Blease 8500 - Flow Control Set-Up

Title: 8500 Adjustment & Calibration Document No: 129AC000 Sheet 7 of 12
BLEASE QUALITY DOCUMENT
BQD 083.V2
25/5/94
Fine calibration
Ensure that unit is in cal standby.
Note: to run the Blease Medical Test I/O Diagnostics connect the ventilator serial cable between
the calibration port connector on the back panel of the 8500 & a PC. Run HyperTerminal on the
PC using the stored 8500 settings file.
Press CTRL+E on the PC followed by the up cursor key. Page through the diagnostics using
the TAB key & scroll through using the UP/DOWN cursor keys.
On page 1 set gas to that specified by the model number, use right cursor, set gas convert to
Norm.
4.8 Flow Control Set-up
Connect Gas supply, Flow sensor, Fresh gas sensor and Mains power supply to the rear of the
ventilator.
With no fresh gas supply and the flow sensor disconnected from the test lung, select the
relevant fields; on the flowmeter, watch peak flow on constant not peak.
Select Flow valve just off ref. value.
Press space bar to start auto-find. A series of dots will appear in the value field. Once the lowest
achievable flow has been discerned, the relevant value will replace the dots.
Select Min flow available (use right cursor) enter peak value from the monitor.
Select Flow valve on full ref. value.
Press space bar to start auto-find. A series of dots will appear in the value field. Once the highest
achievable flow has been discerned, the relevant value will replace the dots.
Select Max flow available (use right cursor) enter peak value from the monitor.
Press Ctrl+U to save flows.
4.9 Zero Offset Correction
Select Patient airway pressure zero, to cal press Space Bar
Select Drive gas pressure zero, to cal press Space Bar
Select Flow gas pressure zero field
Adjust RV3 on the Interface board for a Flow gas pressure zero adjustment parameter of 600 ± 5,
press spacebar to update display. When achieved press Space Bar to save.
Select Patient Flow Pressure Zero.
Adjust RV1 on the Interface board for 0V +/-5mV at PFZ test pin.
Press Space Bar to save.
Select Fresh gas flow zero.
Adjust RV2 on the Interface board for -50mV +/-5mV at FGZ test pin.
Press Space Bar to save
Press Ctrl+U to save zeros.