default setting for id is 2.067 in.
ENTER key stores new setting and advances flashing digit.
Down arrow key changes flashing digit.
Up arrow key changes flashing digit.
ENTER key stores final setting and returns to main menu.
Down arrow key moves decimal to right.
ENTER
ENTER
ENTER
ENTER
ENTER
ENTER
Step: Press: To display:
Arrow keys advance main menu function; Run/Edit key returns to normal operation.

page 7 of 12‡ SIGNET 2550 InsertionMagmeter
Step: Press: To display:
1.
7.
Example illustrates setting current output for 0 to 300 GPM = 4 - 20 mA.
The factory default value for current is :
0 to 200 GPM = 4 - 20 mA.
4.
2.
3.
5.
10.
11.
12.
Arrow keys advance main menu function; Run/Edit key returns to normal operation.
6.
9.
13.
14.
15.
16.
17.
Up arrow changes flashing digit.
Down arrow advances to next menu item.
Arrow keys will toggle setting.
Enter key stores final setting and returns to main menu.
Down arrow advances to next menu item.
Press enter 5 times to store the new setting and return
to main menu.
5.3.3 Current Output
The current output of the 2550 is set via three settings. Low current specifies the flow rate represented by the minimum current signal
(4 or 0 mA). High current is the flow rate represented by the maximum current (20 mA), and current selects a 4 to 20 or a 0 to 20 mA
span. To change the current selections, first enter the access code (section 5.2.1) then press the down arrow until the display shows:
ENTER
ENTER
ENTER
ENTER
ENTER
ENTER
ENTER
ENTER
ENTER
ENTER
ENTER
ENTER
ENTER
8.
5.4 PerformanceFunctions
The next five main menu functions help to tailor the magmeter
signals to your specific environment.
5.4.1 Sensitivity
The sensitivity function limits the amount of reference level noise
detected by the Magmeter input circuit. Use the StdE display
(section 5.5.2) to evaluate the amount of reference noise in your
system. If StdE is greater than 0.05, decreasing the sensitivity
value may stabilize flow readings.
The range selections are from 1 to 10, with 1 representing the
most sensitive and 10 the least sensitive.
To change the sensitivity setting, first enter the access code
(section 5.2.1) then press the down arrow until the display shows:
Example illustrates changing sensitivity setting to 6.
The factory default setting
for sensitivity is 4.
The enter key stores the new
setting and returns the
display to the main menu.
1.
2.
3.
4.
Up arrow changes the setting.
ENTER
ENTER
Step: Press: To display:
Arrow keys advance main menu function; Run/Edit key returns
to normal operation.

page 8 of 12 ‡ SIGNET 2550 InsertionMagmeter
5.4.2 Response Time
The response time function varies the rate at which the output
functions adjust to changes in the input signal. For example, if
the response time is set at 10 seconds, the current output will
take 10 seconds to reflect 95% of any change in flow signal input.
Use the response time to reduce the effects of turbulence and
steady/periodic noise in the flow. The standard flow deviation
display (section 5.5.2) will help evaluate the need for increased
response time. The options available are Instantaneous, 5, 10,
15, 20, 30, 40, 60, or 80 seconds.
To change the response time setting, first enter the access code
(section 5.2.1) then press the down arrow until the display shows:
The factory default setting
for response is 10 seconds.
Up arrow changes the setting.
The enter key stores the new
setting and returns the display
to the main menu.
Example illustrates setting response at 20 seconds.
1.
2.
3.
4.
ENTER
ENTER
Arrow keys advance main menu function; Run/Edit key returns
to normal operation.
The enter key stores the
new setting and returns to
the main menu.
5.4.3 Viscosity
Viscosity changes affect the flow
profile in the pipe, and can
compromise the accuracy of the
2550. This function allows you
to compensate for viscosity.
Select a viscosity setting from 1
to 4. One represents water, and
2 through 4 represent
increasingly viscous fluids.
To change the viscosity setting, first enter the access code
(section 5.2.1) then press the down arrow until the display shows:
11 Press the up arrow to
change the setting to 2.
The factory default setting
for viscosity is 1.
3.
2.
1.
ENTER
ENTER
Step: Press: To display:
Viscosity ranges
1 = 1 cp water
2 = 2 cp
3 = 4 cp
4 = 8 cp
5 = N/A- future expansion
Step: Press: To display:
Arrow keys advance main menu function; Run/Edit key returns
to normal operation.
