What's wrong with a multimeter that doesn't respond to a capacitor?
One, the capacitor has been disconnected. We know that the multimeter to measure capacitance, mainly as a DC power supply and ammeter to use the multimeter. When the capacitor is connected to the DC power supply circuit in a moment, the capacitor is in the charging state, the ammeter will have an indication (that is, the multimeter has a reaction). If, at this time, the multimeter does not respond, there is only one possibility, that is, the capacitor has been disconnected (i.e., disconnected).
Second, the batteries in the multimeter has been depleted. This problem is good to check, the multimeter to ohm file (any file can be), will be red, black two pens touch, such as the multimeter does not indicate or the pointer does not move (pointer multimeter), that the battery has been exhausted. If the multimeter has instructions or pointer to zero, that the battery is still electric.
If the multimeter has a measurement of capacitance capacity of the gear, usually in the measurement of capacitance, the capacitance must be discharged, otherwise it is easy to damage the multimeter, resulting in the multimeter is not allowed to test or no display, with the resistor to measure the capacitance of a different story!
How to measure the power of a heat pipe with a multimeter
The heat pipe can be regarded as a pure resistive load, and the current flowing through the heat pipe is the pure active current. With the AC current measurement function of the clamp multimeter to measure out the current when the heater is working. With the current value multiplied by the rated voltage of the heating tube to arrive at the value is the power of the heating tube (wattage).
For example, an electric heating tube rated voltage is 220 volts, the measured current is about 2 amps, then the power of the heating tube is about four hundred and forty watts. If the rated voltage of the heater is 380 volts and the measured current is about 1 amp, then the power of the heater is about four hundred watts.
One thing to keep in mind here is the rated voltage of the heating tube. A heater rated at 220 volts plugged into 380 volts will quickly burn out the heating wire because of the high voltage. Conversely, the rated voltage is 380 volts of the heating pipe into the 220-volt voltage, will not reach the rated voltage and not reach the rated power.
In actual production, often 220-volt and 380-volt electric heating tube are applied, order electric heating tube, it is best to let the manufacturer use the steel seal in the heating tube shell on the rated voltage. To avoid confusion.
