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Vu Heart rate Sensor
Heart rate
Range: 0 to 200 bpm
Resolution: 1 bpm
Waveform
Range: -2,000 to 2,000 mV
Resolution: ±4 mV
The Heart Rate sensor sensing clip (pleth) holds an infrared LED that shines a light through
either a finger or ear lobe onto a light sensitive detector. As the amount of light transmitted
varies with the flow of blood, the sensor can record either blood flow (heart waveform), or
heart rate (beats per minute).
Note: This sensor is only suitable for use with the Vu data logger.
Connecting
Push one end of a Vu sensor cable into the shaped socket on the sensor's housing and
the other end to an input socket on Vu.
Insert the jack plug from the finger/ear lobe clip into the jack socket of the of the sensor
housing.
Vu will detect that the Heart rate sensor is connected and display values using the
currently selected range.
Measurement procedure
Note: This sensor works best if the test subject keeps the finger with the sensing clip still.
Attach the sensing clip to either the fingertip or to the ear lobe.
Sit still as any muscle movements will influence the signal. The red LED on the sensor
housing will start to flash in time with the heartbeat - wait for the signal to settle (approx.
10 seconds). If the clip is attached to the finger you may feel a throbbing sensation.
Once a regular heart rate is detected, begin recording data.
Data Harvest. Freely photocopiable for use within the purchasers establishment
Infrared LED
Light Sensitive Detector
(positioned on fleshy side of the
finger)
DS127 (2)
Product No. 2327
The Pleth
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Related Manuals for Data Harvest 2327
Summary of Contents for Data Harvest 2327
- Page 1 - wait for the signal to settle (approx. 10 seconds). If the clip is attached to the finger you may feel a throbbing sensation. Once a regular heart rate is detected, begin recording data. Data Harvest. Freely photocopiable for use within the purchasers establishment...
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Page 2: Practical Information
For full features (e.g. pictogram using heart picture) use with V3.2 or higher of the EasySense software. Upgrades are available from Downloads on the Data Harvest website (www.data-harvest.co.uk). Practical information The amount of light that can be detected by the Light Sensitive Detector (LSD) will vary with each test subject and as to whether the clip is attached to a fingertip or ear lobe. - Page 3 Stay still while recording data. Movement e.g. raising and lowering a hand, will change blood flow in the finger and give erratic readings. If the finger/earlobe clip ‘loses contact’ with the pulse, the reading may momentarily drop to zero. Contact lost Communication re-established The light sensitive detector (LSD) in the clip can be sensitive to high levels of ambient infrared...
- Page 4 Background The Heart rate sensor is used to measure the pulse that is found throughout the human body. This pulse will result in a change in the volume of arterial blood with each pulse beat. This change in blood volume can be detected in the fingertip or ear lobe using a technique called Photoplethysmography.
- Page 5 It is important that investigations do not become a competition. Consider any possible health problems before selecting the subject. Heart Waveform (mV) The heartbeat recorded by the Heart rate sensor is a measure of volume of blood in the finger or earlobe against time.
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Page 6: Limited Warranty
For information about the terms of the product warranty, see the Data Harvest website at: https://data-harvest.co.uk/warranty. Note: Data Harvest products are designed for educational use and are not intended for use in industrial, medical or commercial applications. WEEE (Waste Electrical and Electronic Equipment) Legislation Data Harvest Group Ltd is fully compliant with WEEE legislation and is pleased to provide a disposal service for any of our products when their life expires.