7
8
6
5
3.
When the reading is lower than 400 counts, set the range
switch to the next lower range position. For maximum
accuracy, select the lowest range possible without over
ranging the meter.
2.1
Current Measurements
1.
Set the Function / Range switch to the highest 1000A AC
range.
2.
Press the trigger to open transformer jaws, clamp onto one
conductor only and release trigger. Jaws should be completely
closed. Read the current directly on the display. It is
recommended that the conductor be placed at th e center of
the closed jaws for maximum accuracy (Fig. - 1).
Fig. 1
7
3
2. OPERATION
Before taking any measurements, read the safety information section.
Always examine the instrument for damage, contamination (excessive
dirt, grease, etc.) and defects. Examine the test leads for cracked or
frayed insulation. If any abnormal conditions exist do not attempt to make
any measurements.
SELECT BUTTON
In ACV Range it will select ACV / Hz/Duty function. In
V/
/
range it
will select resistance or diode or countinuity function. In Hz it will select
Hz/Duty function.
DATA HOLD BUTTON
Press Data Hold button to toggle in and out of Data Hold mode, In the
Data Hold mode, the “ H ” annunciator is displayed.
2.2 Voltage Measurements
1.
Connect the red test lead to the “V
V
” jack and the black test lead
to the “COM” jack.
2.
Set the Function/Range switch to the desired Voltage type
(AC or DC)
3.
Connect the test leads to the device or circuit being measured.
4.
For DC, a (-) sign is displayed for negative polarity; positive
polarity is implied.
2.3 Resistance Measurements
1.
Connect red test lead to the “V
V
” jack and black test lead
to the “COM” jack.
2.
Set function / Range switch to
V/
/
position.
3.
If the resistance being measured is connected to a circuit,
turn off power to the circuit being tested and discharge all
capacitors.
4.
Connect test leads across the resistance 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 digital display. If a high resistance
vaiue is shunted by a large value of capacitance allow display to
stabilize.
2.4 Diode Test
1.
Connect the red test lead to the “V
V
” jack and black test lead
to the “ COM ” jack.
2.
Set the Function / Range switch to the
V/
/
position, select
“
” by pressing select key.
3.
Turn off power to the circuit under test.
4.
Touch probes to the diode. A forward-voltage drop is about
0.6V (typical for a silicon diode).
5.
If the digital display reads overrange “ OL ”, reverse the lead
connections. The placement of the test leads when the forward
reading is displayed indicates the orientation of the diode. The
red lead is positive and the black lead is negative. If overrange
“ OL ” is displayed with both lead connections, the junction is
open. If a low reading (less than 1000) is obtained with both
lead connections, the junction is shorted internally or (if
junction is measured in a circuit) the junction is shunted by a
resistance less than 1K
V.
In the letter case the junction must
be disconnected from the circuit in order to verify its operartion.
2.5 Continuity Measurement
In continuity test, the beeper sounds continuously, if the
resistance is less than 40
V.
2.6 Frequency & Duty Cycle Measurement
There are 2 positions for Frequency & Duty cycle measurements.
a) “Hz” position (Not for line frequency measurement.)
b) “ACV” position ( for line frequency measurement.)
2.6a “Hz” position (Not for line frequency measurement.)
Sensitivity
: 3V
Frequency Range
: 10Hz to 500kHz
Duty Cycle
: 1% to 90%
Overvoltage Protection : 200V DC or AC peak
1. Connect test lead to “Hz” and “COM” terminal.
2. Set rotary switch to “Hz” posotion.
3. Select Frequency or Duty cycle by pressing “Select” key.
4. Connect the test leads across the source or load under
measurement.
2.6b “ACV” position (For line frequency measurement.)
Sensitivity
: 2V
Frequency Range
: 40Hz to 500Hz
Duty Cycle
: 10% to 90%
Overvoltage Protection : 1000V DC or 750V AC peak
1. Connect test lead to “V
V
” and “COM” terminal.
2. Set rotary switch to “ACV” posotion.
3. Select Frequency or Duty cycle by pressing “Select” key.
4. Connect the test leads across the source or load under
measurement.
2.7 Capacitance measurement
1. Set function/Range Switch to “
” position
2. Short the leads of the capacitor to be tested togather to ensure
that there is no charge on the capacitor.
3. Insert the capcitor leads into the capacitor test socket.
4. Read the capacitance value in the display.
3. MAINTENANCE
WARNING
Remove test leads before changing battery or servicing.
Battery Replacement
Power is supplied by two 1.5V ‘AAA’ size battery or Equivalent.
The “ ” appears on the LCD display when replacement is needed.
To replace the battery, remove the screw from the battery cover and lift
off the battery case. Remove the batterys & repleced with new batterys.
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