Mindray BeneView T5, Service Manual

Page: 43 / 206

3-11
5. Adjust the relief valve and make sure the flowmeter reading is stable and within 10 and
50 L/min.
6. Check that the concentration of each composition meets the specification stated in the
Operator's Manual.
Calibration
Tools required:
„ Gas cylinder with a certain standard gas (such as 6 ± 0.05% CO
2
, Bal N
2
), or standard
gas mixture. Gas concentration should meet the following requirements: AA ≥ 1.5%,
CO
2
≥ 1.5%, N
2
O ≥ 40%, O
2
≥ 40%, of which AA represents an anesthetic agent (Des,
Sev, Enf, Iso, or Hal). a/c ≤ 0.01 (a is the gas absolute concentration accuracy; c is the
gas concentration)
„ T-shape connector
„
Appropriate tubing
Follow this procedure to perform the pressure calibration:
1. Select [ Main Menu ] → [ Maintenance >> ] → [ User Maintenance >>] → enter the
required password → [ Calibrate AG >> ] to access the [ Calibrate AG ] menu.
2. Check the airway and make sure that there are no occlusions or leaks.
‹
Vent the sampling tubing to the air and check if the [ Current FlowRate ] and [ Set
FlowRate ] are approximately the same. If the deviation is great, it indicates that
there is an occlusion in the tubing. Check the tubing for an occlusion.
‹ Check the airway and make sure that the airway has no leakage.
3. Connect the test system as follows:
Monitor
Cylinder
Flowmeter
Relief valve
T-shape connector
Sampling line