Dc Current Measurement; A) Less Than 200Ma Dc Current; B) 200Ma Or More Dc Current - Circuit-test DMR-2400 User Manual

➔ If the reading displayed does not have a sufficient number of digits, i.e.
115 instead of 115.4, set the function switch to the lower range.
➔ If ʻIʼ appears on the display, it indicates over-range. Immediately remove
test leads from the measuring circuit to avoid any damage to the meter.
The input voltage should not exceed the measurement capability of this
meter.

3. DC CURRENT MEASUREMENT

WARNING
: WHEN MEASURING CURRENT REMOVE ALL POWER FROM THE CIRCUIT
BEING TESTED. NEVER APPLY THE TEST LEAD TO THE MEASURING CIRCUIT WHEN CHANG-
ING THE POSITION OF THE FUNCTION SWITCH. IF YOU ARE UNSURE OF THE CURRENT
BEING MEASURED, SELECT THE HIGHEST RANGE AND REDUCE UNTIL A SATISFACTORY
READING IS OBTAINED.
a) Less than 200mA DC Current Measurement
➔ Set the function switch to 200m on the DC AMPS scale.
➔ Plug the red test lead in
jack.
➔ Remove power from the circuit that is to be measured. Open up the
circuit and connect the black lead to the negative side and the red lead
to the positive side of the circuit so that the test leads are in series with
the load to be measured.
➔ Apply power to the circuit.
➔ Read the displayed current.
➔ If the numeric value in the display is too small, change the function
switch to next lower range. Repeat until you have maximum digits pos-
sible without displaying ʻIʼ.
➔ If ʻIʼ appears on the display, it indicates over-range. Immediately remove
test leads from the measuring circuit to avoid any damage to the meter.
b) 200mA or more DC Current Measurement
CAUTION! Do not exceed 10 seconds when measuring the 10A range and
wait for 30 minutes between each measurement.
➔ Set the function switch to 10A on the DC AMPS scale.
➔ Plug the red test lead in 10A jack and the black test lead in
jack and the black test lead in
V/ /mA/
– 7 –
jack.