Georg Fischer 2839-1V, 2840-1V, 2841-1V, 2842-1V Operating Manual

Signet 2839-1V to 2842-1V PVDF Conductivity Electrodes

*3-2840.090-1*

3-2840.090-1 Rev. B 01/15

Operating Instructions

Table of Contents

English

2839: 0.01 cm-12840: 0.1 cm

2841: 1.0 cm

2842: 10.0 cm

-1

-1

-1

Warranty Information ............................................................................ 2

Product Registration ............................................................................. 2

Safety Information................................................................................. 2

Specifi cations........................................................................................ 3

Dimensions ........................................................................................... 3

Cell Constant Selection ........................................................................ 4

Custom Cell Certifi cate ......................................................................... 4

Installation............................................................................................. 4

In-Line Installation................................................................................. 4

Submersible Installation........................................................................ 5

Integral Installation................................................................................ 5

General Wiring ...................................................................................... 6

ProcessPro Wiring ................................................................................ 6

SmartPro Wiring ................................................................................... 6

Maintenance ......................................................................................... 7

2842 Insulator ....................................................................................... 7

Ordering Information ............................................................................. 8

• English

• Deutsch

• Français

• Español

• Italiano

• 中文

Warranty Information

Safety Information

Refer to your local Georg Fischer Sales offi ce for the most
current warranty statement.

All warranty and non-warranty repairs being returned must
include a fully completed Service Form and goods must be
returned to your local GF Sales offi ce or distributor.
Product returned without a Service Form may not be
warranty replaced or repaired.

Signet products with limited shelf-life (e.g. pH, ORP, chlorine
electrodes, calibration solutions; e.g. pH buffers, turbidity
standards or other solutions) are warranted out of box but not
warranted against any damage, due to process or application
failures (e.g. high temperature,
mishandling (e.g. broken glass,

chemical poisoning, dry-out) or

damaged membrane, freezing

and/or extreme temperatures).

Product Registration

Thank you for purchasing the Signet line of Georg Fischer
measurement products.

If you would like to register your product(s), you can now
register online in one of the following ways:

• Visit our website www.gfsignet.com.
Under Service and Support click on

Product Registration Form

• If this is a pdf manual (digital copy),

click here

1. Depressurize and vent system prior to installation or
removal.

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.

5. Do not alter product construction.

6. When using chemicals or solvents care should be taken
and appropriate eye, face, hand, body, and/or respiratory
protection should be used.

Caution / Warning / Danger

Indicates a potential hazard. Failure to follow all warnings
may lead to equipment damage, injury, or death

Electrostatic Discharge (ESD) / Electrocution Danger

Alerts user to risk of potential damage to product by ESD,
and/or risk of potential of injury or death via electrocution.

Personal Protective Equipment (PPE)

Always utilize the most appropriate PPE during
installation and service of Signet products.

Pressurized System Warning

Sensor may be under pressure, take caution to vent
system prior to installation or removal. Failure to do so
may result in equipment damage and/or serious injury.

Hand Tighten Only

Overtightening may permanently damage product threads
and lead to failure of the retaining nut.

Do Not Use Tools

Use of tool(s) may damage product beyond repair and
potentially void product warranty.

Note / Technical Notes

Highlights additional information or detailed procedure.

2

Signet PVDF Conductivity Sensors

Specifi cations

59.3 mm
(2.33 in.)

73.7 mm
(2.90 in.)

140.7 mm
(5.54 in.)

15.9 mm

(0.625 in.)

21.5 mm
(0.85 in.)

35.8 mm
(1.41 in.)

102.7 mm
(4.05 in.)

15.9 mm

(0.625 in.)

15.9 mm

(0.625 in.)

26.8 mm
(1.13 in.)

109 mm

(4.29 in.)

41.9 mm
(1.65 in.)

Dimensions

General

Instrument Compatibility .......2850, 8850-3, 8860, 9900

Cable

4.6 m (15 ft) std., 3 conductor with shield, 22 AWG,
max length 30 m (100 ft). For resistivity measurements above
10 MΩ or below 20 °C, maximum cable length is 7.6 m (25 ft).

Process Connection

-1V ........................................

