BIOPAC® Systems, Inc. Logo

NIBP100A sensor height & signal output

Sensor Height

NIBP100A blood pressure measurements will differ depending on whether the sensor is placed lower or higher than the subject’s heart (sensor height relative to the subject’s heart). This is natural and expected. In order to eliminate this potential problem, you have to ensure that the sensor is at the same height for all subjects and that this level approximates heart level as closely as possible.
  • One simple technique is to insert a pen under the subject’s armpit with the pen being parallel to the ground and keep the sensor at the level of the pen.
  • Another option is to place the subject’s arm in a sling because this will help to maintain the same height during the course of the test.

Alternatively, the NIBP100A has settings that can compensate for differences in the sensor height. Please consult the NIBP100A manual for details.

Flat Signals

Whenever the NIBP100A does not manage to get a reading from the subject it will plot a flat line. The NIBP100A tries to take a reading as often as possible. When it takes a reading it outputs the pulse waveform for the reading and replicates it until it is able to take another reading. The system takes a new blood pressure reading every 10-15 beats of the heart. If it fails to take another reading, it gives you a straight line from the time it failed until it takes another reading.

Analog Output

If you are unable to get an analog output signal from the NIBP100A, but the unit is measuring and displaying BP values on the front panel, the problem might be related to the Data Port setting. The analog output signal comes from the NIA V-Line interface that attaches to the data port on the rear of the unit. The analog output signal is only accessible if the device is set to no printer mode.

The Printer mode is identified when you first start the unit. The display will indicate whether the printer mode is set to one of three options: None / GSD / HP.

To change the mode so the unit will output the analog signals through the NIA V-Line interface:

  1. Turn the unit off.

  2. Hold down the Start/Stop button (hold down while you turn the unit on) and turn the unit back on.

  3. Repeat the cycle until the display shows that the Printer mode is set to None.

Associated Applications

Associated Application Notes

Associated Disciplines

Spotlight On
BioShirt wireless ECG and respiration

BioNomadix BioShirt

Smart shirt simultaneously acquires ECG and Respiration data while subjects roam freely The lightweight, comfortable BioNomadix BioShirt contains a respiration sensor and fabric electrodes to wirelessly record both respiration and ECG while ambulatory subjects move freely and perform tasks in short or long-term studies, in the lab, or in the real world. The shirt connects to a wireless BioNomadix BN-RSPEC Respiration […]

View All
Latest News

T4 Conference Poster Presentations

Research posters presented at BIOPAC’s T4 physiology conference (Tools, Trends,  Techniques, and Technology) exhibited leading physiological research utilizing BIOPAC’s technology. Research posters presented unique advances in neuromarketing and health research. The T4 conference, held at UCSB Monday, July 24, 2017 through Wednesday, July 26, 2017, showcased the latest trends in the Tech industry’s physiological research. […]

BIOPAC on Good Morning America | Anxiety and Excessive Cell Phone Use

ABC News | Good Morning America | Excessive Cell Phone Use JULY 31, 2017 | Excessive cell phone use may cause anxiety, experts warn BIOPAC user Nancy A. Cheever, Ph.D. from California State University, Dominguez Hills was featured on Good Morning America. Her study investigated whether spending too much time on your phone may be causing people to feel […]

Read All
Request a Demonstration
Request a Demonstration