GF Signet 2850 Operating Instructions Manual - User Manual

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

with Universal adapter

3-2850-51, 3-2850-52

with ¾-in. adapter

3-2850-51-XX, 3-2850-52-XX

Integral System

Signet 2850 Conductivity/Resistivity Sensor Electronics

3-2850.090-1 Rev. K 03/15

*3-2850.090-1*

English

Operating Instructions

Description

Table of Contents

Dimensions

•

English

•

Deutsch

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Français

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Italiano

• Signet 2850 Conductivity/Resistivity Sensor Electronics provides either a two-wire

4 to 20 mA output or Digital (S

L) 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

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.

2850-51, -52 Integral mount

2850-61, -62, -63 Universal mount

85 mm

3.34 in.

95 mm

3.74 in.

82 mm

3.24 in.

95 mm

3.74 in.

Description ............................................................................................ 1
Dimensions ........................................................................................... 1
Warranty Information ............................................................................ 2
Product Registration ............................................................................. 2
Safety Information................................................................................. 2
Speci

cations........................................................................................ 2

Conductivity Sensor Dimensions .......................................................... 3
Operating Range Chart......................................................................... 3
In-Line Installation................................................................................. 4
Tank Installation .................................................................................... 4
4 to 20 mA Wiring ................................................................................. 5
Digital (S

L) Wiring ................................................................................ 5

Dual Input Wiring (Dual Digital (S

L) 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 Certi

cation ........................................................................ 10

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

2850 Conductivity/Resistivity Sensor Electronics

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

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

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

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

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

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

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

Max. Loop Resistance .............. 50

@ 12 VDC

325

@ 18 VDC

600

@ 24 VDC

Accuracy ...................................±2% of output span
Resolution.................................7

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.

Speci

cations

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.

Refer to your local Georg Fischer Sales of

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 of

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, chemical poisoning, dry-out) or
mishandling (e.g. broken glass, damaged membrane, freezing
and/or extreme temperatures).

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

Warranty Information

Product Registration

Safety Information

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

rm chemical compatibility before use.

3. Do not exceed maximum temperature/pressure speci

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.

2850 Conductivity/Resistivity Sensor Electronics

Conductivity Sensor Dimensions

Operating Range Chart

1,000

S 10,000

50,000

0.5

S 20

200,000

100

400,000

200

S 100,000

0.055

0.010

2818/2819/2839

2820/2840

2821/2841

2822/2842

2823

Bottled

Water

UPW @ 25°C

USP

Cooling Tower

Waste Waters

Deionization Regen. Chemicals

Alkali Cleaners, Acids/Bases

(0.01 Cell)

(0.10 Cell)

(1.0 Cell)

(10.0 Cell)

(20.0 Cell)

3-2841, 3-2842

26.8 mm

1.13 in.

41.9 mm

1.65 in.

3-2823

203 mm

8.0 in.

89 mm
3.5 in.

3-2839

59.3 mm
2.33 in.

73.7 mm
2.90 in.

3-2840

21.5 mm

0.85 in.

35.8 mm

1.41 in.

3-2819, 3-2820, 3-2821

Sanitary

13 mm
(0.5 in.)

152 mm

(6.0 in.)

126 mm

(5.0 in.)

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

3-2819, 3-2820, 3-2821

2821-x

2820-x

152 mm
(6 in.)

107 mm
(4.2 in.)

¾ in. NPT

4.6 m (15 ft)

cable (std)

12.7 mm

(0.5 in.)

20.3 mm
(0.8 in.)

7.6 mm
(0.3 in.)

49.5 mm
(1.95 in.)

3-2818

32.39 mm

(1.28 in.)

12.7 mm
(0.5 in.)

73.66 mm
(2.9 in.)

41.91 mm
(1.65 in.)

2850 Conductivity/Resistivity Sensor Electronics

Most of the Conductivity/Resistivity electrodes
used with the 2850 can be installed into
standard

in. (NPT or ISO 7-R

)

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

straight into the electrode. This con

guration reduces the

probability of entrapped air bubbles, and provides the best
continuous sampling of the

uid content.

