Seametrics INW CT2X Instructions Manual

Download

Page 1

INW CT2X

Conductivity Smart Sensor

and Data Logger Instructions

For PSIG

sensors, refer

to page 21

regarding

desiccant

use!

PROUDLY MADE IN THE

USA

ISO

9001:2008

Page 2

CT2X INSTRUCTIONS

Seametrics • 253.872.0284 Page 2 inwusa.com

Page 3

TABLE OF CONTENTS

General Information

General Information ...................................................................................................................................................Page 4

Dimensions ....................................................................................................................................................................Page 4

Specications ................................................................................................................................................................Page 5

Initial Inspection and Handling ..............................................................................................................................Page 6

Do’s and Don’ts ............................................................................................................................................................Page 6

Installation

Connecting External Power ......................................................................................................................................Page 7

Connecting a CT2X to a Computer .......................................................................................................................Page 7

Cable Wiring ..................................................................................................................................................................Page 8

Installing Aqua4Plus or Aqua4Plus Lite Software ...........................................................................................Page 8

Using Without Aqua4Plus or Aqua4Plus Lite Software ................................................................................Page 9

Installing the Sensor ...................................................................................................................................................Page 9

Desiccant Use ................................................................................................................................................................Page 9

Grounding Issues .........................................................................................................................................................Page 9

Settings and Calibration

General Settings and Calibration Information .................................................................................................Page 10

Conductivity Channel .................................................................................................................................................Page 10

Pressure Channel .........................................................................................................................................................Page 12

Depth/Submergence ........................................................................................................................................Page 13

Depth-to-Water ..................................................................................................................................................Page 13

Elevation Above Sea Level ..............................................................................................................................Page 14

Staff Gauge ...........................................................................................................................................................Page 14

Operation

Collecting Data with Aqua4Plus and Aqua4Plus Lite ....................................................................................Page 15

Real Time Monitor .......................................................................................................................................................Page 15

Setting up Data Recording .......................................................................................................................................Page 15

Retrieving Data .............................................................................................................................................................Page 15

Viewing Data .................................................................................................................................................................Page 15

Exporting Data ..............................................................................................................................................................Page 16

A Word about Units ....................................................................................................................................................Page 16

Direct Read Modbus/SDI-12

Setting Units for Direct Read ..................................................................................................................................Page 16

Power Consideration ..................................................................................................................................................Page 17

Reading via Modbus RTU .........................................................................................................................................Page 17

Reading via SDI-12 ......................................................................................................................................................Page 18

Maintenance

Desiccant Tubes ............................................................................................................................................................Page 21

Removing Debris from End Cone ..........................................................................................................................Page 21

Sensor/Cable/End Connections .............................................................................................................................Page 21

Changing Batteries ......................................................................................................................................................Page 22

Troubleshooting

Problems/Probable Causes/Things to Try ..........................................................................................................Page 25

CT2X INSTRUCTIONS

IF USING ALKALINE BATTERIES—PREVENT BATTERY LEAKAGE!

CT2X sensors are typically shipped with lithium batteries. If, however, you are using alkaline batteries, be aware that under some circumstances alkaline batteries can leak, causing damage to the sensor. To prevent leakage, the following is recommended. (Does not apply to lithium batteries.)

• Change the batteries at least every 12 months.

• If the sensor will not be deployed for 3 months or more, remove the batteries.

Seametrics • 253.872.0284 Page 3 inwusa.com

Page 4

GENERAL INFORMATION

CT2X INSTRUCTIONS

The INW CT2X Smart Sensor is a microprocessor-based submersible conductivity/temperature sensor with builtin data logging. This device stores thousands of records of conductivity, temperature, salinity, and total dissolved solids (TDS). The CT2X is also available with a depth/level option giving added functionality in the same sensor housing.

The CT2X incorporates 4-pole electrode cell measurement technology for conductivity, salinity, and TDS. This

technology reduces fringe eld interference errors,

lessens inaccuracy caused by polarization effects, and lowers contact resistance problems. Four-pole electrode technology also allows users to work with one electrode over a wide range of conductivity. The conductivity element is constructed of epoxy/graphite, making it extremely

durable for use in rugged eld conditions. To clean, simply

scrub with a small brush.

Depth and level is measured with an extremely rugged and stable piezo-electric, media isolated pressure element and compensated for temperature using INW’s proprietary

calibration methodology. Temperature is measured using a borosilicate glass encapsulated thermistor.

The CT2X is powered internally with two AA batteries. Alternately it can be powered with an external auxiliary power supply for data intensive applications. Several CT2Xs, or a combination of CT2Xs and other INW Smart Sensors, can be networked together and controlled from one location, either directly from a single computer or via INW’s Wireless Data Collection System.

While most will use the CT2X with our free, easy-to-use Aqua4Plus Lite or Aqua4Plus software, it is by no means limited to that software. You can use your own Modbus® RTU or SDI-12 software or logging equipment to read measurements, thus tying into your existing systems and data bases.

Dimensions

0.25” (0.6 cm)

Cableless

Shorter

0.28” (0.7 cm)

15.44” (39.2 cm)

Battery Version

11.64” (29.6 cm)

Non-Battery Version

Diameter

0.75” (1.9 cm)

with Pressure:

1.5” (3.8 cm) Longer

Seametrics • 253.872.0284 Page 4 inwusa.com

Page 5

GENERAL INFORMATION

CT2X INSTRUCTIONS

Specications*

Housing & Cable Weight 1.0 lb (0.5 kg)

Body Material Acetal & 316 stainless or titanium Wire Seal

Material Cable Submersible: polyurethane, polyethylene, or ETFE (4 lb/100 ft, 1.8 kg/30 m) Desiccant 1-3 mm indicating silica gel Field Connector Standard

Temperature Operating Range Recommended: -5˚ to 40˚C (23˚ to 104˚F) Requires freeze protection kit if using pressure option in water

Storage Range Without batteries: -40˚ to 80˚C (-40˚ to 176˚F)

Power Internal Battery Two lithium ‘AA’ batteries - Expected battery life: 12 months at 15 minute polling interval (may vary due

Auxiliary Nominal: 12 Vdc, Range: 9–16 Vdc Communication RS485 Modbus® RTU (output = 32-bit IEEE oating point), SDI-12 (ver. 1.3) - ASCII Logging Memory 4MB - 349,000 records

