GF Signet 2552 User manual

The Signet 2552 Metal Magmeter from Georg Fischer features all-stainless steel
construction. The PVDF nosepiece and FPM O-rings are the only other wetted materials.
The 2552 installs quickly into standard 1¼ in. or 1½ in. pipe outlets, and is adjustable to
t pipes from DN50 to DN2550 (2 to 102 inches). Two sensor lengths allow maximum
exibility to accommodate a variety of hardware congurations, including ball valves for
hot-tap installations.
When equipped with the frequency output, the 2552 is compatible with any Signet ow
instrument, while the S3L Digital output enables multi-channel compatibility with the
Signet 8900 Multi-Parameter Flow Controller. Select the blind 4 to 20 mA current output to
interface directly with dataloggers, PLCs or telemetry systems.
Key features include Empty Pipe Detection, LED-assisted troubleshooting, and Bi-
Directional span capability (in 4 to 20 mA models).
The Signet 3-0252 Conguration Tool is available to customize every performance feature
in the 2552 so it can be adapted to the user's application requirements.
*3-2552.090*
3-2552.090 Rev. 6 10/18
Signet 2552 Metal Magmeter
English
Operating Instructions
Description
Table of Contents
• English
• Deutsch
• Français
• Español
• Italiano
• Português
• 中文
3-2552-33-2552-2
Warranty information .............................................................................. 2
Product Registration............................................................................... 2
Safety Information .................................................................................. 2
Environmental Recomendations............................................................. 2
Specications ...................................................................................... 2-3
Dimensions............................................................................................. 4
Selecting a Location ............................................................................... 4
General Installation................................................................................. 4
Vertical Installation.................................................................................. 4
Horizontal Installation ............................................................................. 5
Sensor Conditioning ............................................................................... 5
Grounding............................................................................................... 5
Preparing for Installation......................................................................... 6
H-Dimension........................................................................................... 6
Magmeter Installation ............................................................................. 7
Frequency Output Wiring........................................................................ 9
Digital (S3L) Output Wiring...................................................................... 9
4 to 20 mA Loop Output Wiring ............................................................ 10
Calibration Data............................................................................... 11-12
Technical Support ................................................................................. 13
Troubleshooting.................................................................................... 14
Maintenance......................................................................................... 14
Sensor Selection .................................................................................. 15
Ordering Information............................................................................. 16

2Signet 2552 Metal Magmeter
1. Depressurize and vent systems without Hot-tap valve 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 face shield during installation/service.
5. Do not disassemble or alter product construction.
6. Disconnect power before attempting any service or wiring.
Performance
Pipe size range..................DN50 to DN2550 (2 in. to 102 in.)
Flow Range
Minimum............................0.05 m/s (0.15 ft/s)
Maximum........................... 10 m/s (33 ft/s) for pipes
up to DN 1200 (48 in.)
3 m/s (10 ft./s) for pipes
over DN 1200 (48 in.)
Linearity............................. ±(1% reading + 0.01 m/s)
±(1% reading + 0.033 ft/s)
Repeatability......................±0.5% of reading @ 25 °C
Accuracy:
±2% of measured value (in reference conditions where
the uid is water at ambient temperature, the sensor is
inserted at the correct depth and there is a fully
developed ow prole which is in compliance with
ISO 7145-1982 (BS 1042 section 2.2))
Minimum Conductivity .......20 µS/cm
Wetted Materials
Body and Electrodes .........316L Stainless Steel
Insulator.............................PVDF
O-rings...............................FPM (standard)
Cable ................................. 4-cond + shield, PVC jacket
(Fixed cable models) or Water-
resistant rubber cable assembly
with Turck® NEMA 6P connector
Power Requirements
4 to 20 mA ......................... 24 VDC ± 10%, regulated,
22.1 mA maximum
Frequency.......................... 5 to 24 VDC ± 10%, regulated,
15 mA maximum
Digital (S3L)........................ 5 to 6.5 VDC, 15 mA maximum
Reverse polarity and short circuit protected
Cable Options
• Fixed 7.6 m (25 ft) cable
• Custom lengths available, contact Georg Fischer Signet
signet-specialproduct@georgscher.com
• Detachable water tight sensor cable with Turck® connector
sold separately, two lengths: 4 m (13 ft) or 6 m (19.5 ft)
Current Output (4 to 20 mA): Programmable and reversible
Factory Range...................4 to 20 mA = 0 to 5 m/s
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
Caution / Warning / Danger
Indicates a potential hazard. Failure to follow all warnings
may lead to equipment damage, injury, or death
Electrostatic Discharge (ESD) / Electrocution Danger
Alerts user to risk of potential damage to product by ESD,
and/or risk of potential of injury or death via electrocution.
