GF Signet 2552 User manual

Signet 2552 Magmeter
*3-2552.090*
3-2552.090 Rev. C 04/07
English
SAFETY INSTRUCTIONS
1. Depressurize and vent systems without Hot-tap valve prior to installation or removal.
2. Confirm chemical compatibility before use.
3. Do not exceed maximum temperature/pressure specifications.
4. Wear safety goggles or face shield during installation/service.
5. Do not disassemble or alter product construction.
6. Disconnect power before attempting any service or wiring.
Wetted Materials:
• 316L Stainless Steel body and electrodes
• PVDF Insulator
• O-rings: FPM standard, EPDM, Kalrez® optional
• Cable: 4-cond + shield, PVC jacket (Fixed cable models)
• Watertight rubber cable assembly w/NEMA 6P connector
(Submersible cable models)
Power Requirements
• 4 to 20 mA: 24 VDC nominal, 22.1 mA maximum
(21.6 VDC min. to 26.4 max.)
400 mV p-p maximum ripple voltage
• Frequency: 5 to 24 VDC nominal, 15 mA maximum
(5 VDC min. to 26.4 VDC max.)
• Digital (S3L): 5 VDC nominal, 15 mA maximum
(5 VDC min. to 6.5 VDC max.)
• Reverse polarity and short circuit protected
Performance
• Pipe size range: 2 in. to 48 in.
• Minimum Flow Range 0.05 m/s (0.15 ft/s)
Maximum Flow range: 10 m/s (33 ft/s)
• Linearity: ±1% reading + 0.1% of max. range
• Repeatability ±0.5% of reading @ 25°C
• Accuracy: ±2% of measured value (in
reference conditions where the fluid is water at ambient
temperature, the appropriate upstream and downstream
distances are observed, the sensor is inserted at the correct
depth and there is a fully developed flow profile which is in
compliance with ISO 7145-1982 (BS 1042 section 2.2))
• Minimum Conductivity: 20 µS/cm
Output Specifications
Current output (4 to 20 mA)
• Programmable and reversible
• Loop Accuracy: 32 µA max. error
(@ 25°C @ 24 VDC)
• Temp. drift: ±1 µA per °C max.
• Power supply rejection: ±1 µA per V
• Isolation: Low voltage <48 VAC/DC
from electrodes and auxiliary power
• Maximum cable: 300 m (1000 ft.)
• Max. Loop Resistance: 300 Ω
• Error condition: 22.1 mA
Frequency output:
• Compatible with Signet 5075, 5500, 5600, 8550 and 8900
• Max. Pull-up Voltage: 30 VDC
• Short Circuit Protected: ≤30 V @ 0Ωpull-up for one hour
• Reverse Polarity Protected to -40 V for 1 hour
• Overvoltage Protected to +40 V for 1 hour
• Minimum Current Sink: 50 mA
• Maximum cable: 300 m (1000 ft.)
Digital (S3L) Output:
• Compatible with Signet 8900
• Serial ASCII, TTL level 9600 bps
• Maximum cable: Application dependent
(See 8900 manual)
Tests, Approvals & Standards
• CE
• EN 61326 Emissions and Immunity for Control Equipment
Immunity: EN 61000-6-1
Emissions: EN 55011 class B
Environmental
• NEMA 4 / IP65 (Fixed cable models only)
• NEMA 6P / IP68 (Submersible cable models only)
• Storage Temperature: -15°C to 70°C (5°F to 158°F)
(non-icing conditions)
• Operating Temperature (non-icing conditions)
Ambient: -15°C to 70°C (5°F to 158°F)
Media: -15°C to 85°C (5°F to 185°F)
• Max. operating pressure:20.6 bar @ 25°C (300 psi @ 77°F)
Specifications
10 100
158 185 212
-10
41
20-20 30 40 50 60 70 80 90
59 71
°F
°C
5
0
0
0.9
150
175
300
200
225
50
25
2.6
75
100
125
23
250
275
95 113 131
20.6
11.2
7.8
9.5
16.4
bar psi
Safe to operate Hot-tap
Safe Media Pressure
and
Temperature Range
14.7
18.1
12.9
4.3
6.0
19.8

2 2552 Magmeter
Selecting a Location
• The 2552 requires a fully developed turbulent flow profile for
accurate measurement.
