Log into the CMA webshop with your credentials. Select the desired product and quantity and click ‘Add to cart’. Once you have selected all products, go to you cart using the Cart symbol. You will see the list of your ordered products. You can still make changes to quantities or remove products. Click ‘Proceed to […]
Currently it is not possible to request a quotation in the CMA online store directly. To request a quotation please send an email to CMA international@cma-science.nl.
You can browse the CMA online store in different ways: via Subject Areas followed by an educational sector/subject or via Category followed by a product type. If you know the CMA product number or name you can find it via the Search option.
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If the steps follow each other too quickly, stuttering may occur as soon as the syringe is pressed. This problem appears sometimes when the command Titrate(…;Fast) is used. For a slow titration (Titrate(…;Slow)) the step motor burette should function properly. If fast titration is required, try to increase the waiting time between the steps (only […]
If the ‘Titrate’ command makes the step motor moves backwards while the ‘BackMotor’ command makes it move forward: Exchange the wires connected to the outputs A1 and B1 of CoachLab II+.
This can be due to the motor itself or to the type of syringe. Check the following: If the power adapter of your CoachLab II/II+ has a voltage switch, make sure it is set to 12 Volts For an older type of titrator: the syringe deforms when it is pushed too hard into the titrator […]
If a force is exerted on the sensor larger than the maximally allowed force (> 80 N), the internal mechanism will lose its elasticity. The sensor will no longer function properly afterwards and will have to be replaced.
Yes, this is normal behavior. The sensor uses a Hall-element which always gives a sinusoidal signal with an amplitude of approximately 2,5 mT on top of the measured signal. This is called “1/f noise”.
This may be caused by several factors: The test subject is moving during the measurement. Let the test subject sit in a chair relaxed, with their arm lying at their side or on a table when data are being collected. The used sampling frequency may influence the amount of detected noise. A sampling frequency of […]
A possible cause for this phenomenon is a measurement frequency that is too high. The sampling frequency used in experiments with a motion detector is limited by the speed of sound in air (about 340 m/s): if a distance of 10 m is measured, the sound pulse takes about 59 ms to travel from the […]
The sensor makes use of an electrochemical cell to determine the oxygen concentration. This cell will deteriorate over time, which limits the shelf-life of the sensor to 2 or 3 years. The sensor needs to be replaced after this period.
Yes, CMA supplies a CO2 to O2 Tee coupling piece (art. No. 07661) which fits the sampling bottle to which the two gas sensors can be connected.
When the sensor is collecting data, the intensity of its IR source is modulated (the sensor takes a reading about every 3 s). If the sampling frequency is set to a higher value, the CO2 readings will have some fluctuations (between readings taken when the IR source is on and the readings taken when the […]
The CO2 sensor can be calibrated using the calibration button on the sensor box. This button sets the reading of the sensor to a value around 400 ppm CO2 (the theoretical CO2 concentration value in fresh air). Place the 250 mL sampling bottle delivered with your sensor in the air outside long enough to ensure […]
From a teacher we got a tip for checking the accuracy of the spirometer. The calibration can be controlled with two drain tubes of known content, pressed into each other and closed off. One tube section is filled with water, the other remains empty. Connect the spirometer to the empty tube at the closed side […]
A spirometer measures the rate of air flow in liters per second. The total volume of air that has moved through the spirometer can be calculated by integrating the air flow rate as a function of time. Use the function Analyze/Process > Integral for this. When the air flow data is converted to volume you […]
There can be a couple of reasons why Coach fails to communicate with VinciLab: The VinciLab driver is not installed correctly on your computer. After a successful installation, VinciLab should be visible in the Windows Device Manager under Network adapters. If the driver wasn’t successfully installed, it can be installed manually in Device Manager by […]
There appears to be a problem with some (newer) sensors where the EEPROM cannot be read properly by the CLAB. A solution for this hardware problem is yet unknown. At the moment we advise you to manually select unrecognized sensors from the sensor library.
