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Signet Pressure

Transmitter

Pressure Cal:

0.0    psi >

ENTER

Signet 8450-1 Pressure Transmitter

• 

Max loop impedance: 

50 

Ω 

max. @ 12 V,

 

   

325 

Ω 

max. @ 18 V,

 

   

600 

Ω 

 max. @ 24 V

• 

Update rate:  100 ms

• 

Accuracy:  ±0.03 mA

Open-collector output:  Hi, Lo, Programmable:
• 

Open-collector, optically isolated, 50 mA max. sink, 30 VDC 
max. pull-up voltage

• 

Hysteresis:  User adjustable

Environmental

• 

Operating temperature:  -10  to 70°C (14 to 158°F) 

• 

Storage temperature: 

-15 to 80°C (5 to 176°F)

• 

Relative humidity: 

0 to 95%, non-condensing

• 

Maximum altitude: 

2000 m (6562 ft)

• Insulation 

category: 

II

• Pollution 

degree: 

2

Standards and Approvals

• CE, 

UL 

listed

• Immunity:  EN50082-2
• 

Emissions: 

EN55011 Class B

• 

Manufactured under ISO 9001 and ISO 14001

2. Specifi cations

General

Compatibility:  Signet 2450 Pressure Sensor
Accuracy:  ±1% of full scale
Repeatability:  ±0.5% of full scale
Enclosure:
• Rating: 

NEMA 

4X/IP65 

front

• Case: 

PBT

• 

Panel case gasket:  Neoprene

• 

Window: 

Polyurethane coated polycarbonate

• Keypad: 

Sealed 

4-key 

silicone 

rubber

• 

Weight: 

Approx. 325g (12 oz.)

Display:
• 

Alphanumeric 2 x 16 LCD

• 

Update rate:  1 second

• 

Contrast:  User selected, 5 levels

Electrical

Sensor Input:
• 

Range:  0-250 psig, 0-17 bar, 0-1700 kPa

Current output: 
• 

4 to 20 mA, isolated, fully adjustable and reversible

• 

Power:  12 to 24 VDC ±10%, regulated, 21 mA max current

CAUTION!

•    Remove power to unit before wiring 

input and output connections.

•    Follow instructions carefully to avoid 

personal injury.

Contents

1. Installation
2. Specifi 

cations

3. Electrical Connections
4. Menu Functions

SIDE VIEW

92 mm
(3.6 in.)

97 mm

(3.8 in.)

56 mm 
(2.2 in.)

41 mm 
(1.6 in.

)

Optional
Rear
Cover

Field Mount

Panel Mount

FRONT VIEW

96 mm

(3.8 in.)

96 mm
(3.8 in.)

96 mm

(3.8 in.)

quick-clips

gasket

panel

terminals

mounting

bracket

latch

Outp

ut -

Outp

ut +

Syste

m Pw

r

Loop

 -

Syste

m Pw

r

Loop

 +

2

1

4

3

Sens

r Gnd

(SHIE

LD)

Sens

r IN

(RED

)

Sensr V

+

(BLA

CK)

7

6

5

SIDE VIEW

Field Mount &

Panel Mount

Panel Mount

Installation Detail

107 mm (4.2 in.)

42 mm 

(1.7 in.)

65 mm 

(2.5 in.)

   8052

1. Installation 

ProcessPro transmitters are available in two styles: panel mount and fi eld mount.  The panel mount is supplied with the necessary 
hardware to install the transmitter.  This manual includes complete panel mounting instructions.
Field mounting requires one of two separate mounting kits.  The 3-8052 integral kit joins the sensor and instrument together into a 
single package.  The 3-8050 Universal kit enables the transmitter to be installed virtually anywhere.
Detailed instructions for integral mounting or other fi eld installation options are included with the 3-8052 Integral kit or the 3-8050 
Universal kit.

1.1 Panel 

Installation 

  1.  The panel mount transmitter is designed for installation using a 1/4 DIN Punch.  For manual panel cutout, an adhesive 

template is provided as an installation guide.  Recommended clearance on all sides between instruments is 1 inch.