5.4.4 AC Noise Filter
Select 50 Hz or 60 Hz rejection filter according to the AC power
standard in your area.
The factory default setting
for AC filter is 60 cycles.
The enter key stores the
new setting and returns to
the main menu.
Press the up or down arrow
to change the setting.
ENTER
ENTER
3.
2.
1.
Step: Press: To display:
Calculate the flow rate by measuring the volume
output for a fixed time period.
volume ÷time = flow rate
5.4.5 Calibration "B"
The CalB function allows you to compare the 2550 calibration to
your own volumetric or alternate flow measurement system. The
2550 stores this flow rate under the display function RatU (section
5.5.1).
The calibration based on the pipe data is still stored in the
memory, and can be recalled by selecting the display function
RatE (section 5.5.1).
To use CalB, first enter the access code (section 5.2.1) then use
the arrow keys until the display shows:
To change the filter setting, first enter the access code (section
5.2.1) then press the down arrow until the display shows:
Now the display has a flashing
digit.
8.
2.
3.
4.
Use the ENTER, UP and
DOWN arrow keys to set the
new flow rate.
10.
5.
6.
7.
9.
1. This is current display
selection RatE (see section
5.5.1).
Press the ENTER key to
display RatU value.
ENTER
ENTER
ENTER
ENTER
ENTER
ENTER
ENTER
RUN
EDIT
When completed, the new
calibration is stored as RatU
(see section 5.5.1).
Recall the original calibration by selecting RatE. (See section
5.5.1).
Step: Press: To display:

page 9 of 12‡ SIGNET 2550 InsertionMagmeter
5.5 Display )ptions
The last four main menu functions change the displayed
information. The first two also change the output values.
5.5.1 Operational Outputs
The "Rate Electronic" and "Rate User" functions change both the
display and the output values in the magmeter.
•RatE selects the standard calibration value based on entered
pipe id as the basis for all outputs.
• RatU selects the "Cal B" value as the basis for all outputs.
Code entry is not necessary to change the display setting.
RatE is the factory default setting.
Example illustrates changing display setting to RatU.
3.
4.
5.
6.
2.
1.
The display and all outputs
adjust to the new selection
when the enter key is
pressed.
Use the up arrow to move
quickly to the display
options.
ENTER
RUN
EDIT
Step: Press: To display:
5.5.2 Diagnostic displays
The diagnostic displays are used to evaluate abnormalities in the
process stream.
•The standard electrical deviation (StdE) is related to the level
of electrical fluctuation in the input signal reference. The
value is displayed in terms of volts, ie "0.02" represents 20
millivolts. Nominal values range from 50 mV at low velocities
to 80 mV at maximum velocity. Higher values indicate
excessive fluid noise levels, or inadequate earth ground.
Use the Sensitivity adjustment (section 5.4.1) to compensate
and check the grounding requirements (section 3.2).
•The standard flow deviation (StdF) is an overall indication of
the stability of the flow signal. It incorporates the StdE, as
1.
2.
3.
RUN
EDIT
ENTER
well as mechanical factors such as unstable flow profiles,
misaligned sensors, and coated electrodes. StdF is
displayed as a percentage of flow rate, typically from 5 to 8%.
StdF levels in excess of 10% indicate inadequate installation
or application standards.
If StdE value is high, the StdF will always be high.
If StdE is low but StdF is high, look for causes related to sensor
location, such as insufficient upstream straight runs and sensor
alignment. If the StdF cannot be corrected by modifying the
installation, the Response function (section 5.4.2) will help to
smooth the output signals.
Code entry is not necessary to change the display setting.
Example illustrates changing display setting to StdE.
Use the up arrow to move
quickly to the display
options. RatE is the
factory default setting.
Selecting the StdE or StdF
diagnostic displays will not
affect or interrupt the
outputs.
Step: Press: To display:
5.6 Frequency Output
The frequency output from the 2550 is an open collector signal
that requires a 5 to 12 VDC reference.
5.6.1 Product Compatibility
The frequency output of the 2550 is compatible with all
+GF+Signet flow instruments.
