GF SIGNET 8450-2 User manual

page 1 of 8‡ SIGNET 8450-2 Pressure Transmitter
Pressure
Pressure Cal:
0.0 psi >
Relay 1 Relay 2
ENTER
‡ SIGNET 8450-2 Pressure Transmitter ENGLISH
• 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
Relay outputs (2 sets):
• Mechanical SPDT contacts: programmable: Hi, Lo
• Maximum voltage rating: 5 A 30 VDC, 5 A 250 VAC
resistive load
• 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
Stan ar s an Approvals
• CSA, CE, UL listed
• Immunity: EN50082-2
• Emissions: EN55011
• Safety: EN61010
• Manufactured under ISO 9001 and ISO 14001
2. Specifications
General
Compatibility: +GF+ 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, 220 mA max current
3-8450.090-2
C-1/01 English
CAUTION!
• Remove power to unit before wiring
input and output connections.
• Follow instructions carefully to avoid
personal injury.
Contents
1. Installation
2. Specifications
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.)
107 mm
(4.2 in.)
96 mm
(3.8 in.)
quick-clips
gasket panel
terminals mounting
bracket
latch
Output -
Output +
System Pwr
Loop -
System Pwr
Loop +
2
14
3
Sensr Gn
(SHIELD)
Sensr IN
(RED)
Sensr V+
(BLACK)
7
6
5
SIDE VIEW
Field Mount &
Panel Mount Panel Mount
Installation Detail
1. Installation
ProcessPro transmitters are available in two styles: panel mount and field 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 field 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.

page 2 of 8 ‡ SIGNET 8450-2 Pressure Transmitter
2
1
3. Electrical Connections
Caution: Failure to fully open terminal jaws before removing wire may permanently damage instrument.
Wiring Procedure
1. Remove 0.5 - 0.625 in. (13-16 mm) of insulation from wire end.
2. Press the orange terminal lever downward with a small screwdriver to open terminal jaws.
3. Insert exposed (non-insulated) wire end in terminal hole until it bottoms out.
4. Release orange terminal lever to secure wire in place. Gently pull on each wire to ensure a good connection.
Wiring Removal Procedure
1. Press the orange terminal lever downward with a small screwdriver to open terminal jaws.
2. When fully open, remove wire from terminal.
System Pwr
Loop -
System Pwr
Loop +
AUX
Power -
AUX
Power +
4
3
2
1
Sensr Gn
(SHIELD)
Sensr IN
(RED)
Sensr V+
(BLACK)
13
12
11
Relay 2
(NO)
Relay 2
(COM)
Relay 2
(NC)
Relay 1
(NO)
Relay 1
(COM)
Relay 1
(NC)
10
9
8
7
6
5
Terminals 5-10: Relay Outputs
Two sets mechanical SPDT contacts, programmable
(see CALIBRATE menu) as:
• High or Low setpoint with adjustable hysteresis
• Proportional pulse output
• May be disabled (Off) if not used.
Terminals 3 an 4: Loop Power
12-24 VDC ±10% system power
and current loop output.
Max. loop impedance:
50 Ω max. 12 V
325 Ω max. 18 V
600 Ω max. 24 V Terminals 11-13: Digital sensor input
See next page for more information.
Terminals 1 an 2: AUXILIARY power
Provides power for relay operation.

page 3 of 8‡ SIGNET 8450-2 Pressure Transmitter
Stand-alone application, no current loop used
Transmitter
4
3
2
1
Sys. Pwr.
Loop -
Sys. Pwr.
Loop +
AUX
Power -
AUX
Power +
Power Supply
DC 12 - 24 V
Power
Supply
Power
Supply
Connection to a PLC with built-in power supply
PLC
Power Supply
Ground
Power
Supply
Loop Input
-20 mA
Loop Input
-20 mA
Internal PLC
Connection
Connection to a PLC/Recorder, separate supply
PLC or Recorder
Loop Input
-20 mA in
Loop Input
-20 mA in
DC 12 - 24 V
Power
Supply
Power
Supply
Example: Two transmitters connected to PLC/Recorder
with separate power supply
Transmitter 2
4
3
2
1
DC 12 - 24 V
Power
Supply
Power
Supply
Transmitter 1
4
3
2
1
Transmitter
4
3
2
1
Sys. Pwr.
Loop -
Sys. Pwr.
Loop +
AUX
Power -
AUX
Power +
Transmitter
4
3
2
1
Sys. Pwr.
Loop -
Sys. Pwr.
Loop +
AUX
Power -
AUX
Power +
Sys. Pwr.
Loop -
Sys. Pwr.
Loop +
AUX
Power -
AUX
Power +
Sys. Pwr.
Loop -
Sys. Pwr.
Loop +
AUX
Power -
AUX
Power +
PLC or Recorder
Channel 1
-20 mA in
Channel 1
-20 mA in
Channel 2
-20 mA in
Channel 2
-20 mA in
Terminals
Terminals
Terminals Terminals
Note: AUXILIARY power is required for all systems that
use the relay outputs.
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
3.1 System Power/Loop Connections
13
12
11
Silver (Sensr Gnd)
Red (Sensr IN)
Black (Sensr V+)
+GF+ SIGNET 2450
Pressure Sensors
Terminals
Transmitter
≤ 400 ft. (122 m)
3.2 Sensor Input Connections
Wiring Tips:
• Do not route sensor cable in conduit containing AC power wiring. Electrical noise may interfere with sensor signal.
• Routing sensor cable in grounded metal conduit will 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 connecting the sensor shield wire to different local ground points to identify best signal quality.)

