3:Operation
23
Table 3. Screen Displays (cont.)
Display
Meaning
ATP
Atmospheric temperature and pressure: a condition
of volume measurement. The Certifier
®
FA Test
System calculates the ATP value by applying the
actual gas temperature and pressure to the STP
measurement.
BPM
Breaths per minute: a unit of respiratory rate. Can
be displayed on the bottom line (either High Flow or
Low Flow module attached).
BTPS
Body temperature and pressure, saturated: a
condition of volume measurement. The Certifier®
FA Test System calculates a BTPS value by
compensating the STP measurement for BTPS
conditions (37 °C (98.6
F), ambient pressure,
100% relative humidity).
CAL 100%
O
2
Oxygen sensor calibration in progress (during
exposure to 100% O
2
).
CAL 21% O
2
Oxygen sensor calibration in progress (during
exposure to room air).
cmH
2
O
Centimeters of water: a unit of pressure.
I TIME
Inspiratory time (in seconds). Can be displayed on
the bottom line (either High Flow or Low Flow
module attached).
I:E RATIO
Ratio of inspiratory time to expiratory time, can be
displayed on the bottom line (when High Flow or
Low Flow module is attached).
L
Liter: a unit of volume.
LPM
Liters per minute: a unit of flow. The Certifier
®
FA
Test System calculates the LPM value by applying
the actual gas temperature and pressure to the
SLPM measurement.
MINUTE VOL Minute volume: an estimate of exhaled volume for
the next 60 seconds, based on the current breath.
Can be displayed on the bottom line (when High
Flow or Low Flow module is attached).
mmHg
Millimeters of mercury: a unit of pressure.
N
2
O
100% nitrous oxide supply gas, selected using the
GAS SELECT
key (if Low Flow module is attached).
