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Eppendorf I-26R Large Stackable Incubator Shakers User Manual

Page 33

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33

New Brunswick

Operating Manual

8.6 Temperature

Setpoint

Press the

SELECT KEY

until the function

C INDICATOR

illuminates. The temperature can

be set from 5

C above ambient temperature to 60C (non-refrigerated units) or from 4C

to 60

C (refrigerated units). Increasing or decreasing the setpoint is accomplished with

the

or

KEY

. Ambient temperature is measured one meter from the front of the unit.


During operation, if the temperature of the chamber is more than 1.0

C higher or lower

than the temperature setpoint, an alarm is triggered. This alarm consists of a flashing

C

INDICATOR

and audible beep. The alarm will automatically deactivate as the unit

achieves the set temperature.

8.7

Temperature Offset Calibration

The temperature probe and the temperature controller are calibrated together at the
factory. The temperature probe measures the temperature of the air at the probe’s
location, near the heat exchanger return vent. The controller uses the probe input to
adjust air temperature, up or down, to match the temperature setpoint.

Depending on various conditions within the chamber, such as flask placement and size,
the heat produced by growing organisms, heat losses due to liquid evaporation from
flasks, etc., the display temperature may differ from temperatures within the flasks
themselves.

If you wish to have the temperature display (“Indicated Temperature”) match the
temperature at a given point, or match the average of a series of points within the
chamber (“Actual Temperature”), proceed as follows:

1. Let the unit equilibrate at or near the desired temperature. Record the Indicated

Temperature.

2. Record the Actual Temperature.
3. Calculate the temperature correction value: Actual Temperature – Indicated

Temperature = Temperature Correction Value.

4. Press the

SELECT KEY

until the function

C INDICATOR

illuminates.

5. Simultaneously press the

or

KEY

. The display will indicate

CAL

.

6. Using the

or

KEY

, enter the Temperature Correction Value calculated in Step 3

above.

7. Simultaneously press the

or

KEY

to save the Temperature Correction Value to

memory.


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