Georg Fischer Signet 2450 User manual

Signet 2450 Pressure Sensor
The 2450 Pressure Sensor has a one-piece injection molded PVDF body and
ceramic diaphragm for superior compatibility in corrosive liquids. These sensors are
available with Digital (S3L) output or field-scaleable 4 to 20 mA output. Select from
three (3) pressure ranges for optimal measurement resolution. Built-in temperature
compensation provides outstanding accuracy over a wide operating range. Versions
with 1/2in. union process connection are best suited for in-line installations.
Integral adapters (sold separately) may be used to create a compact assembly with field
mount versions of the 9900 Transmitter.
3-2450.090-1 Rev. 13 03/18
*3-2450.090-1*
3-2450-3X, -7X
34 mm
(1.34 in.)
¾ in.
NPT
81 mm
(3.18 in.)
1” G thread,
suitable for
GF ½” (d20) unions
19.1 mm
(0.75 in.)
3-8450, 3-9900-1
97 mm (7.75 in.)
(8450)
96 mm
(3.78 in.)
216.1 mm (8.5 in.)
(9900-1)
English
Description
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Product Manual
Dimensions

1. Prior to installation or removal:
• Depressurize and vent system
• Drain below sensor level
2. Confirm chemical compatibility before use.
3. Do not exceed maximum temperature/pressure specifications.
4. Wear safety goggles or faceshield during installation/service.
5. Do not alter product construction.
6. Dispose of properly; DO NOT INCINERATE!
USE THE ATTACHED ADHESIVE LABEL TO PRESERVE
THE SAFETY INSTRUCTIONS!
Caution / Warning / Danger
Indicates a potential hazard. Failure to follow all warnings
may lead to equipment damage, injury, or death
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.
Hand Tighten Only
Overtightening may permanently damage product threads
and lead to failure of the retaining nut.
Do Not Use Tools
Use of tool(s) may damage product beyond repair and
potentially void product warranty.
Refer to your local Georg Fischer Sales office 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 office 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
Warranty Information
Product Registration
Safety Information
General
Compatibility
Digital (S3L) models .......... 8900, 9900, 9950
4 to 20 mA models ............ PLC
Wetted materials
Sensor housing................. PVDF
Diaphragm ........................ Ceramic
Seal................................... FKM
Process connection
-3X, -7X............................. 1/2 in. Union male thread,
where X = U, L, or H
Rear connection ................... 3/4 in. NPT male thread
Cable type ............................ 3 cond + shield, 22 AWG
Standard cable length
-3X, -7X............................. 4.6 m (15 ft)
Sensor Accuracy................... ±1% of full scale @ 25 °C
Thermal sensitivity shift ........ ±0.03% of full scale per °C
Shipping weight .................... 0.3 kg (0.65 lb.)
Electrical
Power Requirements
Digital (S3L) models .......... 5 to 6.5 VDC ±10%, <1.5 mA
4 to 20 mA models ............ 12 to 24 VDC ±10% regulated
Short circuit & reverse polarity protected
Digital (S3L) output
Type .................................. Serial ASCII, TTL level 9600 bps
Accuracy ........................... ±1% of full scale @ 25 °C
Repeatability ..................... ±0.5% of full scale
Resolution......................... 0.01 psi (0.001 psi for -XU)
Update rate ....................... <100 ms
4 to 20 mA output
Accuracy ........................... ±32 μA
Repeatability ..................... ±0.5% of full scale
Resolution......................... <5 μA
Span.................................. Field-scaleable
(see page 6 for factory settings)
Max loop impedance......... 100 Ω@ 12 V
325 Ω@ 18 V
600 Ω@ 24 V
Update rate ....................... <100 ms
Operating range (Max. pressure for accuracy specifications):
-XU.................................... 0 to 0.7 bar (0 to 10 psig)
-XL .................................... 0 to 3.4 bar (0 to 50 psig)
-XH.................................... 0 to 17.2 bar (0 to 250 psig)
Vacuum range
-XU ...........-0.1 to 0.7 bar
(-1.5 to 10 psi)
-XL ............-0.41 to 3.4 bar
(-6 to 50 psi)
-XH ...........-0.96 to 17.2 bar
(-14.6 to 250 psi)
Proof pressure
(Max. pressure without damage)
-XU ...........1.4 bar
(20 psig)
-XL ............5.2 bar
(75 psig)
-XH ...........20.7 bar
(300 psig)
0
-40 -20 0 20 40 60 80 100 120
°F
°C -40 -4 32 68 104 140 176 212 248
(bar)
(psi)
1.7
3.4
5.2
6.9
8.6
10.3
25
50
75
100
125
150
12.1
175
13.8
200
225 15.5
275 19.0
-XH
-XL
-XU
Specifications
22450 Pressure Sensor

