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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
Range
Resolution
20mA
10nA
+(1.2% of rdg+3dgt)
200mA
100nA
+(1.2% of rdg+3dgt)
2mA
1mA
+(1.2% of rdg+3dgt)
20mA
10mA
+(1.2% of rdg+3dgt)
200mA
100mA
+(1.5% of rdg+3dgt)
10A
10mA
+(2.0% of rdg+5dgt)
Maximum Measuring Voltage Drop: Less than 300mV.
Frequency
Range
Resolution
2kHz
1Hz
+(0.25% of rdg+2dgt)
20kHz
10Hz
+(0.25% of rdg+2dgt)
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
Range
Resolution
2nF
1pF
+(3.0% of rdg+3dgt)
20nF
10pF
+(3.0% of rdg+3dgt)
200nF
100pF
+(3.0% of rdg+3dgt)
2mF
1nF
+(3.0% of rdg+3dgt)
20mF
10nF
+(3.0% of rdg+3dgt)
200mF
100nF
+(3.0% of rdg+3dgt)
TR h
FE
Range
Test Condition
NPN
10mA DC
PNP
10mA DC
Continuity Test
Range
Threshold
Continuity Beeper
30W
DIODE TEST
Measures forward resistance of a semiconductor junction in kW at max. test current of
1.5mA.
Accuracy
Input Protection
Protected by
0.5A/250V
Fuse
10A / 250V Fuse
Accuracy
Input Level
Maximum Input
Level: 500V rms
Accuracy
Test Voltage & Frequency
Test Frequency 400Hz +3.0%
Test Voltage 120mV
Test Voltage
@3.0V DC
@3.0V DC
Response Time
2.5kHz
< 100ms
-7-
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