Black (+V)
5 to 12 VDC in
Red (Signal out)
Shield (Ground)
2550
2KΩ
TS 2

page 10 of 12 ‡ SIGNET 2550 InsertionMagmeter
5.7 Calibration data
Pipe type pipe pipe gpm/fps lpm/fps K A K A
size id pls/gal gpm/Hz pls/l lpm/Hz
PVC sched 80 3.5 in. 3.33 27.0803 102.51 55.39 1.08 14.63 4.10
PVC sched 40 3.5 in. 3.52 30.3488 114.88 49.43 1.21 13.06 4.60
steel sch 5S 3.5 in. 3.83 35.9843 136.22 41.68 1.44 11.01 5.45
steel sch 10S 3.5 in. 3.76 34.6087 131.01 43.34 1.38 11.45 5.24
steel sch 40S 3.5 in. 3.55 30.816 116.65 48.68 1.23 12.86 4.67
steel sch 80S 3.5 in. 3.36 27.7026 104.87 54.15 1.11 14.30 4.19
PVC sched 80 4 in. 3.79 35.089 132.83 42.75 1.40 11.29 5.31
PVC sched 40 4 in. 4.00 39.1289 148.12 38.33 1.57 10.13 5.92
steel sch 5S 4 in. 4.33 45.9819 174.06 32.62 1.84 8.62 6.96
steel sch 10S 4 in. 4.26 44.4251 168.17 33.76 1.78 8.92 6.73
steel sch 40S 4 in. 4.03 39.6786 150.2 37.80 1.59 9.99 6.01
steel sch 80S 4 in. 3.83 35.8343 135.65 41.86 1.43 11.06 5.43
PVC sched 80 5 in. 4.77 55.6521 210.67 26.95 2.23 7.12 8.43
PVC sched 40 5 in. 5.02 61.592 233.15 24.35 2.46 6.43 9.33
steel sch 5S 5 in. 5.35 69.9366 264.74 21.45 2.80 5.67 10.59
steel sch 10S 5 in. 5.30 68.6343 259.81 21.85 2.75 5.77 10.39
steel sch 40S 5 in. 5.05 62.3557 236.04 24.06 2.49 6.35 9.44
steel sch 80S 5 in. 4.81 56.7076 214.66 26.45 2.27 6.99 8.59
PVC sched 80 6 in. 5.71 79.7865 302.03 18.80 3.19 4.97 12.08
PVC sched 40 6 in. 6.03 89.0406 337.06 16.85 3.56 4.45 13.48
steel sch 5S 6 in. 6.41 100.489 380.4 14.93 4.02 3.94 15.22
steel sch 10S 6 in. 6.36 98.9267 374.48 15.16 3.96 4.01 14.98
steel sch 40S 6 in. 6.07 90.0473 340.87 16.66 3.60 4.40 13.63
steel sch 80S 6 in. 5.76 81.2466 307.55 18.46 3.25 4.88 12.30
PVC sched 80 8 in. 7.57 140.096 530.33 10.71 5.60 2.83 21.21
PVC sched 40 8 in. 7.94 154.408 584.5 9.71 6.18 2.57 23.38
steel sch 5S 8 in. 8.41 173.018 654.95 8.67 6.92 2.29 26.20
steel sch 10S 8 in. 8.33 169.822 642.85 8.83 6.79 2.33 25.71
steel sch 40S 8 in. 7.98 155.928 590.26 9.62 6.24 2.54 23.61
steel sch 80S 8 in. 7.63 142.328 538.77 10.54 5.69 2.78 21.55
PVC sched 80 10 in. 9.49 220.605 835.09 6.80 8.82 1.80 33.40
PVC sched 40 10 in. 9.98 243.625 922.23 6.16 9.75 1.63 36.89
steel sch 5S 10 in. 10.48 268.966 1018.2 5.58 10.76 1.47 40.73
steel sch 10S 10 in. 10.42 265.794 1006.1 5.64 10.63 1.49 40.24
steel sch 40S 10 in. 10.02 245.779 930.38 6.10 9.83 1.61 37.22
steel sch 80S 10 in. 9.75 232.712 880.92 6.45 9.31 1.70 35.24
PVC sched 80 12 in. 11.29 312.252 1182 4.80 12.49 1.27 47.28
PVC sched 40 12 in. 11.89 346.019 1309.8 4.34 13.84 1.15 52.39
steel sch 5S 12 in. 12.44 378.713 1433.6 3.96 15.15 1.05 57.34
steel sch 10S 12 in. 12.39 375.796 1422.6 3.99 15.03 1.05 56.90
steel sch 40S 12 in. 12.00 352.51 1334.4 4.26 14.10 1.12 53.38
steel sch 80S 12 in. 11.75 337.975 1279.4 4.44 13.52 1.17 51.18
Pipe type pipe pipe gpm/fps lpm/fps K A K A
size id pls/gal gpm/Hz pls/l lpm/Hz
U.S. pipe data