There is a hotfix available for Windows 7, Vista Windows Server 2008 R2, Windows Vista or Windows Server 2008, and a separate hotfix for Windows XP. After installation of the hotfix use the Device Manager to uninstall the VinciLab driver while VinciLab remains connected to the computer via the USB cable. Then disconnect the USB […]
Wireless measurements are possible with: VinciLab via WiFi as well with computers as with tablets. WiLab via Bluetooth with tablets. CLAB can be used as a standalone data-logger. The experimental setup is prepared using the Coach software on a computer or the E-CON application on a CASIO Graphic Calculator and uploaded to CLAB. The measured […]
Older CoachLab II+ models (without a serial number, or with serial number SAG08XXXXX and SAG09XXXXX) are currently supported in Windows only. Newer models are support everywhere.
All CMA sensors, both wireless sensors, and wired BT sensors, are supported in Coach, along with most Vernier sensors with BT connectors. When buying sensors, make sure to match them with the interface you use.
The following CMA interfaces are supported: On Windows: WiLab, CLAB, CoachLab II+ and VinciLab 2. On OS X: WiLab, CLAB, CoachLab II+ and VinciLab 2. On iPad: WiLab (BlueTooth), VinciLab, wireless via Wi-Fi. On Android: WiLab, VinciLab, wireless via Wi-Fi, CLAB, CoachLabII+ via a USB port (a Micro USB OTG-hub or cable is needed to connect […]
Yes, *.cma7 and *.cmr7 files are interchangeable between all supported operating systems.
Yes, most activities from Coach 6 can be opened directly in Coach 7, but not the other way around. There are a few cases where conversion is not possible, e.g. when a text contains an image. In these cases, the activity will have to be manually modified.
See for a full overview the ‘What is new ‘ PDF on the download page of Coach 7. Some important improvements are: a new data table that makes working with multiple runs easier, using drag-and-drop to make graphs, automatic interface and sensor recognition, many graphical updates and usability improvements. The software has seen a large […]
Whenever new functionality is added to Coach, or when enough bugs are fixed, a new minor version of Coach will be released. You can expect two or three updates per year, one of which will be likely prior to the start of the academic year.
Coach 7 works on computers with Windows 7 or newer and Apple computers with OS X 10.11 El Capitan or newer. The Coach 7 app can be used on Chromebooks, but only if the Chromebook supports the use of Android and Android-apps. An extensive list of Chromebooks that (will) support Android is available here.
This is possible with the Simulate option. Here the value of a model parameter can be changed without having to edit the model continuously. To open the simulation window, right click in the Model window and choose “Simulate”.
When multiple events are required, it is usually more convenient to use the “Pulse” function. To use several events with the pulse function you need to introduce an auxiliary variable. Double click the variable and click on Formula and select ‘Use condition’. After that you can define your formula using the Pulse option.
Coach 7 supports many common video formats and containers: mov, mp4, m4v, 3gp, 3g2, avi, wmv, asf, mpg, mpeg and m1v. In some cases videos cannot be imported, for example if they have been recorded with a smartphone. Please use a video conversion tool such as Any Video Converter to convert your video to a […]
The problem is likely due to the type of video that is being imported. Please use a video conversion tool such as Any Video Converter to convert your video to a format suitable for Coach (e.g. from mp4 to avi). You can find a short guide to perform the conversion here. Note: During the installation […]
When choosing a sensor from the sensor library you can use the checkboxes on the right to filter the sensors by manufacturer. You can also add new sensors and calibrations when you use the Calibrate or Create a Sensor tools.
No. Using the Meter display tool can let you keep track of the current magnitude of the signal, while running a measurement lets you display a graph to examine the signal’s time variability.
No, this is not possible. However, you can obtain more data points through interpolation. Use the option Process/Analyze > Smooth for this and choose ‘Spline’ combined with ‘Replace data’.
Every interface has a maximum number of data points that can be collected. If this maximum is reached, the measurement stops automatically, even if a longer measurement time was set. The maximum is 16.380 points for CoachLab II, 32.760 points for older models of CoachLab II+, and 500.000 points for the newest CoachLab II+ models […]
First check the measurement settings to verify that the correct time and unit have been entered. It is also possible that the length of the time-axis in a diagram is shorter than the measurement time. This makes the measurement look shorter than it actually is. Use the option ‘Zoom to fit’ to show the entire […]
You can add multiple options to an MSI-installer. Consult the software Installation guide for more details. Use the options LICENSENAME and LICENSECODE to set these parameters for the entire installation process. When installing to a network location for shared access, the location of the license file can be fixed by modifying Coach.ini. It is still […]