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

ange

ttings must be

installed using this option.

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.

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 ori

ces inside the tee. Mounting upside down

may help prevent air entrapment.

An oversized tee or

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 speci

cations.

In-Line Installation

Tank Installation

2850 Conductivity/Resistivity Sensor Electronics

4 to 20 mA Wiring

Digital (S

L) Wiring

Dual Digital (S

L) Input Wiring

Dual Input is available on Digital (S

L) output

model 3-2850-63 only, for use with the Signet
8900 Multi-Parameter Controller.

Sensors may be the same or different cell
constants.

If the Dual Input model is used with a single
sensor, connect the sensor to Input 1 and set
all of the Input 2 switches to OFF (OPEN).

The Digital (S

L) output is compatible with the

Signet 8900 Multi-Parameter Controller and
the Signet 9900 Transmitter.

Refer to the wiring sections of the 8900 or 9900
manual to determine cable length limitations.

IMPORTANT: Provide Earth Ground as

indicated by

symbol.

Maximum length of 4 to 20 mA loop is 300 meters (1000 ft)

SW1

CTS

4 20

V-

V+

Temp. IN
(WHITE)

Sensr Gnd
(SHIELD)

Signal IN
(RED)

Signal RTN
(BLK)

9 VDC

26 VDC

4-20 mA Loop Output

SW1

CTS

3-8900.621C

I/O Module 3-8900.401-X

+5VDC (Black)

Freq. Input (Red)

GND (Shield)

+5VDC (Black)

Freq. Input 2 (Red)

S L (Red)

GND (White/Shield)

+5VDC (Black)

S L (Red)

GND (White/Shield)

Analog Output 1

Analog Output 2

(if applicable)

Frequency

Input

Frequency

Input 2

S3L

Input

S3L

Input

V+

DA
T

GND

SHLD

V+

DC Power

Loop V

oltage

3-9900.395

H COMM Module

Gnd

Data

Temp. IN
(WHITE)

Sensr Gnd
(SHIELD)

Signal IN
(RED)

Signal RTN
(BLK)

Black

Red

White

9900 S

L Input

SW1

CTS

V+

3-8900.621C

I/O Module 3-8900.401-X

+5VDC (Black)

Freq. Input (Red)

GND (Shield)

+5VDC (Black)

Freq. Input 2 (Red)

S L (Red)

GND (White/Shield)

+5VDC (Black)

S L (Red)

GND (White/Shield)

Analog Output 1

Analog Output 2

(if applicable)

Frequency

Input

Frequency

Input 2

S3L

Input

S3L

Input

Gnd

Data

Input 1

Input 2

Sensor 1

Sensor 2

Note:

The 2819-2823 and 2839-2842 sensors can
connect directly to the 9900 via the 9900's
optional Direct Conductivity/Resistivity
Module 3-9900.394 (159 001 699).

Dual Input applications usually include one sensor with a smaller cell constant and
one sensor with a larger cell constant.

Place the larger cell constant on Input 1.

This allows periodic recalibration of the larger cell by simply turning Input 2 OFF (OPEN).

IMPORTANT

: Provide Earth Ground as indicated by

symbol.

2850 Conductivity/Resistivity Sensor Electronics

NOTE:

To work correctly with the 9900,
the 2850 must be set for the
custom cell constant or the actual
electrode cell constant and the
9900 set for a 1.0 cell constant.

Cell Constant Selection

W
1

SW3

CTS

Input 1

CTS

W
1

SW3

SW4

CTS

Input 1 Input 2

CTS

0.01/cm-1

0.1/cm-1

1.0/cm-1

10.0/cm-1

20.0/cm-1

Closed

Open

Closed

Open

Closed

Open

Closed

Open

Closed

Open

Closed

Open

Custom Cell Constant

CTS

Open

Closed

Open

Closed

1.0 cell constant,

temp comp

Active

1.0 cell constant,

temp comp

Inactive

Examples

NOTE:

Dual Input applications usually include one sensor with a smaller cell constant and one
sensor with a larger cell constant.