PVC sched 80 2 in. 1.91 8.95858 33.912 167.44 0.36 44.23 1.36
PVC sched 40 2 in. 2.05 10.2576 38.829 146.23 0.41 38.63 1.55
steel sch 5S 2 in. 2.25 12.3379 46.704 121.58 0.49 32.12 1.87
steel sch 10S 2 in. 2.16 11.3896 43.115 131.70 0.46 34.79 1.72
steel sch 40S 2 in. 2.07 10.459 39.592 143.42 0.42 37.89 1.58
steel sch 80S 2 in. 1.94 9.20375 34.84 162.98 0.37 43.05 1.39
PVC sched 80 2.5 in. 2.29 12.8375 48.596 116.85 0.51 30.87 1.94
PVC sched 40 2.5 in. 2.45 14.6341 55.397 102.50 0.59 27.08 2.22
steel sch 5S 2.5 in. 2.71 17.965 68.005 83.50 0.72 22.06 2.72
steel sch 10S 2.5 in. 2.64 16.9969 64.341 88.25 0.68 23.31 2.57
steel sch 40S 2.5 in. 2.47 14.8228 56.49 101.20 0.59 26.55 2.26
steel sch 80S 2.5 in. 2.32 13.2101 50.006 113.55 0.53 30.00 2.00
PVC sched 80 3 in. 2.86 20.0796 76.01 74.70 0.80 19.73 3.04
PVC sched 40 3 in. 3.04 22.6531 85.752 66.22 0.91 17.49 3.43
steel sch 5S 3 in. 3.33 27.2107 103 55.13 1.09 14.56 4.12
steel sch 10S 3 in. 3.26 26.0162 98.483 57.66 1.04 15.23 3.94
steel sch 40S 3 in. 3.07 23.042 87.224 65.10 0.92 17.20 3.49
steel sch 80S 3 in. 2.90 20.5876 77.933 72.86 0.82 19.25 3.12

page 11 of 12‡ SIGNET 2550 InsertionMagmeter
DIN Stan
d
ar
d
P
l
astic Pipe
Pipe typepipe pipe gpm/fps lpm/fps K A K A
size id pls/gal gpm/Hz pls/l lpm/Hz
PP bar 10 63 51.4 10.02 37.943 149.63 0.40 39.53 1.52
PP bar 10 75 61.2 14.21 53.791 105.55 0.57 27.89 2.15
PP bar 10 90 73.6 20.55 77.797 72.98 0.8219.28 3.11
PP bar 10 110 90 30.73 116.33 48.81 1.23 12.89 4.65
PP bar 10 125 102.2 39.63 150.01 37.85 1.59 10.00 6.00
PP bar 10 140 114.4 49.66 187.96 30.21 1.99 7.98 7.52
PP bar 10 160 130.8 64.92 245.71 23.11 2.60 6.10 9.83
PP bar 10 180 147.2 82.22 311.19 18.24 3.29 4.82 12.45
PP bar 10 200 163.6 101.56 384.39 14.77 4.06 3.90 15.38
PP bar 10 225 184 128.46 486.23 11.68 5.14 3.08 19.45
PP bar 10 250 204.4 158.53 600.03 9.46 6.34 2.50 24.00
PP bar 10 280 229 198.98 753.14 7.54 7.96 1.99 30.13
PP bar 10 315 257.6 251.79 953.01 5.96 10.07 1.57 38.12
PVDF bar 10 90 84.4 27.03 102.3 55.50 1.08 14.66 4.09
PVDF bar 10 110 103 40.25 152.36 37.26 1.61 9.84 6.09
PVDF bar 10 160 150 85.37 323.14 17.57 3.41 4.64 12.93
PVDF bar 10 200 187.6 133.54 505.44 11.23 5.34 2.97 20.22
PVDF bar 10 250 234.8 209.19 791.78 7.17 8.37 1.89 31.67
PVDF bar 16 63 57 12.33 46.661 121.67 0.49 32.15 1.87
PVDF bar 16 75 67.8 17.44 66.019 86.00 0.70 22.72 2.64
PVDF bar 16 90 81.4 25.14 95.161 59.66 1.01 15.76 3.81
PVDF bar 16 110 99.4 37.49 141.9 40.01 1.50 10.57 5.68
PVC bar 10 63 57 12.33 46.661 121.67 0.49 32.15 1.87
PVC bar 10 75 67.8 17.44 66.019 86.00 0.70 22.72 2.64
PVC bar 10 90 81.4 25.14 95.161 59.66 1.01 15.76 3.81
PVC bar 10 110 99.4 37.49 141.9 40.01 1.50 10.57 5.68
PVC bar 10 125 113 48.45 183.39 30.96 1.94 8.18 7.34
PVC bar 10 140 126.6 60.81 230.18 24.67 2.43 6.52 9.21
PVC bar 10 160 144.6 79.34 300.29 18.91 3.17 5.00 12.01
PVC bar 10 180 162.8 100.57 380.64 14.92 4.02 3.94 15.23
PVC bar 10 200 180.8 124.03 469.47 12.09 4.96 3.20 18.78