Personal Protective Equipment (PPE)
Always utilize the most appropriate PPE during
installation and service of Signet products.
Pressurized System Warning
Sensor may be under pressure, take caution to vent
system prior to installation or removal. Failure to do so
may result in equipment damage and/or serious injury.
Note / Technical Notes
Highlights additional information or detailed procedure.
Refer to your local Georg Fischer Sales ofce for the most
current warranty statement.
All warranty and non-warranty repairs being returned must
include a fully completed Service Form and goods must be
returned to your local GF Sales ofce or distributor.
Product returned without a Service Form may not be warranty
replaced or repaired.
Signet products with limited shelf-life (e.g. pH, ORP, chlorine
electrodes, calibration solutions; e.g. pH buffers, turbidity
standards or other solutions) are warranted out of box but not
warranted against any damage, due to process or application
failures (e.g. high temperature, chemical poisoning, dry-out) or
mishandling (e.g. broken glass, damaged membrane, freezing
and/or extreme temperatures).
Thank you for purchasing the Signet line of Georg Fischer
measurement products.
If you would like to register your product(s), you can now
register online in one of the following ways:
• Visit our website www.gfsignet.com.
Under Service and Support click on
Product Registration Form
• If this is a pdf manual (digital copy), click here
Specications
Warranty Information
Product Registration
Safety Information
When used properly, this product presents no inherent danger
to the environment.
Please follow all appropriate local ordinances when disposing
of this or any product with electronic components.
Environmental Recommendations

3
Signet 2552 Metal Magmeter
Frequency output
Compatible ........................Signet 8550-3, 8900, 9900
Max. Pull-up Voltage..........30 VDC
Short Circuit Protected ...... ≤ 30 V @ 0 Ω pull-up for one hour
Reverse Polarity ................Protected to -40 V for 1 hour
Overvoltage .......................Protected to +40 V for 1 hour
Max. Current Sink..............50 mA, current limited
Maximum cable .................300 m (1000 ft)
Digital (S3L) Output
Compatible with Signet 8900 and 9900
Serial ASCII, TTL level 9600 bps
Maximum cable ................. Application dependent
(See 8900 manual)
Environmental
• NEMA 4 (IP65) (xed cable models)
• NEMA 6P (IP68) (Submersible cable models only):
Signet recommends maximum 3 m. (10 ft) submersion
depth for maximum 10 days continuous submersion.
Standards and Approvals
• CE, RoHS Compliant
• U.S. Patent No.: 7,055,396 BI
• Manufactured under ISO 9001 for Quality,
ISO 14001 for Environmental Management and
OHSAS 18001 for Occupational Health and Safety.
China RoHS (visit gfsignet.com for details)
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.
Media Temperature
Operating Pressure
10
100
158 185
212
-10
41
20-20 30 40 50 60 70 80 90
59 77
°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
14.7
18.1
12.9
4.3
6.0
19.8
2552 Magmeter
Temperature-Pressure Operating Range
Safe for operation of the Hot-Tap
Safe Media Pressure
and
Temperature Range
Do not use hot-tap installation where temperatures
will exceed 40 °C or if hazardous liquids are present.
