Mindray A7 Service Manual

System Calibration Calibration
4 - 56 046-006272-00 A7™ Service Manual
4.3.6.2 Common Failures and Recommended Actions
4.3.7 Calibrate the AG Module
Prepare the following before doing the calibration:
• 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 a calibration:
1. Connect the test system as follows.
NOTE: When calibrating 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.
Failure Description Possible Cause Recommended Action
After Begin is selected,
calibration failure is
displayed very soon..
The machine is under BFCS state. Set the machine to EFCS state.
N2O supply pressure is low.
Replace or connect gas supply to
make sure N2O pressure is within
the specified range.
After Begin is selected,
calibration fails about
1min later.
The calibration points are not in
conformity with monotonicity.
Re-calibration is recommended.
Relief valve
Gas cylinder
Tubing
AG module
Open to the air

Mindray A7 Specifications

General

Brand	Mindray
Model	A7
Category	Medical Equipment
Language	English