-1VD ......................................ISO 7/1-R 3/

3

/4 in. NPT

4

Wetted materials

Threaded fi tting.........................PVDF

Insulator ....................................PVDF

Insulator O-ring (2841, 2842) ...FPM

Electrode contacts ....................316L stainless steel

Shipping Weight

2839..........................................0.34 kg (0.74 lb)

2840, 2841, 2842......................0.30 kg (0.66 lb)

Performance

Accuracy ...................................±2% of cell value

Temp. measurement .................PT1000

Temp. response time (T):

2839 ......................................5 s

2840 ......................................10 s

2841 ......................................20 s

2842 ......................................30 s

Operating Pressure / Temperature

With thread engagement per ANSI B1.20.1

-10 ºC to 100 ºC @ 6.9 bar (14 ºF to 212 ºF @ 100 psi)

-10 ºC to 131 ºC @ 2.76 bar (14 ºF to 268 ºF @ 40 psi)

Storage Temperature ................ -20 ºC to 131 ºC

(-4 ºF to 268 ºF)

2839: 0.01 cm

2840: 0.1 cm

-1

-1

PSIBAR
100

7

75

5

50

3

2

25

°C

°F

-20-40

32 68

20

60

140

100 140

212

Standards and Approvals

• Manufactured under ISO 9001 for Quality,
ISO 14001 for Environmental Management and
OHSAS 18001 for Occupational Health and Safety.

• RoHS Compliant

China RoHS (Go to www.gfsignet.com for details)

284

2841: 1.0 cm-12842: 10.0 cm

-1

Signet PVDF Conductivity Sensors

3

(100 M) (10 k)

2839 0.01 cm

-1

2841 1.0 cm

-1

2842 10.0 cm

-1

2840 0.1 cm

-1

0.010μs1μs10μs 100μs 1000μs 10,000μs 200,000μs

Conductivity Range (μS)

Signet Conductivity/Resistivity Electrode Ranges

Electrode Models

Cell Constant Selection

The nominal process value should be near the center of the range.
Ranges below are for use with Signet Conductivity Instruments:

• 2839 (0.01 cm

• 2840 (0.1 cm

• 2841 (1.0 cm

-1

): 0.010 to 100 μS (10 kΩ to 100 MΩ)

-1

): 1 to 1000 μS (1 MΩ to 1 kΩ)

-1

): 10 to 10,000 μS

• 2842 (10.0 cm-1): 100 to 200,000 μS

Custom Cell Certifi cate

The sensor was delivered from the factory with a calibration certifi cate.
The information provided on the certifi cate (custom cell constant and
temperature offset) should be entered in the transmitter/controller. See
individual product manual for details.

Installation

• Inspect threads to ensure integrity. Do not install an electrode with damaged threads.

• Apply sealant or PTFE tape to threads.

• Wetted materials include 316L stainless steel, PVDF and FPM (FPM O-ring inside 2841, 2842). Check
for chemical compatibility before installing electrode.

• Electrodes are supplied with 4.6 m (15 ft) of cable. It may be extended to a maximum 30 m (100 ft).

• For resistivity measurements above 10 MΩ or below 20 °C, maximum cable length is 7.6 m (25 ft).

• When using the 2850 Conductivity/Resistivity Sensor Electronics, maximum cable length is 4.6 m (15 ft).

• When using 9900, maximum cable length is 30 m (100 ft).

In-Line Installation

If the electrode is mounted vertically in a tee, do not recess the openings
inside the tee. Mounting upside down may help prevent air entrapment.

An oversized tee may also be helpful for inline installations.

At least 4 threads (ANSI B1.20.1) must be engaged to provide pressure
capacity per published specifi cations.

The preferred installation for in-line applications directs fl ow straight into the electrode.

This confi guration dislodges entrapped air bubbles, and provides the best continuous sampling of the fl uid content.

4

Signet PVDF Conductivity Sensors

Fill with
3 to 4 in.
of sealant

8850-3

Conductivity Transmitter

locking ring
conduit base

8052 integral
adapter

electrode

Max cable length

15.2 cm (6 in.)