Logging Types Variable, user-dened, proled

Logging Rates 4x/sec maximum, no minimum

Baud Rates 9600, 19200, 38400

Software Complimentary Aqua4Plus and Aqua4Plus Lite

Networking 32 available addresses per junction (Address range: 1 to 255)

File Formats .a4d and .csv (also .xls in Windows 8 and earlier) Output Channels Temperature Depth/Level¹ Conductivity

Element Borosilicate glass

Accuracy ±0.25˚C ±0.05% FSO (typical, static)

Resolution 0.1˚C 0.0034% FS (typical) (32 bit internal) 0.1 µS/cm, 0.001

Units Celsius, Fahrenheit, Kelvin PSI, FtH₂O, inH₂O, mmH₂O, mH₂O,

Range -5˚ to 40˚C (23˚ to 104˚F) Gauge:

Compensated --- 0˚ to 40˚C (32˚ to 104˚F) Thermal: None, Linear, or nLFn

Warmup Time --- --- 200 msec Max operating pressure 1.1 x full scale Over pressure protection 3x full scale up to 100psi—for > 300psi (650 ft or 200 m), contact Seametrics Burst pressure 550 psi (approx. 2000 ft or 600 m) Environmental IP68, NEMA 6P

*Specications subject to change. Please consult our web site for the most current data (inwusa.com). Modbus is a registered trademark of Schneider Electric. Pyrex is a registered trademark of Corning Incorporated. 1 Higher pressure ranges available upon request 2 Accuracy reduced at levels <10 µS/cm and >100,000 µS/cm 3 ±0.25% accuracy FSO (max) at this range 4 Depth range for absolute sensors has 14.7 PSI subtracted to give actual depth allowed.

Fluoropolymer and PTFE

below freezing.

to environmental factors)

encapsulated thermistor 30K ohm thermistor

Silicon strain gauge transducer 316 stainless or Hastelloy

±0.1% FSO (maximum, static)

(B.F.S.L. 20˚C)

inH₂O, cmHg, mmHg, Bars, Bars, kPa

PSI: 1³, 5, 15, 30, 50, 100, 300

FtH₂O: 2.3³, 12, 35, 69, 115, 231, 692 mH₂O: 0.7³, 3.5, 10.5, 21, 35, 70, 210

Absolute4: PSI: 30, 50, 100, 300

FtH₂O: 35, 81, 196, 658 mH₂O: 10, 24, 59, 200

Epoxy/Graphite - 4-pole

Static: ±0.5% of measured value (0–100,000 µS/cm)

mS/cm, 0.1 mg/L (TDS), 0.001 PSU µS/cm, mS/cm, mg/L, PSU

Conductivity²: 0–300,000 µS/cm TDS: 4.9-147,000 mg/L Salinity: 2-42 PSU

Seametrics • 253.872.0284 Page 5 inwusa.com

Page 6

GENERAL INFORMATION

CT2X INSTRUCTIONS

Initial Inspection and Handling

Upon receipt of your smart sensor, inspect the shipping package for damage. If any damage is apparent, note the signs of damage on the appropriate shipping form. After opening the carton, look for concealed damage, such as a cut cable.

If concealed damage is found, immediately le a claim with the carrier.

Check the etched label on the sensor to be sure that the proper range and type were provided. Also check the label attached to the cable at the connector end for the proper cable length.

Do’s and Don’ts

Do handle sensor with care

   

Do store sensor in a dry, inside area when not in use

Do install a desiccant tube if using a gauge sensor

   

Do install sensor so the connector end is kept dry

Don’t drop into well

Lower gently to prevent damage

Seametrics • 253.872.0284 Page 6 inwusa.com

Don’t scrape cable over edge of well

May nick or fray the cable

Don’t bend cable sharply

May close off vent tube and/or weaken internal wires

Don’t support sensor with the connector

Use a strain relief device

Page 7

INSTALLATION

CT2X INSTRUCTIONS

Connecting External Power

The CT2X comes with two 1.5V AA internal batteries.

If auxiliary power is desired, you can use a 9–16 VDC supply that can provide 15 mA. Connect to Vaux+(pin 1 - white) and Ground (pin 5 - blue) or contact INW for auxiliary power supplies.

Connecting the CT2X to a Computer

Cabled sensors are terminated with a weather-resistant connector. Cableless sensors are terminated with a weatherresistant connector that is inside a screw-cap. Connect the weather-resistant connector to your computer’s USB port as shown below.

USB to RS485

Adapter

Screwcap

Sensor

Cableless

Conguration

USB Port

PC or Laptop

Computer

Connecting sensor to your computer using

INW’s USB to RS485 adapter.

Aqua4Plus and Aqua4Plus Lite communicate with the sensor using the USB to RS485 adapter cable. This cable requires drivers to be installed on your computer. If you

are connected to the Internet when you rst plug in the

cable, it will normally obtain and install the correct drivers automatically. If this does not happen, or if you do not have Internet connection, you can use Aqua4Plus or Aqua4Plus Lite to install the drivers. In Aqua4Plus, select Install USB/ RS485 Drivers from the Utilities menu; in Aqua4Plus Lite,

select the same from the Program Conguration menu.

Select your operating system, and then click Install.

Alternate Connection Options

INW recommends connecting the sensor to your computer using the INW USB cable. However, when using Aqua4Plus, the sensor can also be connected using an RS232 serial port or a USB-to-Serial cable, as described below. (Note: Aqua4Plus Lite can only communicate using the INW USB cable.)

Connecting via RS232 Serial Port

Connect the weather-resistant connector to your computer’s serial port as shown below.

Interface Cable

Screwcap

Sensor

Cableless

Conguration

Sensor

RS485/RS232 Adapter

Serial Port

PC or Laptop

Computer

Connecting sensor to your computer using

an RS485/RS232 adapter and an interface cable.

Connecting with a USB/Serial Adapter

USB-to-Serial cables are readily available from many electronics and computer stores, as well as numerous sites on the Internet. INW has tested and recommends the Keyspan USA-19HS. Install as follows:

• Plug into USB port.

• Install the drivers provided with the particular unit.

• Determine the port number to which the adapter is assigned.

• Right-click on My Computer.

• From the popup menu, select Manage to open

the Computer Management window.

• On left panel, click on Device Manager.

• On right panel, double-click on Ports.