Place the larger cell constant on Input 1.

This allows periodic recalibration of the larger cell by simply turning Input 2 OFF (OPEN).

SW3 = Cell Constant and

Temperature Compensation

#1 #2 #3 #4 Cell

Constant

C C C O Custom

C O O O 0.01

-1

O C O O 0.1

-1

C C O O 1.0

-1

O O C O 10.0

-1

C O C O 20.0

-1

#4: (O) Open = Temp Comp

ACTIVE

INACTIVE

SW4 = Cell Constant and Input 2

#1 #2 #3 #4 Cell

Constant

Custom

C O O O 0.01

-1

O C O O 0.1

-1

C C O O 1.0

-1

O O C O 10.0

-1

20.0 cm

-1

#4: (O) Open = Input 2

INACTIVE

ACTIVE

SW3 or SW4

Integral 2850 Systems (Single Input)

• The 2850-51-XX and 2850-52-XX are shipped from the factory with the custom cell

constant and temperature offset programmed into the single-input electronics.

• SW3 will be preset to "Custom cell constant".
• No additional modi

cations are required.

Replacing Integral System Electrode or Electronics

• When installing a new conductivity electrode or replacing System Electronics, the SW3

switches must be con

gured to select the appropriate cell constant.

• See Single Input section above.
• Leaving SW3 in the custom cell constant con

guration will effect accuracy.

• Use calibration standards to calibrate (see page 8).

Dual Input 3-2850-63 Electronics

• Switch banks SW3 and SW4 are used to select the

cell constant of the electrodes.

• Use SW3 #1-3 to select the cell constant for the

rst sensor.

• Use SW3 #4 to disable the PT1000 Temp

Compensation function in the 2850 (as required for
USP applications).
This disables the function for BOTH INPUTS.

• Use SW4 #1-3 to select the cell constant for the

second sensor.

• Set SW4 #4 to OPEN to disable Input 2.
• Recommended:

Make all switch settings before supplying power.
Switch changes made after supplying power will
take 15 to 20 seconds before becoming effective.

Single Input 2850 Electronics
(2850-51, 2850-52, 2850-61, 2850-62)

• Single input models use only SW3.
• Use SW3 #1-3 to select the cell constant for the

rst sensor.

• Use SW3 #4 to disable the PT1000 Temp

Compensation function in the 2850 (as required for
USP applications).

• Recommended:

Make all switch settings before supplying power.
Switch changes made after supplying power will
take 15 to 20 seconds before becoming effective.

2850 Conductivity/Resistivity Sensor Electronics

• The Range selection switch bank (SW2) provides eight range

selections for each cell constant.

• Each range can be inverted, making a total of 16 range options.
• Select a range from the table below and set SW2 as indicated.

Example (refer to shaded selections of chart):

• The electrode installed is the 3-2840-1, with a 0.10 cell constant.
• The required output is 4 to 20 mA = 0 to 100

• Set SW2 switch bank to C-C-O-O.
• To invert range (4 to 20 mA = 100 to 0

S), close switch #4.