• If the piping system harbors air pockets or bubbles, locate
the sensor so the air pockets will not contact the electrodes.
• New magmeters should be allowed to soak in a full pipe for
24 hours before operation. This is especially important if the
conductivity of the process liquid is less than 100 μS.
• 2552 Magmeters equipped with the submersible cable
are rated NEMA 6P (IP68). These units can withstand
submersion to depths no greater than 2 m (6 ft.) for
prolonged periods.
• 2552 Magmeters with fixed cables are rated NEMA 4 / IP65.
They are NOT suitable for submersion.
Select a location with sufficient distance of straight pipe
immediately upstream of the sensor.
Locating the sensor in a trap or where the flow is upward helps to
protect the sensor from exposure to air bubbles when the system
is in operation.
NOTE: The system should be designed to keep the sensor wet at
all times.
These configurations are not recommended because it is difficult
to keep the pipe full.
In a gravity-flow system, the tank must be designed so the level
does not drop below the outlet.
This causes the pipe to draw air in from the tank.
If air bubbles pass across the Magmeter electrodes, the output
will become erratic.
15 x I.D. 5 x I.D.
Reducer
+GF+
10 x I.D. 5 x I.D.
Inlet Outlet
Flange
+GF+
50 x I.D. 5 x I.D.
Valve/Pump
+GF+
40 x I.D. 5 x I.D.
2 x 90° Elbow
3 dimensions
+GF+
25 x I.D. 5 x I.D.
2 x 90° Elbow
+GF+
20 x I.D. 5 x I.D.
90° Elbow
+GF+
+GF+
+GF+
+GF+
O.K.O.K. O.K.
+45°
-45°
Mounting the sensor upright is OK only where the pipe is full and
no air pockets are present at the top of the pipe.
Mount at a maximum of 45° when air bubbles are present.
Do not mount on the bottom of the pipe if sediments are present.
Dimensions
25.4 mm
1.0 in.
41 mm
1.6 in.
2552-2 models
289 mm
11.38 in.
2552-1 models
238 mm
9.38 in.
2552-2 models
257 mm
10.1 in.
2552-1 models
206 mm
8.1 in.
2552-2 models
238 mm/9.38 in.
2552-1 models
187 mm/7.38 in.
1¼ in. NPT
threads
131 mm
5.14 in.
32 mm
1.25 in.
76 mm
3.0 in.
Stroke length
+GF+
+GF+
+GF+

32552 Magmeter
2. Install the Magmeter into the pipe
• Apply sealing tape or paste to the male threads of the sensor
nut and thread it securely into the pipe fitting.
The sensor is marked to identify the downstream
alignment. The arrow MUST point DOWNSTREAM.
Wear gloves to grip the sensor. Hold the sensor
securely while threading the sensor nut into the fitting. Do not
allow the magmeter cable to become twisted while turning
the nut.
1. Prepare the pipe:
• Cut a 32 mm (1¼ in.) opening in the pipe.
• Install a 1¼ inch outlet onto the pipe.
This fitting must withstand pressures up to 20 bar (300 psi).
Pipe Top View
Align Magmeter with pipe ±1°
H
FLOW →
FLOW →
FLOW →
FLOW →
FLOW →
FLOW →
Set Screw
Hex Wrench
3. Adjust the magmeter position and insertion depth
• Find the H-dimension for your specific pipe size on pages 10-11.
• Insert the brass rod through the alignment opening at the top of
the sensor. Adjust the height of the magmeter until:
• The distance (H) from the OUTSIDE of the pipe to the bottom of
the alignment rod is equal to the H-dimension.