• A list of active COM ports will be displayed. Note

the COM number assigned to the adapter you just installed.

For example:

• Close Manager.

• Connect to the sensor.

• On the Aqua4Plus software, select the COM port noted above. (If you do not see your new COM port in the dropdown box, open the Communications dialog box from the Options menu. Increase the Highest COM port number, up to a maximum of

15.)

USB Port

PC or Laptop

Computer

Screwcap

Sensor

Cableless

Conguration

Interface Cable

USB-to-Serial Adapter

RS232/RS485 Adapter

Sensor

Connecting sensor to your computer using

a USB to Serial adapter and an interface cable.

Seametrics • 253.872.0284 Page 7 inwusa.com

Page 8

INSTALLATION

CT2X INSTRUCTIONS

Cable Wiring

If you buy your cabled sensor with a connector installed

(the normal conguration), no further wiring is needed. For reference purposes, the rst three diagrams below

show the pinout from the connector for various scenarios.

The nal diagram shows the pinout if you bought your

sensor without a connector for use with SDI-12.

White Purple Yellow Brown Blue Shield

1 2 3 4 5

5-Pin Connector

12 VDC+ (Vaux) Modbus DModbus D+ Digital I/O (Not used) 12 VDC- (GND)

For Modbus® with rmware lower than 2.0

— with 5-pin connector

White Purple Yellow Brown Blue Shield

1 2 3 4 5

5-Pin Connector

12 VDC+ (Vaux) Modbus DModbus D+ SDI-12 (Not used) 12 VDC- (GND)

For Modbus® with rmware 2.0 or higher

— with 5-pin connector

White Purple Yellow Brown Blue Shield

1 2 3 4 5

5-Pin Connector

12 VDC+ (Vaux) Modbus D- (Not used) Modbus D+ (Not used) SDI-12 Signal 12 VDC- (GND)

For SDI-12 with rmware 2.0 or higher

— with 5-pin connector

White Purple Yellow Brown Blue Shield

12 VDC+ (Vaux) Modbus D- (Not used) Modbus D+ (Not used) SDI-12 Signal 12 VDC- (GND) Earth ground

Installing Aqua4Plus or Aqua4Plus Lite Software

The CT2X comes with the Aqua4Plus or Aqua4Plus Lite host software that is installed on your PC or laptop. Use this software to program the datalogger, to retrieve data from the logger, to view collected data, and to export data

to external les for use with spreadsheets or databases.

Refer to the software manuals for details on installing and using Aqua4Plus or Aqua4Plus Lite.

Setting the Continuous Rate

The CT2X can take readings more often than once per second. This is known as a “continuous rate.” Set the

continuous rate for the CT2X from the Congure Menu |

Sensor Continuous Rate.

To use the continuous rate during recording, enter a “c” or a zero in the Polling Interval on the Logging Schedule.

Selecting Linear or Non-Linear Mode

All conductivity measurements are sensitive to temperature change. The CT2X has built-in temperature compensation to correct for changes in temperature. As a user, you can select either a linear temperature compensation method or a non-linear (nLFn) compensation method.

In the linear mode, a constant temperature coefcient is

applied to the readings. This defaults to 2.1% per degree C, which works well for a wide range of applications. If you

want to use the linear method with a different coefcient, then enter that coefcient in the Temp Coef box on the

Settings and Calibration window.

Natural waters, such as ground water, streams, and rivers, often have a very low conductivity and do not respond to temperature in a linear fashion. For this situation, the CT2X provides a non-linear mode, which uses a complex formula to calculate and apply temperature compensation to the readings. This method meets the DIN EN 27888 standards. If you want to use the non-linear method, checkmark the Non-Linear box on the Settings and Calibration window.

The temperature coefcient box will disappear.

For SDI-12 with rmware 2.0 or higher

— without connector

Seametrics • 253.872.0284 Page 8 inwusa.com

Page 9

INSTALLATION

CT2X INSTRUCTIONS

Using the CT2X Without Aqua4Plus or Aqua4Plus Lite

Most users will use the CT2X with INW’s Aqua4Plus or Aqua4Plus Lite software. However, the CT2X is quite versatile, communicating via either Modbus® or SDI-12 interfaces, allowing you to do the following:

• Read a CT2X via Modbus® using your own software.

• Read a CT2X via SDI-12 protocol.

• Display readings from a CT2X on a panel meter.

If you want to use one of these methods, see the chapter Direct Read Modbus®/SDI-12.

Installing the Sensor

• Lower the sensor to the desired depth1.

• Fasten the cable to the well head using a weather proof strain-relief system. When securing a vented cable, make sure not to pinch the cable too tightly or the vent tube inside the cable jacket may be sealed off.

• Take a measurement to insure the sensor is not installed below its maximum range.

Be sure the supplied cap is securely placed on the weatherresistant connector at the top of the cable. Do not install such that the connector might become submerged with changing weather conditions. The connector can withstand incidental splashing but is not designed to be submerged.

If the sensor has the vented pressure option, install the

sensor so that the desiccant tube will not ood or lie in

water.

The sensor can be installed in any position; however, when it leaves the factory it is tested in the vertical position. Strapping the sensor body with tie wraps or tape will not

hurt it. If the sensor is being installed in a uid environment

other than water, be sure to check the compatibility of the

uid with the wetted parts of the sensor.

1 If your CT2X has the pressure option, then the maximum installation

depth depends on the range of the sensor. One (1) PSI is equal to approximately 2.31 feet of water. If you have a 5 PSI sensor, the range is 11.55 feet of water and the sensor should not be installed at a depth below 11.55 feet. If the sensor is installed below its maximum range, damage may result to the sensor and the output reading will not be correct.

Desiccant Use

On sensors with a vented pressure option, a desiccant tube prevents moisture in the air from being sucked into the vent tube, which can cause erratic readings and sensor damage.

The desiccant tube is lled with blue silica gel beads. A locking barb and a hydrophobic water lter are attached to the end of the desiccant tube. This lter prolongs the life of

the desiccant as much as three times over a desiccant tube

without the lter.

Install the sensor so that the desiccant tube and cable

connector will not ood or lie in water.

The desiccant is a bright blue color when active and dry. See Maintenance section for care and changing of desiccant.