9900-1 Field Mount

with 8052 Integral Mounting Kit

and 9900.396 Angle Adjustment Adapter

Submersible Installation

1. Feed cable into watertight conduit.

2. Apply thread sealant to the electrode before threading conduit onto electrode. Avoid twisting the cable.

3. Secure cable with conduit or cable gland.

4. For additional defense against possible accumulation of condensation at the back seal area of the electrode,
fi ll the lower 75 mm to 100 mm (3 in. to 4 in.) of conduit or extension pipe with a fl exible sealant such as silicone.

3

/4 in. NPT or

ISO 7/1-R 3/

4

Integral Installation

In aerated vessels install the electrode in a stillwell to
prevent air from being trapped inside the electrode.

• 3-8052 Integral Kit and 3-9000.392-X Liquid Tight Connector kit are required. (See Parts and Accessories on back page).

• Cut the cable to approx. 15 cm (6 in.).

• Strip outer cable cover back 5 cm (2 in.).

• Strip each conductor to expose 1 cm (3/8 in.) of bare wire.

• Tin each conductor with solder for best results.

Signet PVDF Conductivity Sensors

5

To 8850-3

Sensr Gnd
(SHIELD)

Iso. Gnd
(BLACK)

Temp. IN
(WHITE)

Signal IN
(RED)

14

13

12

11

To 8860

SHLD

ISO GND

TEMP 1

SGNL 1

RED

WHITE

BLACK

SHIELD (Gnd)

SHLD

ISO GND

TEMP 1

SGNL 1

RED

WHITE

BLACK

SHIELD (Gnd)

Ch 1

Ch 2

General Wiring

• Do not route electrode cable in conduit containing AC power wiring. Electrical noise may interfere with electrode signal.

• Routing electrode cable in grounded metal conduit will help prevent electrical noise and mechanical damage.

• Seal cable entry points to prevent moisture damage.

• For resistivity measurements above 10 MΩ or below 20 °C, maximum cable length is 7.6 m (25 ft).

ProcessPro Wiring

SmartPro Wiring

with 8052 Integral Mounting Kit

9900-1 Field Mount

and 9900.396 Angle Adjustment Adapter

9900.394

Direct Conductivity/Resistivity Module

Input Connector

Iso. Ground

Temp. In

Shield

Signal

Shield
White

9900 S3L Input

SHLD

DATA

GND

V+

via 2850 Sensor Electronics

White
Red
Black

Gnd

3

Data

2
1

V+

SW1

Sensr Gnd
(SHIELD)

4

CTS

3
2

ON

1

D3

Temp. IN
(WHITE)

Signal RTN
(BLK)

Signal IN
(RED)

6

Signet PVDF Conductivity Sensors

Black
Red

Maintenance

Conductivity electrodes require little maintenance except for periodic cleaning in installations where contaminants are present.

• Keep metal surfaces clean and free of coatings.

2842 Insulator

Replacement Insulator, 2842 electrode only

• 2842 electrodes have a removable insulator so the internal cavity can be cleaned.

• After the insulator snaps into position it cannot be removed without damage.

• Order insulator replacement kit 3-2842.390 before attempting maintenance.

9 mm

(0.34 in.)

NOTE:

Contact the manufacturer for

11 mm

(0.44 in.)

14 mm

(0.55 in.)

replacement part number and cost.

25.4 mm (1.0 in.)

41 mm (1.6 in.)

3-2842.390 Insulator replacement kit

Insulator removal and replacement

A. Thread the screw into the insulator (8-32 thread).
B. Pull to remove the old insulator.
C. Clean any coating or deposits inside the electrode.
D. Insert the new insulator and press into place.

Electrode tip

(end view)

A

C

Internal contact

Electrode tip

(side view)

Electrode

B

Cotton swab

¥ Clean internal and external surfaces

8-32 thread for removal

Insulator

D

electrode tip

(side view)

