On 2018-08-08 14:48:54
If the vacuum heat treatment furnace stable abnormal what kind of situation?
The temperature of the vacuum heat treatment furnace is abnormal, including the alarm that the temperature is too high, or the display temperature cannot reach the set value, so what shall we do?
First, if the vacuum heat treatment furnace is too high temperature alarm failure, then we first check whether the operating area of the constant temperature parameters are normal, see other normal use of the thermostat all parameters. According to the circuit diagram to see whether the corresponding operation area of the solid state relay output breakdown, with the method: power, with the multimeter resistance measurement solid state relay output resistance between two points, the normal resistance will reach a few megawatts or higher, if it is a breakdown, almost no resistance, it is necessary to replace with the same type of new type.
Second, we need to check whether the thermocouple in the corresponding operation area of the vacuum heat treatment furnace is damaged. To view these thermocouples, connect the thermocouple on the thermostat to the thermostat and investigate the temperature display. If the thermocouple is indeed damaged, it is necessary to replace it. If there is no problem with the thermostat or thermocouple, the heating tube needs to be tested for normal operation.
Third, in the vacuum heat treatment furnace starting power, the hand vibration thermocouple probe in the corresponding operation area, check whether the corresponding thermostat shows a large range of beating, if this phenomenon, the thermocouple probe contact is bad, the need to replace the new. When the display temperature of vacuum heat treatment furnace is lower than the set value, check whether the temperature controller parameters in the operation area are normal and whether there is output signal.