9
Maintenance
Preparing the CO2 calibration
Thermo Scientific
S
TERI-CYCLE
i160
/
i250
9-5
• The system returns to the main menu. The temperature displays shows the actual value currently
measured in the workspace.
Value reset:
If the value isn’t changed within the next 30 seconds, the system automatically exits the menu, and the
most recently confirmed value is preserved.
Preparing the CO
2
calibration
To determine the exact measured value of the device-integral CO
2
sensor, a CO
2
comparison
measurement has to be performed every three months.
If a major deviation is found during this check, a CO
2
calibration is required.
During this process, the CO
2
control of the device is set to the value measured during the comparison
measurement. Use a calibrated measuring instrument with an accuracy of < ± 0.3 % CO
2
for this test.
Suitable instrument:
• Portable IR readout instrument.
The measuring sample is withdrawn through the sealable measurement opening of the glass door.
The comparison measurement must be performed when the device is completely heated up.
Comparison measurement procedure:
1. Turn on the device using the power switch.
2. Adjust the CO
2
set value and wait until the unit has fully heated up and developed the correct
humidity level.
3. Insert the measuring instrument probe through the measurement opening into the workspace.
Wait until the CO
2
value displayed by the instrument has stabilized.
4. For devices equipped with the optional gas-tight screen, the measurement opening is located:
• with
S
TERI-CYCLE
i160
in the center gas-tight screen,
• with
S
TERI-CYCLE
i250
in the left or center gas-tight screen.
5. Remove the measuring probe, plug the measurement opening and close the doors.
6. Calibrate the CO
2
control.
Note
Excessive workspace temperature:
Excessive workspace temperatures after the calibration can be reduced by leaving the doors open for
approx. 30 seconds.
Note
IR measuring cell:
For devices with infrared (IR) measuring cells, the
2
calibration can only be performed when the
CO
2
concentration has been set to 4.0% CO
2
or more.
Calibration should be performed with the CO
2
set value designated for the work process
(prospective work process value).
Содержание STERI-CYCLE i160
Страница 8: ...Table of Contents 6 STERI CYCLE i160 i250 Thermo Scientific ...
Страница 12: ...Figures 4 STERI CYCLE i160 i250 Thermo Scientific ...
Страница 76: ...5 Operation Starting operation 5 6 STERI CYCLE i160 i250 Thermo Scientific ...
Страница 128: ...6 Handling and control Measures after power outage 6 52 STERI CYCLE i160 i250 Thermo Scientific ...
Страница 154: ...9 Maintenance Replacing the Door Seal 9 12 STERI CYCLE i160 i250 Thermo Scientific ...
Страница 166: ...11 Specifications STERI CYCLE i250 11 10 STERI CYCLE i160 i250 Thermo Scientific ...
Страница 196: ...13 Device log 13 2 STERI CYCLE i160 i250 Thermo Scientific ...