Specifications Installation
Diaphragm
Capillary Tube
Cable gland
Reducer coupling
Signet 2450 Pressure Sensors are gauge pressure sensors.
Gauge pressure sensors measure the difference in pressure
between the process on one side of a diaphragm and the
atmospheric pressure on the opposite side of the diaphragm.
A tiny capillary tube inside the sensor body is used to ensure
that the back of the diaphragm remains at atmospheric
pressure. If moisture is allowed to propagate down this tube to
the rear of the diaphragm, the sensor may be damaged.
Important Installation Recommendations
• The ceramic diaphragm is subject to breakage by over-pressure conditions or mechanical contact.
HANDLE WITH CARE. Do not attempt to test the sensor by pressing on the diaphragm.
• Short duration pressure pulses or shocks, called ‘‘water hammer,’’ are generated by a rapid change in flow rate caused by the
operation of system components such as compressors, pumps, pistons and valves. Water hammer can reach pressure levels
far exceeding the over pressure rating of our pressure sensors and damage the ceramic diaphragm.
• A pressure snubber is a device for slowing the rate of change of system flow. Installation of a properly sized snubber at or
near the input of a pressure sensor will protect it from water hammer damage. Snubbers are available through plumbing and
instrumentation dealers.
• When threading the sensor into a piping system, any backpressure can damage the ceramic diaphragm.
Open nearby valves to relieve any backpressure while threading the sensor into the pipe.
• If the nearby valves cannot be open while threading the
sensor into the pipe, a bleed valve can be installed to
avoid overpressure.
• Make sure there are no air bubbles in the pipe,
particularly if a long and flexible hose is used to tap
into the process pipe. Air bubbles could cause reading
fluctuation and errors.
Main Valve Closed
Bleed Valve Open
Process Pipe
No Air Bubbles
F
l
e
x
i
b
l
e
h
o
s
e
Environmental
Relative humidity .................. 0 to 95%
(Non-condensing)
Storage temperature............. -20 °C to 100 °C (-4 °F to 212 °F)
Operating temperature ......... -15 °C to 85 °C (5 °F to 185 °F)
Standards and Approvals
CE
RoHS Compliant
Manufactured under ISO 9001 for Quality, ISO 14001 for
Environmental Management and OHSAS 18001 for Occupa-
tional Health and Safety.
China RoHS (Go to www.gfsignet.com for details)
Declaration of Conformity according to FCC Part 15:
This device complies with Part 15 of the FCC rules.
Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and,
(2) This device must accept any interference received,
including interference that may cause undesired operation.
3
2450 Pressure Sensor

