Xylem WQ User Manual

Global Water

800-876-1172 • globalw.com

Global Water

Instrumentation, Inc.

151 Graham Road

P.O. Box 9010

College Station, TX 77842-9010

T: 800-876-1172

Int’l: [phone], Fax: [phone]

E-mail : [e-mail]

Conductivity Sensor WQ-COND-1 0-200uS WQ-COND-2 200-2000uS WQ-COND-3 2-20mS WQ-COND-4 20-200mS WQ-COND-5 200-2000mS

02-059
Publication Number 38880512

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Global Water

800-876-1172 • globalw.com

Congratulations on your purchase of the Global Water WQ-COND
Conductivity Sensor. This instrument has been quality tested and
approved for providing accurate and reliable conductivity and
temperature measurements. We are confident that you will find
this product to be a valuable asset for your application. Should
you require assistance, our technical staff will be happy to help.

Table of Contents

I. Overview • • • • • • Page 3
II. Sensor Specifications • • • • • 4
III. Maintenance • • • • • • 5
IV. Troubleshooting • • • • • 5
V. Warranty • • • • • • • 6

Copyright  Global Water Instrumentation, Inc. 2012

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I. Overview

The Global Water WQ-COND Conductivity S ensor is s uitable for measuring
conductivity in a wide variety of applic ations including laboratories, str eam s ,
rivers, and groundwater. It’s small size and r ugged hous ing make it useful for
hand held measurements or permanent installation.

The sensor uses a 4-electrode measuring technique t hat provides accurate
readings over a wide range of conductivities and temperatures. Bec aus e the
conductivity of ionic solutions inc r eas es with increasing temperature, a
temperature sensor is also incorporated and is us ed to provide automatic
temperature compensation of 2%/ºC normaliz ed to 25ºC. An in-line interface
module converts the digital conductiv ity and temperature data into two
separate 4-20mA signals for monitoring with data loggers and PLC devic es .

The standard sensor comes with one m eter of cable between the sensor and
interface module, and 25 feet of marine grade cable for connecting to
recording devices. Additional cable can extend the length up to 1000 feet.
Available conductivity ranges are 0-200uS/cm, 200-2000uS/cm, 2-20mS/cm,
20-200mS/cm and 200-2000mS/cm. The temperature output has a
measurement range of -5ºC to +70ºC.

Global Water

800-876-1172 • globalw.com

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Global Water

800-876-1172 • globalw.com

II. Sensor Specifications

a. Specifications.

Output Type: Two 4-20mA outputs

Accuracy: Conductivity: +/-0.5% of Reading
Temperature: +/-0.2ºC (0.4ºF)
Cond. Range/Resolution 0-200uS 0.1uS
200-2000uS 1uS
2-20mS 0.01mS
20-200mS 0.1mS
200-2000mS 1mS
Temp. Range/Resolution -5ºC to +70ºC 0.01ºC
+23ºF to +158ºF 0.02ºF
Pressure: 35 psi maximum (25m/82ft H
Immersion Depth 36mm (1.4 inches)
Voltage Requirements: 10-36 VDC
Supply Current: 20ma plus sum of both 4-20mA outputs
Warm Up Time: 15 seconds recommended
Temperature Response: 99% in <20 Seconds
Operating Temperature: -5°C to +70°C (23º to 158ºF)
Storage Temperature: -20°C to +100°C (-4º to 212ºF)
Dimensions: 0.86” (22mm ) diameter x 8” (202mm) long
Weight: 8oz plus cable

2O)

b. Connections:

Red: 10-36 VDC
Black: Ground
White: 4-20 mA Conductivity Output
Green: 4-20 mA Temperature Output

Warning: Always turn off the power when connecting or dis c onnec ting
the sensor or it could be dam aged.

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Global Water

800-876-1172 • globalw.com

III. Maintenance

Clean the sensor before use, especially when m eas ur ing low c onduc tivity
solutions. The power should be disconnected before cleaning.

For cleaning mineral deposits, immerse the sensor in acetic acid for 5
minutes. Other types of contamination suc h dir t and oil can be cleaned using
mild soapy water.

Normally the conductivity sensor does not age and will not require periodic
calibration. Measuring strong acids, bases or organic solvents can
considerably reduce the sensor’s lifetime or cause permanent damage. Long
term exposure to very high temperatures may also damage it . These types of
damage are not covered under warrantee.

IV. Trouble Shooting

There are no user service able parts inside this sensor

Issue: Sens or reading incorrectly

a. Check all connections
b. Inspect the cable for damage
c. Check that the supply volt age is within specifications
d. Make sure the conductivity and temperature of the solution is wit hin

the measurement ranges of the sensor

e. Clean the sensor according to the guidelines described in the

Maintenance section

f. Ensure that the minimum immersion dept h is maint ained or inc or r ec t

conductivity and/or temperature r eadings c an r es ult

Technical Support

a. Call us for technical support: 800-876-1172 or [phone] (many

problems can be solved over the phone). Fax: [phone] or
Email: [e-mail].

b. In the event that the equipment needs to be returned to the fact or y f or

any reason, please call to obtain a RMA # (Return Mater ial

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Global Water

800-876-1172 • globalw.com

Authorization). Do not return items without a RMA # displayed on the
outside of the package.

Before returning, clean and decontaminate the sensor if necessary.
Include a written statement describing the problems.
Send the package with shipping prepaid to G lobal Water’s factory

address. Insure the shipment, as the war r anty does not cover damage
incurred during transit.

c. When calling for tech s upport, please have as much of the following

information as possible;

1. Model #.

2. Unit serial number.

3. P.O.# the equipment was purchased on.

4. Global Water’s sales number or the invoice number.

5. Repair instructions and/or specific problems relating to the
product.

V. Warranty

a. Global Water Instrumentation, Inc. warrants that its pr oduc ts are free

from defects in material and workmanship under normal use and
service for a period of one year from dat e of shipment from factory.
Global Water’s obligations under this w ar r anty are limited to, at Global
Water’s option: (I) replacing or (II) repairing; any products determined
to be defective. In no case shall Global Water ’s liability exceed the
products original purchase price. This w ar r anty does not apply to any
equipment that has been repaired or altered, ex c ept by Global Water
Instrumentation, Inc., or which has been s ubjec t to misuse, negligence
or accident.

b. The warranty begins on the date of the produc t’s invoice.

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