PME C-Sense Logger and Sensor User Manual

PME C-Sense Logger and Sensor

WARRANTY

Limited Warranty

Precision Measurement Engineering, Inc. (“PME”) warrants the following products to be, as of the time of shipment, free from defects in materials or workmanship under normal use and conditions for the period indicated below corresponding to the product. The warranty period commences on the original date of purchase of the product.

For valid warranty claims made and covered defects existing during the applicable warranty period, PME will, at PME’s option, repair, replace (with the same or then most similar product) or repurchase (at purchaser’s original purchase price), the defective product. This warranty extends solely to the original end-user purchaser of the product. PME’s entire liability and the sole and exclusive remedy for product defects is limited to such repair, replacement or repurchase in accordance with this warranty. This warranty is provided in lieu of all other warranties express or implied, including, but not limited to warranties of fitness for a particular purpose and warranties of merchantability. No agent, representative, or other third party has any authority to waive or alter this warranty in any way on behalf of PME.

WARRANTY EXCLUSIONS

The warranty does not apply in any of the following circumstances

1. The product has been altered or modified without PME’s written authorization,
2. the product has not been installed, operated, repaired, or maintained in accordance with PME’s instructions, including, where applicable, use of proper grounding to an earth ground source,
3. the product has been subjected to abnormal physical, thermal, electrical, or other stress, internal liquid contact, or misuse, neglect, or accident,
4. the product failure occurs as a result of any cause not attributable to PME,
5. the product is installed with ancillary devices such as flow sensors, rain switches, or solar panels that are not listed as compatible with the product,
6. the product is installed in a non-PME specified enclosure or with other incompatible equipment,
7. to address cosmetic issues such as scratches or surface discoloration,
8. operation of the product in conditions other than that for which the product was designed,
9. the product has been damaged due to events or conditions such as caused by lightning strikes, power surges, unconditioned power supplies, floods, earthquakes, hurricanes, tornados, vermin such as ants or slugs or intentional damage, or
10. products provided by PME, but manufactured by a third-party company, which products are subject to the applicable warranty extended by their manufacturer, if any.

There are no warranties that extend beyond the above-limited warranty. In no event is PME responsible or liable to purchaser or otherwise for any indirect, incidental, special, exemplary, or consequential damages, including, but not limited to, lost profits, loss of data, loss of use, business interruption, loss of goodwill, or cost of procuring substitute products, arising out of or in relation to the product, even if advised of the possibility of such damages or losses. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.

WARRANTY CLAIM PROCEDURES

A warranty claim must be initiated within the applicable warranty period by first contacting PME at [email protected] to obtain an RMA number. The purchaser is responsible for proper packaging and return shipment of the product to PME (including shipping expense and any related duties or other costs). The issued RMA number and purchaser’s contact information must be included with the returned product. PME is NOT liable for loss or damage of the product in return transit and recommends that the product be insured for its full replacement value.
All warranty claims are subject to PME’s testing and examination of the product to determine if the warranty claim is valid. PME may also require additional documentation or information from the purchaser to evaluate the warranty claim. Products repaired or replaced under a valid warranty claim will be shipped back to the original purchaser (or its designated distributor) at PME’s expense. If the warranty claim is found to be not valid for any reason, as determined by PME in its sole discretion, PME will notify the purchaser at the contact information provided by the purchaser.

SAFETY INFORMATION

Bursting Hazard

Should water enter the C-sense Logger and come into contact with the enclosed batteries, the batteries may generate gas causing the internal pressure to increase. This gas will likely exit via the same location where the water entered, but not necessarily.

QUICK START

The Quickest Start Possible

Your C-sense Logger has arrived ready to go. It is set to measure and record time, battery voltage, temperature, and CO2 sensor output once every 10 minutes and write 1 file of measurements daily. You need only to plug on the sensor cable and sensor and the C-sense Logger will start recording files. In this condition, the C-sense Logger will record measurements for 1400 samples at 10 intervals before the internal rechargeable battery is drained. At the end of the deployment period, you need only to disconnect the sensor cable and connect it to a host device via the USB plug. The C-sense Logger will appear as a ‘thumb drive’. Your temperature, battery voltage, and CO2 concentration measurements, together with a time stamp indicating the time the measurement was made, are recorded in text files in the folder having the serial number of your C-sense Logger. These files can be copied onto any Windows or Mac host computer.