Grounding Issues

It is commonly known that when using electronic equipment, both personnel and equipment need to be protected from high power spikes that may be caused by lightning, power line surges, or faulty equipment. Without

a proper grounding system, a power spike will nd the path

of least resistance to earth ground—whether that path is through sensitive electronic equipment or the person operating the equipment. In order to ensure safety and prevent equipment damage, a grounding system must be used to provide a low resistance path to ground.

When using several pieces of interconnected equipment, each of which may have its own ground, problems with noise, signal interference, and erroneous readings may be noted. This is caused by a condition known as a Ground Loop. Because of natural resistance in the earth between

the grounding points, current can ow between the points,

creating an unexpected voltage difference and resulting erroneous readings.

The single most important step in minimizing a ground loop is to tie all equipment (sensors, dataloggers, external power sources, and any other associated equipment) to a single common grounding point. Seametrics recommends

connecting the shield to ground at the connector end.

Seametrics • 253.872.0284 Page 9 inwusa.com

Page 10

SETTINGS AND CALIBRATION

CT2X INSTRUCTIONS

General Calibration Information

Settings and calibration values can only be changed when there is no data on the sensor. Be sure to retrieve any data and then erase the data on the sensor before proceeding.

Field calibration is performed on each channel separately.

To calibrate a specic channel, select Settings and Conguration from the Congure Menu in Aqua4Plus

(click the Settings button in Aqua4Plus Lite), and then click on the channel to be calibrated.

Step-by-step instructions will be displayed on the right side of the window.

Important!

When performing calibration, be sure that you use the same units for all measurements that you have selected to view in the program, such as µS/cm, mS/cm, psi, feet of water, etc.

The temperature channel rarely needs adjustment. If you think your temperature channel needs calibrating, contact your service representative. The salinity and TDS channels do not need adjustment. They are computed channels based on the conductivity value.

Conductivity Channel

Preparation

— General Preparation —

1. Select the Conductivity channel.

2. Select solutions that are close to the expected conductivity of your samples. If doing a two point calibration, select solutions that bracket the expected conductivity of your samples.

3. Make sure the Non-Linear box is not checked. (If you will be using the nLFn mode for your data collection, check this box again AFTER calibration is complete.)

4. If measuring TDS, enter TDS factor, if other than default of .49.

— If your rmware is earlier than 2.13 —

5. Note the reference temperature on the solution’s packaging. (If you will be using the nLFn mode for your data collection, you must use a solution that has a reference temperature of 25 degrees C.)

6. Select the reference temperature on the calibration window.

7. Enter the Temperature Coefcient (2.1 works for a

wide variety of uids).

Sample Conductivity Setting and Calibration Window

(Numbers refer to steps on this and the next page.)

NOTE ON REFERENCE VALUES: If using calibration solutions, use the

For rmware earlier than

2.13

SPECIFIC CONDUCTANCE value of the solution – do not use a reference chart based on temperature. If using secondary reference equipment, you must have its temperature compensation set to the same as the Temp. Coef. in the Settings and Calibration window.

— If your rmware is 2.13 or later —

NOTE ON REFERENCE VALUES: If using calibration solutions, use the RAW

conductivity value of the solution as your

For rmware

2.13 or later

reference value. Note the current solution temperatures and use solution temperature reference charts to determine the values. (See charts for 1413 uS/cm and 12,880 uS/ cm in the instruction box on the Settings and Calibration window.) If using secondary reference equipment, you must have its temperature compensation set zero.

Seametrics • 253.872.0284 Page 10 inwusa.com

Page 11

SETTINGS AND CALIBRATION

Conductivity Calibration

One-Point Calibration

CT2X INSTRUCTIONS

Two-Point Calibration

— Compute Calibration Value —

• Rinse sensor rst with distilled water and then with a small amount of the solution.

• Dry with clean paper towel and cotton swab.

• Place sensor in solution.

• Make sure there are no bubbles in the conductivity slot.

• Allow time for sensor to stabilize.

• Enter the reference value the Ref box (#8) for the rst point. (See NOTE in preparation section!)

• Click rst Measure button (#9).

• When readings have stabilized to your satisfaction, click the OK button in the pop-up box.

— Applying Calibration Value —

• Click the Apply button (#12) to apply calibration value.

• The computed b value will be transferred to the

calibration eld.

• Click OK (#13) to save the value to the sensor.

— Verifying Settings —

• Using the Real Time Monitor, take a few readings to verify it is reading as expected.

— Compute First Calibration Point —

• Rinse sensor rst with distilled water and then with a small amount of the lower solution.

• Dry with clean paper towel and cotton swab.

• Place sensor in lower solution.

• Make sure there are no bubbles in the conductivity slot.

• Allow time for sensor to stabilize.

• Enter the rst reference value the Ref box (#8) for the rst point. (See NOTE in preparation section!)

• Click rst Measure button (#9).

• When readings have stabilized to your satisfaction, click the OK button in the pop-up box.

— Compute Second Calibration Point —

• Rinse sensor rst with distilled water and then with a small amount of the higher solution.

• Dry with clean paper towel and cotton swab.

• Place sensor in higher solution.

• Make sure there are no bubbles in the conductivity slot.

• Allow time for sensor to stabilize.

• Enter the second reference value the Ref box (#10) for the second point. (See NOTE in preparation section!)

• Click second Measure button (#11).

• When readings have stabilized to your satisfaction, click the OK button in the pop-up box.

— Applying Calibration Values —

• Click the Apply button (#12) to apply calibration values.

• The computed m and b values will be transferred to the

calibration elds.

• Click OK (#13) to save the values to the sensor.

— Verifying Settings —

• Using the Real Time Monitor, take a few readings to verify it is reading as expected.

Seametrics • 253.872.0284 Page 11 inwusa.com

Page 12

SETTINGS AND CALIBRATION

Pressure Channel

Before leaving the factory, your CT2X has been inspected using precision instruments. However, you may want to change some of the settings for the pressure channel for the following reasons:

• To set a specic zero-reference point for submergence

• To return values as depth-to-water

• To return values as elevation in relation to sea-level

• To return values relative to a staff gauge

Basic Pressure Calibration Process

The basic setting/calibration process for the pressure channel is as follows.