• The alignment rod is parallel to the pipe ±1°.
Misalignment will cause inaccurate measurement.
• A dry lubricant is applied to the threaded column at the factory.
If necessary, re-apply a suitable lubricant to the threaded column
to facilitate smooth operation.
4. Secure the Magmeter in position
• Secure the fitting by tightening the set screw on the side of the sensor assembly.
A set screw wrench is provided in the magmeter package.
• Secure the height adjustment by installing the two pipe clamps.
• Spread the clamp apart to wrap it around the threaded stem.
• Place one clamp immediately above and one clamp immediately below the
magmeter adjustment hub.
• Squeeze the clamp together until it is firmly locked around the threads.
•Not supplied:
• Female pipe fitting (weld-on or saddle)
with 1¼ in. NPT or ISO 7/1-Rc 1¼ threads
• 32 mm (1¼ in.) diameter drill
• Pipe thread sealant suitable for application
• Pipe wrench
Standard Magmeter Installation
The following items are required to properly install the Magmeter:
• Supplied with 2552 Magmeter:
• 12-inch Ruler
• Brass alignment rod
• H-dimension value for your pipe (See pages 10-11)
• Hex wrench
• 2 clamp rings

4 2552 Magmeter
•Not supplied:
• Female pipe fitting (weld-on or saddle)
with 1¼ in. NPT or ISO 7/1-Rc 1¼ threads
• 32 mm (1¼ in.) pipe nipple
• 32 mm (1¼ in.) ball valve
• 32 mm (1¼ in.) drill bit
• Pipe thread sealant suitable for application
• Pipe wrench
2. Install the Magmeter into the pipe
• Apply sealing tape or paste to the male threads of the sensor nut and
thread it securely into the pipe fitting.
The sensor is marked to identify the downstream alignment. The
arrow MUST point DOWNSTREAM.
Wear gloves to grip the sensor. Hold the sensor securely while
threading the sensor nut into the fitting. Do not allow the magmeter
cable to become twisted while turning the nut.
1. Prepare the pipe:
• Install a 1¼ inch outlet onto the pipe.
This fitting must withstand pressures up to 20 bar (300 psi).
• Thread the 1¼ in. pipe nipple into the outlet. Use a suitable paste or sealing tape to provide a
leakproof connection.
• Thread the 1¼ in. ball valve onto the pipe nipple.
Position the valve handle so it is parallel to the pipe. This will prevent the valve handle from
interfering with the adjustment and alignment of the magmeter.
• Cut a 32 mm (1¼ in.) opening in the pipe.
Hot- tap drilling requires special tools and skills.
This task should only be performed by qualified personnel.
3. Adjust the magmeter position and insertion depth
• Find the H-dimension for your specific pipe size on pages 10-11.
• Insert the brass rod through the alignment opening at the top of the sensor. Adjust the height of
the magmeter until:
• The distance (H) from the OUTSIDE of the pipe to the bottom of the alignment rod is equal to
the H-dimension.
• The alignment rod is parallel to the pipe ±1°.
Misalignment will cause inaccurate measurement.
• Supplied with 2552 Magmeter:
• 12-inch Ruler
• Brass alignment rod
• Allen wrench
• 2 clamps
• H-dimension value for your pipe (See pages 10-11)
Hot-tap Magmeter Installation
The following items are required to properly install the Magmeter through a Hot-tap valve:
FLOW →
FLOW →
FLOW →
FLOW →
FLOW →
H
FLOW →
Set Screw
S
et Screw
W
rench
FLOW →
4. Secure the Magmeter in position
• Secure the fitting by tightening the set screw on the side of the sensor assembly. A set screw
wrench is provided in the magmeter package.
• Secure the height adjustment by installing the two pipe clamps:
• Spread the clamp apart to wrap it around the threaded stem.
