2
*Setting internal parameters.
Next to the adjustment of the set point, internal settings can be made like differential, sensor
offset, set point range and the functions of the thermostat.
Push the DOWN key for more than 10 seconds, to enter the 'Internal Programming Menu'. In the
left display the upper and lower segment are blinking. Over the UP and DOWN keys the required
parameter can be selected (see table for the parameters).
If the required parameter is selected, the value can be read-out by pushing the SET key. Pushing
the UP or DOWN key to change the value of this parameter.
If 20 seconds no key is pushed, the ALFANET 53 changes to the normal operation mode.
*Adjustment sensor.
The sensor can be adjusted by using the Sensor Offset parameter 05. Indicates a Sensor e.g. 2C
to much, the according Sensor Offset has to be decreased with 2C.
*Error messages.
On the display of the ALFANET 53 the following error messages can appear:
LO - Minimum alarm Thermostat.
HI - Maximum alarm Thermostat.
E1 - Sensor failure.
EE - Settings are lost. Solution EEE:
- Reprogram the settings.
-L- - In case of sensor short-circuit the display alternates between error-code E..
and -L-, as indication for a short-circuit sensor.
-H- - In case of open-circuit sensor the display alternates between error-code E..
and -H-, as indication for a open circuit sensor.
Reset Alarm. When an error-messages appears it can be reset by pushing the SET key.
The function of this key depends on parameter P42.
*Technical data.
Type : ALFANET 53 Alarmthermostat (Rail)
Range :-50/+50,0C, above -10C read-out in 0,1C
Supply : 230Vac 50/60Hz(-5/+10%)
Read-out : 3-digit 7-segments display
Relays : Ry1= SPST(NO) 250V/8A(cos =1) of 250V/5A (cos =0.4)
Ry2= SPST(NO) 250V/8A (cos =1) of 250V/5A (cos =0.4)
Ry3= SPDT(NO/NC) 250V/8A (cos =1) of 250V/5A (cos =0.4)
Relays have one common (C).
Control : by push buttons on the front.
Front : Polycarbonate
Sensor : SM 811/2m(PTC 1000/25C).
Dimensions : 90 x 71 x 58mm(hwd)
Panel cut out : 46 x 71mm (HW) at panel mount
Accuracy : ± 0,5% of the range.
- Provided with memory protection during power failure.
- Connections with screw terminals on the back side.
- Equipped with sensor failure detection.
- Special versions on request available.