1. Select the Pressure channel.

2. Enter a Channel Label, if desired.

3. Select the desired type of setting. A picture will display illustrating the type of selection. Available types:

• Depth/Submergence

• Depth-to-Water

• Elevation

• Staff Gauge

4. Supply any requested information.

5. Within the Calculator, supply any requested information.

6. Click the Measure button to get a current measurement from the sensor.

(Two-point calibrations require a second reference value and clicking of the second Measure button— not shown in diagram.)

7. Click the Apply button to accept the new slope and offset.

8. Click the OK button, to save your changes to the sensor.

CT2X INSTRUCTIONS

Sample Pressure Setting and Calibration Window

Your window may vary, depending on options selected.

(Numbers refer to steps on this and the next page.)

See following pages for detailed instructions for Depth/ Submergence settings, Depth-to-Water settings, Elevation settings, and Staff Gauge settings..

Seametrics • 253.872.0284 Page 12 inwusa.com

Page 13

SETTINGS AND CALIBRATION

CT2X INSTRUCTIONS

Depth/Submergence

One-Point Calibration

— Computing Offset —

• Place sensor in the uid you are measuring at a precise

known level.

• In the Ref box (#5) for the rst point, enter this level or

pressure.

• Click rst Measure button (#6).

• When readings have stabilized, click the Accept button in

the pop-up box.

— Applying Offset —

• Click the Apply button (#7) to apply calculated offset.

• The calculated offset will be transferred to the offset eld

near the top of the window.

• Click OK (#8) to save the value to the sensor!!!

— Verifying Settings —

• Using the Real Time Monitor, take a few readings to verify

it is reading as expected.

Two-Point Calibration

— Compute First Calibration Point —

• Place sensor in the uid you are measuring at a precise

known level.

• In the Ref box (#5) for the rst point, enter this level or

pressure.

• Click rst Measure button (#6).

• When readings have stabilized, click the Accept button in

the pop-up box.

— Compute Second Calibration Point —

• Place sensor in the uid you are measuring at a second

precise known level.

• In the Ref box for the second point, enter this level or

pressure.

• Click second Measure button.

• When readings have stabilized, click the Accept button in

the pop-up box.

Depth-to-Water

When using the Depth-to-Water setting, you may want to change the channel label at the top of the Settings window to read “Depth” or “Depth-to-Water”.

— Computing Offset —

• If you are using an absolute sensor, enter the current barometric pressure in the Barometric box (#4).

• Place the sensor in the well.

• Using a water level indicator or other measuring device, determine the depth-to-water from the top of the well (or other reference point).

• Enter this value in the DTW box (#5).

• Click the Measure button (#6).

• When readings have stabilized, click the Accept button in the pop-up box.

— Applying the Slope and Offset —

• Click the Apply button (#7) to apply the calculated values.

• The calculated slope and offset will be transferred to the

elds near the top of the window.

• Click OK (#8) to save the values to the sensor!!!

— Verifying Settings —

• Using the Real Time Monitor, take a few readings to verify it is reading as expected.

IMPORTANT NOTE!

When taking readings on an absolute sensor, you will need to ADD the current barometric

pressure to get depth-to-water.

— Applying Slope and Offset —

• Click the Apply button (#7) to apply calculated values.

• The calculated slope and offset will be transferred to the

elds near the top of the window.

• Click OK (#8) to save the value to the sensor!!!

— Verifying Settings —

• Using the Real Time Monitor, take a few readings to verify it is reading as expected.

IMPORTANT NOTE!

When taking readings on an absolute sensor, you will need to SUBTRACT the current barometric pressure to get submergence.

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Page 14

SETTINGS AND CALIBRATION

CT2X INSTRUCTIONS

Elevation Above Sea Level

When using the Elevation setting, you may want to change the channel label at the top of the Settings window to read “Elevation”.

— Computing Offset —

• Enter the elevation of the top of the well (or other reference point).

• If using an absolute sensor, enter the current barometric pressure in the Barometric box (#4).

• Place the sensor in the well.

• Using a water level indicator or other measuring device, determine the depth-to-water from the top of the well (or other reference point).

• Enter this value in the DTW box (#5).

• Click the Measure button (#6).

• When readings have stabilized, click the Accept button in the pop-up box.

— Applying Offset —

• Click the Apply button (#7) to apply the calculated offset.

• The calculated offset will be transferred to the offset eld near the top of the window.

• Click OK (#8) to save the values to the sensor!!!

Staff Gauge

When using the Staff Gauge setting, you may want to change the channel label at the top of the Settings window to read “Staff Gauge”.

— Computing Offset —

• If using an absolute sensor, enter the current barometric pressure in the Barometric box (#4).

• Place the sensor in the well.

• Note the current level on your staff gauge.

• Enter this value in the Staff box (#5).

• Click the Measure button (#6).

• When readings have stabilized, click the Accept button in the pop-up box.

— Applying Offset —

• Click the Apply (#7) button to apply the calculated offset.

• The calculated offset will be transferred to the offset eld near the top of the window.

• Click OK (#8) to save the values to the sensor!!!

— Verifying Settings —

• Using the Real Time Monitor, take a few readings to verify it is reading as expected.

— Verifying Settings —

• Using the Real Time Monitor, take a few readings to verify it is reading as expected.

IMPORTANT NOTE!

When taking readings on an absolute sensor, you will need to SUBTRACT the current barometric pressure to get elevation.

IMPORTANT NOTE!

When taking readings on an absolute sensor, you will need to SUBTRACT the current barometric pressure to get a staff gauge reading.

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Page 15

OPERATION

CT2X INSTRUCTIONS

Collecting Data with Aqua4Plus & Aqua4Plus Lite

Following is a brief overview on using Aqua4Plus/ Aqua4Plus Lite to collect data. Please refer to the software

instruction manuals for further details on conguring and

using Aqua4Plus/Aqua4Plus Lite.

Real Time Monitor

• Click Single to get a single reading.

• Click Start to get a reading once a second for 60 seconds.

• Click Stop to stop the reading.

Note: These are snapshot readings and are not recorded on the sensor.

Retrieving Data from the Sensor/Datalogger

• Click on the le you want to retrieve.

• Click the tool button.

• Select a le location.

• Click Save.

• Click Start.

Select the data le to retrieve.

Viewing Data

• Click the or tool button to view data as a table.

• Click the tool button to view data as a graph.

• Navigate to the desired le, then click the Open button.

The Real Time Monitor gives a snapshot of the

current readings on the sensor.

