5-3. How to Make a Measurement
(1) DC/AC Voltage Measurement
1. Set the desired voltage type (DC or AC) by pushing the switch marked DC/AC.
2. Plug the red test lead into the “V.
W
.Hz” input jack and the black one into
the “COM” input jack.
3. Set the function/rotary switch to the desired “V” position. If the magnitude
of the voltage is not known, set the function/rotary switch to the highest
range and reduce until a satisfactory reading is obtained.
4. Connect the test leads to the device or circuit being measured.
5. Turn on the power to the device or circuit being measured. Voltage value
will appear on the digital display along with voltage polarity.
6. Turn off the power to the device or circuit being tested and disconnect the
test leads.
NOTE: When the switch is set to AC Voltage ranges, some residual voltage value might
be displayed on the LCD readout, but it doesn’t influence the actual measurement result.
(2) DC/AC Current Measurement
1. Set the desired voltage type (DC or AC) by pushing the switch marked DC/AC.
2. Plug the red test lead into the “mA” input jack for current measurement up
to 200mA, and the black one into the “COM” input jack.
3. Set the function/rotary switch to the desired “A” position. If the magnitude
of the current is not known, set the function/rotary switch to the highest
range and reduce until a satisfactory reading is obtained.
4. Open the circuit to be measured, and connect the test leads in series with
the load in which current is to be measured.
5. Read current value on the digital display.
6. Turn off all power to the circuit being tested and disconnect the test leads.
7. To measure in the 10A range, use the “10A” jack as the input jack.
NOTE: BE SURE TO MEASURE WITHIN 30 SECONDS TO AVOID HIGH
CURRENT HAZARD.
(3) Resistance Measurement
1. Plug the red test lead into the “V.
W
.Hz” input jack and the black one into
the “COM” input jack.
2. Set the function/rotary switch to the desired “
W
” position.
3. If the resistance being measured is connected to a circuit, turn off the
power to the circuit being tested and discharge all of the capacitors.
4. Connect the test leads to the circuit being measured.
When measuring high resistance, be sure not to contact adjacent points,
even if insulated, because some insulators have a relatively low insulation
resistance, causing the measured resistance to be lower than the actual
resistance.
5. Read resistance value on the digital display.
NOTE: Test lead resistance can interfere when measuring low resistance readings and
should be subtracted from the resistance measurement for accuracy.
Select 200
W
resistance range and make a firm contact between the two test lead points (short them
together). The display value is the test lead resistance to be subtracted.
-10-
AC Current
20
m
A
10nA
+(1.2% of rdg+3dgt)
200
m
A
100nA
+(1.2% of rdg+3dgt)
Protected by
2mA
1
m
A
+(1.2% of rdg+3dgt)
0.5A/250V
20mA
10
m
A
+(1.2% of rdg+3dgt)
Fuse
200mA
100
m
A
+(1.5% of rdg+3dgt)
10A
10mA
+(2.0% of rdg+5dgt)
10A / 250V Fuse
Maximum Measuring Voltage Drop: Less than 300mV.
Frequency
2kHz
1Hz
+(0.25% of rdg+2dgt)
Maximum Input
20kHz
10Hz
+(0.25% of rdg+2dgt)
Level: 500V rms
200kHz
100Hz
+(0.25% of rdg+2dgt)
2MHz
1kHz
+(0.25% of rdg+2dgt)
15MHz
10kHz
+(0.25% of rdg+2dgt)
Input Sensitivity:
2kHz to 2MHz - 200mV rms (TTL only)
15MHz - 500mV rms (TTL only)
Min. Pulse Width: <25ns
Capacitance
2nF
1pF
+(3.0% of rdg+3dgt)
Test Frequency 400Hz +3.0%
20nF
10pF
+(3.0% of rdg+3dgt)
Test Voltage 120mV
200nF
100pF
+(3.0% of rdg+3dgt)
2
m
F
1nF
+(3.0% of rdg+3dgt)
20
m
F
10nF
+(3.0% of rdg+3dgt)
200
m
F
100nF
+(3.0% of rdg+3dgt)
TR h
FE
NPN
10
m
A DC
@3.0V DC
PNP
10
m
A DC
@3.0V DC
Continuity Test
30
W
2.5kHz
< 100ms
DIODE TEST
Measures forward resistance of a semiconductor junction in k
W
at max. test current of
1.5mA.
-7-
Range
Resolution
Accuracy
Input Protection
Range
Resolution
Accuracy
Input Level
Range
Resolution
Accuracy
Test Voltage & Frequency
Range
Test Condition
Test Voltage
Range
Threshold
Continuity Beeper
Response Time
