Functional Tests Periodic Maintenance
3 - 20 046-006272-00 A7™ Service Manual
3.8.3 Check the AG Module Accuracy
Prepare the following before checking the External and Internal AG module AG module accuracy:
• Gas cylinder, with a certain standard gas or mixture gas. Gas concentration should meet the
following requirements: AA≥1.5%, CO2≥1.5%, N2O≥40%, O2≥40%, of which AA represents
an anesthetic agent. a/c≤0.01 (a is the gas absolute concentration accuracy; c is the gas
concentration).
• T-shape connector
• Tubing
Follow this procedure to perform checking:
1. Connect the test system as follows.
FIGURE 3-22
NOTE: When checking the internal AG module, open the back cover of the
machine, disconnect the tubing as shown below and connect the
standard gas to the gas inlet
FIGURE 3-23
Relief valve
Gas cylinder
Tubing
AG module
Open to the air
Disconnect the tubing here
Gas inlet
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