This Manual and other software is also recorded on the C-sense Logger “thumb drive”.

• CSENSECO2 CONTROL PROGRAM: Allows you to see the state of the logger as well as set the recording interval.
• CSENSECO2 PLOT PROGRAM: Allows you to see the plots of the recorded measurements.
• CSENSECO2 CONCATENATE PROGRAM: Gathers all the daily files into one CAT.txt file.

Follow these steps to start the deployment, logging CO2 & T once each 10 minutes

1. Spray or apply silicone lubricant to connectors. Wipe off any excess lubricant from the metal part of the pins. NOTE: The sensor to logger cable should never be plugged in dry. See section 3.3 of this document for more information.
2. Connect the sensor cable to the C-sense CO2 sensor. Secure the locking sleeve. Remove the black cap on the end of the sensor before deployment. Do NOT touch the sensor face.
3. Connect the sensor and sensor cable to the C-Sense Logger and secure the locking sleeve. This will start the recording of CO2 measurements. (Note that the cable connection to the C-sense Logger controls logging. Logging will occur if the cable is connected to the C-sense Logger even if there is no sensor connected to the other end of the cable.)

Follow these steps to end the deployment

1. Disconnect the cable from the C-sense Logger. This will halt measurements.
2. Connect the USB cable to the C-sense Logger.
3. Connect the USB end of this cable to a Windows or Mac host computer. C-Sense will appear as a ‘thumb drive’.
4. Copy the folder having the same serial number as the C-sense Logger (example 3200-0001) to the host computer.
5. (Suggested, but optional) Delete the measurement folder, but NOT CSenseCO2Control or the other .jar programs.
6. (Optionally) Run the CsenseCO2Control program to see the state of the C-sense Logger such as battery voltage or to select a different recording interval.
7. (Optionally) Run the CsenseCO2PLOT program to see a plot of measurements.
8. (Optionally) Run the CsenseCO2Concatenate program to gather together all the daily files of measurements into one CAT.txt file.
9. The recording is halted when no cable to the sensor is connected. If no more recording is desired, simply disconnect the USB cable.
10. Recharge the battery.

NOTE: The above table lists estimated numbers. Actual numbers will depend on the deployment environment and the individual C-sense sensor power demand. Letting the battery discharge below 9 Volts can lead to permanent damage of the battery pack.

A Few Details

The previous section gives instructions for sampling at 10-minute intervals. However, there are a few additional details that will enhance use of the C-sense Logger.

RECORDING INTERVAL

The C-sense Logger measures and records time, battery voltage, temperature, and dissolved CO2 concentration at equal time intervals. The default time interval is 10 minutes. However, it is also possible to instruct the C-sense Logger to record at different intervals. This is accomplished by running the CsenseCO2Control.jar program supplied with the C-sense. Recording intervals must be 1 or more minutes and must be less than or equal to 60 minutes. Intervals outside this range will be rejected by CsenseCO2Control. (Contact PME for other recording intervals.) Please refer to Chapter 2 for instructions on operating the CsenseCO2Control program.

TIME

All C-sense times are UTC (formerly known as Greenwich mean time (GMT)). C-sense measurement files are named by the time of the first measurement within the file. Each measurement within files has a time stamp. Both these times are UTC. The timestamp format is Unix Epoch 1970, the number of seconds that have passed since the first moment of 1970. This is inconvenient. The CsenseCO2Concatenate software not only concatenates measurement files but also adds more readable statements of the time stamp. The C-sense Logger internal clock will drift in the <10 ppm range (< about 30 seconds/month) so you should plan to connect it occasionally to a host having an internet connection. The CsenseCO2Control program will automatically set time-based on an internet time server. Please refer to Chapter 2 for instructions on operating the CsenseCO2Concatenate and CsenseCO2Control programs.

