Thermo Scientific Heracell Vios 160i CR, Operating Instructions Manual

Page: 99 / 216

6
Handling and Control
Auto-Start Function
Thermo Scientific
Heracell Vios 160i / 250i CR
6-13
Notes on using the auto-start routine:
To ensure that the specified accuracy of the CO
2
measuring system is maintained, the device should
always be started using the auto-start routine if:
• a difference of more than 1 °C is entered upon setting the temperature set value,
• the Low Humidity function is enabled/disabled,
• the device is restarted after an extended interruption of operation.
The auto-start routine should be run at least every three months on the occasion of cleaning and
maintenance works.
Duration of the auto-start routine:
Running the auto-start-routine usually takes 5 to 7 hours. At low room temperatures and when the
device is cold, it may take up to 10 hours until the auto-start routine has been completed. If the glass
door is opened or if the power supply of the device is interrupted while the auto-start routine is
running, the routine is interrupted and rerun after the glass door has been closed or the power supply
has been reestablished.
Causes for the failure to start the auto-start routine:
Prior to running the auto-start routine, set the CO
2
and O
2
(optional) set values to the desired values

and make sure that the atmosphere in the work space only consists of ambient air. The water reservoir
in the workspace must be filled sufficiently with water.
Inhibition of the auto-start routine:
The auto-start routine will not start if any of the following error conditions exists.
Temperature control loop:
• Sensor breakage,
• Actual value high, exceeding set value (excessive deviation),
• Actual value low, falling short of set value (excessive deviation),
• Actual value not plausible
• Calibration values too high or too low,
• No communication with sensor.
Gas supply CO
2
control loop:
• No communication with sensor.

In this case, the auto-start key is dimmed and its function is not available.