  2.  Place gasket on instrument, and install in panel.
  3.  Slide mounting bracket over back of instrument until quick-clips snap into latches on side of instrument.
  4.  To remove, secure instrument temporarily with tape from front or grip from rear of instrument.  DO NOT RELEASE.
 

 

Press quick-clips outward and remove.

*3-8450.090-1*

3-8450.090-1 

 

Rev. H 3/06 

 

English

English

Summary of Contents for 8450-1

Page 1: ...VIEW 92 mm 3 6 in 97 mm 3 8 in 56 mm 2 2 in 41 mm 1 6 in Optional Rear Cover Field Mount Panel Mount FRONT VIEW 96 mm 3 8 in 96 mm 3 8 in 96 mm 3 8 in quick clips gasket panel terminals mounting bracket latch Output Output System Pwr Loo p System Pwr Loo p 2 1 4 3 Sen sr Gnd SHIELD Sen sr IN RED Sen sr V BLACK 7 6 5 SIDE VIEW Field Mount Panel Mount Panel Mount Installation Detail 107 mm 4 2 in 42...

Page 2: ...help prevent electrical noise and mechanical damage Seal cable entry points to prevent moisture damage Only one wire should be inserted into a terminal Splice double wires outside the terminal The cable length from the sensor to the transmitter must not exceed 400 ft 122 m For best performance ground the sensor SHIELD wire to a local earth ground at a point near the sensor Experiment with connecti...

Page 3: ...Power Supply 12 24 VDC PLC or Recorder Channel 1 4 20 mA in Channel 2 4 20 mA in Transmitter 1 Terminals System Pwr Loop System Pwr Loop Transmitter 2 Terminals PLC Terminals Loop Input 4 20 mA Transmitter Terminals Power Supply 12 24 VDC Power Supply 12 24 VDC System Pwr Loop System Pwr Loop 4 3 2 1 System Pwr Loop System Pwr Loop 4 3 2 1 System Pwr Loop System Pwr Loop 4 3 2 1 4 3 2 1 3 2 System...

Page 4: ...r output can be used as a switch that responds when the process value moves above or below a setpoint or it can be used to generate a pulsing signal with a rate proportional to the process value Low Output triggers when process variable is less than the setpoint The output will relax when the process variable moves above the setpoint plus the hysteresis value High Output triggers when process vari...

Page 5: ...cedure Step 1 Press and hold ENTER key 2 seconds to select the CALIBRATE menu 5 seconds to select the OPTIONS menu Step 2 The Key Code is UP UP UP DOWN keys in sequence After entering the Key Code the display will show the first item in the selected menu Step 3 Scroll menu with UP or DOWN arrow keys Step 4 Press RIGHT ARROW key to select menu item to be edited The first display element will begin fla...

Page 6: ...alibrate menu Check the 2450 Sensor instructions for the range capability of your sensor Be sure to modify this setting if you change the Pressure Units Select the mode of operation for the Open Collector output OFF LOW or HIGH The Open Collector Output will be activated when the pressure reaches this value Be sure to modify this setting if you change the Pressure Units The Open Collector Output w...

Page 7: ...ms where the measurement is very stable Select LOW or HIGH averaging if your process experiences frequent or extreme fluctuations in pressure Active HIGH This setting is used to turn a device pump valve ON at the setpoint Active LOW This setting is used to turn a device OFF at the setpoint Adjust the minimum and maximum current output The display value represents the precise current output Adjustme...

Page 8: ...e El Monte CA 91731 2882 U S A Tel 626 571 2770 Fax 626 573 2057 For Worldwide Sales and Service visit our website www gfsignet com Or call in the U S 800 854 4090 3 8450 090 1 Rev H 3 06 English George Fischer Signet Inc 2001 Printed in U S A on recycled paper Ordering Information Mfr Part No Code Description 3 8450 1 159 000 041 Presure transmitter Field mount 3 8450 1P 159 000 042 Presure trans...

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