Temperature Rating
Storage Temperature......... -15 °C to 70 °C (5 °F to 158 °F)
in non-icing conditions
Operating Temperature
• Ambient ......................... -15 °C to 70 °C (5 °F to 158 °F)
in non-icing conditions
• Media ............................ -15 °C to 85 °C (5 °F to 185 °F)
Max. Operating Pressure
20.7 bar @ 25 °C (300 psi @ 77 °F)
Hot-Tap Installation Requirements
Maximum Pressure............20.7 bar (300 psi)
Maximum Temp. ................40 °C (104 °F)
Specications Cont.
Warning: For applications with diameters greater
than DN1200 (122 cm or 48 inches) with a uid
velocity exceeding 3 m / s (10 ft / s), contact your
local sales ofce for technical assistance.

4Signet 2552 Metal Magmeter
• The 2552 requires a fully developed turbulent ow prole for accurate measurement. Selecting the correct location in the
piping system is critical to the performance of the magmeter.
• Locate the magmeter where air bubbles will not contact the electrodes.
• Placing the sensor in a vertical section of pipe, with ow going UPHILL is the rst choice for this requirement.
• The piping system should be designed to keep the sensor wet at all times.
• In applications where the conductivity of the process liquid is less than 100 μS, magmeters should be allowed to soak in a full
pipe for 24 hours before operation.
Locating the sensor where the ow is upward protects the sensor from exposure to air bubbles and may offset upstream turbulence
caused by pipe conditions and other hardware.
+GF+
+GF+
+GF+
O.K.
+GF+
O.K.
+GF+
O.K.
+GF+
20 x ID
+GF+
+GF+
+GF+
O.K.
+GF+
O.K.
+GF+
O.K.
+GF+
20 x ID
Air pockets and bubbles
will travel at the top of a
horizontal pipe, so avoid
vertical installations.
Sediments and debris
that collect at the
bottom of a horizontal
pipe will interference
with the operation.
Selecting a Location
Vertical Installation
General Installation
Recommended Installation
Located the magmeter in a
"trap" to prevent air bubbles
and to keep the electrodes
wetted for best performance.
+GF+
+GF+
+GF+
O.K.
+GF+
O.K.
+GF+
O.K.
+GF+
20 x ID
+GF+
+GF+
+GF+
O.K.
+GF+
O.K.
+GF+
O.K.
+GF+
20 x ID
25.4 mm
(1.0 in.)
41 mm
(1.6 in.)
137 mm
(5.4 in.)
2552-2 models
290 mm
(11.4 in.)
2552-3 models
432 mm
(17.0 in.)
2552-2 models
276.3 mm
(10.88 in.)
2552-3 models
419 mm
(16.5 in.)
32 mm
(1.25 in.)
Acme
threads
Dimensions
Locking
Set Screw
Threaded
Ground lug
Alignment Reference hole
Process Connector Nut
1¼ in. or 1½ in.
NPT or ISO threads
316 SS Sensor Body
Signal Cable
Sensor Adjustment Hub
ACME Threaded
outer housing
316 SS Electrodes
Overview

5
Signet 2552 Metal Magmeter
+GF+
15 x I.D.5x I.D.
Reducer
+GF+
10 x I.D.5x I.D.
Inlet Outlet
Flange
+GF+
50 x I.D. 5 x I.D.
Valve/Pump
+GF+
40 x I.D.5x I.D.
2 x 90° Elbow
3 dimensions
25 x I.D.5x I.D.
2 x 90° Elbow
+GF+
20 x I.D
.5
x I.D.
90° Elbow
+GF+
If the magmeter must be mounted
in a horizontal section of pipe,
take extra precautions to prevent
air bubbles from passing over the
sensor.
Select a location with suf cient
distance of straight pipe immediately
upstream of the sensor. The
dimensions illustrated here are
intended for general guidance.
Every piping system has unique
characteristics, and requires
individual evaluation.
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  uids may require a longer conditioning period.
• The Magmeter may not operate properly in  uids where the conductivity is less than 20 µS/cm.
