Programming The Utilities - Chauvin Arnoux STATOP 4850 Manual De Instrucciones

Special function Alarm inhibited at the 1st fault: A1.SF = hoLd
With this function, the alarm remains inactive when the measured value reaches the alarm threshold for the first time. This allows
it to be neutralised when the temperature rises at start up of the installation. Once this first overshoot has occurred, the alarm behaves
normally, whatever type it is (high or low, absolute or following, symmetrical asymmetrical).
N.B. : It is the direction of the control which acts on the inhibited alarm. If control is in reverse, it is the low alarm that will be inhibited,
if the control is direct, the high alarm will be inhibited.
Example: inhibition used with low gap alarm.
SV
Special function Alarm held with inhibition at the 1st fault: A1.SF = Lt.ho
This special function combines the two preceding ones. Whatever the type of alarm, this is neutralised until the first overshoot occurs,
then it behaves like a held alarm.
Hysteresis: AHY.1
Example : No special function used with high gap alarm.
SETPOINT = 100°C, ASP1 = 10°C, AHY.1 = 4°C
SV+ASP1+1/2AHY1
SV-ASP1-1/2AHY1
3.6. UTILITIES PROGRAMME
This programme is used :
to define the behaviour of the instrument in case of incident (security),
to modify the level of access to the parameters,
to lock access to the parameters,
to work in manual mode,
and lastly to recalibrate the instrument.
Recalibration must only be undertaken if it is really essential, and by qualified personnel, equipped with the necessary
metrological equipment (see Ch. 4.1).
To access the utilities programme, press
Press and again to go forward in the programme. Without action on the keyboard, the instrument exits from the utilities
programme after a few seconds.
A1MD
d v .Lo
low gap
alarm
Alarm SV = Setpoint
SV
SV+ASP1
*
Without inhibition
the alarm
triggers when
heating
when switched on
112
SV+ASP1
110
108
Below
108°C
no alarm
and
SV
with alarm hold
No d' alarm
Alarm
initialised
SV = Setpoint
Alarm
*
Below Above
112°C 112°C
alarm
no alarm
simultaneously. The instrument displays hAnd Cont .
30
SV
SV+ASP1
*
Alarm
works
normally
112
*
110
108
Up to 108°C Below
The alarm continues
108°C
no more alarm
to function
Time
112
110
108