FILE INFORMATION

The C-sense Logger software creates 1 file daily. The number of measurements in each file will depend upon the sample interval. Files are named by the time of the first measurement within the file based on the logger’s internal clock and expressed in YYYYMMDD HHMMSS.txt format.

RECHARGEABLE BATTERY LIFE

The C-sense Logger consumes battery power mostly from the measurement of dissolved CO2, but also slightly from simply keeping track of time, writing files, sleeping, and other activities. Battery life will depend upon deployment temperature, battery wear, and other conditions. Based on customer feedback, the battery should be checked every month. Letting the battery discharge below 9 Volts can lead to permanent damage of the battery pack.

COIN CELL BATTERY LIFE

The C-sense Logger uses a coin cell for backup of the clock when the power is switched off. This coin cell will supply many years of clock operation. Should the coin cell discharge, it must be replaced. Contact PME.

SOFTWARE

Overview and Software Installation

The C-sense arrives with these files

• CsenseCO2Control.jar allows you to see the state of the logger as well as set the recording interval.
• CsenseCO2Plot.jar allows you to see plots of the recorded measurements.
• CsenseCO2Concatenate gathers all the daily files into one CAT.txt file.
• Manual.pdf is this manual.

These files are located on the root directory of the C-sense ‘thumb drive’ within the logger. PME suggests you leave these programs where they are on the C-sense, but you may copy them to any folder on your computer’s hard drive. CsenseCO2Control, CsenseCO2Plot, and CsenseCO2Concatenate are Java language programs that require the host computer to have the Java Runtime Engine V1.7 (JRE) or later installed. This engine is commonly required for internet applications and will likely already be installed on the host computer. You can test this by running CsenseCO2Plot. If this program displays its graphical user interface then the JRE is installed. If not, then the JRE can be downloaded via the internet from http://www.java.com/en/. At this time C-sense Logger is supported on Windows operating systems but may also operate on Macintosh and perhaps Linux.

CsenseCO2Control

Begin program operation by clicking on CsenseCO2Control.jar. The software presents the screen shown below: The C-sense must be connected to a USB at this time. Click the Connect button. The software will contact the logger. If the connection is successful, the button will turn green and display ‘Connected’. The Serial Number and other parameters will be filled in from information taken from the C-sense. If the HOST computer is connected to the Internet, then the current difference between an Internet time server’s time and the C-Sense Logger’s internal clock will be displayed. And, if more than a week has passed since time was last set, the C-sense clock will be set, and a check mark icon will appear. If the HOST computer is not connected to the Internet, then no time services will occur. The current C-sense Logger sample interval will be displayed next to the Set Sample Interval button. If this interval is acceptable the interval need not be set. To set the interval, enter an interval not less than 1 minute and not greater than 60 minutes. Click the Set Sample Interval button. Shorter and faster intervals are available. Contact PME. End CsenseCO2Control by closing the window. Unplug C-sense USB connection. Upon disconnection of the USB cable the C-sense will begin logging when the cable to the sensor is connected. The logger will halt logging when this cable is disconnected.

CsenseCO2Plot

Begin the program operation by clicking “CsenseCO2Plot.jar”. Software presents the screen shown below.

CsenseCO2Plot plots the files recorded by the C-sense Logger. The software reads all C-sense files in a folder, except the CAT.txt file. The software will also compute CO2 saturation from the voltage measurement of the sensor. To do this software must be given the sensor calibration. The sensor manufacturer supplies the sensor calibration. If the Use Sensor Calibration is checked the plot will display calibrated values. If not checked the plot will display sensor output in Volts. Select the folder that contains the files recorded by C-sense. If CsenseCO2Plot is run directly from the C-sense the program will suggest the folder located on the C-sense. You may accept this by clicking on Process, or you may click on Select Data Folder to browse to your computer’s hard drive. If the number of measurements recorded is small, say a few thousand, these can conveniently be plotted directly from C-sense storage. However, it is best to copy large measurement sets to the host computer and select them there since file access to the C-sense Logger is slow.

C-sense measurement folders must NOT contain any files besides those C-sense records and the CAT.txt file Press Plot to begin plotting. The software reads all C-sense Logger data files in the selected folder. It concatenates these and presents the plot shown below.

