Georg Fischer 8250 Operating Manual

Signet 8250-2 Level Transmitter

)

3-8250.090-2

3-8250.090-2 Rev. E 11/05 English

English

CAUTION!

• Remove power to unit before wiring
input and output connections.

• Follow instructions carefully to avoid
personal injury.

Contents

1. Description

2. Specifi cations

3. Panel installation

4. Electrical Connections

7. Editing procedure

8. Calibrate menu

9. Options menu

10. Troubleshooting

+10.00 ft

Signet Level
Transmitter

Relay 1

Level

Relay 2

ENTER

5. System confi guration

6. View menu

1. Description

• 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 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.

2. Specifi cations

Dimensions

82 mm
(3.23 in.)

Optional
Rear
Cover

)

(3.8 in.)

56 mm
(2.2 in.)

97 mm

41 mm
(1.6 in.

Panel Mount with

NEMA 4X rear cover

92 mm
(3.6 in.

96 mm

(3.8 in.)

FRONT VIEW

Field &

Panel Mount

96 mm
(3.8 in.)

107 mm

(4.2 in.)

SIDE VIEW

Field Mount with
8052 Integral kit

96 mm

(3.8 in.)

106 mm
(4.18 in.)

SIDE VIEW SIDE VIEW

Field Mount with

8050 Universal kit

General

Compatible Sensors: Signet 2450 Pressure sensor
Enclosure: NEMA 4X/IP65 front
Materials:

• Case: PBT

• Panel case gasket: Neoprene

• Window: Polyurethane-coated polycarbonate

• Keypad: Silicone rubber

Weight: Approx. 325 g (12 oz.)

Display:

• Alphanumeric 2 x 16 LCD

• Sealed 4-button keypad

• Display update rate: 1 second

• Contrast: User selected, 5 levels

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)

Electrical

Power supply: 12-24 VDC ±10% regulated, 250 mA max current
Sensor power: 5 VDC ±1% @ 25ºC, regulated
2-wire system: 1.5 mA maximum current
4-wire system: 20 mA maximum current

Current output:

• 4 to 20 mA, isolated, fully adjustable and reversible

• Max loop impedance: 50 Ω max. @ 12 V
325 Ω max. @ 18 V
600 Ω max. @ 24 V

• Update rate: 300 ms

• Output accuracy: ±0.03 mA
Relay outputs:
* 2 sets mechanical SPDT contacts standard with all units.

• Software supports 2 additional relays via optional external

relay module

• Maximum voltage rating:
5 A @ 30 VDC, or 5 A @ 250 VAC, resistive load

• Programmable for High or Low setpoint or for Window range,

with adjustable hysteresis

• May be disabled if not used

• Time delay: programmable from 0 to 6400 s

Standards and Approvals:

• CSA, CE, UL listed

• Immunity: EN50082-2

• Emissions: EN55011

• Safety: EN61010

• Manufactured under ISO 9001 and ISO 14001

1Signet 8250-2 Level Transmitter

l

3. 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.
The cutout must be 92 mm x 92 mm. Recommended
clearance on all sides between instruments is 25 mm/1 in.

2. Slide the instrument into the cutout from the front of the
panel.

3. Slide the 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.

4. Electrical Connections

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 wire into terminal 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.

Terminals 3 and 4: Loop Power

12-24 VDC ±10% system power and current loop output.
Max. loop impedance:

50Ω max. @ 12 V
325Ω max. @ 18 V
600Ω max. @ 24 V

gasket

latch

pane

Output -

4

System Pwr
Loop -

2

System Pwr
Loop +

1

Output +

3

Panel Mount
Installation Detail

Caution: Fully open terminal jaws

before removing wire to avoid
damage to connector.

terminals

Sensr Gnd
(SHIELD)

7

Sensr IN
(RED)

6

Sensr V+
(BLACK)

5

quick-clips

mounting

bracket

2

1

System Power

4

Loop -

System Power

3

Loop +

AUX

2

Power -

AUX

1

Power +

Terminals 1 and 2: AUXILIARY power

Required for all systems that include relay
operation.

10

9

8

7

6

5

Relay 2
(NO)

Relay 2
(COM)

Relay 2
(NC)

Relay 1
(NO)

Relay 1
(COM)

Relay 1
(NC)

Terminals 11-13: Digital (S

The 2450 sensor and External Relay Module
connect here.

