Air Jacketed CO2 Incubator
2-3
VWR International
Section 2
Calibration
1. Make sure the stabilization periods outlined above are followed.
2. Sample the chamber atmosphere through the sample port with an
independent instrument. Sample the atmosphere at least 3 times to
ensure accuracy of the instrument.
3. Press the MODE key until the CAL indicator lights.
4. Press the right arrow until “CO2 CAL XX.X” is displayed in the
message display.
5. Press the up /down arrows to change the display to match the
independent instrument.
6. Press ENTER to store the calibration.
7. Press the MODE key to return to RUN or the right or left arrows to
go to the next/ previous parameter.
Model VWR51014992 (VWR catalogue number 10810-944) has an
infrared (IR) CO
2
sensor. Infrared CO
2
sensors are not effected by
chamber atmosphere temperature or humidity. However, the light detector
in the sensor is effected by wide temperature changes. Therefore, changing
temperature setpoints could necessitate a recalibration of the CO
2
.
Chamber temperature should be allowed to stabilize before checking CO
2
concentrations with an independent instrument, especially on start-up.
IR CO
2
Sensor Stabilization Times
Start-Up
- Allow the temperature and the CO
2
of the cabinet to stabilize at
least 12 hours before proceeding.
Presently Operating
- Allow CO
2
to stabilize at least 2 hours at setpoint
before proceeding.
Thermal Conductivity
CO
2
System (continued)
Infrared CO
2
System