Tank Installation Options
Submersible:
• Refer to the GF product 3-2250-XX for submersible
installations.
Side Tank Mount:
• Install GF ball valve to allow isolation of the sensor for
maintenance.
• It is recommended that a 3-8052-1 kit be used to protect the
back end of the sensor.
WARNING: Exposing the sensor body to elevated
temperatures that are different than the tank fluid
temperatures will cause inaccurate reading.
The 2450-3X and the 2450-7X sensors have a union-style
process connection. To assemble:
1. Slide union nut onto pipe or flexible tubing.
2. Install end connectors.
3. Hand-tighten union nut to secure.
Refer to Signet Measurement and Instrumentation Product
Catalogue for ordering information.
Pipe
End Connector
Union Nut
O-Ring
Sensor
not supplied
Cable gland or
conduit connection
1/2 Inch Male Union Installation
4-20
mA FREQ/
DATA
WHT WHT
BLU BLK
N/C RED
SHIELD
SENSOR
INPUT
SHIELD
–
+FREQ/
DATA
3-8052-1
Integral junction box,
3/4 in. NPT
In-line Remote Assembly
The optional 3-8052-1 Integral Junction box with ¾ in. process
connection offers a convenient terminal point to extend the 2450
cable over a distance greater than 4.6 m (15 ft).
• The kit includes:
• Conduit base and cap with junction terminals
• 3-9000.392-1 liquid tight connector, ½ in. NPT
To extend the wires longer than 4.6 m (15 ft):
• Modify sensor 3-2450 as described in figure 1.
• Terminate the three wires to the terminal board located in the
cap assembly.
• Add customer supplied wire to extend the cable.
• Terminate to the transmitter or the 4 to 20 mA input device.
• Apply sealant or PTFE tape to the process connection
threads per figure 3, after inspecting threads to ensure
integrity. Do not install a sensor with damaged threads.
• Tighten the sensor 1½ turns past finger tight into the
process connection.
Figure 3
Installation Installation
Integral Assembly Sensor Modification
• Modify sensor part number 3-2450 per figure 1.
• Apply sealant or PTFE tape to the process connection
threads per figure 2, after inspecting threads to ensure
integrity. Do not install a sensor with damaged threads.
• Thread the sensor into the 3-8052 mounting kit.
• Tighten the sensor 1½ turns past finger tight into the
process connection.
• Install 9900 transmitter (refer to 9900 manual for wiring info)
with Angle Adjustment Adapter.
• The 3-8052 Integral kit includes:
• 3-9000.392-1 liquid tight connector, ½ in. NPT
• Conduit base to attach 9900.
152 mm
(6 in.)
Figure 1 Figure 2
3-9900
3-8052
Integral mount kit
3-9900.396
Angle Adjustment Adapter Kit
42450 Pressure Sensor

3-8052-1
4-20
mA FREQ/
DATA
WHT WHT
BLU BLK
N/C RED
SHIELD
SENSOR
INPUT
SHIELD
–
+FREQ/
DATA
3-8052
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
+
-
+
-
DATA
GND
SHLD
V+
Loop
+V
FREQ
+V
FREQ
DATA
GND
Loop
CH2 CH1
+V
FREQ
DATA
GND
DC POWER
X
White
Black
Red
Black
Red
Shield
White
Optional
Earth ground
3-9900
S3L connector
3-8900
I/O Module Connector
Black
Red
White
S3L connector
Shield
3-9950
No connection
Black
Red
Shield
White
+
-
+
-
3-8052
3-8050.521
4 to 20 mA
loop monitor
Power Supply
DC 12 - 24 V
Black (Loop +)
Red
White (Loop - )
Shield
Optional
Earth Ground
Loop Input
Loop Input
• Connect the 2450 cable directly to a loop device as shown.
Digital (S3L) wiring
• All models of the 2450 provide Digital (S3L) output when powered with 5 VDC.
• Connecting the SHIELD to a direct earth ground may reduce electrical noise interference.
• The maximum Digital (S3L) cable length is dependent upon the instrument to which the sensor
is connected.
Consult the instrument manual for wiring details.
• Connect the 2450
cable directly to Digital
(S3L) I/O terminals.
• When the 2450 includes a
junction box, connect the 2450
terminals to any Digital (S3L)
I/O port as shown.
• When the 2450 includes a junction box, connect the 2450
terminals to the loop device as shown.
4 to 20 mA Loop Wiring
• The 2450-7X models provide a 4 to 20 mA loop output when powered with 24 VDC.
• Connecting the SHIELD to a direct Earth ground may reduce electrical noise interference.
• Red wire is not used, do not remove the heat shrink. See page 6, 4 to 20 mA Span Adjustment.
Current Loop With No Junction Box Current Loop With Junction Box
3-8052-1
+
-
4-20
mA FREQ/
DATA
WHT WHT
BLU BLK
N/C RED
SHIELD
SENSOR
INPUT
SHIELD
–
+FREQ/
DATA
+
-
White
Black
Power Supply
DC 12 - 24 V
Loop Input
Loop Input
Wiring
5
2450 Pressure Sensor

