Flow Analyzer Setup 3-5
C o n n e c t i n g t h e L o w F l o w M o d u l e
The 4082 low flow module is used for testing flow in oxygen concentrators and other low flow devices.
It is not designed for testing ventilators.
Unidirectional mode symbol. The module is not detecting significant negative flow. When testing
To Patient
The low flow module includes a push-to-fit tube fitting. To install, push tubes into coupling. To remove
fittings, press or pry ring toward the coupling body with a small screwdriver while pulling coupling away
from flow module.
P r e - T e s t C h e c k s
Low Flow Module
Flow Measurement
To ensure proper operation of the system for safety, ensure the 4082 flow calibration is valid. If the
calibration due date is approaching or past according to the factory attached label, return the flow
module to TSI
®
for calibration. To do a quick check, disconnect the flow module from the breathing
circuit and cap the ends, wait 1 minute and then observe the flow reading. If the flow rate does not
measure 0.000 ± 0.010 liters/min, return the flow module to TSI
®
Incorporated for calibration.
High Flow Module
Flow Measurement
To ensure proper operation of the system for safety, ensure the 4081 flow calibration is valid. If the
calibration due date is approaching or past according to the factory attached label, return the flow
module to TSI
®
for calibration. To do a quick check, disconnect the flow module from the breathing
circuit and cap the ends, wait 1 minute and then observe the flow reading. If the flow rate does not
measure 0.000 ± 0.010 L/min, return the flow module to TSI
®
Incorporated for calibration.
Flow Direction Sensor
The model 4081 High Flow Module has a sensor that is used to detect the direction of flow. This
sensor will normally auto-zero if there is no flow for a fraction of a second. To manually zero the
direction sensor, remove the high flow module from the flow source and cover one or both ends of the
flow tube for a couple of seconds.
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