Thermo Scientific Heracell 150i, Руководство по эксплуатации

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Operating Instructions | HERAcell® 150i / 240i
10 Maintenance 10 Maintenance 10 Maintenance
113
50115191 A / 08.2009
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.
10.5 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The measuring sample is withdrawn through the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 the device on using the power switch.
2. Set the CO
2
set value and start the device with
auto-start.
3. Insert the measuring instrument probe through
the measurement opening [1] into the work
space. Wait until the CO
2
value displayed by the
instrument has stabilized.
Fig. 71: Preparing
CO
2 calibration