SW1

SW2

SW3

CTS

SW2 Switch Setting

0.01 Cell

0.10 Cell

1.0 Cell

10.0 Cell

20.0 Cell

Resistivity Ranges in

BOLD

10 to 20 M

0 to 2

0 to 20

0 to 200

0 to 400

20 to 10 M

2 to 0

20 to 0

200 to 0

400 to 0

2 to 10 M

0 to 5

0 to 50

0 to 500

0 to 1000

10 to 2 M

5 to 0

50 to 0

500 to 0

1 000 to 0

0 to 2 M

0 to 10

0 to 100

0 to 1 000

0 to 2 000

2 to 0 M

10 to 0

100 to 0

1 000 to 0

2 000 to 0

0 to 1

0 to 50

0 to 500

0 to 5 000

0 to 10 000

1 to 0

50 to 0

500 to 0

5 000 to 0

10 000 to 0

0 to 5

0 to 100

0 to 1 000

0 to 10 000

0 to 20 000

5 to 0

100 to 0

1 000 to 0

10 000 to 0

20 000 to 0

0 to 10

0 to 200

0 to 2 000

0 to 50 000

0 to 100 000

10 to 0

200 to 0

2 000 to 0

50 000 to 0

100 000 to 0

0 to 50

0 to 500

0 to 5 000

0 to 100 000

0 to 200 000

50 to 0

500 to 0

5 000 to 0

100 000 to 0

200 000 to 0

0 to 100

0 to 1 000

0 to 10 000

0 to 200 000

0 to 400 000

100 to 0

1000 to 0

10 000 to 0

200 000 to 0

400 000 to 0

Range Selection for 4 to 20 mA Output

(O) Open = 4 to 20 mA
(C) Closed = 20 to 4 mA

Switch #4 inverts the loop output range

NOTE:

2850 Conductivity/Resistivity Sensor Electronics

EasyCal is a single-point calibration system.

During this procedure, if the measured value is within ±10% of any of the test

values listed below, the 2850 will automatically recognize the test value and calibrate the output to that value.

NOTE:

The

rst step (Reset) is recommended each time an electrode is replaced, but is NOT necessary upon initial installation or

periodic calibration.

1. Reset

the 2850 Sensor to factory calibration: Set all switches on SW3 (and SW4 for Dual Input) to OPEN. Apply power, wait

at least 3 seconds, then press and hold SW1 until the LED (D3) comes on steady then goes off again (approx. 10 seconds).
When the LED goes off, release SW1; reset is complete. Reset SW3 and SW4 to the proper settings.

2. Place

the electrode/sensor assembly into the conductivity test solution appropriate to your operating range. Shake the

electrode to dislodge any air bubbles visible on the surface of the electrode.

• 146.93

S, 1408.8

S, 12856

S (per ASTM D1125-95)

• 10

S, 100

S, 200

S, 500

S, 1000

S, 5000

S, 10,000

S, 50,000

S, 100,000

Allow at least 2 minutes for the electrode response to stabilize.

3. Press

and hold SW1 for approximately 8 to 10 seconds. During this time, the LED will come on steady then go back off.

(If the LED blinks several times rapidly, the calibration was not successful. See the troubleshooting section).

Calibration is complete. Return the system to service.

EasyCal

Dual Input Calibration

Dual Input 3-2850-63 Electronics

• The 2850-63 can only be calibrated if both inputs are used, or if Input 2 is disabled.

• To disable Input 2: Set SW4, #4 to OPEN.

• Place each sensor into a test solution that represents the operating range of that sensor. When SW1 is pressed, the 2850 will

calibrate both inputs simultaneously.

• Dual Input applications usually include one sensor with a smaller cell constant and one sensor with a larger cell constant.

Place the larger cell constant on Input 1

. This allows periodic recalibration of the larger cell by simply turning Input 2 OFF (OPEN).

Calibration

• All 2850 Conductivity/Resistivity Sensor Electronics are factory calibrated for maximum out-of-the-box accuracy.
• The EasyCal feature allows calibration to be performed at the sensor.

a. SW2: 4 to 20 mA output range selection switch bank
b. Power and Output terminal block: 4 to 20 mA or

Digital (S

L) Outputs

c. SW3 and SW4: Electrode Cell Constant selection

switch banks

d. D3: LED indicator
e. SW1: EasyCal Push-button
f.

Input 1 & Input 2: Conductivity Electrode connections

SW1

SW2

SW3

SW4

CTS

Input 1

Input 2

The 2839-2842 Conductivity sensors come with a certi

cate

of calibration. This certi

cate provides information regarding

the actual cell constant and temperature offset as tested and
veri

ed according to NIST standards. This information has

been programmed into the 2850 electronics as its default
factory value. If required, the sensor can be recerti

ed by

contacting the GF Signet repair department.

