Welch Allyn PneumoCheck Operating Instructions Manual page 51

STEADY
TEST.MODE
TEMP.LIM
TOO SOON
TRIM.LIM
NOTE: Encountering either the TEMP.LIM or TRIM.LIM messages
during normal operation may indicate a possible hardware failure.
In this event, turn the PneumoCheck switch to OFF then ON again.
Should this error persist, return your instrument to Welch Allyn.
TX FAIL
UNSTEADY
VER X.X
VOL LIM
Don't move the PneumoCheck. It is referencing
zero flow in order to establish a baseline.
Entrance into the test mode of the PneumoCheck.
This mode is used for testing and documenting
calibration.
The temperature range limit has been exceeded.
Allow PneumoCheck to return to operating range
(15 to 35°C) or (59 to 95°F). Blocked vents on
Printer/Charger may cause this problem.
The patient began exhaling before the instrument
was ready. Repeat the test, waiting to hear the
beep.
The device cannot trim the baseline. This is usually
due to an abrupt thermal change or a weak battery.
Return instrument to an acceptable operating
temperature range (15 to 35%) or (59 to 95°F) and
fully charge before proceeding.
Transmission failure.
The PneumoCheck has detected airflow during
STEADY portion of maneuver. Repeat test. If error
persists, contact Welch Allyn.
The software version in your PneumoCheck
spirometer.
The volume during a maneuver has exceeded the
PneumoCheck's capacity of 14 liters (minimum).
Such an FVC volume is not possible from a
human. Repeat the maneuver or recalibrate the
PneumoCheck.
47