Edition 1.01
– December of 2021
Thermo-Shaker for Microtubes and PCR Plates PCMT Plus
Page 10
Operating manual
6. Calibration
6.1.
The device is precalibrated at the factory (calibrating coefficient is 1.000) for operation with tempera-
tures measured by a sensor in the heating block.
6.2.
To change the calibration coefficient, hold the
RUN/STOP
key pressed for more than 8 s to activate
calibration mode, as shown on figure 4).
Figure 4. Display in calibration mode: 1. Calibration mode indicator;
2. Calibration coefficient; 3. Temperature with current coefficient
Note.
Values marked in grey on figures 4 and 5 are not used in calibration and are meant
for service engineers.
6.3.
Restoring factory settings.
Set 1.000 value using the ▲ and ▼
T, °C
keys as shown on fig. 4/1 to
restore the factory settings. Press the
►/■ RUN/STOP
key once to save the changes and exit the
calibration mode.
Note.
Coefficient value changes are recommended after the unit has rea
ched 30°C tem-
perature.
6.4.
Calibration procedure
. To calibrate the unit, use an independent sensor with 0.5°C accuracy,
which can fit in the cell of the block.
6.4.1. Install the sensor into a cell of the block.
6.4.2. Set the required temperature in operation mode (e.g. 4
0°C).
6.4.3. After the unit reaches the set temperature (when the set and current temperature readings equal),
leave the unit for 30 min for thermal stabilization.
6.4.4.
Let us assume that the readings of independent sensor is 39°C, but the display’s actual temperature
is 40°C. Then, it is necessary to add 1°C correction.
6.4.5. Hold the
RUN/STOP
key pressed for more than 8 s to activate calibration mode (figure 4).
6.4.6.
Using the ▲ and ▼
T, °C
keys, change the calibration coefficient (fig. 5/1) so that the new temperature
value (fig. 5/2) corresponds to the independent sensor temperature. In our example, the calibration
coefficient will be 0.974.
Note.
Calibration coefficient can be changed
in range from 0.936 to 1.063 (±0.063), with
increment of 0.001. This calibrating coefficient will correct temperature through all
the operation range.
Note.
Coefficient value changes are recommended after the unit has reached 30°C
temperature.
1.1.1. Press the
►/■ RUN/STOP
key once to save the changes and exit the calibration.
6.5.
The display will show calibrated temperature as shown on fig. 6/1 and the unit will continue thermal
stabilization according to the previously set temperature.
Figure 5. Changing the coefficient:
1. Calibration coefficient; 2. Temperature
with current coefficient
Figure 6. Display after calibration:
1. Set temperature; 2. Current calibrated
temperature
