Philips Expression MR400 - Warm-Up Period; Zero Reference Adjustment

9‐2MonitoringAgentsandGases(AGENTOption) ExpressionMR400InstructionsforUse
WARNINGS
• Organic vapors (for example, from cleaning agents) in the sampling line or room air
may alter anesthetic agent readings.
• Alcohol in the patient’s breath can modify the anesthetic agent readings.
Warm-Up Period
Inordertoachieveaccurateidentificationsandmeasurements,theAGSsystemrequiresawarm‐
upperiodtothermallystabilize.Thiswarm‐upperiodbeginswhentheAGENTortheCO2
parameterisactivated.Uponactivation,theAGSsystemwillbecomefullyoperationalaccording
tothefollowingsequence:
1. Duringthewarm‐up
period,CO2WarmingUpwillbedisplayed.
2. Within45secondsofactivation,theAGSsystemwillbeabletoidentifythegasesand
providegasconcentrationinformationwithISO‐levelaccuracy.Waitduringthisperiod,the
measurementnumericvaluesintheAGENT,GAS,andCO2VSboxeswilldisplaythree
dashes
(‐‐‐);seeNoDataIndicationonpage2‐20fordetails.
3. Within10minutesofactivation,theAGSsystemwillbeabletooperateatfullaccuracy.
Zero Reference Adjustment
WARNING
During Zero calibration the system pulls ambient air through the zero intake port on the cart
The calibration system assumes that the ambient air will contain normal trace amounts of
CO2. If the system is placed in an unventilated area that allows CO2 (from the waste gas port
on the rear panel, if not connected to a gas scavenging system) to accumulate, the result could
be inaccurate CO2 zeroing and resulting inaccurate patient readings. Always place the cart in
a well ventilated area.
TheAGSsystemwilloccasionallyperformazeroreferenceadjustment,brieflyinterruptinggas
monitoringtotakeinroomairthroughareferencegasintakeporttoensuretheaccuracyofthe
displayedgasconcentrations.
ReadjustingCO2Zerowillbedisplayedduring azeroreferenceadjustment;allowtheprocessto
complete.
Azeroreferenceadjustmenttypicallytakes10–12seconds,andwilloccur
automaticallyasneeded,butmostlyduringthewarm‐upperiod.WhentheAGSsystemhas
becomefullyoperational,theseadjustmentswilloccurapproximatelyonceevery4hoursor
whenevertheAGSsystemtemperaturechangesbyatleast±1°Cfromthe
laststoredstable
temperature.