Page - IOM / @DNOVA-µAC-0907-E
= probe parameters
1 Presence external air probe B2.
Sets the presence of probe NTC B2, the corresponding function
must be selected using parameter HC.
0= probe absent
1= NTC Carel probe
Range: 0÷1 flag Def.: 0
2 type of probe B3
Sets the type of probe B3 (0-20mA, 4-20mA, 0-1V).
n.B. this setting must also be accompanied by the setting
of the jumper (B3 selection - see Fig. 3).
The corresponding function must be selected using parameter
Hd.
0= probe absent
1= 0÷1V or 0÷20mA
2= 4÷20mA
Range: 0÷2 flags Def.: 0
3 Presence supply air probe B4
Sets the presence of NTC probe B4.
0= probe absent
1= NTC Carel probe (also enables the corresp. alarm in cooling
function, see parameter Pd.)
Range: 0÷1 flag Def.: 0
4 Minimum value measured by input B3 at 0mA, 4mA
or 0Vdc
This parameter allows the configuring of the minimum value
for probe B3.
Range: 0÷/5%rH, bar Def.: 0
5 Maximum value measured by input B3 at 20mA or
1Vdc
This parameter allows the configuring of the max. value for
probe B3.
Range: /4÷100%rH, bar Def.: 100
6 calibration input B1
Corrects the value measured by B1.
Range: -6.0 ÷ 6.0°c -10.8 ÷ 10.8°F Def.: 0.0
7 calibration input B2
Corrects the value measured by B2.
Range: -6.0 ÷ 6.0°c -10.8 ÷ 10.8°F Def.: 0.0
8 calibration input B3
Corrects the value measured by B3.
Range: -10.0 ÷ 10.0%rH, bar Def.: 0.0
9 calibration input B4
Corrects the value measured by B4.
Range: -6.0 ÷ 6.0°c -10.8 ÷ 10.8°F Def.: 0.0
A Digital filter
Stabilises the coefficient used in the digital filtering of the
measured value. High values for this parameter allow the
elimination of any transitory disturbance at the analogue inputs
(yet diminish the speed of measurement). The suggested
value is 4.
Range: 1÷15 Def.: 4
b Input limit
Stabilises the maximum variation which can be measured
by the probes in a machine program cycle; in practice, the
maximum variations allowed in the measurements are between
0.1 and 1.5 units (bar, °C or °F depending on the probe and
the unit of measure) per second approximately. Low values for
this parameter allow the effect of impulsive-type disturbance
to be limited. Suggested value 8.
Range: 1÷15 Def.: 8
c Unit of measure
Sets the unit of measure for the temperature displayed. On
changing this parameter the µAC
automatically
performs
the conversion of all the configuration parameters (set point,
differentials, maximum limits etc.), except for F5 and F6.
The display always indicates the unit in use.
0= degrees Centigrade (°C) used.
1= degrees Fahrenheit (°F) used.
Range: 0÷1 flag Def.: 0
note: if the variation from centigrade to Fahrenheit, and
vice-versa, is performed by the supervisor, the parameters
are not converted (only the value read by the temperature
probes and the symbol on the display change).
DESCRIPTION AND CONFIGURATION OF THE PARAMETERS
