Georg Fischer 2850 Operating Manual

Signet 2850 Conductivity/Resistivity Sensor Electronics (PVDF)

*3-2850.090-1*

3-2850.090-2 Rev. C 03/15

Operating Instructions

English

3-2850-51, 3-2850-52

with ¾-in. adapter

3-2850-61, 3-2850-62, 3-2850-63

with Universal adapter

3-2850-51-XXV(D), 3-2850-52-XXV(D)

PVDF Integral System

Description

• Signet 2850 Conductivity/Resistivity Sensor Electronics provides either a two-wire 4 to 20 mA output or Digital (S3L) format.

• The 4 to 20 mA output models provide eight ranges for each electrode cell constant, plus the ability to invert each range.

• The EasyCal feature allows the devices to automatically recognize standard conductivity test solution values for simple ﬁ eld calibration.

• The Conductivity Sensor provided with integral systems will have its custom cell constant information programmed into the electronics at the factory to provide a 2% sensor accuracy. See page 6 for details.

Table of Contents

Description ............................................................................................ 1

Dimensions ........................................................................................... 1

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

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

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

Speciﬁ cations........................................................................................ 2

Conductivity Sensor Dimensions .......................................................... 3

Operating Range Chart......................................................................... 3

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

Tank Installation .................................................................................... 4

4 to 20 mA Wiring ................................................................................. 5

Digital (S3L) Wiring ................................................................................ 5

Dual Input Wiring (Dual Digital (S3L) Output) ........................................ 5

Cell Constant Selection ........................................................................ 6

Range Selection for 4 to 20 mA Output ................................................ 7

Calibration............................................................................................. 8

EasyCal ................................................................................................ 8

Dual Input Calibration ........................................................................... 8

Maintenance ......................................................................................... 9

Troubleshooting .................................................................................... 9

Electronic Certiﬁ cation ........................................................................ 10

Ordering Information ........................................................................... 12

• English

• Deutsch

• Français

• Español

• Italiano

Dimensions

2850-51, -52 Integral mount 2850-61, -62, -63 Universal mount

95 mm

3.74 in.

85 mm

3.34 in.

95 mm

3.74 in.

82 mm

3.24 in.

Warranty Information

Speciﬁ cations

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

Safety Information

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.

Note / Technical Notes

Highlights additional information or detailed procedure.

General

Compatible Electrodes ............. Any Signet Conductivity/

Resisitivity electrode

(2818-2823, 2839-2842)

Temperature Compensation .....PT-1000 RTD (2% per °C)

Pure Water Compensation ....... Auto-switching when using

0.01 cell and raw conductivity

value < 0.5 S

EasyCal

Automatic recognition of the following conductivity values:

• 146.93 S, 1408.8 S, 12856 S (@ 25 °C) (Test solutions per ASTM D1125-95)

• 10 S, 100 S, 200 S, 500 S, 1000 S, 5000 S, 10,000 S,

50,000 S, 100,000 S (@ 25 °C)

Power

• 12 to 24 VDC (4 to 20 mA output)

• 5 VDC ±5% regulated, 3.0 mA max. for Digital (S

L) output

(Reverse polarity and short circuit protected)

Digital (S

L) Output ................. Serial ASCII, TTL level 9600 bps

Accuracy

• Conductivity ..........................±2% of reading

• Temperature ..........................±0.5 °C

Resolution

• Conductivity ..........................0.1% of reading

• Temperature ..........................< 0.2 °C

Update Rate

• Single Input models ..............< 600 ms

• Dual Input models .................< 1.2 s

Current Output

Field-selectable ranges. Factory set span:

• 0.01 cell

(2818, 2819, 2839)

.. 4 to 20 mA = 0 to 100 S

• 0.10 cell (2820, 2840) ........... 4 to 20 mA = 0 to 1000 S

• 1.0 cell (2821, 2841) ............. 4 to 20 mA = 0 to 10,000 S

• 10.0 cell (2822, 2842) ........... 4 to 20 mA = 0 to 200,000 S

• 20.0 cell (2823) ..................... 4 to 20 mA = 0 to 400,000 S

Max. Loop Resistance .............. 50  @ 12 VDC

325  @ 18 VDC

600  @ 24 VDC

Accuracy ................................... ±2% of output span

Resolution.................................7 A

Update Rate .............................<600 ms

Error Indication ......................... 22 mA

Available data via Digital (S

L) Output

• Raw conductivity

• Calibrated conductivity

• Calibrated temperature-compensated conductivity

• Temp. Error Indication ........... Open input and out-of-range

diagnostics for temperature or

internal electronic error.