• Place one clamp immediately above and one clamp immediately below the magmeter
adjustment hub.
• Squeeze the clamp together until it is firmly locked around the threads.

52552 Magmeter
General Installation and Grounding Tips
Sensor conditioning
The Magmeter output signal may be unstable immediately after installation. Allowing the sensor to soak in a full pipe (or in any
container of water) for 24 hours will stabilize the performance.
• Very low conductivity fluids may require a longer conditioning period. (The Magmeter may not operate properly in fluids where the
conductivity is less than 20 µS/cm.)
Grounding
The 2552 Magmeter is unaffected by moderate levels of
electrical noise, especially if installed in a properly grounded
metal piping system. However, in some applications it may
be necessary to ground portions of the system to eliminate
electrical interference. The grounding requirements will vary
with each installation.
One or more of the following steps may be applied if the 2552
Magmeter is affected by electrical noise:
Connect a wire (14 AWG/2.08 mm2 recommended) from
the ground terminal screw on the outside of the sensor nut
directly to a local Earth ground.
Install fluid grounding devices immediately upstream and
downstream of the Magmeter.
Connect the fluid grounds to the Earth ground terminal on
the 2552.
Use flanged grounding rings or metal electrodes on plastic
pipes, or metal clamps on metal pipes.
Fluid grounds must be in direct contact with the fluid, and
as near to the Magmeter as possible.
Connect the SHIELD conductor to Earth ground at the
instrument.
Grounding rings on plastic pipe
(Installed between flanges)
(10 cm to 1.3 m) (10 cm to 1.3 m)
4 in. to 50 in. 4 in. to 50 in.
FLOW →
→
Blue
Black
Brown
White
Shield
3.
Flow 6.25 GPM
Total 1234567.8>
ENTER
Signet Flow
Transmitter
1.
2. 2.
Bi-Directional Flow
The 2552 magmeter is designed to measure bi-directional flow.
• 4-20 mA output models: May be scaled to span any flow range:
For example: "4 to 20 mA = -100 GPM to +100 GPM"
• Frequency output models: Reverse flow is processed same as forward flow.
• Digital (S3L) output models: Reverse flow results in 0 flow rate displayed on the
8900 Multi-parameter Controller.
• The forward flow direction is indicated at the base of the sensor. The arrow must point
DOWNSTREAM. FLOW →
FLOW→
Removal Instructions
REDUCE THE PROCESS TEMPERATURE TO LESS THAN 40°C (104°F)
• Remove the plastic clamp from the top of the assembly.
• Turn the sensor nut to the top of the threads to retract the sensor.
A light lubricant can be applied to the threads if required.
• Close the valve.
Install a LOCKOUT TAG on the closed valve to prevent accidents!
• Remove the magmeter from the top of the valve.
• Loosen the set screw from the sensor adapter fitting.
• Use one pipe wrench to hold the valve in place while turning the sensor adapter with
a second wrench.
UNDER PRESSURE!
HOLD VALVE IN PLACE!
Turn magmeter adapter ONLY!
CLOSE VALVE
BEFORE REMOVING MAGMETER!
DANGER!
DO NOT
DO NOT
OPEN
OPEN
THIS VALVE
THIS VALVE
This lock/tag may
only be removed by:
Name ___________
Dept. ____________
Expected date for
completion:_________

6 2552 Magmeter
• The 2552 outputs an open collector frequency signal
that can be connected to any powered Signet flow
meter. (Models 5075, 5500, 5600, 8550, 8900.)
• DC power is provided to the 2552 Magmeter by
all Signet flow instruments. No additional power is
required.
• If connecting the 2552 Magmeter to a flow instrument
from another manufacturer, 5 to 24 VDC power must
be provided to the 2552. A 10 KΩpull up resistor
must also be connected between the +V (Black) and
the Freq. Out (Red) wires
Wiring: Frequency output (Compatible with all POWERED Signet Flow instruments.)
