4.3 Measurement Procedures
CAUTION
: Maximum Input Voltage is 600Vrms,do not exceed
this rating to avoid personal injuries or damage to the
instrument. The FUNCTION switch should be set to
the range you want to test before the operation.
CAUTION
: Always ensure that the correct terminals are used
for the type of measurement to be made. Avoid
making connections to “live” circuits whenever
possible.When making current measurements en-
sure that the circuit is not “live” before opening it in
order to connect the test leads.
•
The measurement will be shown in the LCD Display when the
probe are connected. For Continuity Test a continuous beeping
sound indicates that the measured resistance is < 100
.
4.3.4 Frequency measurement
•
Connect the black test lead to the “
COM
” socket and red test lead
to the “
+
” socket.
•
Set the
FUNCTION
switch to the “
V Hz
” function.
•
The instrument default to VDC measurement. To measure
frequency press the
SELECT
button momentarily twice, and the
Hz will appear on the display.
•
Connect the read probe into the “
+
” input and the black probe
into the “
COM
” input.
•
When the frequency function is selected, the trigger level defaults
to 1 Volt. If the readings are unstable or if there is not reading at
all, it maybe be necesary to change the trigger level. To change
the trigger level, press the “
RANGE
” button once to display the
selected level, and then press the “RANGE” button within 1
second. Every time the button is pressed the trigger level will
change to the next value (1V, 2V, 20V and 200V).
•
Connect the test leads across the source or circuit under
measurement. Readout will show on the LCD display.
4.3.5 Tach (RPM) Measurement
4.3.1 DC/AC Voltage measurement
•
Connect the black test lead to the “
COM
” socket and red test lead
to the “
+
” socket.
•
Set the
FUNCTION
switch to the “
V Hz
” function.
•
The instrument default to DC measurement. To measure AC
Voltages press the
SELECT
button momentarily.
•
Connect the read probe into the “
+
” input and the black probe
into the “
COM
” input.
•
Connect the test leads across the source or load under
measurement. Readout will show on the LCD display.
4.3.2 DC Current measurement
•
Connect the black test lead to the “
COM
” socket and red test lead
to the “
A mA
” input connector. .
•
Set the
FUNCTION
switch to the “
mA
A
” function.
•
Connect the test leads in series with the source or load under
measurement.
•
The instrument default to DC measurement. To measure AC
Current press the
SELECT
button momentarily.
•
Connect the test leads in series with the source or load under
measurement. Readout will show on the LCD display.
4.3.3 Resistance measurement and Continuity Test
CAUTION
: Maximum Input Voltage for this function is 600 Vrms
do not exceed this rating to avoid personal injuries or
damage to the instrument. Also ensure there is no
power applied to the component or circuit and all
capacitors are discharged.
•
Connect the black test lead to the “
COM
” socket and red test lead
to the “
+
” socket.
•
Set the
FUNCTION
switch to the “
” position. The instrument
will default to Resistance measurement, to select the Continuity
Test function press the “
SELECT
” button momentarily.
•
Connect the test leads across the componet or circuit under
measurement.
•
Connect the black lead plug of the inductive pick-up into the
“
COM
” socket and red lead plug to the “
+
” socket.
•
Set the
FUNCTION
switch to the
position.
•
Press the SELECT button to select through “
RPM
” for 4
strockes, “
RPM
” for 2 strockes and DIS, and “
RPM
M
”
for 2
strockes with waste spark ignition system engines.
•
Open the Inductive Pick-up clamp and insert a spark plug wire
inside, observing that the arrow on the Inductive Pick-up points
to the spark plug, and then close the clamp making sure that the
clamp jaws are completely close. The RPM will be shown in the
LCD Display when the engine is running.
4.3.6 Dwell Angle Measurement
•
Connect the black test lead to the “
COM
” socket and red test lead
to the “
+
” socket.
•
Set the
FUNCTION
switch to the “
%
” position, and press
the
SELECT
button once to select the
Dwell function.
•
The Number of cylinders defaults to 4 (
4-C
)
.
Press the “
Cylinder
/RANGE
”
switch
to display the cylinders setting, and immediately
press the button again to select the number of cylinders (1
through 12) of the engine under test.
Taking Tach
Readings
Measuring
resistance
and
continuity
M e a s u r i n g
Voltages
