Polarity Tester 139B

Technical specification:

(1) Pulse measuring method.

(2) Polarity indicator :

(a) Green indicator : Positive polarity with beep sound.

(b) Red indicator : Negative polarity with no sound at all.

(3) Five touch switches :

(a) WF range : Suitable for measuring the polarity of woofer.

(b) M & T range : Suitable for measuring the polarity of midrange and tweeter.

(c) EXT.1 to EXT.3 : Used to select the instrument connected to the external terminal.

(4) Model***9B can be connected with Model****6C, to measure the buzz, rattle of a loudspeaker. Only one operator is needed.

(5) Measuring distance : 2 to 4 Cm. from the center point. of dust cover of the pre-measure loudspeaker.

(6) Measuring sensor : Uses ECM.

(7) Dimension ( m / m ) : *5 ( height ) x **5 ( width ) x **0 ( depth ).