Environmental

Material ..................................... PBT

Enclosure Rating ...................... NEMA 4X/IP65

Operating Temperature .............-10 to 85 °C (14 to 185 °F)

Storage Temperature ................-20 to 85 °C (-4 to 185 °F)

Relative Humidity......................0 to 95%, non-condensing

Shipping Weight .......................0.75 kg (1.75 lb.)

Standards and Approvals

• CE, RoHS Compliant

• Manufactured under ISO 9001 for Quality,

ISO 14001 for Environmental Management and OHSAS 18001 for Occupational Health and Safety.

China RoHS (Go to www.gfsignet.com for details) This device complies with Part 15 of the FCC rules.

Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference received,

including interference that may cause undesired operation.

2850 Conductivity/Resistivity Sensor Electronics

Conductivity Sensor Dimensions

73.7 mm

2.90 in.

32.39 mm (1.28 in.)

3-2839

3-2818

59.3 mm

2.33 in.

73.66 mm (2.9 in.)

41.91 mm (1.65 in.)

12.7 mm (0.5 in.)

35.8 mm

1.41 in.

3-2840

4.6 m (15 ft) cable (std)

152 mm (6 in.)

12.7 mm (0.5 in.)

3-2819, 3-2820, 3-2821

Operating Range Chart

107 mm (4.2 in.)

49.5 mm (1.95 in.)

21.5 mm

0.85 in.

41.9 mm

1.65 in.

¾ in. NPT

2820-x

20.3 mm (0.8 in.)

2821-x

7.6 mm (0.3 in.)

3-2841, 3-2842

26.8 mm

1.13 in.

T1 = 50 mm (2.0 in.) T2 = 64 mm (2.5 in.)

152 mm (6.0 in.)

126 mm (5.0 in.)

3-2819, 3-2820, 3-2821

Sanitary

13 mm (0.5 in.)

203 mm

8.0 in.

3-2823

89 mm

3.5 in.

(0.01 Cell)

0.010 μS

0

UPW @ 25°C

(0.10 Cell)

2818/2819/2839

0

USP

10 μS

.

2821/2841

(1.0 Cell)

2820/2840

1 μS

0

0.5 μS 20 μS

Bottled

(20.0 Cell)

(10.0 Cell)

100 μS

50 μS

.

Water

2823

2822/2842

1,000 μS 10,000 μS

Cooling Tower Waste Waters

Deionization Regen. Chemicals

Alkali Cleaners, Acids/Bases

50,000 μS

200,000 μS

400,000 μS 200 μS 100,000 μS 0.055 μS

2850 Conductivity/Resistivity Sensor Electronics

In-Line Installation Tank Installation

While the 2850-5X and 2850-6X electronics cannot be submerged, either model will accommodate tank installation.

Select any electrode with a 5 m (15 ft) cable. The cable may be cut to length, but it CANNOT BE EXTENDED.

Most of the Conductivity/Resistivity electrodes used with the 2850 can be installed into standard 3/4 in. (NPT or ISO 7-R3/4) ﬁ ttings.

The 2850-5X models are designed for integral systems, where the electronics are attached directly to the sensor.

The preferred installation for in-line applications directs ﬂ ow straight into the electrode. This conﬁ guration reduces the probability of entrapped air bubbles, and provides the best continuous sampling of the ﬂ uid content.

The universal adapter included with 2850-6X models can be attached to the top of a tank or mounted to a surface near the tank.

Adapt the 2850-5X models to tank installations by attaching a clamp to the conduit.

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

An oversized tee or ﬂ ow cell may be helpful for inline installations.

At least 4 threads (ANSI B1.20.1) must be engaged to meet the pressure rating as published in the speciﬁ cations.

Use the 2850-6X models for in-line installations where the electronics must be separated from the electrode.

Conductivity electrodes with sanitary ﬂ ange ﬁ ttings must be installed using this option.

2850 Conductivity/Resistivity Sensor Electronics

+ 8 hidden pages

Georg Fischer 2850 Operating Manual

Specifications and Main Features

Frequently Asked Questions

User Manual