Electric heating sheat applied in industrial sectors thermostatic heating, drying, and for other temperature test, is genetic, biological, pharmaceutical and health care, environmental protection, biochemical laboratory, analysis room, teaching and research of the necessary tools to the possibility of any equipment malfunction, in order to make the electric heating plate better work, reduce the number of failure, to increase its working efficiency. Small make up of the manufacturer of electric heating plate has carried on the detailed analysis to the typical fault, introduced the processing and summarized the idea of maintenance.
Failure 1: turn on the heating switch of the constant temperature heating table, the aluminum platform is not heated:
Reasons :1. The possibility of failure of heating sheat is great; 2. The heating switch is broken; 3, solid state relay is bad; 4. Broken temperature controller, detection and maintenance method:
Flat bottom cover:
1, the detection of heat pipe: first cut off the power supply of the whole machine, with the multimeter to ohm test the resistance of the heat pipe, the heat pipe is connected to the wire to cut it off each to test, the resistance of the heat pipe is generally dozens of ohms to 200 ohms or so. If the resistance is infinite or several ohms, the heating tube may be damaged and replaced.
2, test the heating switch: also to cut off the power supply of the whole machine, the multimeter to the buzzer, the switch to a word file, with the meter pen to measure whether the switch terminal is in the on state, both terminals are good, otherwise it needs to be replaced.
3, solid state relay, this will make constant temperature platform oh the power is connected, but be careful to get an electric shock, and then open the heating switch, look at solid state relay indicator is on or shine can be seen as solid state relay input is normal, if not bright with multimeter testing of solid state relay 3 a 4 side, look to whether have voltage 12 VDC, if it does not the thermostat is damaged. Then type the multimeter to the position of 750VAC and measure the 1-2 ends of the solid state relay with a pen. If the voltage of 220VAC is not changed, then the solid state relay can be damaged and replaced visually.
4. Test the temperature controller: the thermostatic platform is connected to the power supply, and the heating switch is turned on to see if the temperature controller is displayed normallyElectric heating applied in industrial sectors thermostatic hot samples of zhang compensate, drying, and for other temperature test, is genetic, biological, pharmaceutical and health care, environmental protection, biochemical laboratory, analysis room, teaching and research of the necessary tools to the possibility of any equipment malfunction, in order to make the electric heating plate better work, reduce the number of failure, to increase its working efficiency. Small make up of the manufacturer of electric heating plate has carried on the detailed analysis to the typical fault, introduced the processing and summarized the idea of maintenance.
Failure 1: turn on the heating switch of the constant temperature heating table, the aluminum platform is not heated:
Reasons :1. The possibility of failure of heating tube is great; 2. The heating switch is broken; 3, solid state relay is bad; 4. Broken temperature controller, detection and maintenance method:
Flat bottom cover:
1, the detection of heat pipe: first cut off the power supply of the whole machine, with the multimeter to ohm test the resistance of the heat pipe, the heat pipe is connected to the wire to cut it off each to test, the resistance of the heat pipe is generally dozens of ohms to 200 ohms or so. If the resistance is infinite or several ohms, the heating tube may be damaged and replaced.
2, test the heating switch: also to cut off the power supply of the whole machine, the multimeter to the buzzer, the switch to a word file, with the meter pen to measure whether the switch terminal is in the on state, both terminals are good, otherwise it needs to be replaced.
3, solid state relay, this will make constant temperature platform oh the power is connected, but be careful to get an electric shock, and then open the heating switch, look at solid state relay indicator is on or shine can be seen as solid state relay input is normal, if not bright multimeter is used to inspect the 34 end of the solid state relay, see whether there is voltage 12 VDC, if it does not the thermostat is damaged. Then type the multimeter to the position of 750VAC and measure the 1-2 ends of the solid state relay with a pen. If the voltage of 220VAC is not changed, then the solid state relay can be damaged and replaced visually.
4. Test the temperature controller: the thermostatic platform is connected to the power supply, turn on the heating switch, and check whether the temperature controller is displayed normally. If it is displayed normally as usual, put the multimeter into the dc level of 20VDC, and measure the voltage of 12VDC at the 3-4 ends of the solid-state relay.
This is the silicon electric heating sheet small summary of the fault detection and maintenance summary, hope will be helpful to you.
