B40/B20 Patient Monitor9-4Every two months• Change the water trap when the ‘Replace D-Fend’ message displays on the screen.• Perform gas calibration in continuous use, see “Calibrating” in Gas chapter for detailprocedures.Every six monthsGas calibrationPerform gas calibration for airway gas monitoring according to the instructions in the relevantsection. If gas measurement is in extensive use, calibration is recommended every two months.See “Calibrating” in Gas chapter for detail proceduresNOTE: Do not wash or disinfect calibration gas sampling lines.Condition the batteryBattery conditioning is needed if the ‘Condition Battery X’ message is displayed.Condition the battery by fully discharging and recharging the battery twice according to thefollowing procedure:NOTE: The patient monitor must be in a discharged state during battery conditioning.Disconnect any acquisition modules from the patient monitor if connected.1. Turn on the patient monitor. Disconnect the power cord from the wall outlet. Leave thepatient monitor on until the battery is fully discharged and the patient monitor turns offautomatically.NOTE: Ignore the ‘Battery Low’ and ‘Battery Empty’ messages when discharging thebattery.2. Reconnect the power cord to the wall outlet and turn on the patient monitor. Leave thepatient monitor on until the battery is fully recharged and the orange battery chargingindicator LED turns off.3. Repeat the steps 1 and 2 once.The battery is now conditioned and ready for use. However if the ‘Condition Battery X’message is still shown on the screen, replace the battery or contact your service.Every 12 monthsPlanned maintenance checkThe annual check according to detailed instructions of the "Technical Reference Manual"requires trained service personnel and appropriate testing tools and equipment.Calibration check of temperature, NIBP and invasive blood pressuresCalibration check of temperature, NIBP and invasive blood pressures should be performed atleast once a year by qualified service personnel as a part of the Maintenance, see "TechnicalReference Manual”.Power interruptionNOTE: Always use the monitor with batteries inserted. Otherwise all trend data andtemporary settings are lost if the power cable is detached from the mains.If the monitor is turned off, patient data and the latest user-made settings remain in themonitor memory for 15 minutes even if the mains power is interrupted. If not, contact servicepersonnel. After 15 minutes, patient data is lost and the monitor returns to the user defaultsettings.
