Page 96 (Model K)
17. Calibration Procedure for V4.3.1 & V4.3.2 software
The calibration procedure is to be used in-conjunction with a checklist. The
checklist is used to record the calibration values set during the procedure. This
checklist will be become part of the service record of the ventilator. A template
checklist (which should be copied) is to be found in Appendix 1 of this manual on
page 273.
Where information needs to be recorded the user will see symbol next to
the section.
Note: Prior to calibration enter ENGMODE and record the following Gain /
Offset values. This will allow you to revert the ventilator back to it pre-
calibrated state if required.
Gain and Offset for the 1 PSI and 2.5 PSI pressure transducers.
Gain and CMV Offset for the Forward jet.
Gain and CMV Offset for the Mean jet.
Insp leading Edge Fast / Slow rise time and F/S Balance.
Exp leading Edge Fast / Slow rise time and F/S Balance.
Use the table of pre-calibration constants in Appendix 1.
17.1 Equipment required for calibration.
1. A calibrated flow analyser.
2. N9025 calibration kit.
17.2 Preliminary Inspection before calibration
a) Check all tubing connections are fully home in their fittings.
b) Check that the oxygen cell is properly located (finger tight) and that its
electrical connector is connected.
c) Check that the electrical connections to the PR4 and PR6 are screwed on
tightly (finger tight).
d) Check the pneumatic harness with particular attention to the connections to
the 25 way ‘D’ type connectors.
e) Ensure that the exhalation block can be removed and relocated easily and that
the nozzle assemblies (jet blocks) and ‘O’ rings correctly fitted.
f) Check for leaks in the pneumatic system.
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