2
* Viewing setpoints.
Viewing set point of maximum alarm:
By pushing the
SET
key first and then the
UP
key together the maximum alarm set point appears
in the display. The led 'set high' starts blinking.
Viewing set point of minimum alarm:
By pushing the
SET
key first and then the
DOWN
key together the maximum alarm set point
appears in the display. The led 'set low' starts blinking.
A few seconds after releasing the keys the set point disappears and the measured temperature is
shown in the display.
* Changing set points.
Push the
SET
key together with the
UP
or
DOWN
key and the maximum alarm set point or minimum
alarm set point appears in the display. Release both keys.
Now push and hold the
SET
key again and together with the
UP
or
DOWN
keys the set point can be
changed. A few seconds after releasing the keys the measured temperature is shown again in the
display.
* Setting internal parameters.
Next to the adjustment of the setpoint, some other internal settings are possible, sensor-offset, relay
function and alarm settings.
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. With 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
and
DOWN
keys, allows you to change
the value of this parameter. If after 20 seconds no key is pushed, the
ALFA(NET) 23 DP
changes to
it's normal operation mode.
* Parameter ALFA(NET) 23 DP.
Para-
meter
Description Parameter
Range
Standard
Value
04
Offset temperature sensor
-15.0..+15.0
C
0.0
10
11
Startup delay after power failure
Relay on at sensor failure
0..99 Minutes
0 = No, 1 = Yes
0
0
21
22
23
24
25
26
27
28
Differential maximum alarm
Differential minimum alarm
Time delay maximum alarm
Time delay minimum alarm
Offset setpoint High (Max.)
Offset setpoint Low (Min.)
Relay alarm function
(0=watchdog 1=regulated alarm)
Auto reset alarm after temperature recovering
(0=hold)
0.1..15.0
C
0.1..15.0
C
0..99 Minutes
0..99 Minutes
-10.0/+10.0
C
-10.0/+10.0
C
0 = No, 1 = Yes
0 = No, 1 = Yes
1.0
1.0
0
0
0.0
0.0
0
0
90
95
96
97
98
99
Network number
(Only at ALFANET)
Software version
Production year
Production week
Serial number (x1000)
Serial number (units)
1..250
0..255
00..99
1..52
0..255
0..999
1
-
-
-
-
-