Gnd

13

I/O

12

V+

11

3

L) input/output

Terminals 5-10: Relay Outputs

2 sets mechanical SPDT contacts programmable as:

• High or Low setpoint with adjustable hysteresis

• "Window" limits with adjustable hysteresis

• Time delay up to 6400 seconds.

• May be disabled (Off) if not used.

• Auxiliary power (terminals 1-2) MUST be connected for relay operation

2 Signet 8250-2 Level Transmitter

4.1 System Power/Loop Connections

Stand-alone application, no current loop used

Power Supply

8250-2

Terminals

Sys. Pwr. (Loop -)

Sys. Pwr. (Loop +)

AUX Power -

AUX Power +

Connection to a PLC/Recorder, separate supply

4
3
2
1

12 - 24 VDC

-

+

12 - 24 VDC

Power Supply

8250-2

Terminals

Sys. Pwr. (Loop -)

Sys. Pwr. (Loop +)

AUX Power -

AUX Power +

Note:
AUXILIARY power is required to operate the relays.

4
3
2
1

-

Power Supply

+

PLC or Recorder

Channel 1
4-20 mA in

-

Channel 1

+

4-20 mA in

Power
Supply
Power
Supply

Connection to a PLC with built-in power supply

8250-2

Terminals

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 +

4
3
2
1

Internal PLC
Connection

Two transmitters connected to PLC/Recorder

8250-2

Terminals

with separate power supply

4
3
2
1

4
3
2
1

PLC Terminals

Power Supply
Ground

-

Power
Supply

+

Channel 1
4-20 mA in

-

Channel 1
4-20 mA in

12 - 24 VDC

Power Supply

-

Power Supply

+

Channel 1

-

4-20 mA in

Channel 1

+

4-20 mA in

Channel 2

-

4-20 mA in

+

Channel 2
4-20 mA in

PLC or Recorder

4.2 Serial Data Connections

• The Input/Output terminals on the 8250 carry S3L™ serial data from the 2450 Pressure sensor and from the External Relay Module.

• You MUST reset sensor confi guration (see Calibrate menu) for all new systems and after connecting a new sensor or relay module
to the I/O terminals.

• Do not route sensor or output cables in conduit containing AC power wiring. Electrical noise may interfere with sensor signal.

• Routing 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 TOTAL cable length from I/O devices to the transmitter must not exceed 122 m (400 ft.).

• For best performance, ground the sensor SHIELD wire to a local earth ground at a point near the sensor.

• Consult the sensor manual for additional wiring information.

8250 I/O

Terminals

Shield (Gnd)

13

Red (I/O)

12

Black (V+)

11

The TOTAL cable length connected to
the 8250 input/output terminals must
not exceed 122 m (400 ft.)

2450 Pressure Sensor

8059 External

Relay Module

The External Relay Module
provides terminals to connect
the sensor in series.

3Signet 8250-2 Level Transmitter

5. System Confi guration

The 8250 Level Transmitter must be programmed using the following system confi guration procedure.

1. Determine where you want the level measurement to start. This is the Zero reference point (Z).
Review the diagram to help select the best option.

S

2. Determine where you will mount the sensor. This is
Consult the Sensor manual for information regarding the best location for the sensor.

3. Measure the distance between Z and S

4. Enter the Offset into the Calibrate menu.

. This is O(ffset).

Loc

Zero reference point (Z):

Defi nition:
The point in the vessel where you want the 8250 to display

zero (0 ft., 0 gal. etc).

• If Z is located below the fl uid surface, the 8250 will display
a positive level measurement.

• If Z is located above the fl uid surface, the 8250 will display
a negative level measurement.

Sensor Location point (S

Defi nition:

Loc

):

The point on the level sensor where the measurement is

taken.

• The 2450 Pressure sensor measures from the centerline of
the diaphragm.

Offset (O):

Defi nition:
The distance from the zero reference point (Z) to the sensor

location point (S

• Enter a positive value in the Calibrate menu if the sensor is

).

loc

located above Z (zero reference point).

• Enter a negative value in the Calibrate menu if the sensor
is located below Z (zero reference point).

