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switch to the highest range and work down.
b) When only the figure “1” is displayed, over range is being indicated
and the function range switch has be set to a higher range.
c) Excessive current will below the fuse that must be replaced when
the input is from “mA” terminal. Fuse type is 0.5A.
d) A fuse does not protect the 20A range; maximum 10A continuous
or maximum 20A measuring time must be less than 15 seconds.
5.3 RESISTANCE MEASUREMENT
1) Connect black test lead to “COM” terminal and red test lead to the “V
Ω
”
input terminal.
2) Set the function range switch to the OHM range.
3) Connect the test leads across the resistance under measurement and
read the display value.
Note:
a) The polarity of the red test lead is “+”.
b) When the input is not connected, i.e. at open circuit the figure “1”
will be displayed for the over range condition.
c) If the resistance value being measured exceeds the maximum
value of the range selected an over range indication “1” will be
displayed and function range switch must be set to a higher range.
5.4 TEMPERATURE MEASUREMENT
1) Set the function range switch at the “°C” position.
2) Be sure the polarity of the thermocouple, put the cold end (free end) of
the thermocouple sensor into the temperature testing holes.
3) The working end (testing end) on or inside the object being tested.
4) The value of the temperature is shown on the display in degrees
centigrade (°C).
Note:
a) The testing temperature is displayed automatically when the
thermocouple is put into the testing holes.
b) The surrounding temperature is shown when the circuit of the
sensor is cut off.
c) The limit temperature measured by the thermocouple given
together with the instrument is 250°C, 300°C is acceptable within
short period.
5.5 DIODE & CONTINUITY TEST
1) Set the function range switch at the “
” position.
2) Connect the black test lead to “COM” terminal and red test lead to “V
Ω
”
input terminal; (Note: the polarity of the red test lead is “+”).
3) This range with “AUDIBLE CONTINUITY TEST” function. Built-in buzzer
sounds if the resistance between two probes is less than 30±20
Ω
.
4) Connect the test leads across the diode and read the display value.
Note:
a) When the input is not connected, i.e. at open circuit, the figure “1”
will be displayed.
b) Test condition: Forward DC current approx.1mA. Reversed DC
voltage approx. 2.8V.
c) The meter displays the forward voltage drop and displays figure
“1” for overload when the diode is reversed.
5.6 TRANSISTOR hFE TEST
1) Set the function range switch to the “hFE” position.
2) Make sure the transistor is “NPN” or “PNP” type.
3) Transistor correct insert to E.B.C connector.
4) Display reading is approx. transistor hFE value.
Note:
Test condition: Base current approx. 10uA. V
CE
approx.2.8V
5.7 MEASURING DWELL ANGLE
1) Connect the black test lead to the “COM” jack and the red test lead to
the “V
Ω
” jack.
2) Set the rotary switch to the desired “DWELL” range, according to the
cylinders of the motor to be measured.
3) Connect the black test lead to the iron bars or the negative pole of the
battery, and the red test lead to the distributor terminal of the ignition coil.
4) Start the motor to set it in idle-speed. Read the value of the dwell angle
on the LCD.
5.8 TESTING DUTY CYCLE
1) Connect the black test lead to “COM” jack, red test lead to “V
Ω
” jack.
2) Set the rotary switch in “DUTY” position.
3) Connect the test leads to the circuit to be measured.
4) Read the reading on the display.
5.9 MEASURING TACHO
1) Connect the black test lead to the “COM” jack and the red test lead to
the “V
Ω
” jack.
2) Set the rotary switch to the desired “TACH x 10” range, according to the
cylinders of the motor to be measured.
3) Connect the black test lead to the iron bars of the negative pole of the
battery, and the red test lead to the distributor terminal of the ignition coil.
4) Start the motor, read the reading on the display, divide this reading by the
number of cylinder, the result is the turning speed(tacho).
6. BATTERY
AND
FUSE
REPLACEMENT
1) Battery and fuse replacement should only done after the test leads have
been disconnected and power is off.
2) Loosen screws with suitable screwdriver and remove case bottom.
3) The meter is power by a single 9V battery (IEC 6F22, NEDA 1604, JIS
006P). Snap the battery connector leads to the terminals of a new battery
and reinsert the battery into the case top.
4) The meter is protected fast fuse 0.5A/250V, dimensions is
Φ
5*20mm.
5)
Replace the case bottom and reinstall the three screws. Never operate
the meter unless the case bottom is fully closed.
