CD3000S
1PH from 10A to 90A
User’s manual
23
7.2 Heater break Calibration procedure (only with the HB option)
An automatic function sets the Heater Break Alarm.
The auto setting function can be activated using the “CAL” button on front unit, or supply with 12-24Vdc the
digital input “Cal Ext.” (See Diagram of control connection).
The Heater Break calibration procedure is performed in this way:
• CD3000S gives the maximum voltage output
• all LEDS are on, this means that calibration procedure is active
• The values of voltage and current are stored in memory
• After a minute the CD3000S comes back to the initial situation.
If load current decreases for partial or total load failure (sensitivity 20%) the yellow LED become ON and alarm
relay change status.
If CD3000S is still in conduction with no input signal (LED green OFF) it means that there is a short circuit on
thyristors and red LED (SC) become ON.
If the load has been changed the Heater Break calibration procedure must be done again.
