Common Faults and Causes of Clamp Ammeters
No indication or inaccurate indication
(1) Reason for malfunction:
a. Low battery level: Clamp on ammeters usually require built-in battery power supply. If the battery level is low, it may cause the instrument to malfunction or the indication to be inaccurate.
b. Improper selection of measurement range: If the selected measurement range does not match the magnitude of the measured current, it may also result in inaccurate indication.
c. Poor contact between the jaws: Poor contact between the jaws and the measured wire can cause loss of magnetic flux, which in turn affects the measurement results.
d. Coil malfunction: If the coil of the clamp ammeter malfunctions, such as wire breakage, short circuit, etc., it can also lead to inaccurate measurement.
(2) Solution:
a. Check the battery level and replace the battery in a timely manner.
b. Select the appropriate measurement range to ensure it matches the magnitude of the measured current.
c. Clean the jaws to ensure good contact with the tested wire.
d. Check and repair coil faults, such as replacing damaged coils.
Display screen malfunction
(1) Reason for malfunction:
a. Low battery level: Insufficient battery level may cause the display screen to malfunction.
b. Display screen damage: Prolonged use or improper operation may result in display screen damage.
c. Loose or broken connecting wires: Loose or broken connecting wires between the display screen and the motherboard may also cause display screen malfunctions.
(2) Solution:
a. Check the battery level and replace the battery in a timely manner.
b. Replace the damaged display screen.
c. Check and reconnect the connection wires between the display screen and the motherboard.
Excessive error
(1) Reason for malfunction:
a. Magnetic field interference: The magnetic field interference from the surrounding environment may lead to measurement errors that are too large.
b. Temperature effect: Clamp on ammeters operating in high or low temperature environments may result in larger errors.
c. Instrument aging: Long term use or improper operation may cause internal components of the instrument to age, thereby affecting measurement accuracy.
(2) Solution:
a. Try to avoid using clamp ammeters in strong magnetic field environments.
b. Pay attention to the ambient temperature to avoid excessive or insufficient temperature affecting the instrument.
c. Regularly maintain and calibrate the instruments, and replace aging components in a timely manner.