Setting up Data Recording

Click the tool button. A Logging Schedule Window will open. Refer to the software instruction manuals for details in describing your schedule. Click the Start button to save the schedule to the sensor and begin recording.

Using the Logging Schedule Window, describe the test steps for your particular test.

The File Display window displays your data in

a tabular format.

The Graph window displays your data on an

X Y coordinate graph.

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Page 16

OPERATION/DIRECT READ MODBUS & SDI-12

CT2X INSTRUCTIONS

Exporting Data to .csv or .xls Files*

• Click the or tool button to view data as a table.

• Click on the tool button.

• Select a le location and enter a name for the le.

• Select a le type.

• Click Save.

* When using Windows 10, les can only be exported in .csv format. They can then be opened manually from Excel or any other spreadsheet or

database program

A Word About Units

Readings from the CT2X Smart Sensor can be displayed in various units, such as PSI, Ft. H2O, or mm H2O for pressure, or degrees Celsius or degrees Fahrenheit for temperature.

Select the units you want from the Options | Display Units menu or from the Congure Menu | Program Conguration | Set Computer Display Units.

DIRECT READ (MODBUS® OR SDI-12)

While the CT2X comes with INW’s easy to use Aqua4Plus or Aqua4Plus Lite software, you can also use standard Modbus® RTU or SDI-12 equipment to easily take readings, so as to tie into your existing equipment or networks.

You may need to use Aqua4Plus/Aqua4Plus Lite to make a few settings prior to directly reading the CT2X with your equipment. These might include the units for the returned values and/or the Modbus baud rate. These are described in the following sections.

For Modbus direct read, you must have CT2X rmware 1.5 or higher. For SDI-12, you must have rmware 2.0 or higher.

Setting Units for Direct Read

By default, the CT2X uses the following units:

Temperature Degrees Celsius Conductivity µS/cm Pressure PSI Salinity PSU* TDS mg/L*

*Firmware version 2.8 or higher

If you have rmware 2.2 or later, you can select from a

variety of units. If you want to change to different units, for example, degrees Fahrenheit for temperature or meters of water for pressure, set these units using Aqua4Plus/ Aqua4Plus Lite, as shown below. Note: Conductivity is always returned in µS/cm, Salinity in PSU, and TDS in mg/L.

• From Aqua4Plus select Direct Read Units from the

Congure | Advanced menu.

• From Aqua4Plus Lite select Set Direct Read Units

from the Sensor congure menu.

• On the popup box, click the down-arrows next to the channel types you want to change, and then select the units you want.

• Click OK.

Select the units for your direct read

measurements, whether Modbus or SDI-12.

Once set, these units are saved on the sensor and direct readings, either via Modbus or via SDI-12, will return values using these units. (Note: These settings do not affect the units used on the Aqua4Plus/Aqua4Plus Lite display. Refer to the software instructions for details.)

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Page 17

DIRECT READ MODBUS & SDI-12

CT2X INSTRUCTIONS

Power Consideration

If your sensor does not have internal batteries and is not powered continuously by an auxiliary power supply, then

you must turn power on to the sensor at least ve seconds

before a reading is to be taken to allow the sensor to warm up.

Reading Via Modbus® RTU

Setting Baud Rate

Your CT2X comes congured to communicate at 38,400

baud, with 8 data bits, one stop bit, and no parity. The sensor can also be set to 19,200 or 9600 baud, if needed for your application. You must use Aqua4Plus, not Aqua4Plus Lite, to make baud rate changes.

If needed, set your CT2X to the desired baud rate as follows:

• Click on the Congure menu, and then select Advanced.

• From the yout menu, select Sensor Baud Rate. (You may be asked for a password. Enter admin.)

• On the popup box, click the down-arrow, select the baud rate you need, and then click OK.

Once you have changed the baud rate on the CT2X, you will not be able to talk to it with Aqua4Plus until you change the baud rate for Aqua4Plus, as follows:

Measurement Timing

When you request a reading via Modbus, the sensor wakes up, returns the current values in the registers, and then starts taking new readings and updating the registers. After approximately 10 seconds, if no more readings have been requested, the sensor goes back to sleep.

Because of this, the rst reading you get will be old. If you

are taking readings at intervals of less than 10 seconds,

simply ignore the rst reading — all remaining readings will

be current. On the other hand, if you are taking readings at intervals of greater than 10 seconds, take a reading, ignore it, wait one second, take another reading. Record this second reading.

Data Format

The data is returned as 32-bit IEEE oating-point values, highword rst, also referred to as big-endian or oat

inverse.

For further information and detailed Modbus examples, see INW application note, “Reading INW Smart Sensors Using Modbus RTU” available from our web site at inwusa. com.

• Click the Options menu, and then select Baud Rate.

• On the popup box, click the down-arrow, select the baud rate you need, and then click OK.

The current Aqua4Plus baud rate is displayed in the lower right corner of the main Aqua4Plus window.

Taking Measurements

Reading Registers

Read measurements using Modbus function 03 – Read Holding Registers. Readings are located in two registers each, starting at address 62592. (CT2X register addressing is zero based, i.e., starts at zero. If your equipment uses one based addressing, you will need to add one to the register addresses.)

Zero based One based Temperature 62592 62593 Conductivity (Linear) 62594 62595 Conductivity (nLFn) 62596 62597 Pressure 62598 62599 Salinity* 62600 62601 TDS* 62602 62603

*Firmware version 2.7 or higher

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Page 18

DIRECT READ MODBUS & SDI-12

CT2X INSTRUCTIONS

Reading via SDI-12

Note: The default units setting for pressure is PSI. The default units setting for temperature is Celsius. To change these, use the Direct Read Units in the Aqua4Plus/Aqua4Plus Lite Control Software. Note: Conductivity is always returned in µS/cm, Salinity in PSU, and TDS in mg/L.

Addressing

Default SDI-12 Address: 0

SDI-12 Command Nomenclature

<a> = Sensor address {crc} = SDI-12 compatible 3-character CRC <cr> = ASCII carriage return character

All SDI-12 requests consist of a command followed by a request for values. Some software or equipment may combine these, making the second one unnecessary. Refer to your software or equipment documentation for details.

