Mindray A8 - Page 170

6-8
9. The screen shown below is displayed upon successful calibration. Select Done to exit the
calibration screen.
NOTE
 If measurement deviations are not corrected after multiple flow sensor
calibrations, it is recommended that a flow sensor in the circuit be replaced and
then a calibration be performed for the new flow sensor. If the problem persists,
send the machine to the manufacturer for maintenance. After the problem is fixed,
perform the calibration and system tests.
6.3.1.3 Common Failures and Recommended Actions
Failure
Description
Possible Cause Recommended Action
Display 1
The valve output flow is
insufficient.
1. Check whether the gas supply is sufficient for
the whole calibration process. (T
he pipeline
gas pressure is not less than 345 kPa (50 psi).)
2. F
low calibration should only be performed
using pipeline gas supply.
3. Check whether the maximum output flow of
the valve is greater than 60 L/min. If not,
replace the drive gas assembly.
Display 2
The drive gas assembly is
nonlinear.
1. Replace the drive gas assembly.
2. Replace the VCM.
Display 3
The flow change is
nonlinear.
1.
Check whether the pipeline is connected
according to the instructions.