Van Essen CTD-Diver DI28 Series Product Manual

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CTD-Diver® DI28x Series

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Summary of Contents for Van Essen CTD-Diver DI28 Series

Page 1 CTD-Diver® DI28x Series...
Page 2 Van Essen Instruments B.V. makes no warranty of any kind with regard to this material, including, but not limited to, its fitness for a particular application. Van Essen Instruments B.V. will not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material.
Page 3 I hereby declare that the equipment named above has been designed to comply with the relevant sections of the above referenced specifications. The items comply with all applicable Essential Requirements of the Directives. © May 2022 Van Essen Instruments. All rights reserved. www.vanessen.com...
Page 4: Table Of Contents
USB Reading Unit ........................27 Stainless Steel Cable ........................ 27 Cable Clip ..........................28 Diver Copper Shield........................28 Smart Interface Cable ......................28 Communication Cable ......................29 Diver-Mate ..........................29 Diver-Link ..........................30 © May 2022 Van Essen Instruments. All rights reserved. www.vanessen.com...
Page 5: Introduction
CTD-Diver. This information is etched using a laser and is consequently chemically neutral and not erasable. About this Manual This manual contains information about Van Essen Instruments CTD-Diver with part number DI28x, see section 2.5, an instrument designed to measure groundwater levels, temperature and electrical conductivity.
Page 6: Measuring Water Level
The Baro-Diver measures the atmospheric pressure (p ) and the CTD-Diver measures the pressure baro exerted by the water column (WC) above the CTD-Diver and the atmospheric pressure (p Diver © May 2022 Van Essen Instruments. All rights reserved. www.vanessen.com...
Page 7 The top of casing is measured to be 150 cm above the Mean Seal Level (MSL): TOC = 150 cm. The cable length is not exactly known and therefore a manual measurement is taken. It turns out to be 120 cm: MM = 120 cm. © May 2022 Van Essen Instruments. All rights reserved. www.vanessen.com...
Page 9 ∙ K Tref 100+θ(T−T where: = Specific conductivity at T Tref K = Conductivity at T = Reference temperature (25 °C) T = Sample temperature θ = Temperature coefficient (1.91 %/°C) © May 2022 Van Essen Instruments. All rights reserved. www.vanessen.com...
Page 10: Ctd-Diver Model
Then the conductivity sensor is individually calibrated and tested at several conductivity values. The factory calibration is stored permanently in the CTD-Diver. A calibration certificate is available upon request. © May 2022 Van Essen Instruments. All rights reserved. www.vanessen.com...
Page 11: Technical Specification
EMC in accordance with the 89/336/EEC directive Basic EN 61000-4-2 standard Emissions EN 55022 (1998) + A1 (2000) + A2 (2003), Class B Immunity EN 55024 (1998) + A1 (2000) + A2 (2003) © May 2022 Van Essen Instruments. All rights reserved. www.vanessen.com...
Page 12: Environmental
Operating Temperature (OT) 0 °C to 50 °C Accuracy (max) ± 0.2 °C Accuracy (typical) ± 0.1 °C Resolution 0.01 °C Response time (90% of final value) 3 minutes (in water) © May 2022 Van Essen Instruments. All rights reserved. www.vanessen.com...
Page 13: Pressure
The smallest change in pressure that produces a response in the CTD-Diver measurement. 2.5.6 Display Resolution The smallest increment in pressure that the CTD-Diver can measure. 2.5.7 Overload Pressure The pressure at which the CTD-Diver pressure sensor will catastrophically fail. © May 2022 Van Essen Instruments. All rights reserved. www.vanessen.com...
Page 14: Conductivity
When programmed with the Averaging Sample method, the CTD-Diver samples data at a specified of these values at the specified averaging rate (Record Interval). Example Record Interval: 1 hour Sample Interval: 1 Minute © May 2022 Van Essen Instruments. All rights reserved. www.vanessen.com...
Page 15 Interval multiplied by the Interval Multiplier. For example, if the Base Sample Interval is 3 seconds and the Interval Multiplier is 5, then the sampling interval is 15 seconds. Note: The Base Sample Interval is equal for all steps. © May 2022 Van Essen Instruments. All rights reserved. www.vanessen.com...
Page 16 Interval Interval between Step samples multiplier samples Duration 5 seconds 10 minutes 20 seconds 90 minutes 60 seconds 15 hours 1800 5 minutes 150 hours 140910 20 minutes 1957 days © May 2022 Van Essen Instruments. All rights reserved. www.vanessen.com...
Page 17: Ctd-Diver Installation And Maintenance
Set the conductivity type to the desired type. See section 1.5.1 Specific Conductivity for more details. © May 2022 Van Essen Instruments. All rights reserved. www.vanessen.com...