page 4 of 8 ‡ SIGNET 8450-2 Pressure Transmitter
Pressure
Pressure Cal:
0.0 psi >
Relay 1 Relay 2
ENTER
Hysteresis
Time
Low Setpoint
Process
Hysteresis
Output active
Output inactive
Time
High Setpoint
Process
VIEW menu
• During normal operation, the ProcessPro displays the VIEW menu.
• When using the CALIBRATE or OPTIONS menus, the ProcessPro will return to the VIEW menu if no
activity occurs for 10 minutes.
• To select the item you want displayed, press the UP or DOWN arrow keys. The items will scroll in a
continuous loop.
• Changing the display selection does not interrupt system operations.
• No keycode is necessary to change display selection.
• Output settings cannot be edited from the VIEW menu.
3.3 Relay Output
The relay output can be used as a switch that responds when the
process value moves above or below a setpoint.
•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 variable is greater than the
setpoint. The output will relax when the process variable moves
below the setpoint plus the hysteresis value.
•Off
The relays may be disabled if not being used.
Monitor the pressure input from the sensor.
This is the permanent display.
Monitor the 4-20 mA Loop output.
Monitor date for scheduled maintenance or date of last calibration.
View Menu
Display Description
Pressure:
60 psi
Loop Output:
12.00 mA
Last Cal
06-30-01
The isplays below are temporary. The permanent isplay will return after 10 minutes

page 5 of 8‡ SIGNET 8450-2 Pressure Transmitter
Notes on Steps 5 an 6:
• All output functions remain active during editing.
• Only the flashing element can be edited.
• RIGHT ARROW key advances the flashing element in a continuous loop.
• Edited value is effective immediately after pressing ENTER key.
• If no key is pressed for 10 minutes unit will restore the last saved value and return to step 3.
• Step 6 (pressing ENTER key) always returns you to Step 3.
• Repeat steps 3-6 until all editing is completed.
Notes on Step 2:
If no key is pressed for 5 minutes while display is showing "Enter
Key Code", the display will return to the VIEW menu.
Notes on Steps 3 an 4:
• Refer to pages 6 and 7 for complete listing of menu items and their use.
• From the Step 3 display, pressing the UP and DOWN keys simultaneously will
return the display to the VIEW menu.
• If no key is pressed for 10 minutes, display will also return to the VIEW menu.
ProcessPro E iting Proce ure:
Step 1. Press an hol ENTER key:
• 2 seconds to select the CALIBRATE menu
• 5 seconds to select the OPTIONS menu.
Step 2. The Key Co e 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 e ite .
• The first display element will begin flashing.
Step 5. Press UP or DOWN keys to e it the flashing element.
• RIGHT ARROW key advances the flashing element.
Step 6. Press ENTER key to save the new setting an return to Step 3.
OPTIONS
CALIBRATE
VIEW
2s 5s
Press &
hold for
access:
ENTER
Step 5
Step 6
Notes on Step 1:
• The View Menu is normally displayed.
• The CALIBRATE and OPTIONS menus require a KEY CODE.
Step 4
First item in
CALIBRATE menu
Step 3
Step 3: Finishe E iting?
Press the UP and DOWN keys simultaneously after
saving the last setting to return to normal operation.
Press the UP and DOWN keys simultaneously
while any element is flashing. This will recall the
last saved value of the item being edited and
return you to Step 3.
Step 5: Ma e an Error?
CALIBRATE: ----
Enter Key Code
CALIBRATE: *---
Enter Key Code
CALIBRATE: **--
Enter Key Code
CALIBRATE: ***-
Enter Key Code
psi >
Pressure Units:
Relay1 Setpnt:
10.00 psi
Relay1 Setpnt:
00.00 psi
ENTER
Relay1 Setpnt:
0
0 .00 psi
Relay1 Setpnt:
09.00 psi
Relay1 Setpnt:
Saving
Relay1 Setpnt:
09.00 psi >
10.00 psi >
Relay1 Setpnt:
psi >
Pressure Units:

page 6 of 8 ‡ SIGNET 8450-2 Pressure Transmitter
Pressure Units:
psi >
Set:
Pressure >
Loop 1 Range: psi
0.0 →100.0 >
Relay 1 Mode
Low >
Relay 1 Setpnt:
10.0 psi >
Relay 1 Hys:
5>
Last Cal
06-30-01 >
Select Pressure units for both input channels: psi, bar or kPa.
Provides a maximum 5 psi offset to match 8450 to external reference.
Enter “-999” to restore the original Factory calibration value.
Changes to this setting will become effective when the display exits the Calibrate 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 relay:
OFF, LOW or HIGH.
The relay will be activated when the pressure reaches this value. Be sure to modify
this setting if you change the Pressure Units.
The relay will be deactivated at setpoint ± Hysteresis (depending on High or Low
selection).
Use this “note pad” to record important dates, such as annual recertification or
scheduled maintenance.
Calibrate Menu
Display
(Factory settings shown) Description

page 7 of 8‡ SIGNET 8450-2 Pressure Transmitter
Contrast:
3>
Decimal
***.* >
Averaging
Off >
Loop Adjust:
4.00 mA >
Loop Adjust:
20.00 mA >
Test Loop:
>
Test Relay 1: >
Test Relay 2: >
Adjust the LCD contrast for best viewing. A setting of 1 is lower contrast, 5 is higher.
In general, select lower contrast if the display is in warmer ambient surroundings.
Set the decimal to the best resolution for your application. The display will automatically
scale down to this restriction. Select ****., ***.*, **.** or *.***.
OFF provides the most instantaneous response to changes in pressure. It is the preferred
option in systems where the measurement is very stable.
Select LOW or HIGH averaging if your process experiences frequent or extreme
fluctuations in pressure.
Adjust the minimum and maximum current output. The display value represents the
precise current output. Adjustment limits:
• 3.80 mA < 4.00 mA > 5.00 mA
• 19.00 mA < 20.00 mA > 21.00 mA
Use this setting to match the system output to any external device.
Press UP and DOWN keys to manually order any output current value from 3.6 mA to
21.00 mA to test the output loop.
Press UP and DOWN keys to manually toggle the relay state.
Press UP and DOWN keys to manually toggle the relay state.
Options Menu
Display
(Factory settings shown) Description

page 8 of 8 ‡ SIGNET 8450-2 Pressure Transmitter
‡ SIGNET
Signet Scientific Company, 3401 Aerojet Avenue, El Monte, CA 91731-2882 U.S.A. • Tel. [phone] • Fax [phone]
For Worl wi e Sales an Service, visit our website: gfsignet.com • Or call (in the U.S.): [phone]
GEORGE FISCHER ‡ Piping Systems
3-8450.090-2/(C-1/01) English © Scientific Company 1999 Printed in U.S.A. on recycled paper
"Check Sensor?"
"Too much error
CHECK SENSOR"
"Reset to Factory
Calibration"
Relay is always activate
"SETUP READ ERROR
Press Any Key"
• Sensor not wired properly.
• Sensor connected to 8450 while power
is on.
• Defective sensor.
The value entered in Set Pressure field is
greater than 5 psi deviation from sensor
input. (The 8450 allows a maximum of 5 psi
calibration offset.)
Value in SET PRESSURE field is -999.
Hysteresis value too large.
Memory fault occurred.
• Correct sensor wiring.
• Recycle power with all sensors connected.
• Replace defective sensor.
• Confirm calibration values.
• Remove sensor from installation, check 8450
reading (should be zero). If necessary, Set
Pressure to zero, reinstall sensor, then
recalibrate.
Entering "-999" in this field will remove all user
calibration input and restore the factory values.
Reset hysteresis value in Calibrate menu.
• Press any key to reload factory presets.
• Reprogram all setpoints.
• If this message appears again, replace the 8450.
Pro uct Mo ifications
In August 2000 the operation of the 8450 Pressure Transmitter was modified to allow control of the decimal in the display via the
OPTIONS menu.
Products manufactured prior to August 2000 are limited to one fixed decimal place (XXX.X).
Display Con ition Suggeste SolutionsPossible Causes
Troubleshooting