2
* Adjustment sensors.
Sensor-1 can be adjusted by using the Sensor Offset parameter 05 and Sensor-2 can be adjusted by
using the Sensor Offset parameter 06. Indicates a Sensor e.g. 2
C to much, the according Sensor
Offset has to be decreased with 2
C.
* Error messages.
On the display of the
ALFA 52-VS
the following error messages can appear:
E1
- Sensor-1 failure.
Solution E1, E2:
E2
- Sensor-2 failure.
- Check if sensor is connected correctly.
- Check sensor (1000
at 25
O
C)
- Replace sensor
EEE
- Settings are lost.
Solution EEE:
- Reprogram the settings.
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.
After reset alarm the differential temperature appears again in the display or the error-code
E..
alternates with extra indications as the temperature is out of measure range. These indications are;
‘
L
’ indicates a short-circuit sensor.
‘
H
’ indicates a open-circuit sensor.
Whereby the first segment is used to indicate these codes for Sensor-1 the second segment shows
‘-‘ and the last segment indicates the codes for Sensor-2.
F.i.;
L - -
Indicates a short circuit of Sensor-1 and Sensor-2 okay
- - H
Indicates a open-circuit of Sensor-2 and Sensor-1 okay
H - L
Indicates Sensor-1 with a open-circuit and Sensor-2 with a short-circuit
* Technical data ALFA 52-VS.
Type
: ALFA 52-VS Differential thermostat (Rail)
Range
: Differential temperature in display 0/+20
O
C (0,1)
Static range sens. : -50/+50,0
C, above -10
C read-out in 0,1
C or
-20/+80,0
C, above -10
C read-out in 0,1
C or
0/+100,0
C, read-out in 0,1
C
Supply
: 230Vac 50/60Hz (-5/+10%) or else see product sticker
Read-out
: 3-digit 7-segments display
Relays
: Ry1= SPST(NO)
250V/8A (cos
=1) or 250V/5A (cos
=0.4)
Ry2= SPST(NO)
250V/8A (cos
=1) or 250V/5A (cos
=0.4)
Ry3= SPDT(NO/NC)
250V/8A (cos
=1) or 250V/5A (cos
=0.4)
Relays have one common (C).
Control
: by push buttons on the front.
Front
: Polycarbonate
Sensor
: 2x SM 811/2m (PTC 1000
/25
C).
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.
