– 11 –
b) 200mA or more AC Current Measurement
CAUTION!
Do not exceed 15 seconds when measuring the 20A range and
wait for 30 minutes between each measurement.
➔
Set the function switch to 20 on the
AC AMPS
scale.
➔
The LED above 20A jack will turn on.
➔
Plug the red test lead in 20A jack and black test
lead in the
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 ʻIʼ appears on the display, it indicates
over-range. Immediately remove test
leads from the measuring circuit to avoid any damage to the meter.
5. RESISTANCE MEASUREMENT
WARNING:
NEVER CONNECT THE TEST LEAD TO ANY
VOLTAGE WHEN THE FUNCTION SWITCH IS SET TO . REMOVE
ALL POWER FROM THE CIRCUIT BEING TESTED WHEN CHECK-
ING RESISTANCE. DISCHARGE ANY CHARGED CAPACITORS.
NEVER APPLY THE TEST LEAD TO THE MEASURING CIRCUIT
WHEN CHANGING THE POSITION OF THE FUNC-
TION SWITCH. IF YOU ARE UNSURE OF THE
RESISTANCE BEING MEASURED, SELECT THE
HIGHEST RANGE AND REDUCE UNTIL A SATIS-
FACTORY READING IS OBTAINED.
➔
Set the function switch to the
desired
OHMS
scale.
➔
The LED next to V/ /F/ / jack
will turn on.
➔
Plug the red test lead in V/ /F/ /
jack and black test lead in
jack.
CAP
CIRCUIT-TEST
DMR-4200
20A
TEMP
mA
HOLD
POWER
CAT II 1000V
V/Ω/F/ /
COM
D
C
V
O
LT
S
OHMS
Ω
C
A
PA
C
IT
A
N
CE
AC
V
O
LT
S
AC AMPS
D
C A
M
PS
TEMP F
REQ
CAP
CIRCUIT-TEST
DMR-4200
20A
TEMP
mA
HOLD
POWER
CAT II 1000V
V/Ω/F/ /
COM
D
C
V
O
LT
S
OHMS
Ω
C
A
PA
C
IT
A
N
CE
AC
V
O
LT
S
AC AMPS
D
C A
M
PS
TEMP F
REQ
RESISTOR
