Calorimeter / big card machine: common reasons for ignition failure - Database & Sql Blog Articles

Probe current voltage pin 420*4450, head diameter 5.0, over current and voltage pin

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A calorimeter is a type of coal testing equipment used to measure the calorific value of coal. It is also commonly referred to as a calorimeter or a big card machine. One of the most common issues users encounter is ignition failure. This problem can be caused by several factors, including: A) a broken ignition wire, B) poor contact at the electrode, C) rusted electrodes, D) a faulty relay, or E) a coal sample with too low a heat value to ignite properly.

1. Check if the stirring function is working normally.

2. Is the ignition fuse behind the calorimeter blown?

3. Check if the calorimeter probe shows a normal temperature reading.

4. Inspect the oxygen bomb ignition electrode for dirt or rust.

5. Make sure the inner cover is in proper contact with the oxygen bomb head.

6. Use a multimeter to check the ignition voltage. If no voltage is detected, it could indicate a problem. Possible causes include: 1) the 24V neutral wire from the transformer is not properly connected to the outer casing, 2) the 24V fuse from the transformer is not connected to the inner cover terminal, or 3) the third terminal on the control ignition relay is damaged.

Prepare spare parts such as different types of relays, replacement inner cover electrodes, and a 1-meter ignition wire.

After performing a test, it was found that there was no 24V ignition voltage. However, when the relay output on the back cover was turned on, 24V was detected, indicating an open circuit between the relay and the inner cylinder cover electrode, or between the transformer and the outer cylinder casing. Upon inspection, it was discovered that the inner cylinder cover electrode had poor contact due to rust. The issue was resolved by welding the connection.