2
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
μ
S
EasyCal
Automatic recognition of the following conductivity values:
• 146.93
μ
S, 1408.8
μ
S, 12856
μ
S (@ 25 °C)
(Test solutions per ASTM D1125-95)
• 10
μ
S, 100
μ
S, 200
μ
S, 500
μ
S, 1000
μ
S, 5000
μ
S, 10,000
μ
S,
50,000
μ
S, 100,000
μ
S (@ 25 °C)
Power
• 12 to 24 VDC (4 to 20 mA output)
• 5 VDC ±5% regulated, 3.0 mA max. for Digital (S
3
L) output
(Reverse polarity and short circuit protected)
Digital (S
3
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
μ
S
• 0.10 cell (2820, 2840) ...........4 to 20 mA = 0 to 1000
μ
S
• 1.0 cell (2821, 2841) .............4 to 20 mA = 0 to 10,000
μ
S
• 10.0 cell (2822, 2842) ...........4 to 20 mA = 0 to 200,000
μ
S
• 20.0 cell (2823) .....................4 to 20 mA = 0 to 400,000
μ
S
Max. Loop Resistance .............. 50
Ω
@ 12 VDC
325
Ω
@ 18 VDC
600
Ω
@ 24 VDC
Accuracy ...................................±2% of output span
Resolution.................................7
μ
A
Update Rate .............................<600 ms
Error Indication .........................22 mA
Available data via Digital (S
3
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
fi
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
fi
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
fi
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
fi
rm chemical compatibility before use.
3. Do not exceed maximum temperature/pressure speci
fi
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.