Grounding rings on plastic pipe
(Installed between flanges)
10 cm to 1.3 m
(4 in. to 50 in.)
10 cm to 1.3 m
(4 in. to 50 in.)
FLOW →
*Blue
Black
Brown
White
Shield
3
1
22
9900
ENTER
*See page 9 for wiring details.
Sensor Conditioning
Grounding
Horizontal Installation
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 sensor nut
directly to a local Earth ground.
 Install  uid grounding devices immediately upstream
and downstream of the Magmeter.
Connect the  uid grounds to the Earth ground
terminal on the 2552.
Use  anged grounding rings or metal electrodes on
plastic pipes, or metal clamps on metal pipes.
Fluid grounds must be in direct contact with the  uid,
and as near to the Magmeter as possible.
 Connect the SHIELD conductor to Earth ground
near the instrument.

6Signet 2552 Metal Magmeter
H Dimension
10% of
inside diameter
Wall Thickness
Hardware
Stack Height
The alignment of the electrodes in the pipe and the insertion depth of the electrodes in relation to the inside diameter of the pipe
are critical to the successful operation and calibration of the system. The brass rod that is supplied with the 2552 is used to assist
with this requirement.
The H-dimension is the distance from the TOP OF THE PIPE to the BOTTOM OF THE BRASS ROD.
The tables on pages 11-12 include the H-dimension for two of the most common pipe schedules from DN50 to DN2550
(2 in. to 102 in.). If the pipe is not represented in the tables on pages 11-12, use the procedure below to determine the H-dimension.
The goal of the procedure is to place the Magmeter electrodes 10% inside of the pipe
1. The height from the magmeter electrodes to the alignment rod is:
-2 Versions: 276.3 mm ( 10.88 in. )
-3 Versions: 419.0 mm ( 16.50 in. )
2. Subtract the wall thickness of the pipe:
- Wall Thickness: -_____ mm ( ______ in.)
3. Subtract 10% of the pipe inside diameter:
- 10% of pipe id: -_____ mm ( ______ in.)
4. The result is the H-dimension. Record the result here for reference at the installation site:
= H dimension: =_____ mm ( ______ in.)
Preparing for Installation
H-Dimension
Hardware stack height is important
The H-dimension represents the total height
available for the installation hardware.
If there is insufcient clearance to accommodate
the hardware, select a longer 2552 Magmeter or
modify the hardware to reduce the stack height.

7
Signet 2552 Metal Magmeter
3. Install the Magmeter into the pipe
a. Apply sealing tape or paste to the male threads of the process
connector nut.
b. Tighten the process connector into the pipe.
• Do not damage the locking set screw when using tools.
• The sensor is marked to identify the downstream alignment.
The arrow MUST point DOWNSTREAM.
• Hold the outer sensor housing securely while threading the
process connector nut into the tting. This will prevent the cable
from becoming twisted around the sensor while the process
connector is tightened into the pipe.
c. Loosen the set screw in the process connector nut.
d. Rotate the Acme threaded outer housing until the ow arrow is
aligned in the proper direction.
e. Secure the set screw sufciently to prevent the outer housing
from spinning.
Do not tighten the set screw yet. It may require additional adjustment.
Not supplied with the 2552 Magmeter:
• Female pipe tting (weld-on or saddle) with:
• 1¼ in. NPT or ISO 7/Rc 1¼ threads (2552-2)
• 1½ in. NPT or ISO 7/Rc 1½ threads (2552-3)
• 32 mm (1¼ in.) or 40 mm (1½ in.) ball valve (for hot tap installations)
• 32 mm (1¼ in.) or 40 mm (1½ in.) diameter drill
• 32 mm (1¼ in.) pipe nipple
• Pipe thread sealant suitable for application
• Pipe wrench
The following items are required to properly install the Magmeter:
Supplied with 2552 Magmeter:
• Ruler
• Brass alignment rod
• H-dimension value for your pipe
(See pages 6)
• Hex wrench
• 2 clamp rings
• Grounding screw
• Anti-Seize Lubricant for stainless steel
1. Determine the H-dimension for the pipe
• The tables on pages 11-12 list the H-dimension metal pipe per ANSI 36.10 and ANSI 36.19.
