DF5991 polarity tester

F5991 speaker polarity tester main technical parameters:
Measuring pulse width: 0.4mS.
Measurement pulse amplitude: greater than 10Vpp.
Measurement sensitivity: the distance between the sensor and the speaker is not less than 25CM.
Judgment speed:0.2sec.
Sensing microphone: capacitive sound transmission microphone

Using the pulse determination method, suitable for any form, size, material, and impedance of speakers, headphones, and moving coil receivers test polarity.
Fast automatic discrimination.
Fully automatic LED or alarm indication.
Suitable for use on diaphragm production lines.
Plastic case, small and beautiful.
DF5991 speaker polarity tester main technical parameters:
Measuring pulse width: 0.4mS.
Measurement pulse amplitude: greater than 10Vpp.
Measurement sensitivity: the distance between the sensor and the speaker is not less than 25CM.
Judgment speed:0.2sec.
Sensing microphone: capacitive sound transmission microphone