① The transmitter has no output, check whether the transmitter power supply is reversed;

Connect the power supply polarity correctly

② Measure the power supply of the transmitter, whether there is 24V DC voltage;

Ensure that the power supply voltage to the transmitter is ≥12V(that is, the power input voltage of the transmitter is ≥12V). If there is no power supply, check whether the circuit is broken and whether the instrument is selected incorrectly (input impedance should be ≤250Ω); Let's wait.

(3) If it is integrated with the watch head, check whether the watch head is damaged (you can first short circuit the two wires of the watch head, if the short circuit is normal, it indicates that the watch head is damaged);

If the watch head is damaged, it is necessary to replace the watch head.

④ String the ammeter into the 24V power supply loop to check whether the current is normal;

If normal, it means that the transmitter is normal, and the other instruments in the loop should be checked to see if they are normal.