Georg Fischer 8850 Operating Manual

Signet 8850-1 Conductivity/Resistivity Transmitter

*3-8850.090-1*

3-8850.090-1 Rev. G 3/06 English

English

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

62.50 uS/cm

Conductivity/Resistivity

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 a separate mounting kit. The 3-8050 Universal kit enables the transmitter to be installed virtually anywhere. Detailed instructions for ﬁ eld installation options are included with 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.

96 mm

(3.8 in.)

FRONT VIEW

Field Mount &

Panel Mount

96 mm (3.8 in.)

41 mm (1.6 in.

)

SIDE VIEW

Panel Mount

Optional Rear Cover

56 mm (2.2 in.)

97 mm (3.8 in.)

92 mm (3.6 in.)

8050

42 mm (1.7 in.)

64 mm (2.5 in.)

106 mm (4.2 in.)

SIDE VIEW

Field Mount w/ 8050 Universal base

82 mm (3.23 in.)

42 mm (1.7 in.)

107 mm (4.2 in.)

SIDE VIEW

Field Mount w/ 8052 Integral kit

8052

65 mm (2.5 in.)

96 mm

(3.8 in.)

25.0 C

Signet

Transmitter

ENTER

2. Speciﬁ cations

General

Compatible electrodes: Signet 3-28XX-1 Standard and Certiﬁ ed

Series Conductivity/Resistivity Electrodes Accuracy: ±2% of reading 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

• Contrast: User selected, 5 levels

• Update rate: 1.8 s

Electrical

• Power: 12 to 24 VDC ±10%, regulated, 80 mA max. Sensor input range:

• Conductivity: 0.01 µS/cm to 400,000 µS/cm

• Resistivity: 10 KΩ•cm to 100 MΩ•cm

• TDS: 0.023 to 200 000 PPM nominal (adjustable µS/PPM)

• Temperature: PT 1000, -25 to 120°C (-13 to 248°F) Measurements above 10 MΩ (below 0.1 µS) must be

performed in solution temperatures from 20°C to 100°C.

4 to 20 mA Outputs:

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

outputs are independently source selectable for conductivity or temperature.

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

• Update rate: 200 ms

• Accuracy: ±0.03 mA @ 25°C, 24 V Open-collector output, optically isolated:

• 50 mA max. sink, 30 VDC maximum pull-up voltage.

• Programmable for:

• High, Low with adjustable hysteresis

• Pulse operation (max. rate: 400 pulses/min).

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

U.S.A. Patent # 5,708,363

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.

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.

Terminals 3 and 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

System Pwr

Loop -

System Pwr

Loop +

AUX

Power -

AUX Power +

Terminals 1-2: Auxiliary power

Provides DC power to measurement circuit. Required for all 8850 systems

Output -

Output +

Internal open-collector

output circuit

Terminals 7-10: Sensor input

7 is conductivity input 8 is temperature input 9 is the isolated signal ground 10 is the sensor earth ground

Sensr Gnd (SHIELD)

Iso. Gnd (BLACK)

Temp. IN (WHITE)

Signal IN (RED)

15Ω

Output --

Output +

≤ 100 ft. (30 m)

3.1 Sensor Input Connections

Terminals

Shield (Sensor Gnd)

Black (Iso Gnd)

White (Temp In)

Red (Signal In)

Isolation

Terminals 5-6: Open-collector Output

• A transistor output, programmable (see CALIBRATE menu) as High or Low setpoint with adjustable hysteresis and proportional Pulse (to 400 pulses per minute maximum).

• May be disabled (Off) if not used.

62.50 uS/cm

25.0 C

Signet

Conductivity/Resistivity

Transmitter

ENTER

Signet 28XX-1

Standard and Certified Cells

2 8850-1 Conductivity/Resistivity Transmitter

Select the sensor with the range that best straddles your application requirements.

• 2819-1, 2839-1 (0.01 cell): 0.01 to 100 µS (10 kΩ to 100 MΩ) Use the 2819-1 or the 2839-1 for all resistivity requirements

• 2820-1, 2840-1 (0.1 cell): 1 to 1000 µS

• 2821-1, 2841-1 (1.0 cell): 10 to 10,000 µS

• 2822-1, 2842-1 (10.0 cell): 100 to 200,000 µS

• 2823-1 (20.0 cell): 200 to 400,000 µS

UPW @ 25°C

3-2819, 3-2839

Bottled

USP

Rinse Water

3-2820, 3-2840 ( 0.10 Cell)

Water

3-2822, 3-2842 (10.0 Cell)

3-2821, 3-2841 (1.0 Cell)

(0.01 Cell)

3-2823

Cooling Tower Waste Waters

Brackish Sea Water

(Salinity)

Deionization Regen. Chemicals

Alkali Cleaners, Acids/Bases

(20.0 Cell)

3.2 System Power/Loop Connections

Stand-alone application, no current loop used

System Pwr Loop -

System Pwr Loop +

AUX Power -

AUX Power +

Connection to a PLC/Recorder, separate supply

Transmitter

Terminals

System Pwr Loop -

System Pwr Loop +

AUX Power -

AUX Power +

AUX power required for all 8850 systems

Transmitter

Terminals

PLC or Recorder

Loop Input

4-20 mA

Power

Supply

12-24 VDC

0.010mS 100 MΩ

0.054mS

18.3 MΩ

1mS 1MΩ

10mS

100KΩ

Power

Supply

12-24 VDC

100mS

10KΩ

1,000mS 10,000mS

200mS

50,000mS

100,000mS

200,000mS

400,000mS

Connection to a PLC with built-in power supply

System Pwr Loop -

System Pwr Loop +

AUX Power -

AUX Power +

Transmitter

Terminals

Internal

Connection

PLC

PLC Terminals

Loop Input

4-20 mA

Power

Supply

12-24 VDC

Example: Two transmitters connected to PLC/Recorder with separate power supply

PLC or Recorder

Channel 1 4-20 mA in

Channel 2 4-20 mA in

Power

Supply

12-24 VDC

Transmitter 2

System Pwr Loop -

System Pwr Loop +

AUX Power -

AUX Power +

Transmitter 1

Terminals

System Pwr Loop -

System Pwr Loop +

AUX Power -

AUX Power +

38850-1 Conductivity/Resistivity Transmitter

3.3 Open Collector Output

The Open Collector 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 pulse at 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 variable is greater than the setpoint. The output will relax when the process variable moves below the setpoint plus the hysteresis value.

Process

Hysteresis

Low Setpoint

Time

Relay energized

Relay relaxed

• Proportional Pulsing The Open Collector output will generate a 100 mS pulse at the rate deﬁ ned by settings in the CALIBRATE menu.

In the example below:

• The output will be 0 pulses/min. when value is less than 5.

• The output will be 50 pulses/min. when value is 7.5.

• The output will be 100 when value is greater than 10.

The starting point, endpoint and maximum pulse rate are select able in the CALIBRATE menu.

100 pulses

0 to 100 Pulses/min.

Open Collector Output Rate:

Pulse rate

0 pulses

Process

Starting point

High Setpoint

Hysteresis

Time

VIEW menu

• During normal operation, ProcessPro displays the VIEW menu.

• When editing the CALIBRATE or OPTIONS menus, ProcessPro will return to the VIEW menu if no activity occurs for 10 minutes.

• To select a VIEW display, press the UP or DOWN arrow keys. The selections will scroll in a continuous loop.

• Changing the VIEW display does not interrupt system operations.

• No key code is necessary to change display selection.

• Output settings cannot be edited from the VIEW menu.

View Menu

Display Description

endpoint

62.50 uS/cm

Conductivity/Resistivity

Transmitter

25.0 C

Signet

ENTER

123.45 µS/cm +67.89 ºC

Monitor the Conductivity and Temperature values from the sensor. This is the permanent display.

The VIEW displays below are temporary. The permanent display will return after 10 minutes

Loop Output:

13.75 mA

Last CAL: 04-20-07

4 8850-1 Conductivity/Resistivity Transmitter

Monitor the Loop Current output.

Check the Last Calibration date.

+ 8 hidden pages

Georg Fischer 8850 Operating Manual

Specifications and Main Features

Frequently Asked Questions

User Manual