DISABLING AUTO POWER OFF
By default, the DMM will automatically power itself off following any period of
15 minutes of front-panel inactivity. The
icon at the upper left of the LCD
indicates that the Auto Power Off function is enabled.
To disable the APO
function
, press and hold the
FUNC
button while powering on the meter by
moving the rotary function switch to any position other than
OFF
. This will
cause the
icon to disappear.
MEASURING AC OR DC VOLTAGE
••
Warning
••
Do not measure any AC or DC voltage higher than 600V. Doing so may damage
the meter’s internal circuitry.
(1) Turn the rotary switch to the
position. By default, doing so will prepare the
DMM to measure DC rather than AC voltage, indicated by the presence of
the
icon at the lower left of the LCD. If you are certain that the voltage
you want to measure is DC voltage, proceed to Step (2).
If you know that the voltage you want to measure is AC voltage, press the
FUNC
button once; this will cause the
icon to replace the
icon on the
left side of the LCD. If you are unsure whether the voltage to be tested is AC
or DC, configure the DMM to measure AC voltage for safety reasons.
(2) Plug the black test lead into the front-panel
COM
jack and the red test lead
into the
jack.
(3) Touch the black test lead to the lower-potential point of the circuit under
test, and the red test lead to the higher-potential point.
(4) Read the measured voltage on the display. If you are working in Manual
Ranging mode and the readout is
.OL
, the voltage level is beyond the
currently selected range. If that is the case, use the
FUNC
button to select
the next-widest position. When measuring DC voltage, if the test leads are
reversed a minus sign will appear at the left of the readout.
MEASURING AC or DC CURRENT
••
Warning
••
Do not attempt to measure: 1) currents larger than 400mA through the
jack; 2) currents larger than 10A through the
A
jack; or 3) currents larger than
2A through the
A
jack for more than 2 minutes continuously; pause 10 minutes
after each measurement of such a large current.
DC
AC
DC
TEMP
mAµAV
Ω
TEMP
mAµAV
Ω
9
