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MMD 540H Instruction Manual | Version 1 | February 2008 Robert Bosch LLC
Meter Functions – Diode Check ( )
IMPORTANT: Turn the power OFF to
the test circuit
Select the Diode Check “
”
function with the rotary switch and
mode button.
Insert:
Black lead in COM terminal.
Red lead in V-Ω-RPM terminal.
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).
A defective diode will have the same
reading in both directions or read
between 1.0 to 3.0 V. in both directions.
Ñ
Ñ
Ñ
Diode - to +
Reverse Probes
+ to -
Good
.4 to .9V OL
OL .4 to .9V
Bad
OL 1.0 to 3.0V
1.0 to 3.0V OL
.4 to .9V .4 to .9V
OL OL
.000V .000V
MMD 540H Hybrid Multimeter | Meter Functions | 15