• Use the procedure on page 6 to determine the H-dimension for other types of pipe.
FLOW →
FLOW →
FLOW →
H
FLOW →
FLOW → FLOW →
FLOW →
Set Screw
Set Screw
Wrench
FLOW →
Wear gloves to grip the outer sensor housing.
Magmeter Installation
2. Prepare the pipe
a. Cut a 32 mm (1¼ in.) opening in the pipe.
b. Install a 32 mm (1¼ in.) for 2552-2, or 40 mm (1½ in.) for 2552-3 outlet onto the pipe.
This tting must withstand pressures up to 20 bar (300 psi).
For Hot-tap installations:
• Thread a matching pipe nipple and ball valve into the outlet.
• Use a suitable paste or sealing tape to provide a leakproof connection.
Hot- tap drilling requires special tools and skills.
This task should only be performed by qualied personnel.
For Ball Valve installations:
Position the ball 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.
Remember to tilt the magmeter to avoid air bubbles
(see General Installation, page 4).
FLOW →
FLOW →
FLOW →
H
FLOW →
FLOW →
FLOW →
FLOW →
Set Screw
Set Screw
Wrench
FLOW →
FLOW →
FLOW →
FLOW →
H
FLOW →
FLOW →
FLOW →
FLOW →
Set Screw
Set Screw
Wrench
FLOW →
FLOW →
FLOW →
FLOW →
H
FLOW →
FLOW → FLOW →
FLOW →
Set Screw
Set Screw
Wrench
FLOW →

8Signet 2552 Metal Magmeter
4. Adjust the magmeter position and insertion depth
a. Insert the brass rod through the alignment reference hole located
directly below the sensor adjustment hub.
b. IMPORTANT! Apply Anti-Seize Lubricant for stainless steel
("Permatex" brand or equivalent) to the acme threads on the housing.
Apply fresh lubricant whenever servicing and before retracting sensor.
Dry operation under high uid pressure may cause
permanent damage!
c. Adjust the height of the magmeter by turning the sensor adjustment hub
clockwise until the distance from the OUTSIDE of the pipe to the bottom
of the alignment rod is equal to the H-dimension (as recorded on pg. 6).
5. Secure the Magmeter in position
a. Secure the height adjustment by installing the two pipe
clamps above and below the sensor adjustment hub.
b. Spread the clamp apart to wrap it around the outer
housing.
c. Place one clamp immediately above and one clamp
immediately below the magmeter adjustment hub.
d. Squeeze the clamp together until it is rmly locked
around the housing.
FLOW →
FLOW →
FLOW →
H
FLOW →
FLOW → FLOW →
FLOW →
Set Screw
Set Screw
Wrench
FLOW →
6. Removal Instructions for Hot-tap Installations
• REDUCE THE PROCESS TEMPERATURE TO LESS THAN 40 °C (104 °F).
• REDUCE THE SYSTEM PRESSURE TO A SAFE LEVEL.
• WEAR SUITABLE PROTECTIVE EQUIPMENT WHEN WORKING WITH
PRESSURIZED PIPES.
a. Remove the steel clamp from the top of the assembly.
b. Turn the sensor adjustment hub counter-clockwise until the sensor is fully retracted.
(The alignment sensor hole should be at the top of the outer housing slot.)
Apply a suitable lubricant to the ACME threads to ease the retraction.
c. Close the valve after raising the magmeter to the top of the housing.
Install a LOCKOUT TAG on the closed valve to prevent accidents!
d. Remove the magmeter from the top of the valve.
e. Loosen the locking set screw on the process connector nut.
f. Use one pipe wrench to hold the valve in place while turning
the process connector nut with a second wrench.
g. Do not damage the locking set screw when using tools. UNDER PRESSURE!
HOLD VALVE IN PLACE!
Turn magmeter adapter ONLY!
