Vernier Go Direct GDX-SPR Manual page 2

Identifying the Sensor
When two or more sensors are connected, the sensors can be identified by tapping
or clicking Identify in Sensor Information.
Using the Product
Connect the probe following the steps in the Quick Start section of this user
manual.
Go Direct Spirometer can be used for inspiratory and expiratory experiments.
Use a mouthpiece and a disposable bacterial filter with the Go Direct Spirometer
for all experiments. According to the manufacturer's specs, the MicroGard
out more than 99% of bacterial and viral aerosols.
Note: Every person must use their own bacterial filter and mouthpiece—do not
share these.
1. Use a nose clip to ensure that the subject is only breathing through their
mouth.
2. Connect a disposable bacterial filter and a disposable mouthpiece to the Flow
Head of the sensor on the side labeled "Inlet."
3. Hold the Go Direct Spirometer vertically and still during use.
Channels
Go Direct Spirometer has six measurement channels:
Flow Rate
l
Volume
l
Adjusted Volume
l
Cycle Volume
l
Respiration Rate
l
Differential Pressure
l
Flow Rate
This channel reports the flow rate (L/s) of air moving through the flow head.
During the ventilation cycle, inhalation will produce negative flow rates while
exhalation produces positive flow rates. This channel is active by default when the
sensor is connected.
Volume
This channel reports the volume of air (L) passing through the flow head. During
the ventilation cycle, inhalation will increase volume while exhalation decreases
volume. This channel is active by default when the sensor is connected.
Adjusted Volume
This channel reports the volume or air (L) passing through the flow head. The
volume is returned to zero after each ventilation cycle. Use this channel to
minimize baseline drift. This channel is not active by default when the sensor is
connected.
® Cycle Volume
filters
This channel reports the peak volume (L) of each ventilation cycle. Use this
channel for long experiments and to minimize baseline drift. This channel is not
active by default when the sensor is connected.
Differential Pressure
This channel measures the pressure differential (Pa) across the screen inside the
flow head. This channel is not active by default when the sensor is connected.
Respiration Rate
This channel detects inhalations and calculates the number of breaths per minute
(BPM). The sample window for the calculation is 30 seconds. The advance
interval is 10 seconds. The value will update every 10 seconds. Use this channel
for long experiments. This channel is not active by default when the sensor is
connected.
Calibrating the Sensor
Go Direct Spirometer is factory calibrated and should not require calibration by
the user.
For the most accurate measurements, we recommend adjusting the volume channel
using a 2 L syringe (not included). This is a simple process that takes only a few
minutes.
For further calibration information, see
2
www.vernier.com/til/3353