9 Anesthetic Gas Module Checking and Calibrating the Anesthetic Gas Module
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7 If Barometric Pressure or Span calibrations were performed, re-perform Zero calibration.
WARNING Only perform Zero, Barometric Pressure and gas Span calibration checks when the top cover is closed.
Light and electro-magnetic interference can affect the measurements.
Equipment required for checking
The following equipment is required for checking the AGM. Part numbers are given in the Parts List
section.
1 Electronic Flowmeter M1026-60144 (Instructions are provided with the flowmeter. See also
Service Note M1026A-034).
2 Span Calibration Equipment.
– Calibration Gas.
– Calibration Tubing
WARNING Philips Calibration Gas contains Halocarbon 22. Halocarbon 22 is represented in the Calibration
menu by “Substitute”, which is the default. If you are using another calibration gas, this must be
selected in the menu.
Checks and adjustments
The following sections explain the steps needed to carry out the checks and adjustments. A complete
check and calibration procedure requires approximately 45 minutes, including waiting time.
NOTE Make sure that the watertrap is attached.
Performance Leakage Check
Complete the following steps to do a performance leakage check:
NOTE Do not perform the leakage check while a Zero calibration is running.
1 Switch on the Philips M1026A Anesthetic Gas Module and the monitor.
2 Wait until the Anesthetic Gas Module enters the warm up phase.
3 Connect a flowmeter to the exhaust outlet of the Philips M1026A Anesthetic Gas Module.
4 Connect the watertrap to the watertrap manifold.
5 Note the flowrate.
6 Block the gas inlet at the watertrap inlet connector (use your fingertip).
The reading at the flowmeter should decrease to Zero (see table below). If it does not, systematically
block the pneumatic path at various points before the pump to isolate the leakage point. (See Figure
31, "Pneumatic System" for tubing connections.) When the fault has been corrected, repeat the
leakage check.
7 Connect the flowmeter to the inlet.
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