Wiring: S3L output (Compatible with 8900 Multi-Parameter Controller only)
Wiring the 3-2552 with Frequency or Digital (S3L) output
Connect AUX power on the 8550 to provide
power for the 2552 output signal.
3-8900.621C
I/O Module 3-8900.401-X
1
2
3
4
5
6
7
8
+5VDC (Black)
Freq. Input (Red)
GND (Shield)
+5VDC (Black)
Freq. Input 2 (Red)
S L (Red)
3
Frequency
Input
1
Frequency
Input 2
OR
S3L
Input
2
White
Blue
Brown
Black
8900 Multi-Parameter Controller
Shield
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
+
-
+
-
White
Blue
Brown
Black
Shield
The following page outlines each step in the Magmeter Setup Tool software.
8550-1 Flow Transmitter
5-24 VDC
Sensor Ground
Frequency Out
10 KΩ
Install a pull-up resistor when
connecting the 2552 Magmeter
to other manufacturer's flowmeters.
White
Blue
Brown
Black
White
Blue
Brown
Black
9
8
7
Sensr IN
(RED)
Sensr V+
(BLACK)
Sensr Gnd
(SHIELD)
N
on-
Si
gnet
I
nstrument
Shield
Shield
• The 2552 receives 5 VDC power from the 8900.
No additional power is required.
NOTE:
The maximum cable length from the 2552 to the 8900
depends on the 8900 configuration. Refer to the
8900 manual for complete information.
Wiring the 2552-XX-12 Magmeter with 4-20 mA Loop Output
The 2552 Magmeter is a traditional 2-wire passive 4-20 mA loop
transmitter.
• External loop power (24 VDC ±10%) is required. See
Ordering Information for power supplies.
The maximum loop resistance the Magmeter can
accomodate is 300 Ω.
The cable length from the Magmeter to the loop monitor
cannot exceed 300 m (1000 ft.)
• All 2552 Magmeters are shipped from the factory with the
4-20 mA output scaled for 0 to 5 m/s (0 to 16.4 ft/s). If this
operating range is suitable, no adjustments are necessary.
The calibration charts in this manual list the 20 mA setpoint
for each pipe size. Use this information to program the 4-20
mA range of the loop device (PLC, Datalogger, recorder, etc.)
2552 Magmeter
4-20 mA Loop
monitor
(Maximum 300 Ω)
+
+
-
-
24 VDC ± 10%
Brown X
Blue X
White Loop - (Ground)
Black Loop + (24 VDC)

72552 Magmeter
Custom System Span and Setup
• The 3-0232 Setup tool enables the user to configure the 2552 Magmeter to suit the application.
• The Setup tool connects the 2552 to a computer by converting the serial data output into standard RS232 format.
• The computer operating system must be Windows 98, 2000, 2000 Pro, XP, XP Pro ONLY.
• The 3-0232 Setup tool is not compatible with any other operating system.
• Managed and network systems may have security measures enabled that interfere with the installation of this program.
See the network administrator or IT staff if the program cannot be installed.
• Collect the Equipment and information that will be required:
• 3-0232 Setup Tool (Includes one RS232 Converter and one CD-ROM with software)
• 24 VDC ISOLATED power source.
• Personal computer with:
Intel Pentium or Higher or AMD 1800 or Higher
Windows 98, 2000, 2000 Pro, XP, XP Pro operating system
CD ROM Reader capable of reading ISO 9660 Format
Free Disk Space Of 400 KB
• DB9 serial-to-USB converter cable
(required only for computers that do not have a DB9 serial port available.)
• Pipe data (id, K-factor from
• Measurement Preferences (engineering units, timebase)
• Install the software onto the computer:
1. Insert the CD-ROM into a computer that is running on Win98, Win2000, or Win XP.
2. Click the START button, then Run. Click the BROWSE button and navigate to the CD drive and select the Setup.exe file. Click
Open, then click OK.