NOTE:

When the electrode is changed from its original factory
provided electrode or the application requires a cell constant
change, reset SW3 or SW4 switches (see page 6).
Then perform a wet calibration with calibration standards.

2850 Conductivity/Resistivity Sensor Electronics

Maintenance

Troubleshooting

The 2850 requires no periodic maintenance.

• Coatings on the electrode may cause slow response or drift.
• Clean metallic surfaces with a mild detergent and a non-abrasive brush or cotton swab.

LED and Output Condition

Possible Causes

Suggested Solutions

Current Out:
LED off, current output is 22 mA

L) out: "Check Sensor"

• SW3 and SW4 set to all OPEN

(factory setting).

•  No electrode installed.
•  SW3 (and SW4) not set correctly.
•  System not ready.

•  Normal for new system.
• Install electrode.
•  Set SW3 and SW4 correctly.
•  Retry (recycle power).

During EasyCal, the LED blinks
rapidly for 4 seconds.

• Measured value of the test solution is

outside the ±10% tolerance.

• The electronics or the electrode is

defective.

• Use fresh test solutions and restart

the calibration.

• Replace the electronics or the

electrode.

After completing calibration
procedure, the output values are
inaccurate.

• Insuf

cient time allowed for electrode

stabilization during calibration procedure.

• Test solutions are contaminated.
• EasyCal performed with temp comp

Inactive, then temp comp Active for
measurement. (or vice versa)

• Recalibrate and wait at least 2

minutes after placing electrode in
solution before pressing SW1.

• Use fresh test solutions and restart

the calibration.

The output of the 2850 indicates a
value that is off by a factor of 10
(e.g. 10x, 100x the correct value)

• The cell constant selection on the

2850 (SW3 or SW4) does not match
the actual input.

• Match the 2850 switch settings to

agree with the sensor being used.

2850 Conductivity/Resistivity Sensor Electronics

Signet offers conductivity simulators in

ve different values. These tools enable the user to validate the performance of the

electronics independently of the electrode. This requirement is de

ned by ASTM D 1125-95 (Standard Test Methods for Electrical

Conductivity and Resistivity of Water) which is commonly used for USP 24 applications.

3-2850.101-1 (159 001 392)

1.0

S ±0.1%

3-2850.101-2 (159 001 393)

2.5

S ±0.1%

3-2850.101-3 (159 001 394)

10.0

S ±0.1%

3-2850.101-4 (159 001 395)

18.2 M

±0.1%

3-2850.101-5 (159 001 396)

10.0 M

±0.1%

Before using the Simulator:

Before using the simulators, disconnect all electrodes and reset the 2850 Electronics to factory calibration:
1.  Set all switches on SW3 (and SW4 for Dual Input) to OPEN. Turn the power on, wait at least 3 seconds
2.  Press and hold SW1 until the LED (D3) comes on steady then goes off again (approx. 10 seconds).
3.  When the LED goes off, release SW1. Reset is complete.

To validate Input 1:

1.  Turn the power off.
2.  Set SW3 to accept a 0.01 cell constant. Leave SW4 in the all-OPEN position.
3.  Install the simulator into the 2850 at the Input 1 conductivity electrode terminals.
4.  Connect the 2850 output terminals to the appropriate display instrument. Turn the power on.

•  The display should indicate a conductivity value within ±2% of the simulator value.
•  If the output is x10 or x100 of the correct value, recheck step 2. The 2850 is not set to accept a 0.01 cell constant.
•  If the correct value is displayed, the electronics are calibrated to ASTM D 1125 speci

cations. Remove the simulator and

reset SW3 to the correct cell constant before reinstalling the electrode.

• If the correct value is not displayed, contact the factory.

To validate Input 2:

1.  Turn the power off.
2.  Set SW4 to accept a 0.01 cell constant.
3.  Install the simulator into the 2850 at the Input 2 conductivity electrode terminals.
4.  Set SW3 switches to the all-OPEN position.
5.  Turn the power on and repeat step 4.

