GF Signet 2450 User Manual
Signet 2450 Pressure Sensor
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
*3-2450.090-1*
3-2450.090-1 Rev. K 05/13 English
English
1. Description
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 (S
ranges for optimal measurement resolution. Built-in temperature compensation provides outstanding accuracy over a wide operating
range. Versions with 1/2 in. union process connection are best suited for in-line installations.
Integral adapters (sold separately) may be used to create a compact assembly with fi eld mount versions of the 8450 Pressure Transmitter
and the 9900 Transmitter.
2. Specifi cations
General
Compatibility
Digital (S3L) models: 8450, 8900, 9900
4 to 20 mA models: PLC
Wetted materials:
• Sensor housing: PVDF
• Diaphragm: Ceramic
• Seal: FPM
Process connection:
• -3X, -7X:
where X = U, L, or H
Rear connection:
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 (S
• 4 to 20 mA models: 12 to 24 VDC ±10% regulated
Short circuit & reverse polarity protected
Digital (S
• 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 section 6.3 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 specifi cations):
-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)
3
L) models: 5 to 6.5 VDC ±10%, <1.5 mA
3
L) output:
Safety Instructions
1. Prior to installation or removal:
• Depressurize and vent system
• Drain below sensor level
2. Confi rm chemical compatibility before use.
3. Do not exceed maximum temperature/pressure specifi cations.
4. Wear safety goggles or faceshield during installation/service.
Table of Contents
1. Description
2. Specifi cations
3. Installation
4. Digital (S
5. 4 to 20 mA Wiring
6. 4 to 20 mA Span
5. Do not alter product construction.
6. Dispose of properly; DO NOT INCINERATE!
7. Ordering Information
USE THE ATTACHED ADHESIVE LABEL TO PRESERVE THE SAFETY INSTRUCTIONS!
3
L) digital output or fi eld-scaleable 4 to 20 mA output. Select from three (3) pressure
• 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)
1
/2 in. Union male thread,
3
/4 in. NPT male thread
-XL 5.2 bar (75 psig)
-XH 20.7 bar (300 psig)
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 Occupational Health and Safety.
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.
China RoHS (Go to www.gfsignet.com for details)
Dimensions
34 mm
¾ in.
NPT
19.1 mm
(0.75 in.)
(1.34 in.)
3-2450-3X, -7X
½ in.
Male
Union
81 mm
(3.18 in.)
97 mm (7.75 in.)
(8450)
Adjustment
96 mm
(3.78 in.)
3-8450, 3-9900-1
3
L) Wiring
216.1 mm (8.5 in.)
(9900-1)
3. Installation
Diaphragm
Capillary Tube
Cable gland
Reducer coupling
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
• 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 fl ow 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 fl ow. 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 fl exible hose is used to tap
into the process pipe. Air bubbles could cause reading
fl uctuation and errors.
Process Pipe
F
l
e
x
i
b
l
e
h
o
s
No Air Bubbles
Main Valve Closed
e
Bleed Valve Open
3.1 Integral Assembly Sensor Modifi cation
• Modify sensor part number 3-2450 per fi gure 1.
• Apply sealant or PTFE tape to the process connection threads per fi gure 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 fi nger tight into the process connection.
152 mm
(6 in.)
3-9900
3-8450
3-9900.396
Angle Adjustment Adapter Kit
• Install 8450 transmitter (refer to 8450 manual for wiring info) or 9900 Transmitter with
Angle Adjustment Adapter (refer to 9900 manual for information).
• The 3-8052 Integral kit includes:
• 3-9000.392-1 liquid tight connector, ½ in. NPT
• Conduit base to attach 8450.
Figure 1
3-8052
Integral mount kit
Figure 2
3.2 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 fi gure 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 fi gure 3, after
inspecting threads to ensure integrity. Do not install a sensor with damaged threads.
• Tighten the sensor 1½ turns past fi nger tight into the process connection.
Figure 3
3.3 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 fl uid temperatures will cause inaccurate reading.
2 2450 Pressure Sensor
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