SciCan STATIM 2000 Service Manual page 123

5. STAT IM 2000S Calibration
7. If they are not, then the unit may be fine-tuned as follows:
These units have a two-stage pressure offset and the upper offset can be modified during
the sterilization phase of the calibration. This will NOT affect the lower offset value BUT if
you subsequently change the lower value after the unit has vented then you will lose the
upper value as this will be reset to the same value as the lower offset.
If the actual chamber pressure reading on the LCD (PPP.P) is different by more than 1 kPa
from the pressure reference meter reading then this can be adjusted using the lefthand
arrow keys. If this adjustment corrects the PPP.P reading to within 1 kPa of the TTT.T
reading then the unit is now in equilibrium.
If these readings are still not within 1 kPa of each other, further adjustment may be
undertaken by modifying the TTT.T value.
The theoretical pressure reading (TTT.T) and actual chamber temperature reading (CCC.C)
are directly related and when the actual temperature value is increased or decreased, the
theoretical pressure value will also increase or decrease respectively.
Adjust the theoretical chamber pressure (TTT.T) and actual chamber temperature readings
(CCC.C) using the righthand arrow keys to correct the TTT.T value so that it is within
1 kPa of PPP.P.
IMPORTANT – now re-check the actual temperature reading (CCC.C) with the reading on
the temperature reference meter. The readings need to be stable, so allow sufficient time
to compare them.
The unit is in equilibrium and the calibration is complete when you are confident that the
temperature readings are still within ±0.25°C.
If the readings are outside of the ± 0.25°C tolerance, further diagnostics may be required
prior to re-calibration.
8. Press the STOP button when finished.
2. Switch off the unit and remove all calibration equipment.
STAT IM 2000/2000S
STATIM 2000/2000S/2000 G4 Service Guide
Service Guide
96-108639 Rev 3.0
Page 121