Request Response

Address

Command

Request Response

Address

Time until

(in seconds)

response

Carriage Return

Linefeed

# of values to

be returned

Carriage Return

Linefeed

<lf> = ASCII line feed character

highlighted values indicate variable data

SDI-12 Commands

Sensor Identication

<a>I! <a>13 INWUSA CT2X 215ssssssssss<cr><lf> Note: 215 will change to reect current

Address

Request for values read

Address

Returned value(s)

rmware version.

ssssssssss = device serial number

Acknowledge Active, Address Query

Change Address

<a>A<b>! <b><cr><lf> Change address to <b>

Request Measurement

<a>M! <a>0024<cr><lf> Request all basic measurements <a>D0! <a>+22.0512+155.0127+155.2155+12.0512<cr><lf> Read: temperature, conductivity (linear),

conductivity (nLFn), pressure

<a>M1! <a>0021<cr><lf> Request temperature measurement only <a>D0! <a>+22.0512<cr><lf> Read temperature

<a>M2! <a>0021<cr><lf> Request linear conductivity measurement only <a>D0! <a>+155.0127<cr><lf> Read linear conductivity

<a>M3! <a>0021<cr><lf> Request nLFn conductivity measurement only <a>D0! <a>+155.0127<cr><lf> Read nLFn conductivity

<a>M4! <a>0021<cr><lf> Request pressure measurement only <a>D0! <a>12.0512<cr><lf> Read pressure

<a>M5! <a>0021<cr><lf> Request salinity measurement only <a>D0! <a>+20.7862<cr><lf> Read salinity

<a>M6! <a>0021<cr><lf> Request TDS measurement only <a>D0! <a>14700.9<cr><lf> Read TDS

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Page 19

DIRECT READ MODBUS & SDI-12

Request Measurement with CRC

<a>MC! <a>0024<cr><lf> Request all basic measurements with CRC <a>D0! <a>+22.0512+155.0127+155.2155+12.0512 {crc}<cr><lf> Read: temperature, conductivity (linear),

conductivity (nLFn), pressure

<a>MC1! <a>0021<cr><lf> Request temperature measurement only <a>D0! <a>+22.0512 {crc} <cr><lf> Read temperature

<a>MC2! <a>0021<cr><lf> Request linear conductivity measurement only <a>D0! <a>+155.0127 {crc} <cr><lf> Read linear conductivity

<a>MC3! <a>0021<cr><lf> Request nLFn conductivity measurement only <a>D0! <a>+155.0127 {crc} <cr><lf> Read nLFn conductivity

<a>MC4! <a>0021<cr><lf> Request pressure measurement only <a>D0! <a>12.0512 {crc} <cr><lf> Read pressure

<a>MC5! <a>0021<cr><lf> Request salinity measurement only <a>D0! <a>+20.7862 {crc} <cr><lf> Read salinity

CT2X INSTRUCTIONS

<a>MC6! <a>0021<cr><lf> Request TDS measurement only <a>D0! <a>14700.9 {crc} <cr><lf> Read TDS

Concurrent Measurement

<a>C! <a>0024<cr><lf> Request all basic measurements <a>D0! <a>+22.0512+155.0127+155.2155+12.0512<cr><lf> Read: temperature, conductivity (linear),

<a>C1! <a>0021<cr><lf> Request temperature measurement only <a>D0! <a>+22.0512<cr><lf> Read temperature

<a>C2! <a>0021<cr><lf> Request linear conductivity measurement only <a>D0! <a>+155.0127<cr><lf> Read linear conductivity

<a>C3! <a>0021<cr><lf> Request nLFn conductivity measurement only <a>D0! <a>+155.0127<cr><lf> Read nLFn conductivity

<a>C4! <a>0021<cr><lf> Request pressure measurement only <a>D0! <a>12.0512<cr><lf> Read pressure

<a>C5! <a>0021<cr><lf> Request salinity measurement only <a>D0! <a>+20.7862<cr><lf> Read salinity

conductivity (nLFn), pressure

<a>C6! <a>0021<cr><lf> Request TDS measurement only <a>D0! <a>14700.9<cr><lf> Read TDS

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DIRECT READ MODBUS & SDI-12

Concurrent Measurement with CRC

<a>CC! <a>0024<cr><lf> Request all basic measurements with CRC <a>D0! <a>+22.0512+155.0127+155.2155+12.0512 {crc}<cr><lf> Read: temperature, conductivity (linear),

conductivity (nLFn), pressure

<a>CC1! <a>0021<cr><lf> Request temperature measurement only <a>D0! <a>+22.0512 {crc} <cr><lf> Read temperature

<a>CC2! <a>0021<cr><lf> Request linear conductivity measurement only <a>D0! <a>+155.0127 {crc} <cr><lf> Read linear conductivity

<a>CC3! <a>0021<cr><lf> Request nLFn conductivity measurement only <a>D0! <a>+155.0127 {crc} <cr><lf> Read nLFn conductivity

<a>CC4! <a>0021<cr><lf> Request pressure measurement only <a>D0! <a>12.0512 {crc} <cr><lf> Read pressure

<a>CC5! <a>0021<cr><lf> Request salinity measurement only <a>D0! <a>+20.7862 {crc} <cr><lf> Read salinity

CT2X INSTRUCTIONS

<a>CC6! <a>0021<cr><lf> Request TDS measurement only <a>D0! <a>14700.9 {crc} <cr><lf> Read TDS

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Page 21

MAINTENANCE

CT2X INSTRUCTIONS

Desiccant Tubes on Vented Units

On vented sensors, inspect the desiccant tube at least once every two months. The desiccant tube prevents moisture in the air from being sucked into the vent tube, which can cause erratic readings and sensor damage.

The desiccant tube is lled with blue silica gel beads. A locking barb and a hydrophobic water lter are attached to the end of the desiccant tube. This lter prolongs the life of

the desiccant as much as three times over a desiccant tube

without the lter.

Install the sensor so that the desiccant tube and cable

connector will not ood or lie in water.

The desiccant is a bright blue color when active and dry. As moisture is absorbed the color will begin to fade, becoming a light pink, which indicates full saturation and time to replace. Replacement desiccant and hydrophobic

lters can be purchased from Seametrics.

To Change the Desiccant:

• Pulling gently remove the black tube tting from the clear desiccant tube.

• Using needle-nose pliers, remove the dark gray foam plug. Do not discard the plug.

• Dump out the old desiccant beads and rell with new desiccant beads – tapping desiccant tube

frequently during relling to ensure that the beads

are fully seated in tube.

