HEATER MONITORING TO PREVENT BREAKING HEATERS
- Preventing accident
- Decreasing number of maintenance
- Increasing productivity
It is necessary special knowledge and experience to know that heater will be broken . This system can be analyzed when heater will be broken
without any special knowledge.
heater condition is analyzed by continuance monitoring heater’s resistance
ZE7201A automatically take heater’s resistance data hence heater maintenance timing will be decreased.
The above graph is sample of resistance trend of a SIC heater.
Especially SIC heater’s resistance more and more increasing when heater’s operating time is increasing.
FOR YOUR ACTION
- HEATER BREAK ALARM
- HIGH REMIT(HAL) ALARM
- HIGH HIGH LIMIT ALARM(HHA)
- RAPID CHANGING RESISTANCE VALUE LIMIT ALARM(CRH)
Alarms can help your decision of heater replacement. Replacing heater by Appropriate timing make increasing productivity.
1) Alarm type and Heater situations
|Alarm||Rapid changing resistance value limit alarm||High limit Alarm||High High Limit Alarm||Heater Break Alarm|
|Situation||heater has been broken partially||Heater will be broken||Heater will be broken immediately||Heater has been broken|
|Actions||Prepare heater replacing||Prepare heater replacing||Replacing Heater||Replacing Heater|
2) When it is alarmed
(1) HEATER BREAK ALARM
It is alarmed when No heater signal more than 1 min.
No Heater signal =Input Voltage : More than 10% or Range and Input Current : Les than 3% of rated input
(2)HIGH REMIT(HAL) &HIGH HIGH LIMIT ALARM(HHA)
It is alarmed when resistance value is over than setting Value .
ZE7201 will be only alarmed when heater’s temperature is in temperature range which is set,
(3) RAPID CHANGING RESISTANCE VALUE LIMIT ALARM(CRH)
It is alarmed when resistance increasing rate is over than setting value.
(4) HIGH TEMPERATURE LEVEL ALARM(TEP)
It is alarmed when heater’s resistance is 5% over than setting value (Heater’s resistance value) when heater’s temperature is in specified value (Heater’s maximum temperature)