3. If unable to install the program, contact the system administrator for assistance.
• Connect the Magmeter to the computer:
1. Remove the cover from the Magmeter.
2. Connect the 2552 output terminals 2 and 4 to the input terminals of the RS232 Interface.
3. Connect the isolated 24 VDC power source to the 2552, terminals 1 and 3.
4. Connect the DB9 serial output connector from the RS232 Interface to the computer.
Note: If the computer does not have an available DB9 serial port, use a serial-to-USB converter cable.
Signet recommends cable model USA-19HS by Keyspan. (www.keyspan.com)
CAUTION!
TURN 24 VDC POWER
OFF WHEN WIRING
THE MAGMETER.
Windows PC
DB9-to-USB Adapter Cable
(Keyspan # USA-19HS)
Vaux+
GND
5Vout+
Data
GND
S3L-to-RS232
Converter
Black
White
Blue
Brown
Isolated 24 VDC
Power Supply
DB9 Connector
+-

8 2552 Magmeter
Using the 3-0232 i-Go S3L to RS232 Converter and Setup Tool to customize the 3-2552 Magmeter
Procedure:
1. Set the general information about the pipe and application preferences in the Application Settings fields.
Note: Press the "Restore Factory Settings" button while all fields are blank to load the setup program with factory settings.
After a value is entered into any field, the "Restore Factory Settings" button will not change them.
Flow/Velocity Units (factory set: Meters)
• Select the engineering units from the list: meters, feet, cubic meters, liters, cu. ft., U.S. gallons, Imp. gallons.
Timebase (factory set: Seconds)
• Set the timebase preference: seconds, minutes, hours, days
Pipe ID (Inside Diameter) (factory set: 44.0)
• Enter the inside diameter of the pipe.
ID Units: (factory set: millimeters)
• Select inches or mm for the dimensions of the pipe.
NOTE: Check all associated settings after changing the units.
This program does not convert values automatically.
K-Factor (factory set: 65.7665)
• K-factors are published in the Magmeter manual as "pulses
per gallon" and "pulses per liter".
2. Set the 4-20 mA span (4-20 mA output models only)
• Enter the flow rate at 4 mA. (Factory set: 0 m/s)
• Enter the flow rate at 20 mA. (Factory set: 5 m/s)
• When the RESTORE FACTORY SETTINGS button is pressed,
the 20 mA setpoint will be restored to the equivalent of 5 m/s, in
terms of the Flow units and Timebase selected above.
3. Set the Performance Settings to best accomodate the
unique conditions in the pipe.
Averaging Time in Seconds (Factory set: 14 seconds)**
• Select the time the Magmeter will use as the averaging
period.
Example: With averaging at 14 seconds, each display is an
average of the previous 14 seconds input.
Use higher averaging times to smooth the display and
current output where the flow in the pipe is erratic.
Quick Response Sensitivity (Factory set: 25% of Max Range, or 2.5 m/s)**
• Set the percentage of change in the flow rate required to
allow the Magmeter to override the AVERAGING and jump
to a new flow rate immediately.
(2552 maximum range is 10 m/s)
A detailed explanation of averaging and sensitivity functions
is provided on the following page.
Noise Rejection Frequency (Factory set: 60 Hz)**
• Select 50 Hz or 60 Hz according to local AC power specifications.
Low Flow Cut-off (Factory set: 0.05 m/s)
• Set the flow rate where all Magmeter outputs will be forced to zero.
(When the flow rate drops below this value, the frequency output will be 0 Hz. and the current output will be 4 mA.)
4. Click "Write Settings to Sensor" at the bottom of the display to download the new settings to the Magmeter.
• To repeat the same settings in another Magmeter, remove 24 VDC Power to the magmeter and connect the second Magmeter.
• Click "Write Settings to Sensor" again.
• Click "Read Sensor Settings" to validate the new settings.