• Enter 0 in the Calibrate menu if the sensor is located at Z
(zero reference point).

Level (L):

Defi nition:

• The distance from Z (zero reference point) to surface of
fl uid (displayed as "Level" by transmitter.

Loc

.

Z

For most vessels, the zero
reference point may be
designated as any height
in the vessel.

2450 Pressure Sensor Location and Offset

L > 0

S

Loc

O(ffset) > 0

Z

(ero)

L > 0

O(ffset) < 0

Z

For horizontal cylinders only,
the zero reference point MUST
be the lowest point in the
vessel.

Z

(ero)

L<0

O(ffset) < 0

Z

(ero)

S

Loc

S

Loc

4 Signet 8250-2 Level Transmitter

5.1 Level and Volume conversion in custom shaped vessels

If you select Custom Shape in the Options menu, you can defi ne
from 2 to 10 Custom Points to establish the relationship of level to
volume in the vessel.

• Select Manual level Measurement mode to edit both level and
volume data (dry confi guration).

• Select Automatic level Measurement mode to accept the
sensor measurement of the Level, while you assign a
volumetric value to each custom point (wet confi guration).

• Enter from 3 to 10 custom points to link level and volume
values.

• The fi rst custom point must be the lowest fl uid level in the
vessel.

• Each successive point must be greater than the preceding
point.

• The last point must be equal to or greater than the highest
fl uid level in the vessel.

• A custom point should be located at all transition points in
the vessel shape (for example, at custom point #9, where the
shape changes from a cylinder to a cone).

• The more complex sections should be defi ned with more
points. Notice that the conical section of the illustration has
been defi ned by custom points 1 through 9.

• Simpler sections require fewer defi ning points. Note that the
cylinder requires only custom points 9 and 10.

Custom point #10

Custom point #9

Custom point #8

Custom point #7

Custom point #6

Custom point #5

Custom point #4

Custom point #3

Custom point #2

Custom point #1

3000 gal.

1300 gal.

1000 gal.

700 gal.

380 gal.

250 gal.

160 gal.

118 gal.

45 gal.

0 gal.

5.2 Reference

Level, volume and mass calculations performed by the 8250
include:

Pressure to level conversion:

Level = P ÷ (SG • D
where P = Pressure

(water)

)

SG = Specifi c Gravity of fl uid

D

= Density of water

(water)

With pressure in psi: Level (meters) = (0.703069 • P / SG)

with pressure in bar: Level (meters) = 1.019715 • P / SG)

Mass conversion

m = D

(water)

• SG • V

where m = mass of fl uid

D
SG = Specifi c Gravity of fl uid

= Density of water = 1000 kg/m

(water)

3

V = Volume of fl uid (m3)

m (kg) = 1000 • SG • V

Volume calculations

Vertical cylinder: V = π • d2 • h/4

where d = diameter of cylinder
h = height of fl uid

Rectangular vessel: V = w • l • h

where w = width
l = length

Horizontal cylinder: V = A • L

where A = area of segment
L = Length of vessel

A

Length

r

h

Custom vessel:
The 8250 performs linear interpolation between adjacent points.

5Signet 8250-2 Level Transmitter

5.3 Relay Operation

y

Relay outputs can be used as switches that respond when the
process variables move above or below setpoints, or when the
process variables move outside of a window.

• The relays may be turned Off if not in use.

• Response can be delayed up to 6400 s ( see Calibrate menu).

Low:

Relay is energized when process variable is less than the setpoint.
The relay relaxes when the process variable moves above the
setpoint plus the hysteresis value.

High:

Relay is energized when process variable is greater than the
setpoint. The relay relaxes when the process variable moves
below the setpoint plus the hysteresis value.

Window

Relay is energized when the process variable moves above or
below a fi xed window of values. The relay relaxes when the
process variable moves inside the window by more than the
hysteresis value.

Note:

Relays will operate in reverse if miswired. Observe relay logic
appropriate to the application.

Relay energized

Rela

relaxed

Hysteresis

Low Setpoint

High Setpoint

Hysteresis

High Limit

Window

Low Limit

Process

Time

Process

Time

Process

Hysteresis

Hysteresis

Time

6. VIEW menu

• During normal operation, the ProcessPro displays the VIEW menu.

