Northern Meditec Crius V6, Operator'S Manual

Page: 98 / 182

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EtCO2(BTPS)= EtCO2*(1-(3.8/pamb))
Of which
：
EtCO2=from ISA delivered EtCO2 value[Vol%]
pamb=from ISA delivered atmospheric pressure [kPa]
3.8= typical partial pressure between the patient circuit and the water vapor of condensed water of
ISA [kPa]
EtCO2(BTPS)= EtCO2 value[Vol%] under BTPS
Assumed to have been calibrated the O2 using the room air in 0.7Vol% H2O humidity level.
7.4.4 Module calibration
ISA marginalia gas analyzer with automatic zero calibration function, no need the user to operate.
Switch the gas sampling from the breathing circuit to ambient air will calibrate to zero
automaticlly. Every 24 hours to perform an automatic zero calibrate, ISA CO2 module calibration
takes less than 3s, ISA AX + monitor calibration time less than 10s.
NOTE

Exist air in the ISA module is very important for zero calibrating successfully, so need to
ensure it’s ventilated environment is good; before and after zero calibration,avoid
breathing in it’s vicinity.

ISA modules adopt stable design, and has been done a permanent calibration when
leave factory, so no need for routine calibration. When appear a large measurement
bias or need the annual calibration, please contact our after-sales service department
for professional calibration.
7.4.5 Module LED status information
LED on sidestream gas module offers a variety of instructions in order to reflect the current state
in time
：
Display mode Statements
Green light no twinkle System OK
Green light twinkle Calibrating
Blue light no twinkle Exist anesthetic gas
Red light no twinkle Sensor error
Red light twinkle Check the sampling pipe
7.4.6 Module cleanliness