Note: All settings are lost when you exit the program.
Sensor Information
Serial Number, Sensor Type:
• Information for these fields is read from the Magmeter when you press the "Read Sensor Settings" button.
Messages
• Displays messages related to the current selection. Error messages and procedure instructions appear here.
Controls
• Read sensor settings: Read information and setup values from the Magmeter into this setup display.
• Restore factory settings: Restores Loop and Performance settings to original factory values.
Press this button before entering any data into the program if you want to load all factory settings.
• Write settings to sensor: Copies all of the settings in this setup display into the Magmeter.
• Load settings from file: Load a saved meter setup file into the Magmeter Setup Tool.
• Save settings to file: Save a meter setup file on your local hard drive to be used again.
Note: If a Low flow Cutoff or a 4-20 mA field turns
RED, the value entered is outside of the allowable
range. The maximum allowable value will be
automatically loaded.
** SELECT FROM PULL-DOWN MENU ONLY.
Direct text input will not be accepted. Error message
will appear: "Cannot write all settings to sensor."

92552 Magmeter
AVERAGING Only
With AVERAGING set to 60 seconds and SENSITIVITY set to
100%, the flow rate is stabilized, but a sharp change in flow rate
is not represented for 60 seconds or longer. This can cause
system problems if one of the operating setpoints falls within this
range.
AVERAGING and SENSITIVITY
With AVERAGING at 60 seconds and SENSITIVITY set to 25%,
the flow rate is stabilized, but the sudden shift in flow is reflected
very quickly.
No AVERAGING, no SENSITIVITY
With AVERAGING set to 0 (zero) the SENSITIVITY is ineffective,
and the flow rate may be very unstable. This will cause the output
signals to respond erratically.
Velocity
10 s 20 s 30 s 40 s 50 s 60 s 70 s
Time
Velocity
10 s 20 s 30 s 40 s 50 s 60 s 70 s
Time
Velocity
2552 Magmeter Averaging and Sensitivity Settings
Because ideal flow conditions are often impossible to achieve, the flow rate is often erratic, which causes any control features (ie;
relays, 4-20 mA loops, etc.) that are associated with the flow rate to also be erratic.
The best solution to these problems is to correct the piping deficiencies that cause 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. But in many situations these
measures are simply not possible.
The 2552 Magmeter provides several tools that are designed to "work around" these deficiencies. They are called "Performance
Settings" and can be modified only through the i-Go S3L to RS232 Converter and the Magmeter Setup Tool. The noise rejection
and the Low Flow Cutoff settings are self-explanatory. The Averaging and the Sensitivity features should be studied before making
adjustments.
Averaging Time in Seconds (Factory set: 14 seconds)
• Set the time the Magmeter will use as the averaging period.
With averaging at 14 seconds, each display is an average of the previous 14 seconds input.
Use higher averaging times to smooth the display and current output where the flow in the pipe is erratic.
Quick Response Sensitivity (Factory set: 25% of Maximum Range, or 2.5 m/s)
• Set the percentage of change in the flow rate required to allow the Magmeter to override the AVERAGING and jump to a new flow
rate immediately. (2552 maximum range is 10 m/s)
The pictures below illustrate the effect of these settings.