• To select a display, press the UP or DOWN arrow keys. The display selections 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.

• When using the CALIBRATE or OPTIONS menus, the ProcessPro will return to the VIEW menu if no key
is pressed for 10 minutes.

View Menu

Display Description

The following displays are permanent. They will remain as selected until you change them.

Level
+ 10.00 ft

Volume
+30.00 gal

LVL +10.00 ft
VOL +300.00 gal

The following displays are temporary. The permanent display will return after ten minutes.

Loop Output:

19.00 mA

Displays the Level value.
Permanent display when "Level" is the display selection in OPTIONS menu.

Displays the Volume value.
Permanent display when "Volume" is the display selection in OPTIONS menu.

Displays the Level and Volume simultaneously.
Permanent display when "Both" is the display selection in OPTIONS menu.

Displays the Loop (4-20 mA) output.

+10.00 ft

Signet Level
Transmitter

Relay 1

Level

Relay 2

ENTER

Relay A: On
Relay B: Off

No Relay Module
Detected

Last Cal:

Displays the status of Relays A and B.
Appears only when external relay module is detected.

Displayed if the relay module is not detected at Sensor Confi guration (see
calibrate menu).

Displays the date for scheduled maintenance or date of last calibration.

09-03-04

6 Signet 8250-2 Level Transmitter

7. ProcessPro Editing Procedure:

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 fi rst 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 fi rst display element will begin fl ashing.

Step 5. Press UP or DOWN keys to edit the fl ashing element.

• RIGHT ARROW key advances the fl ashing element.

Step 6. Press ENTER key to save the new setting and return to Step 3.

Notes on Step 1:

• The View Menu is normally displayed.

• The CALIBRATE and OPTIONS menus require a KEY CODE.

Press &
hold for
access:

VIEW

ENTER

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.

CALIBRATE: ----

Enter Key Code

2s 5s

CALIBRATE

OPTIONS

Notes on Steps 3 and 4:

• Refer to pages 8-10 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.

Step 3: Finished Editing?

Press the UP and DOWN keys simultaneously after
saving the last setting to return to normal operation.

CALIBRATE: *---

Enter Key Code

CALIBRATE: **--

Enter Key Code

CALIBRATE: ***-

Enter Key Code

LVL Units:

ft >

LVL Units:

ft >

Step 3

Relay 1 Setpnt:

+10.000 ft >

First item in CALI­BRATE menu

Step 4

Notes on Steps 5 and 6:

• All output functions remain active during editing.

• Only the fl ashing element can be edited.

• RIGHT ARROW key advances the fl ashing 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.

Relay 1 Setpnt:

+1

0.000 ft

Step 5: Made an Error?

Press the UP and DOWN keys simultaneously
while any element is fl ashing. This will recall the
last saved value of the item being edited and
return you to Step 3.

Relay 1 Setpnt:

+0

0.000 ft

Relay 1 Setpnt:

00.000 ft

+

Relay 1 Setpnt:

9.0000 ft >

+

Step 5

Relay 1 Setpnt:
+09.000 ft

Step 6

ENTER

Relay 1 Setpnt:

Saving

7Signet 8250-2 Level Transmitter

8. Calibrate Menu

Display

(Factory settings shown)

LVL Units:

Select the units of measure: ft, in, m,cm.

ft >

Show LVL in %:

Yes: Level will be displayed as a percentage of the full scale.
No: Level will be displayed as engineering units.

No >

LVL 100%:

If "Show LVL in %" is YES, enter the full scale value. The units are the same as LVL Units

+0.0000 ft >

Sensor Offset:

+0.0000 ft >

Enter the distance from sensor location to the Zero reference point in the vessel.
Enter + if the sensor is located above the Zero reference point.
Enter - if the sensor is located below the Zero reference point.

VOL Units:

Select the units of measure for Volume: gal, ft

gal >

Show VOL in %:

Yes: Volume will be displayed as a percentage of the full scale.
No: Volume will be displayed as engineering units.

