VDH ALFANET 30, Руководство пользователя

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* Setting internal parameter.
To adjust the sensor-offset use the following instructions;
By pushing the
DOWN
key more than 10 seconds, you enter the ‘internal programming menu’. In
the left display the upper and lower segments are blinking. Over the UP and DOWN keys the
required
parameter can be selected (see table for the parameters). In this case only ‘04’ offset
temperature sensor.
If the required parameter is selected, the value can be read-out by pushing the
SET key. Pushing
the UP and DOWN keys together with the SET key allows you to change the value of this
parameter.
If after 20 seconds no key is pushed, the
ALFANET 30 changes to its normal operation mode.
* Adjustment sensor.
The sensor can be adjusted by using the Sensor Offset (parameter 04). Indicates the ALFANET
30 e.g. 2°C too much, the Sensor Offset has to be decreased by 2°C.
* Error messages.
In the display of the ALFANET 30 the following error messages can appear:
E1 - Sensor broken Solution:
- Check if the sensor is connected correctly.
- Check the sensor (1000
Ω/25°C).
- Replace the sensor.
EE - Settings are lost. Solution:
- Reprogramme the settings.
-L- - In case of sensor short-circuit the display alternates between error-code E1
and -L- , as indication for a short-circuit sensor.
-H- - In case of open-circuit sensor the display alternates between error-code E1
and -H- , as indication for a open circuit sensor.
* More information of the ALFANET 30.
- Provided with memory protection during power failure.
- Connection with screw terminals on the backside.
- Equipped with self test function and sensor failure detection.
- Special versions are available upon request.