CLOSE VALVE
BEFORE REMOVING MAGMETER!
DANGER!
DO NOT
OPEN
THIS VALVE
This lock/tag may
only be removed by:
Name ___________
Dept. ____________
Expected date for
completion:_________
Magmeter Installation - cont.
The distance from the
OUTSIDE of the pipe
to the bottom of the
alignment rod must be
equal to the H-dimension
FLOW →
→
FLOW →
→
→
→
FLOW
Set Screw
Hex Wrench
FLOW
FLOW
FLOW
H
CAUTION:
Overtightening the set screw may
damage the hex key.
d. Loosen the locking set screw and rotate the outer housing
to align the brass rod with the centerline if the pipe.
e. When the magmeter is adjusted for the proper height and
alignment, tighten the locking set screw rmly.
Pipe Top View
Align Magmeter with pipe ±1°

9
Signet 2552 Metal Magmeter
The 2552 outputs an open collector frequency signal that can be connected to:
• 8550-3 Flow Transmitter
• 8900 Multi-Parameter Controller
• 9900 Transmitter
DC power is provided to the 2552 Magmeter by all Signet instruments. No additional power is required.
ALWAYS connect AUX power on the 8550-3 and 9900 to provide power for the 2552 output signal.
Frequency Output Wiring
Digital (S3L) Output Wiring
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)
S3L (Red)
GND (White/Shield)
+5VDC (Black)
S3L (Red)
GND (White/Shield)
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
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)
S3L (Red)
GND (White/Shield)
Frequency
Input
1
Frequency
Input 2
OR
S3L
Input
2
White
Blue
Brown
Black
Shield
DATA
GND
SHLD
V+
Brown
White
Blue
Black
Shield
No
connection
DATA
GND
SHLD
V+
Brown
White
Blue
Black
Shield
8900 Frequency Wiring
9900 Digital (S3L)
Wiring
9900 Frequency
Wiring
9900 Digital (S3L) Wiring
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)
S3L (Red)
GND (White/Shield)
+5VDC (Black)
S3L (Red)
GND (White/Shield)
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
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)
S3L (Red)
GND (White/Shield)
Frequency
Input
1
Frequency
Input 2
OR
S3L
Input
2
White
Blue
Brown
Black
Shield
DATA
GND
SHLD
V+
Brown
White
Blue
Black
Shield
No
connection
DATA
GND
SHLD
V+
Brown
White
Blue
Black
Shield
8900 Frequency Wiring
9900 Digital (S3L)
Wiring
9900 Frequency
Wiring
9900 Digital (S3L) Wiring
Non-Signet Instrument
5-24 VDC
Sensor Ground
Frequency Out
10 KΩ
White
Blue
Brown
Black
Shield
8550-3 Flow Transmitter
White
Brown
Black
Blue
Shield
Sensr IN
(RED)
Sensr V+
(BLACK)
Sensr Gnd
(SHIELD)
If connecting the 2552 Magmeter to a ow 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 (Brown) wires.
DC power is provided to the 2552 Magmeter by all Signet instruments. No additional power is required.
ALWAYS connect AUX power on the 8900 and 9900 to provide power for the 2552 output signal.
The maximum cable length from the 2552 to the 8900 depends on the 8900 conguration.
Refer to the 8900 manual for complete information.

10 Signet 2552 Metal Magmeter
4 to 20 mA Loop Output Wiring
The 2552 Magmeter is a traditional 2-wire passive 4 to 20 mA
loop transmitter.
• External loop power (21.6 to 26.4 VDC, 22.1 mA
maximum) is required. (See Power Requirements
on pg. 2)
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 to 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 to 20 mA range of the loop device
(PLC, Datalogger, recorder, etc.).
4 to 20 mA
Loop monitor
(Maximum 300 Ω)
+
+
-
-
24 VDC ± 10%
Brown X
Blue X
White Loop - (Ground)
Black Loop + (24 VDC)
Wiring the 2552-XX-12 Magmeter with 4 to 20 mA Loop Output