Page 19 Project Settings. Subsequently, the program will jump to the tree view where the downloaded time series will be selected and a graph/table of the data will be shown. © May 2022 Van Essen Instruments. All rights reserved. www.vanessen.com...
Page 20: Installation In A Monitoring Well
CTD-Diver. CTD-Divers can also be used to indirectly measure discharge. In such a case, the CTD-Diver can be installed in a monitoring tube/screen next to a weir. © May 2022 Van Essen Instruments. All rights reserved. www.vanessen.com...
Page 21: Use Of Ctd-Divers At Varying Elevation
Second, immerse the CTD-Diver in a conductivity calibration solution. Ensure, that there are no air bubbles trapped inside the conductivity measurement cell. Take another actual reading and compare with the value of the calibration solution. © May 2022 Van Essen Instruments. All rights reserved. www.vanessen.com...
Page 22 This button is only visible Calibrate Diver when a CTD-Diver is connected and only enabled when the logging status of the CTD-Diver is stopped. Upon clicking the button, the following dialog will display. Calibrate © May 2022 Van Essen Instruments. All rights reserved. www.vanessen.com...
Page 23 Select this option to reset the CTD-Diver calibration to its factory settings. This option can be useful if you are experiencing difficulties calibrating the CTD-Diver. When this option is selected, click the Calibrate button to perform the reset. © May 2022 Van Essen Instruments. All rights reserved. www.vanessen.com...
Page 24: Appendix I Use Of Ctd-Divers At Varying Elevations
We therefore recommend that all Divers and the Baro-Divers in a network be placed such that the mutual height differentials are minimized. If necessary, multiple Baro-Divers can be deployed to avoid the abovementioned issues. © May 2022 Van Essen Instruments. All rights reserved. www.vanessen.com...
Page 25: Appendix Ii Ctd-Diver Communication Protocol
• All bytes must be sent with a maximum delay of 30 ms between the bytes. • When the delay exceeds 30 ms, a communication error response will be sent. © May 2022 Van Essen Instruments. All rights reserved. www.vanessen.com...
Page 26: List Of Commands
Data field length must be 20 characters XXXXXXXXXXXXXXXXXXXX = Monitoring point name 20 characters Example Description 20 characters (all ASCII) MW-3␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣ 5.4.3 Read Serial Number Read the unique serial number of the Diver. Command: None © May 2022 Van Essen Instruments. All rights reserved. www.vanessen.com...
Page 27 Command: XXXXXXXXXX Data field length is 10 characters per described format XXXXXXXXXX = Record number 10 characters (first record is record number 1; last record number is 144,000) © May 2022 Van Essen Instruments. All rights reserved. www.vanessen.com...
Page 28 STOPPED, or FUTURE START. The free memory indicates how many records (time stamp, pressure and temperature value) can be read until the Diver memory is full. Command: None Response: XXXXXXXXXXXXX:MMMMMM © May 2022 Van Essen Instruments. All rights reserved. www.vanessen.com...
Page 29 Command: None Response: XXXXXXXXXX Data field length is 10 characters per described format XXXXXXXXXX = Remaining battery capacity in percentage 10 characters © May 2022 Van Essen Instruments. All rights reserved. www.vanessen.com...
Page 30 Time-out occurred when still expecting characters ␣␣ UNKNOWN OpCode not recognized ␣ ERROR Checksum received incorrect ␣ ␣␣ WRONG Length byte value incorrect ␣ ␣ ERROR DATA Data field incorrect (value incorrect) ␣ © May 2022 Van Essen Instruments. All rights reserved. www.vanessen.com...
Page 31: Appendix Iii Ctd-Diver Accessories
Divers may be suspended on a stainless- steel wireline. This is an inexpensive method of deployment, and if in a well, allows the Diver to be easily locked out of sight and inaccessible. Part no: MO500 © May 2022 Van Essen Instruments. All rights reserved. www.vanessen.com...
Page 32: Cable Clip
USB port on the other, for connection to a laptop computer. The Smart Interface Cable allows for data download, programming settings, or starting/stopping the Diver while in Part no: AS346 the field. © May 2022 Van Essen Instruments. All rights reserved. www.vanessen.com...
Page 33: Communication Cable
A full battery can support more Part no: DM421 than 10 days of operational use and a LED will indicate when the battery voltage is low. © May 2022 Van Essen Instruments. All rights reserved. www.vanessen.com...
Page 34: Diver-Link
3 Diver data loggers over a cellular network. Easily integrate Diver-Link into the Diver-HUB web portal for real-time management of Part no: DN4xx site data, monitoring equipment and water levels. © May 2022 Van Essen Instruments. All rights reserved. www.vanessen.com...

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