New Insulator

Signet PVDF Conductivity Sensors

7

Ordering Information

PVDF Conductivity Electrodes

Mfr. Part No. Code Description

3-2839-1V 159 001 810 Cell 0.01, 4.6 m (15 ft) cable, PVDF NPT threaded fi tting
3-2839-1VD 159 001 811 Cell 0.01, 4.6 m (15 ft) cable, PVDF ISO threaded fi tting
3-2840-1V 159 001 812 Cell 0.1, 4.6 m (15 ft) cable, PVDF NPT threaded fi tting
3-2840-1VD 159 001 813 Cell 0.1, 4.6 m (15 ft) cable, PVDF ISO threaded fi tting
3-2841-1V 159 001 814 Cell 1.0, 4.6 m (15 ft) cable, PVDF NPT threaded fi tting
3-2841-1VD 159 001 815 Cell 1.0, 4.6 m (15 ft) cable, PVDF ISO threaded fi tting
3-2842-1V 159 001 816 Cell 10.0, 4.6 m (15 ft) cable, PVDF NPT threaded fi tting
3-2842-1VD 159 001 817 Cell 10.0, 4.6 m (15 ft) cable, PVDF ISO threaded fi tting

2850 Conductivity/Resistivity Sensor Electronics

3-2850-51 159 001 398 Sensor Electronics, 3/4 in. NPT j-box, one input/one Digital (S3L) output
3-2850-52 159 001 399 Sensor Electronics, 3/4 in. NPT j-box, one input/one 4 to 20 mA output
3-2850-61 159 001 400 Sensor Electronics, Universal Mount j-box, one input/one Digital (S3L) output
3-2850-62 159 001 401 Sensor Electronics, Universal Mount j-box, one input/one 4 to 20 mA output
3-2850-63 159 001 402 Sensor Electronics, Universal Mount j-box, two inputs/two Digital (S3L) outputs

3-2850-51-39V 159 001 818 Integral 2850 system, Digital (S3L) output, 0.01 cell, PVDF NPT threads
3-2850-51-40V 159 001 819 Integral 2850 system, Digital (S3L) output, 0.1 cell, PVDF NPT threads
3-2850-51-41V 159 001 820 Integral 2850 system, Digital (S3L) output, 1.0 cell, PVDF NPT threads
3-2850-51-42V 159 001 821 Integral 2850 system, Digital (S3L) output, 10 cell, PVDF NPT threads
3-2850-51-39VD 159 001 822 Integral 2850 system, Digital (S3L) output, 0.01 cell, PVDF ISO threads
3-2850-51-40VD 159 001 823 Integral 2850 system, Digital (S3L) output, 0.1 cell, PVDF ISO threads
3-2850-51-41VD 159 001 824 Integral 2850 system, Digital (S3L) output, 1.0 cell, PVDF ISO threads
3-2850-51-42VD 159 001 825 Integral 2850 system, Digital (S3L) output, 10 cell, PVDF ISO threads

3-2850-52-39V 159 001 826 Integral 2850 system, 4 to 20 mA output, 0.01 cell, PVDF NPT threads
3-2850-52-40V 159 001 827 Integral 2850 system, 4 to 20 mA output, 0.1 cell, PVDF NPT threads
3-2850-52-41V 159 001 828 Integral 2850 system, 4 to 20 mA output, 1.0 cell, PVDF NPT threads
3-2850-52-42V 159 001 829 Integral 2850 system, 4 to 20 mA output, 10 cell, PVDF NPT threads
3-2850-52-39VD 159 001 830 Integral 2850 system, 4 to 20 mA output, 0.01 cell, PVDF ISO threads
3-2850-52-40VD 159 001 831 Integral 2850 system, 4 to 20 mA output, 0.1 cell, PVDF ISO threads
3-2850-52-41VD 159 001 832 Integral 2850 system, 4 to 20 mA output, 1.0 cell, PVDF ISO threads
3-2850-52-42VD 159 001 833 Integral 2850 system, 4 to 20 mA output, 10 cell, PVDF ISO threads

Replacement Parts

3-8050-1 159 000 753 Universal mount junction box
3-8052 159 000 188
3-9000.392-1 159 000 839 Liquid-tight connector kit, one set, 1/2 in. NPT
3-9000.392-2 159 000 841 Liquid-tight connector kit, one set, PG 13.5
3-9900.396 159 001 701 Angle Adjustment Adapter
5523-0322 159 000 761 Sensor cable (per ft), 3 conductor plus shield

3

/4 in. Integral mounting kit

Georg Fischer Signet LLC, 3401 Aero Jet 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]
For the most up-to-date information, please refer to our website at www.gfsignet.com

3-2840.090-1 Rev. B 01/15 English © Georg Fischer Signet LLC 2015