• Push the foam plug back into the tube.

• Reinsert the black tting.

Removing Debris from End Cone

At times mud, silt, or other debris may foul the water inlets to the pressure element. The end cone can be removed to clean out the debris.

1. Gently twist off end cone portion only - do not twist off pressure element!

2. Remove debris. Do not poke anything into the sensor. This can damage the sensor element and void the warranty.

3. Replace and retighten the end cone.

Pressure element

Water inlet

End cone

Gently twist off the end cone and carefully remove debris

Sensor

There are no user-serviceable parts, other than the batteries. If problems develop with sensor stability or accuracy, contact INW. If the transducers have been exposed to hazardous materials, do not return them

without notication and authorization.

Cable

Cable can be damaged by abrasion, sharp objects, twisting, crimping, crushing, or pulling. Take care during installation and use to avoid cable damage. If a section of cable is damaged, it is recommended that you send your sensor back to replace the cable harness assembly.

End Connections

The contact areas (pins & sockets) of the connectors will wear out with extensive use. If your application requires repeated connections other types of connectors can be provided. The connectors used by INW are not submersible, but are designed to be splash-resistant.

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Page 22

MAINTENANCE

Changing Batteries

CT2X INSTRUCTIONS

Battery Type: Two 1.5V AA batteries—Lithium or Alkaline (lithium recommended)

IMPORTANT!

Because changing the batteries involves opening the water-tight seal, this must be done in a clean, dry environment to avoid contamination or moisture damage to the circuitry.

IF USING ALKALINE BATTERIES —PREVENT BATTERY LEAKAGE!

not apply to lithium batteries.)

• Change the batteries at least every 12 months.

• If the sensor will not be deployed for 3 months or more, remove the batteries.

Tips

• Never place a tool on the sensor body, it is very thin and will deform causing leaks at o-ring seals and potentially crushing the circuit board!

• Always twist the sensor body off the top cap assembly rather than twisting the top cap assembly off of the sensor body.

• For cabled sensors, always clamp the sensor on the swaged area when applicable, the shoulder above it will allow you to press down without the worry of the sensor slipping out of the clamping device.

• If the sensor body is slippery or you are unable to grip it hard enough to twist, try a piece of rubber cabinet liner for additional friction.

There is a black, compressible square ring near the top of the sensor. This ring acts as a spring to lock the cable in. This needs to be compressed in order to allow removal of the top cap. Once this ring is compressed, a gentle counterclockwise twist is all that is needed to remove the cable from the sensor body. Compressing the black square ring does take force, twisting does not.

HousingTop cap

Swage Knurling Black square ring

Cabled Sensor

Top cap

Knurling Black square ring

Housing

Cableless Sensor

Care must be taken to compress the black square ring before attempting to twist the housing. Forceful twisting

of the housing can permanently damage the sensor.

Securing the Sensor

In order to compress the black square ring, the sensor must be secured so that you can apply downward pressure to compress the ring. This can be done by holding in your hand, using a vise, or using pliers, as follows.

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Page 23

MAINTENANCE

CT2X INSTRUCTIONS

By Hand—cabled version only

1. Tightly grasp the top cap in one hand.

2. Brace your hand against something such as a table or the ground. (Do not allow the cable to be pinched against the brace.)

Continue to Removing the Housing on the next column.

With Vise—recommended method

Cabled Sensor

1. If possible, use a set of soft jaws as shown to prevent marring the surfaces of the top cap assembly.

2. Place the sensor in a vise clamping gently on the swaged area. You do not need to clamp the vise very hard.

Continue to Removing the Housing on the next column.

With Pliers or Vise Grips—good for eld use

Cabled Sensor

1. Grasp the pliers on the swaged area (do not grab the knurled diameter).

2. Find a hard edge and place the tips or side of the jaws of the pliers onto this edge as shown. This will allow you to press down with your weight to compress the square ring.

Continue to Removing the Housing in next page.

Cabled Sensor—gripping on swage

Cableless Sensor

1. If possible, use a set of soft jaws as shown to prevent marring the surfaces of the top cap assembly.

2. Remove the cableless top cap.

3. Place the sensor in a vise clamping gently on the knurled area. You do not need to clamp the vise very hard.

Continue to Removing the Housing on the next column.

Cabled Sensor

Cableless Sensor

1. Leave the cableless cap on in order to protect the pins inside.

2. Grasp the pliers on the knurled area tightly being careful to avoid grabbing the knurled cap.

3. Find a hard surface and place the cableless cap down onto it. This will allow you to press down with your weight to compress the square ring.

Continue to Removing the Housing in next page.

Cableless Sensor

Cableless Sensor—gripping on knurled area

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Page 24

MAINTENANCE

CT2X INSTRUCTIONS

Removing the Housing

1. With your free hand, grasp the sensor body. Press down to compress the square ring. Twist gently. Once the body begins to twist, you can stop the compression action.

2. Finish gently twisting until the sensor body is removed.

3. Carefully disconnect the wiring connector inside from the circuit board in the top cap.

Replacing Batteries and Resealing Sensor

1. Gently pull wiring to one side in order to allow batteries to fall out. Shake gently if needed.

2. Replace batteries with button (+) facing open end.

3. Reinstall wiring connector — it only goes in one way, so make sure not to force it.

4. Hold the top cap assembly at 90° to the housing opening as shown. Depress the spring with your

ngertip and tuck the wiring into the cutaway on

the circuit board with your thumb to protect it while being installed back into the housing.

Wires tucked into slot and spring tucked into housing

5. Rotate the top cap assembly into the opening in the housing being very careful not to nick or pinch any wires.

Pull wires gently to the side to allow battery removal

Connector connected properly

Push top cap in before twisting and locking

6. Gently press down until the assembly stops and then twist it into place. It will click in and decompress the gasket when it is fully engaged.

Properly completed—black ring uncompressed

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Page 25

TROUBLESHOOTING

Problem Probable Causes Things to try…

CT2X INSTRUCTIONS

Software will not

Loose cable Make sure all cable connections are secure communicate with sensor

Contacts in connector loose Be sure all wires are securely fastened inside the

USB driver not installed See Connecting the CT2X to a Computer in

Incorrect USB or COM port selected If using Aqua4Plus, be sure USB is selected in

Seametrics INW CT2X Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual