Cod. +030220151 - Rel. 2.1 - 04/09/98
8
Selection of the main working parameters
Setting the main working parameters - Ambient set-point
The factory set-point is 0ºC. Should you need a different value, more suitable to your specific application
requirements, observe the following instructions:
• press
for 1 second: the set-point value will appear on the display;
• after a while, the value will begin to flash;
• increase or decrease the set-point using the and/or keys until you reach the requested
value;
• press
again to confirm the new value;
Setting the differential (hysteresis of the regulator)
The factory-set differential is 2ºC. Should you need a different value, more suitable to your specific
application requirements, operate as follows:
• press for more than 5 seconds (in case of active alarm, silence the buzzer first);
• the code of the first modifiable parameter (/C) appears on the display;
• press either or
until the code 'rd' appears;
• press to display the relative value;
• increase or decrease the value using either the or buttons until you reach the requested
value;
• press again to confirm temporarily the new value and display the code of the parameter;
• press to memorize the new value and exit the procedure.
Other important parameters
For all the models:
As indicated above, all Infrared instruments have been programmed to detect both the high and the low
temperature alarm. In the event of abnormal conditions the internal buzzer (if present) will sound and the
display will show the code of the alarm, that is 'HI' for high temperature, 'LO' for low temperature.
High/Low temperature alarms are generated by abnormal temperature conditions:
• high temperature alarm: the temperature measured by the ambient sensor is 'AH' degrees (or more)
above the set-point: ambient temperature > set-point + AH;
• low temperature alarm: the temperature measured by the ambient sensor is 'AL' degrees (or more)
below the set-point: ambient temperature < set point - AL.
On the basis of the default values, AL = 10 and AH = 10.
In the event of a temperature alarm, the relative message will be delayed for 120 minutes (Ad = 120). After
that the 'HI' or 'LO' alarm will be generated. No alarms will be generated if normal temperature conditions are
restored within the Ad time-interval (the temperature should range within +/-10 degrees of the selected set
point).
While installing the unit, the temperature might take more than 120 minutes (Ad time) to range between the
set limits. Consequently the temperature alarm will be generated. In order to avoid this problem, we suggest
- during this stage only - increasing the Ad time-interval, by increasing the value of the Ad parameter.
To Next Page
Loading...
Need help?
General