PVC bar 10 225 203.4 156.98 594.17 9.56 6.28 2.52 23.77
PVC bar 16 63 53.6 10.90 41.261 137.60 0.44 36.35 1.65
PVC bar 16 75 63.8 15.44 58.459 97.12 0.62 25.66 2.34
PVC bar 16 90 76.6 22.26 84.269 67.37 0.89 17.80 3.37
PVC bar 16 110 93.6 33.24 125.82 45.12 1.33 11.92 5.03
PVC bar 16 125 106.4 42.96 162.59 34.92 1.72 9.23 6.50
PVC bar 16 140 119.2 53.91 204.06 27.82 2.16 7.35 8.16
PVC bar 16 160 136.2 70.39 266.42 21.31 2.82 5.63 10.66

page 12 of 12 ‡ SIGNET 2550 InsertionMagmeter
5.8 Custom K-factor calculation
K-factors can be calculated for any pipe using the pipe id and the
ft/s engineering unit options. The procedure is based on the
relationship between the frequency output and the flow velocity:
20 ft/s = 500 Hz. therefore 1 ft/s = 25 Hz.
1. Install the 2550 in pipe according to sec 2.2.
2. Enter the pipe ID into the menu, and select Feet per Second
(FPS) as the engineering unit.
3. Establish a stable flow rate in the pipe. It is not important to
know what the rate is, just that it be stable.
4. Read the flow rate from display and multiply the display value
(ft/s) by 25. (frequency can be verified by monitoring TS2 if
desired.)
Record the result _____ ft/s = ________Hz.
5. Change the display to read in desired engineering units.
Do not change flow rate!
Record the result _____GPM = ________Hz.
6. Divide the flow rate by the frequency result of step 3. Record
the result:
Flow Rate/Hz = A =_______________
7. K = 60 / A = _________________
Example illustrates calculating a custom K-factor in
GPM for pipe with 3.068 in. id.
Unit = ft/s
Display = 5.2 ft/s
5.2 x 25 = 130 Hz
5.2 ft/s = 130 Hz.
Unit = GPM
Display = 120 GPM
120 GPM = 130 Hz.
A = 120
÷ 130 = 0.92
K = 60 ÷ 0.92 = 65.2
6. Ordering Information
Mfr. Part No. Code Description
3-2550.100-110 159 000 294 Insertion Magmeter with 2 in. NPT Fitting
3-2550.100-110T 159 000 632 Insertion Magmeter with 2 in. NPT Fitting and Installation Tool
3-2550.100-111 198 840 024 Insertion Magmeter with 2 in. ISO Fitting
3-2550.100-111T 198 840 025 Insertion Magmeter with 2 in. ISO Fitting and Installation Tool
Parts and Accessories
3-2550.355 159 000 296 Magmeter Installation Tool
1500-0101 159 000 239 Cable Connector (0.125 to 0.187 o.d.)
6400-0020 159 000 647 Fuse, Slo-Blo
1222-0439 159 000 235 Gasket, outer cover
3-2550.374 198 840 211 Access cover
1222-0439 198 840 212 Gasket, outer cover
1500-0101 N/A Cable connector (standard) for .125 to .187 o.d. cable
1500-0102 N/A Cable connector (optional) for .187 to .250 od cable
6400-0020 198 829 021 Fuse, 3/4 A slo-blo
3-2550.355 198 820 024 Installation tool
‡ SIGNET
Signet Scientific Company, 3401 Aerojet Avenue, El Monte, CA 91731-2882 U.S.A. • Tel. [phone] • Fax [phone]
For Worldwide Sales and Service, visit our website: www.gfsignet.com • Or call (in the U.S.): [phone]
GEORGE FISCHER +GF+ Piping Systems
3-2550.090 (G-12/02) English © Scientific Company 2002 Printed in U.S.A. on Recycled Paper