Laboratory furnace installation and maintenance

Laboratory furnace is a relatively complex mechanical equipment, when installed after going to follow the instructions on the details, and if not installed in place can cause devastating damage to laboratory furnace, and even greater harm.
Laboratory furnace installation played five steps:
1 First, check the drawing accessories: Before installation check first by basic design to meet the requirements. Check the stove accessories are complete. Whether there is damage during transport, lining without cracking and collapse, and the heating element has shorted out put bricks phenomenon.
(2) whether the short circuit resistance: laboratory furnace before drying, apply a multimeter to measure the heating element and the furnace shell resistance, does not allow short circuit. After drying, apply 500V megger cold insulation resistance value is not less than 0.5MΩ. Resistance furnace operating voltage exceeds 36V, there should be a good grounding devices.
3. Electronic control, temperature control should be arranged in the furnace side refused, not too far away from the stove, the control cabinet door is greater than 600mm from the wall bracket is anchored component. Various gas waterway according to the provisions painted different colors to show the difference. Flammable or explosive gas source should be placed in a dedicated secure isolation room.
4 outer furnace shell exposed live parts and transmissions should be added to protect the casing, in order to ensure safe and reliable operation, to set the necessary protective measures, such as overcurrent relay, pressure switch and automatic circuit breaker and so on.
5 Pit laboratory furnace is usually installed in the ground pit lid elevation on the ground about 500mm. Stove main circuit cable and thermocouple wire should be laid in the trench, on top cover plate.
Laboratory furnace repair and maintenance
Type silicon carbide furnace, silicon carbide found damaged, should be replaced by standard resistance values ??similar contrast and a new silicon carbide. Change ends when the first maintenance cover and remove the silicon carbide chuck, then remove the damaged silicon carbide, silicon carbide as easily broken, the device should be careful when both ends of the furnace shell exposed parts should be equal, Chuck must fastening, making good contact with the silicon carbide.
If there is severe oxidation chuck should get a new one. Silicon carbide devices at both ends of the slit holes using asbestos rope infarction. Not exceed the maximum temperature of the furnace temperature mission 1350 ℃. Silicon carbide rod V-type mixer at the lowest temperatures allow another task four hours. Very long time in the furnace after use, such as hair conditioning clockwise to the maximum heating power conditioning knob position, the heating current is still stagnant. Small additional value interval labeling machine farther reach the required heating power, explaining silicon carbide has aging.
Box muffle furnace in time do not change connection assembly of silicon carbide, just change connection, and then changes to laws, to pay attention to when using a muffle furnace heating power conditioning knob slowly conditioning, heating current value must not exceed the additional values.