ProOCo2 Logger Measurements

You may zoom this plot by drawing a square from upper left to lower right (click and hold left mouse button) that defines the zoom region. To zoom completely out, attempt to draw a square from lower right to upper left. Right click on the plot for options such as copy and print. The plot can be scrolled with the mouse while the Control key is held depressed. Copies of the plot can be obtained by right clicking on the plot and selecting Copy from the pop-up menu. Different DATA Folders can be selected during one session of the program. In this case the software produces multiple plots. Unfortunately, the plots are presented exactly on top of one other and so when a new plot appears it is not obvious that the old plot is still there. It is. Just move the new plot to see previous plots. The software can be re-run at any time. End CsenseCO2Plot by closing the window.

CsenseCO2Concatenate

Begin the program operation by clicking “CsenseCO2Concatenate.jar”. The program presents the screen shown below. CsenseCO2Concatenate reads and concatenates the files recorded by the C-sense Logger. The software produces CAT.txt in the same folder as selected for the data. CAT.txt contains all the original measurements and contains two additional statements of time. If the Use Sensor Calibration is checked the CAT file will contain an additional column of CO2.

Select the folder that contains the files recorded by C-sense. If CsenseCO2Plot is run directly from the C-sense the program will suggest the folder located on the C-sense. You may accept this by clicking on Process, or you may click on Select Data Folder to browse to your computer’s hard drive. If the number of measurements recorded is small, say a few thousand, these can conveniently be plotted directly from C-sense storage. However, it is best to copy large measurement sets to the host computer and select them there since file access to files on the C-sense logger is slow. C-sense measurement folders must NOT contain any files besides those C-sense records and the CAT.txt file. Press Concatenate to begin concatenating files and create the CAT.txt file.

The CAT.txt file will resemble the following

End CsenseCO2Concatenate by closing the window.

C-SENSE LOGGER

Overview

All of the C-sense Logger measurements pass from the sensors into files on the SD card C-sense contains. Files are transferred to a host computer via USB connection where C-sense appears as a “thumb drive”. Measurements may be plotted by CsenseCO2Plot and files concatenated by CsenseCO2Concatenate. The C-sense Logger itself is controlled by CsenseCO2Control software. Logging begins when the sensor cable is connected to the logger and ends when this cable is disconnected.

Recharging the Battery

Connect the battery charger. The charger will require power from a power supply. The charger has a LED light indicating the status of the charging.

The following table with shows the LED light indications

NOTE: To prevent the battery voltage from discharging to an unrecoverable state, PME recommends to re-charge the battery every month after use, if not sooner based on the sample rate.

Connector Maintenance

The plugging and unplugging of the sensor to logger cable can cause wear and tear over time if done dry. The cable manufacturer, Teledyne Impulse, recommends cleaning any debris from the connector pins and a quick spray of silicone lubricant for each mating cycle. It is recommended that only 3M non- food grade silicone lubricant be used. Avoid using any silicone lubricant that contains acetone. Wipe away an excessive lubricant on the metal part of the pins. The cable manufacturer recommends buying the following 3M spray:

https://www.mscdirect.com/product/details/33010091?item=33010091 Smaller 1 oz. spray bottles are also available for packing on board planes as a carry-on item from Teledyne Impulse. If the rubber is starting to peel back from the metal pin on any of the connector pins, please contact PME about replacing the cable. Further use could lead to a compromised seal and damage to the logger and/or sensor.

Battery Replacement

• Please do not open the logger. This will void PME’s warranty. Please contact PME for battery replacement.

Enjoy your new C-sense Logger!

CONTACTS

• WWW.PME.COM
• TECHNICAL SUPPORT: [email protected]
• TEL:760-727-0300

THIS DOCUMENT IS PROPRIETARY AND CONFIDENTIAL.

© 2021 PRECISION MEASUREMENT ENGINEERING, INC. ALL RIGHTS RESERVED.

References

• java.com/en/
• Sensors & Systems for Monitoring Water Parameters | PME
• Sensors & Systems for Monitoring Water Parameters | PME
• mscdirect.com/product/details/33010091?item=33010091

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