Bosch Appliances MMD 540H Meter Functions Diode Check, Diode To + Reverse Probes + to

MMD 540H Hybrid Multimeter Meter Functions 15

Meter Functions – Diode Check (		)
IMPORTANT: Turn the power OFF to
the test circuit
Ñ Select the Diode Check “	”
function with the rotary switch and
mode button.
Insert:
Ñ Black lead in COM terminal.
Ñ Red lead in V-Ω-RPMterminal.
Touch the Black test probe to the
negative (-) side of the diode.
Touch the Red test probe to the
positive (+) side of the diode. Reverse
the probes: Black to the positive (+)
side and Red to the negative (-) side.
NOTE: A “good” diode will read low
in one `direction and high in the
other direction when the probes are
reversed (or vice versa).		Black–	Red+
A defective diode will have the same
reading in both directions or read
between 1.0 to 3.0 V. in both directions.

Diode

- to +

Reverse Probes

+ to -

Good	.4 to .9V	OL
	OL	.4 to .9V
	OL	1.0 to 3.0V
	1.0 to 3.0V	OL
Bad	.4 to .9V	.4 to .9V
	OL	OL
	.000V	.000V

MMD 540H Instruction Manual Version 1 February 2008 Robert Bosch LLC