Remember

to reset all switches to their correct position before resuming normal operation.

Cond. - Resist.

Simulator

@ 25°C

For use with Signet

2850 Conductivity

NIST Traceable

Electronic Certi

cation

2850 Conductivity/Resistivity Sensor Electronics

Notes

Georg Fischer Signet LLC, 3401 Aero Jet Avenue, El Monte, CA 91731-2882 U.S.A. • Tel. (626) 571-2770 • Fax (626) 573-2057
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3-2850.090-1 Rev. K 03/15 English

Signet 2850 Conductivity/Resistivity Sensor Electronics

*All versions include EasyCal

Mfr. Part No.

Code

Description

3-2850-51

159 001 398

2850 Sensor Electronics with Digital (S

L) Output and ¾ inch adapter

3-2850-52

159 001 399

2850 Sensor Electronics with 4 to 20 mA Output and ¾ inch adapter

3-2850-61

159 001 400

2850 Sensor Electronics with Digital (S

L) Output and Universal adapter

3-2850-62

159 001 401

2850 Sensor Electronics with 4 to 20 mA Output and Universal adapter

3-2850-63

159 001 402

2850 Sensor Electronics with Dual Inputs, Dual Digital (S

L) Outputs and Universal adapter

(for use with 8900 only)

3-2850-51-39

159 001 339

Integral 2850 system, Digital (S

L) output, 0.01 cell, NPT threads

3-2850-51-40

159 001 340

Integral 2850 system, Digital (S

L) output, 0.1 cell, NPT threads

3-2850-51-41

159 001 341

Integral 2850 system, Digital (S

L) output, 1.0 cell, NPT threads

3-2850-51-42

159 001 342

Integral 2850 system, Digital (S

L) output, 10.0 cell, NPT threads

3-2850-51-39D

159 001 343

Integral 2850 system, Digital (S

L) output, 0.01 cell, ISO threads

3-2850-51-40D

159 001 344

Integral 2850 system, Digital (S

L) output, 0.1 cell, ISO threads

3-2850-51-41D

159 001 345

Integral 2850 system, Digital (S

L) output, 1.0 cell, ISO threads

3-2850-51-42D

159 001 346

Integral 2850 system, Digital (S

L) output, 10.0 cell, ISO threads

3-2850-52-39

159 001 347

Integral 2850 system, 4 to 20 mA output, 0.01 cell, NPT threads

3-2850-52-40

159 001 348

Integral 2850 system, 4 to 20 mA output, 0.1 cell, NPT threads

3-2850-52-41

159 001 349

Integral 2850 system, 4 to 20 mA output, 1.0 cell, NPT threads

3-2850-52-42

159 001 350

Integral 2850 system, 4 to 20 mA output, 10.0 cell, NPT threads

3-2850-52-39D

159 001 351

Integral 2850 system, 4 to 20 mA output, 0.01 cell, ISO threads

3-2850-52-40D

159 001 352

Integral 2850 system, 4 to 20 mA output, 0.1 cell, ISO threads

3-2850-52-41D

159 001 353

Integral 2850 system, 4 to 20 mA output, 1.0 cell, ISO threads

3-2850-52-42D

159 001 354

Integral 2850 system, 4 to 20 mA output, 10.0 cell, ISO threads

Parts and Accessories

3-9000.392-1

159 000 839

Liquid-tight connector kit, 1 set,

in. NPT

3-9000.392-2

159 000 841

Liquid-tight connector kit, 1 set, PG 13.5

3-2850.101-1

159 001 392

Plug-in NIST-traceable recerti

cation tool, 1.0

3-2850.101-2

159 001 393

Plug-in NIST-traceable recerti

cation tool, 2.5

3-2850.101-3

159 001 394

Plug-in NIST-traceable recerti

cation tool, 10.0

3-2850.101-4

159 001 395

Plug-in NIST-traceable recerti

cation tool, 18.2 M

3-2850.101-5

159 001 396

Plug-in NIST-traceable recerti

cation tool, 10.0 M

Ordering Information

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