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SIDE VIEW

Field Mount w/
8052 Integral kit

92 mm
(3.6 in.)

97 mm

(3.8 in.)

56 mm 
(2.2 in.)

41 mm 
(1.6 in.

)

Optional
Rear
Cover

Panel Mount

SIDE VIEW

FRONT VIEW

96 mm

(3.8 in.)

96 mm
(3.8 in.)

Field Mount &

Panel Mount

SIDE VIEW

Field Mount w/
8050 Universal base

106 mm (4.2 in.)

42 mm 

(1.7 in.)

64 mm 

(2.5 in.)

82 mm
(3.23 in.)

   8050

96 mm

(3.8 in.)

107 mm (4.2 in.)

42 mm 

(1.7 in.)

65 mm 

(2.5 in.)

   8052

Signet 8850-3 Conductivity/Resistivity Transmitter

2.  Specifi cations

General

Compatible electrodes:  Signet 3-28XX-1 Standard and Certi

fi

 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 seconds

Electrical

•  Power:  12 to 24 VDC ±10%, regulated, 100 mA max.
Sensor input range:  
•  Conductivity:  0.01 

μ

S/cm to 400 000 

μ

S/cm

•  Resistivity:   

10 K

•cm to 100 M

•cm

•  TDS: 0.023 to 200 000 PPM nominal (adjustable 

μ

S/PPM)

•  Temperature: 

PT 1000, -25 °C to 120 °C (-13 °F to 248 °F)

 

Measurements above 10 M

 (below  0.1 

μ

S) must be performed 

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

Two 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 

 max. @ 12 V

 

   

325 

 max. @ 18 V

 

   

600 

 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 or Low with adjustable hysteresis

 

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

Environmental

Operating Temperature: 

-10 °C to 70 °C (14 °F to 158 °F)

Storage Tmperature: 

-15 °C to 80 °C (5 °F 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
•  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)

 

Declaration of Conformity according to FCC Part 15

 

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.

Signet 

Conductivity/Resistivity

Transmitter

ENTER

62.50 uS/cm

25.0 C

CAUTION!

•    Remove power to unit before wiring 

input and output connections.

•    Follow instructions carefully to avoid 

personal injury.

Contents

1. Installation
2. Speci

fi

 cations

3. Electrical Connections
4. Menu Functions

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.

3-8850.090-3   

Rev. K 11/12 

 

English

*3-8850.090-3*

English

Summary of Contents for Signet 8850-3

Page 1: ...Maximum Altitude 2000 m 6562 ft Insulation Category II Pollution Degree 2 Standards and Approvals CE UL listed Manufactured under ISO 9001 for Quality ISO 14001 for Environmental Management and OHSAS...

Page 2: ...rocedure 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 containi...

Page 3: ...Recorder Channel 3 4 to 20 mA in Channel 4 4 to 20 mA in Transmitter 1 Terminals Transmitter 2 Terminals PLC Terminals Channel 1 4 to 20 mA Power Supply 12 to 24 VDC Channel 2 4 to 20 mA Channel 2 4 t...

Page 4: ...mple 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...

Page 5: ...OWN keys in sequence After entering the Key Code the display will show the first item in the selected menu Step 3 Scroll menu with UP or DOWN arrow keys Step 4 Press RIGHT ARROW key to select menu ite...

Page 6: ...ct the source for the Open Collector output Conductivity or Temperature Select the mode of operation for the Open Collector output Options available are High Low or proportional Pulse The signal may b...

Page 7: ...riences frequent or extreme fluctuations Adjust the minimum and maximum current output The display value represents the precise current output Adjustment limits 3 80 mA 4 00 mA 5 00 mA 19 00 mA 20 00...

Page 8: ...t value If the instrument does not display the correct value Temperature 0 5 C Conductivity 2 of reading service is required A Accuracy Verification with Precision Resistors Electronic Calibration 1 S...

Page 9: ...ture compensation factor by entering 0 00 2 Heat the sample solution close to the maximum process temperature Place sensor in the sample solution allowing several minutes for stabilization Access the...

Page 10: ...k sensor for correct range Check Decimal setting in OPTIONS menu Check Calibrate menu settings for incompatible SOURCE and RANGE values Set a PPM value less than 3 Set cell constant to a value greater...

Page 11: ...11 8850 3 Conductivity Resistivity Transmitter Notes...

Page 12: ...4 Universal mounting kit 3 8050 395 159 000 186 Splashproof rear cover 3 8052 159 000 188 3 4 Integral mounting kit 3 8052 1 159 000 755 3 4 NPT mount junction box 3 0000 596 159 000 641 Heavy duty wa...

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