No >

Description

3

, in3, m3, kg, lb, or lit (liters)

VOL 100%:

If "Show VOL in %" is YES, enter the full scale value. The units are the same as VOL Units

+0.0000 gal >

Spec Gravity:

1.0000 >

Enter the specifi c gravity of the fl uid. Factory setting is 1 (water)
This setting is required only if the level measurement is made by a pressure sensor
(Signet 2450), or if volume units are selected ( kg or lb ) .

Set LVL:

>

Single-point calibration for Level.

Reset LVL

to Factory Cal: >

Yes: Reset Level to original factory calibration. ("Set LVL" entry is erased.)
No: Return to menu, do not reset Level.

8 Signet 8250-2 Level Transmitter

8. Calibrate Menu (continued)

Display

(Factory settings shown)

Loop Source:

Select the source for the 4-20 mA Loop: LVL or VOL.

LVL >

Loop Rng: ft

Select the minimum and maximum values for the 4-20 mA Current loop output.

+0.0000 → +10.000 >

Relay 1 Mode:

Off >

The Relay settings below will not appear if the Relay mode is OFF

Relay 1 Source:

Select the mode of operation for Relay Output: Low, High, or Window.
The relay may be disabled (Off) if not in use.

Select the source for Relay: LVL or VOL.

LVL >

Relay 1 Setpnt:

+0.0000 ft >

Relay 1 Rng: ft

+0.0000 → +10.000 >

If Relay is in Low or High mode, the relay will be activated when the level or volume reaches
this value.

If Relay is in Window mode, the relay will be activated when the level or volume is less than
(low limit) or greater than (hig limit) the range. You must enter the low limit into the fi rst fi eld,
and the high limit into the second fi eld.

Description

Relay 1 Hys:

0.00 ft >

Relay 1 Delay:

0.0 secs >

• Relay settings will repeat for Relay #2 and for External relays A and B.

• A and B Relays require the optional External Relay Module (model number 3-8059)

Reset Sensor

Confi guration: >

Last Cal:

09-03-04 >

Relay will be deactivated at Setpoint ± Hysteresis.
The Hysteresis value is in Level units or % of full scale.

Set up to 6400 seconds delay time for relay response.
Relay will be activated only if the source value exceeds the setpoint for this time period.

Use this function during initial startup of a new system, and whenever a new sensor is added
to the system. It enables the 8250 to scan the sensor input terminals and determine the type
and specifi c serial numbers of the sensors connected to the sensor input.

Use this “note pad” to record important dates, such as annual recertifi cation or scheduled
maintenance.

9Signet 8250-2 Level Transmitter

9. Options Menu

Display

(Factory settings shown)

Contrast:

3 >

Display Option:

Level >

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.

Select Level, Volume or Both.
This setting will determine the permanent display selection.

Average:

Off >

Decimal:
***.** >

Loop Adjust:

4.00 mA >

Loop Adjust:

20.00 mA >

Test Loop:

>

Test Relay 1

Off provides near-instantaneous response to measurement changes.
Low (4 s averaging) Medium (8 s averaging) or High (32 s averaging) will stabilize the

system if your process experiences frequent fl uctuations or surface turbulence.

Set the decimal to the best resolution for your application. The display will automatically
scale up to this restriction. Select *****., ****.*, ***.** or **.***

Adjust the minimum and maximum current output. The display value represents the
precise current output. Adjustment limits:

• The 4.00 mA output can be adjusted from 3.80 mA minimum to 5.00 mA maximum

• The 20.00 mA output can be adjusted from 19.00 mA minimum to 21.00 mA maximum

• Use these adjustments 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 Relay #1 Off and On.

>

• Relay settings will repeat for Relay #2 and for external Relays A and B.

Description

• The following entries are used by the 8250 to convert the level into volumetric and mass measurements. The accuracy of

the entries entered will determine the accuracy of the volumetric and mass calculation. Refer to section 5 for additional
information.

VOL Shape:

Vert Cylinder >

VOL Diameter:

0.0000 ft >

Select the shape of the vessel where Sensor is located:

Vert Cylinder, Horiz Cylinder, Rectangular or Custom

If Vert Cylinder or Horiz Cylinder is selected:

Set the diameter of the cylinder
The unit of measure is set by "LVL Units" in Calibrate menu.

