# Does it make sense to undertake a preliminary study?
The completion of a preliminary study has many advantages and can allow you to minimise potential risks to your main study. As well as a way to check the design of the study (i.e. sensor incorrectly initialised, poor user compliance due to too many questions in surveys, too difficult or not enough options to select, etc), it allows you to optimise the main study. In general a preliminary study allows you to become familiar with the use of the sensor this will allow you to optimise quality of the data obtained.
# How is the data extracted from the sensor?
All sensors of the 4th generation (Move 4, LightMove 4, EcgMove 4, EdaMove 4) are placed into a cradle. The cradle is connected via USB to a PC with SensorManager software installed. This software allows the transfer of the sensor data to the PC.
# What format is the sensor data?
The measurement data from the sensor and all secondary parameters is recorded in the Unisens Data format. Unisens is a free and open source data format designed to capture the data from multiple sensors. For more information about unisens please visit UnisensViewer. A unisens data set consists of a meta file (unisens.xml) and different data files for each measurement signal and every secondary parameter. The secondary parameters are saved within the unisens data.
# Can the data be processed in other software applications?
Yes. You can process the raw data with other software applications such as EDFBrowser, Matlab, or Kubios HRV.
# Which interfaces does the sensor have?
In general, all sensors have a USB interface. Our newest generation of sensors (Move 4, LightMove 4, EcgMove 4, EdaMove 4) come with Bluetooth smart integrated in the design to allow for further integration with our experience sampling platform movisensXS.
# Is it possible to set markers and how?
The EcgMove 4 ECG and activity sensors have a marker function. When double tapping on the sensor a marker is set. If the sensor sets a marker, this is confirmed by a vibration.
# Is it possible to „test drive“ the sensor?
It is possible to test the sensor for a period of up to three weeks. Since we have a limited quantity of the sensors available for this purpose, please suggest a time period and what sensor you would like to test.
# Are the sensors available for hire?
Yes. You can hire our sensors for a weekly fee. Please contact us for a quote on this service.
# When I connect the sensor it displays „No driver found“. What do I do?
This error can occur when the driver for the sensor was not installed properly during the SensorManager installation. Please uninstall and then re-install the SensorManager and take care that the driver installation is not interrupted.
# What is the usual procedure from the measurement to the evaluation of the study?
A measurement is usually performed in six steps:
- Preparation of the sensor. Ensure that the battery is fully charged.
- Configure the sensor using the SensorManager software and start the measurement.
- Complete the measurement.
- Extract the measurement from the sensor and save the raw data. It’s always good to make a backup of the raw data as your next step.
- Open the data with the UnisensViewer and make any necessary edits.
- Analyse the data with DataAnalyzer.
# Where should I place the sensor to best calculate the metabolic rate of activity?
The best results will be obtained with the sensor placed on the right hip. It’s also possible to wear the activity sensor on the chest with a chest strap. Be sure to select the correct position when setting up the sensor. The position that the sensor is worn is important information that needs to be entered in to the DataAnalyzer to ensure proper calculations.
# How do we attach the sensor for the best data collection?
The sensor can be attached to the body in two different ways: with a chest strap or with adhesive electrodes. The data quality remains the same for both options. In contrast to the chest belt, adhesive electrodes can be disposed of after use. The chest strap comes in four different sizes (S, M, L, XL). The one-way electrodes are suited for short term measurements (1-2 days). For any measurement lasting more than 2 days, chest straps are highly recommended.
# What is the best sensor location to measure the EDA of a subject? What precautions should be taken?
The best locations to measure the electro-dermal activity are the inner surfaces of the hand and foot. If a measurement on the hands produces too many recording artefacts, then the feet are a viable alternative.
# The set measuring time is always reset to the original value at startup.
This problem occurs when invalid entries are entered for the measurement duration. Prior to each measurement, adjustments are made to the duration of the measurement, in relation to the minutes, hours and days. The field for minutes allows values from 0 to 59. The field for hours allows values from 0 to 23. Examples: 24 hours -> 1 day; 60 minutes -> 1 hour; 119 minutes -> 1 hour, 59 minutes.
# Can the measurement data be opened in Excel?
The data is saved in the unisens format by default. This format allows the data to be opened in the Unisens-Viewer. If the data is to be used in Excel, then during the save function, please select the “as .csv” option. We only recommend this option for short measurements.
# Payment Methods
# Bank Transfer
We prefer payments by bank transfer; please transfer the amount before the due date to the following bank account:
Bank: Sparkasse Karlsruhe
IBAN: DE60 6605 0101 0108 107335
Please always state our invoice number under "Reference". Please understand that we have to charge a transaction fee of 20 Euros for invoices issued in a foreign currency.
# Credit Card
You can also pay easily and securely with a credit card. For this we need your valid e-mail address to which we send a payment request via PayPal.
You don't require a Paypal account for this to function.
Please understand that we have to charge a fee of 4% of the order value when paying by credit card. This fee goes directly to Paypal.
Yes, you can use your Paypal account to pay your invoice. Our PayPal address is: firstname.lastname@example.org
When you pay, please state the invoice number so that we can assign the money to the correct invoice.
Please understand that we have to charge a fee of 4% of the order value when paying via PayPal, which goes directly to Paypal.