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4. HOW TO USE THE MULTIMETER
PRELIMINARY NOTE:
1. If the battery is weak. a “ ” sign will appear on display. The battery
should be replaced
2. The mark or sign“ ”next to the test lead jacks is for warning
that the input voltage or current should not exceed the indicated values.
This is to prevent damage to internal circuitry.
3. The FUNCTION switch should be set to the range to be used before
operation.
4.1 DC Voltage Measurement
1) set the FUNCTION switch to “V ” range.
2) Connect the black test lead to the “COM” jack and the red test lead to
the “VΩ” jack.
3) Connect the test leads across the source or load under
measurement.
Note:
1. If the voltage range is not known beforehand. set the FUNCTION
switch to the highest range and work down .
2. when “1” is display, overrange is being indicated and the FUNCTION
switch must be set to a higher range .
3. Don’t apply more than DC 1000V to the input, indication is possible
at higher voltage but there is danger of damaging the internal circuitry .
4. Use extreme caution to avoid contact with high tension circuits when
measuring high voltage
4.2 AC Voltage Measurement
1) Set the FUNCTION switch to “V~” range.
2) Connect the black test lead to the “COM” jack and the red test lead to
the “VΩ” jack.
3) Connect the test leads across the source or load under
measurement.
Note:
1. Don’t apply more than 700Vrms AC to the input ,indication is
possible at higher voltage but there is danger of damaging the internal
circuity .
2. Use extreme caution to avoid contact with high tension circuits when
measuring high voltage.
4.3 DC current Measurement
(1) Set the FUNCTION switch to “A ” range.
(2) Connect the black test lead to the “COM” jack and the red test lead
to the “mA” jack for a maximum of 200mA. For a maximum of
20A ,move the red test lead to “20A” jack .
(3) Connect the test leads in series with the load under measurement.
Note:
1. If the current range is not known beforehand, set the FUNCTION
switch to high range and work down.
2. when “1” is display, overrange is being indicated and the FUNCTION
switch must be set to a higher range.
3. The maximum input current is 200mA, 20A depending upon the jack
used .Excessive current will blow the fuse and must be replaced . The
fuse rating should be 200mA or 20A and no more to prevent damage to
the internal circuitry .
4.4 AC Current Measurement
(1) Set the FUNCTION switch to “A～” range.
(2) Connect the black test lead to the “COM” jack and the red test
lead to the “mA” jack for a maximum of 200mA. For a maximum of
20A ,move the red test lead to “20A”jack.
(3) Connect the test leads in series with the load under
measurement.
Note :
1. If the current range is not known beforehand, set the FUNCTION
switch to high range and work down.
2. when “1” is display, overrange is being indicated and the FUNCTION
switch must be set to a higher range.
3. The maximum input current is 200mA, 20A depending upon the jack
used .Excessive current will blow the fuse and must be replaced . The
fuse rating should be 200mA or 20A and no more to prevent damage to
the internal circuitry .
4.5 Resistance Measurement
(1) Set the FUNCTION switch to “Ω ” range.
(2) Connect the black test lead to the “COM” jack and the red test
lead to the “VΩ” jack .
(3) Connect the test leads across the resistance under
measurement.
Note:
1. If the resistance value being measured exceeds the maximum value
of the range selected ,an over-range indication will be displayed (“1”).
Select a higher range. For resistance of approximately 1 Mega-ohm
and above, the meter may take a few seconds to stabilize. This is
normal for high resistance readings.
2. When the input is not connected, i.e. at open circuit, the sign “1” will
be displayed for the overrange condition.
When checking in-circuit resistance, be sure the circuit under test has
all power removed and that all capacitors are fully discharged .
4.6 Capacitance Measurement
(1) Set the FUNCTION switch to “F” range.
(2) Insert the capacitor under measurement into the two jacks “C-”
and “C+” on the front panel.
Note :
1. Capacitors should be discharged before being inserted into the
test-jacks.
2. When testing large capacitance, note that there will be a certain time
lag before the final indication.
3. Do not connect an external voltage or charged capacitor (especially
larger capacitors) to measuring terminals.
4.7 Frequency Measurement
(1) Set the FUNCTION switch to “200KHz” range.
(2) Connect the black test lead to the “COM” jack and the red test lead
to the “VΩ” jack .
(3) Connect the test leads to the point under measurement .
4.8 Temperature Measurement
(1) Set the FUNCTION switch to “℃”
(2) Connect the black test lead of the sensor to “T-” jack , the RED test
to “T+” jack.
Put the sensor probe into the temperature field under measurement .
A. This meter enclosures WRNM-010 type contact thermocouple,
limit temperature is 250 ℃ (300 ℃ shortly ) ;
B. Please don't change the thermocouple at will , otherwise we can't
guarantee to measure accuracy ;
C. Do not import any voltage in the temperature function .
4.9 Diode Measurement and audible continuity test
(1) Set the FUNCTION switch to the “ ” range and connect the
test leads across the diode under measurement, display shows the
approximate forward voltage of this diode.
(2) Connect the black test lead to “COM” jack and the red test lead to
the “VΩ” jack..
(3) Connect the test leads to two points of circuit, if the resistance is
lower than approximately 80Ω ,the buzzer sounds.
4.10 Backlight
Press the light button (4) to illuminate the display, press once again to
turn it off.
5.MAINTENANCE
(1) The multimeter is a precision electronic device. Do not tamper
with the circuitry to avoid damage:
A : Never connect more than 1000V DC or 750Vrms AC.
B : Never connect a source of voltage under the condition of
resistance measurement .
C : Never operate the meter unless the battery cover is in place and
fully closed .
D : Battery and / or fuse replacement should be done after the test
leads have been disconnected and POWER IS OFF .
(2) turn off the power if the meter is not in use , removed the battery if
the meter is not being used for long period .
(3) If the sign “ ” appears on the display, open the compartment
cover, remove the battery and replace it with a battery of the same type.
For fuse replacement follow the same steps .
6. WARRANTY
The guarantee period for PIN-144 amounts to 2 years and commences on the date
of purchase. During the guarantee period ELTRA NV will repair any defects
attributable to material or production faults. ELTRA NV may choose to either repair
or replace a defective appliance.
ELTRA NV is not obliged to repair or replace appliances if they have become
defective as a result of damage, inappropriate use, or modifications or
adaptations made after the purchase date.
Take any defective appliance together with the original receipt back to the shop
where the appliance was sold. Always add a note with a description of the
problem.
… 6 …

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