VOL Length:

0.0000 ft >

VOL Width:

0.0000 ft >

Number of Custom

Points: 10 >

LVL Measurement:

Manual >

If Horizontal Cylinder or Rectangular shape is selected:

Set the length of the vessel. The unit of measure is set by "LVL Units" in Calibrate menu.

If Rectangular shape is selected:

Set the width of the vessel. The unit of measure is set by "LVL Units" in Calibrate menu.

If Custom shape is selected, enter the number of manual calibration points to be
entered. Minimum is 3 points, maximum is 10 points.

If Custom shape is selected: select Manual or Automatic level measurement.
Manual allows you to Edit both the Level measurement and the Volume measurement.
Automatic allows you to Edit only the Volume measurement (while displaying Level value)

P01: +0.0000 ft
V: +0.0000 gal >

10 Signet 8250-2 Level Transmitter

Set the Volume (and Level if manual measurement is selected) at each custom point in
your vessel.

10. Troubleshooting

Display Condition Suggested SolutionsPossible Causes

"Value must be 6400 or less"

"Value must be more than zero"

"Must have more than 1 point"
"Must have 10 or less points"

"Must be > than previous point"

"CustomTable Error"

"CHK SENSOR"
appears in VIEW mode

"Too Much Error
Check Sensor" appears during
"SET LVL1" in Calibrate menu

"0 SENR(S)
FOUND: SAVE ?" appears during
"Reset Sensor Confi guration" in
Calibrate menu

Time delay cannot be greater than 6400 s.

Specifi c gravity value set to 0.0000

Custom Shape requires from 3 to10 custom
points.

A custom point has been entered that is not
greater than the previous point.
(Custom points must be in ascending order.)

Number of custom points increased without
setting new values so all custom points are
not sequential.

Sensor-related problem during different
operational modes:

1. AUXILIARY POWER was not connected
when LOOP power startedWiring problem:

2. The sensor is not connected properly

3. The sensor has not been confi gured

("CHK SENSOR" and "Too Much Error")

4. The sensor is defective

Set time delay to a 6400 s or less.

Set Specifi c gravity to a value greater than 0.

Set number of custom shape points to a value
from 3 to 10.

Reset the custom point to a value greater than
the preceding point.

Review all custom points and reset values so
each point is greater than the preceding point.

1. Start AUX power, then LOOP power

2. Check sensor wiring

3. "RESET SENSOR CONFIGURATION" in
CALIBRATE menu.

4. Replace the sensor, then RESET SENSOR
CONFIGURATION.

"No Relay Module Found"

• External Relay Module wiring is loose

• Relay module has been disconnected

• Relay module has been replaced

• Relay module is defective

1. Check wiring

2. RESET SENSOR CONFIGURATION

3. Replace External Relay Module.

11Signet 8250-2 Level Transmitter

Ordering Information

Mfr. Part No. Code Description

3-8250-2 159 000 766 Level Transmitter, Field Mount
3-8250-2P 159 000 767 Level Transmitter, Panel Mount
3-8059-2 159 000 770 External Two-Relay Module
3-8059-2AC 159 000 771 External Two-Relay Module w/Power Supply

Accessories

Mfr. Part No. Code Description

3-8050 159 000 184 Universal mounting kit
3-8050.395 159 000 186 NEMA 4X Back Cover
3-8052 159 000 188 3/4” Integral mounting kit
3-8050.396 159 000 617 RC Filter Kit (for relay use), 2 per kit
3-0000.596 159 000 641 Heavy Duty Wall Mount Bracket
3-9000.392 159 000 368 Liquid-tight connector kit, 3 sets, 1/2 in. NPT5
3-9000.392-1 159 000 839 Liquid-tight connector kit, 1 set, 1/2 in. NPT5
3-9000.392-2 159 000 841 Liquid-tight connector kit, 1 set, PG 13.5
7300-7524 159 000 687 7.5W 24V Power Supply
7300-1524 159 000 688 15W 24V Power Supply
7300-3024 159 000 689 30W 24V Power Supply
7300-5024 159 000 690 50W 24V Power Supply
7300-1024 159 000 691 100W 24V Power Supply

George Fischer Signet Inc., 3401 Aerojet 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]

3-8250.090-2 Rev. E 11/05 English © George Fischer Signet, Inc. 2001 Printed in U.S.A. on recycled paper