To adjust the 4 mA endpoint in the field:
• Carefully remove the heat shrink tube that is protecting the red wire.
• Expose the sensor to the pressure desired to correspond with 4 mA (any pressure in the operating range).
• With power applied as described on page 5, connect the RED wire to the WHITE wire for 15 seconds.
(After about 10 seconds the output will drop to 3.6 mA and remain there until the RED wire is disconnected.)
• Disconnect the RED wire from the WHITE wire; the 4 mA endpoint has been adjusted.
NOTE: The output will act as a switch if the 4 and 20 mA endpoints are set very near to the same value.
To adjust the 20 mA endpoint in the field:
• Expose the sensor to the pressure desired to correspond with 20 mA (any pressure in the operating range).
• With power applied as described on page 5, connect the RED wire to the BLACK wire for 15 seconds.
(After about 10 seconds the output will rise to 22 mA and remain there until the RED wire is disconnected.)
• Disconnect the RED wire from the BLACK wire; the 20 mA endpoint has been adjusted.
NOTE: The output will act as a switch if the 4 and 20 mA endpoints are set very near to the same value.
Minimum span is ±2% of maximum range.
• After adjusting the 4 to 20 mA span, protect the red wire by installing the provided wire nut.
• For easier re-spanning use the Signet 0252 Configuration Tool.
To restore factory span:
• Disconnect power to the sensor. Wait 10 seconds to allow circuit to discharge.
• Connect the RED wire to the WHITE wire.
• Apply power as described on page 5, but with the RED wire connected to the WHITE wire for 15 seconds.
(After about 10 seconds the output will drop to 3.6 mA and remain there until the RED wire is disconnected.)
• Disconnect the RED wire from the WHITE wire; factory settings have been restored.
• Replace cap on RED wire.
Mfr. Part No. Factory Span
3-2450-7U 4 to 20 mA = 0 to 10 psig
3-2450-7L 4 to 20 mA = 0 to 50 psig
3-2450-7H 4 to 20 mA = 0 to 250 psig
+
-
+
-
3-8052
3-8050.521
4 to 20 mA
loop monitor
Power Supply
DC 12 - 24 V
Black (Loop +)
Red
White (Loop - )
Shield
Optional
Earth Ground
Loop Input
Loop Input
4 to 20 mA Span Adjustment
WARNING!
Not protecting the red wire may cause the 4 to 20 mA
span to be reset.
Wire Nut
The 4 to 20 mA endpoint values are independent of one another and may be adjusted in the field. For example, to reduce the 20
mA endpoint value from the maximum full scale limit set at the factory, but to allow the 4 mA endpoint to remain at 0 psig, perform
only the steps listed below.
NOTE: The RED wire, which is not connected during normal 4 to 20 mA operation, assumes an important role in the following
procedures.
62450 Pressure Sensor

Notes
7
2450 Pressure Sensor

Georg Fischer Signet LLC, 3401 Aero Jet 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]
For the most up-to-date information, please refer to our website at www.gfsignet.com
3-2450.090-1 Rev. 13 03/18 English © Georg Fischer Signet LLC 2018
Mfr. Part No. Code Description
3-2450-3U 159 000 683 10 psig, Digital (S3L), 1/2in. Male Union, 15 ft Cable
3-2450-7U 159 000 906 10 psig, 4 to 20 mA, 1/2in. Male Union, 15 ft Cable
3-2450-3L 159 000 682 50 psig, Digital (S3L), 1/2in. Male Union, 15 ft Cable
3-2450-7L 159 000 908 50 psig, 4 to 20 mA, 1/2in. Male Union, 15 ft Cable
3-2450-3H 159 000 681 250 psig, Digital (S3L), 1/2in. Male Union, 15 ft Cable
3-2450-7H 159 000 910 250 psig, 4 to 20 mA, 1/2in. Male Union, 15 ft Cable
3-8050-1 159 000 753 Universal Mount Junction Box
3-8052-1 159 000 755 ¾ in. NPT mount junction box
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)
3-9900.396 159 001 701 Angle Adjustment Adapter Kit
5523-0322 159 000 761 Cable, 3 conductor + shield, 22 AWG, black/red/white/shield
3-0252 159 001 808 Configuration Tool
Ordering Information