Mindray VS-900, Operator'S Manual

Page: 137 / 192

16-9
5. Open the relief valve to vent standard CO
2
and make sure that there is an excess gas
flow through the T-shape connector to air.
6. Check the realtime CO
2
value is within 5.0±0.3% in the [ Calibrate CO2 ] menu.
16.6.3 Calibrating CO
2
For the CO
2
module, a calibration is needed every year or when the measured values have
a great deviation. Calibration for the CO
2
module can be performed only when the
module enters the full accuracy mode.
WARNING

Connect an exhaust tube to the gas outlet connector of the monitor to remove
the calibration gases to a scavenging system.
Tools required:

A steel gas cylinder with 5±0.03% CO
2
and
balance
gas N
2
(P/N 0075-00-0033-01)

T-shape connector

Tubing
Follow this procedure to perform a calibration:
1. Make sure that the CO
2
module has been warned up or started up.
2. Check the airway for leakage and perform a leakage test as well to make sure the
airway has no leakage.
3. Select [ Main ]
→
[ Maintenance >> ]
→
[ User Settings >> ]
→
enter the required
password
→
[ Module Maintenance >> ]
→
[ Calibrate CO2 >> ]
→
[ Zero ].
4. After the zero calibration is finished successfully, connect the equipment as follows:
Monitor
Gas cylinder
Open to the air
Relief valve
Tubing
T-shape connector