10 2552 Magmeter
Calibration Data: K-factors and Full Scale Current Values
Pipe Size (Inch) Schedule OD (Inches) WALL (Inches) ID (Inches) H Dim mm -1 Version H Dim mm -2 Version K-Factor Pulse/liter K-Factor Pulse/Gal Factory set 20 mA (liter/min) Factory set20 mA (GPM)
/32 inch mm /32 inch mm
240 2.375 0.15 2.07 8 16/32 216.4 10 16/32 267.0 46.19 174.83 649.5 171.6
80 2.375 0.22 1.94 8 15/32 215.1 10 15/32 265.9 52.49 198.68 571.5 151.0
2 ½ 40 2.875 0.20 2.47 8 14/32 214.1 10 14/32 264.9 32.37 122.54 926.7 244.8
80 2.875 0.28 2.32 8 12/32 212.6 10 12/32 263.4 36.57 138.42 820.3 216.7
340 3.500 0.22 3.07 8 12/32 212.3 10 12/32 263.1 20.97 79.36 1431 378.0
80 3.500 0.30 2.90 8 10/32 210.6 10 9/32 261.4 23.47 88.82 1278 337.8
3½ 40 4.000 0.23 3.55 8 10/32 210.8 10 10/32 261.6 15.68 59.34 1914 505.6
80 4.000 0.32 3.36 8 8/32 208.9 10 8/32 259.7 17.44 66.01 1720 454.5
440 4.500 0.24 4.03 8 8/32 209.3 10 8/32 260.1 12.18 46.09 2464 651.0
80 4.500 0.34 3.83 8 6/32 207.3 10 5/32 258.1 13.48 51.03 2225 587.9
540 5.563 0.26 5.05 8 4/32 206.2 10 4/32 257.0 7.748 29.33 3872 1023
80 5.563 0.38 4.81 8 203.8 10 254.6 8.519 32.25 3521 930.4
640 6.625 0.28 6.07 8 203.0 10 253.8 5.365 20.31 5591 1477
80 6.625 0.43 5.76 7 28/32 200.0 9 28/32 250.8 5.946 22.51 5045 1333
840 8.625 0.32 7.98 7 24/32 197.1 9 24/32 247.9 3.098 11.73 9683 2558
80 8.625 0.50 7.63 7 20/32 193.5 9 20/32 244.3 3.394 12.85 8838 2335
10 40 10.75 0.37 10.0 7 16/32 190.8 9 16/32 241.6 1.966 7.440 15262 4032
80 10.75 0.59 9.56 7 11/32 186.2 9 11/32 237.00 2.158 8.170 13899 3672
12 STD 12.75 0.38 12.0 7 10/32 185.6 9 10/32 236.4 1.371 5.187 21890 5783
XHY 12.75 0.50 11.8 7 7/32 183.0 9 6/32 233.8 1.429 5.410 20987 5545
14 30 14.00 0.38 13.3 7 6/32 182.4 9 6/32 233.2 1.124 4.255 26688 7051
XHY 14.00 0.50 13.0 7 3/32 179.8 9 3/32 230.6 1.168 4.420 25690 6787
16 30 16.00 0.38 15.3 7 177.3 9228.1 0.849 3.212 35352 9340
40/
XHY 16.00 0.50 15.0 6 28/32 174.8 8 28/32 225.6 0.877 3.320 34202 9036
18 STD 18.00 0.38 17.3 6 25/32 172.2 8 25/32 223.0 0.663 2.510 45233 11950
XHY 18.00 0.50 17.0 6 22/32 169.7 8 22/32 220.5 0.683 2.585 43931 11610
20 20/
STD 20.00 0.38 19.3 6 18/32 167.1 8 19/32 217.9 0.533 2.016 56330 14880
30/
XHY 20.00 0.50 19.0 6 16/32 164.6 8 16/32 215.39 0.547 2.069 54876 14500
22 20/
STD 22.00 0.38 21.3 6 12/32 162.1 8 12/32 212.85 0.437 1.654 68643 18136
30/
XHY 22.00 0.50 21.0 6 9/32 159.5 8 9/32 210.31 0.448 1.694 67037 17711
24 20/
STD 24.00 0.38 23.3 6 6/32 157.0 8 6/32 207.77 0.365 1.382 82172 21710
XHY 24.00 0.50 23.0 6 3/32 154.4 8 3/32 205.23 0.373 1.412 80414 21246
The data in this table is based on dimensions of metal pipe per ANSI 36.10 and ANSI 36.19.
Stainless steel and carbon steel pipe schedules are the same according to ANSI standards.