RAGU 81D Manuel utilisateur
RAGU 81D DIGITAL MULTIMETER
OPERATION MANUAL
Contents
I. General...................................................- 1 -
Ⅱ. Open-package Inspection....................- 2 -
III. Safety Considerations......................... - 3 -
IV.Instrument Panel & Button Function
Description................................................- 9 -
V. Other Functions.................................. - 12 -
VI、Property...........................................- 13 -
1．General Property ......................- 13 -
2．Technical Property....................- 14 -
2-2-1. DCV.............................- 15 -
2-2-2. ACV True RMS........... - 16 -
2-2-3. DCA.............................- 18 -
2-2-4. ACA True RMS........... - 20 -
2-2-5. Resistance (Ω)............. - 23 -
2-2-6.Diode and Continuity Test- 25 -
2-2-7. Capacity (C).................- 28 -
2-2-8. Frequency (F).............. - 29 -
2-2-9. Temperature (℃/℉).... - 31 -
VII. Instrument Maintenance.................. - 33 -
VIII. Fault Elimination............................- 36 -
I. General
The RAGU 81D digital multimeter,
equipped with the LCD display of text height
18.9mm, is a 3 3/4 digital multimeter which
has merits of clear reading, stable
performance and high reliability.
It could be used to measure DC voltage,
AC voltage, DC current, AC current,
resistance, temperature, capacity, frequency /
duty cycle, diode and to make on-and-off test.
Meanwhile, it is available for unit symbol
display, automatic/manual range switching,
automatic power off and alarm function. The
complete machine takes an integrated circuit
which can directly drive LCD 8-bit
microprocessor and double-integrating A/D
- 2 -
switching and a digital display drive offering
high resolution and high precision. Due to its
complete functions, high measurement
accuracy and convenient operation, the
multimeter is the ideal tool in laboratory and
factory as well as for radio fans and family.
Ⅱ. Open-package Inspection
Open the package box and take out the meter,
check carefully if the following accessories
are absent or damaged. If there were any
absence or damage, please contact the
distributor immediately.
Digital Multimeter 1 PC
Instruction Manual 1 copy
Test Leads 1 pair
Temperature Probe (K-Thermocouple) 1 PC
- 3 -
AAA (1.5v) 7# batteries 2 PCs
III. Safety Considerations
The design of meter is in accordance
with IEC1010 clause (the safety standard
issued by International Electrotechnical
Commission). Prior to the operation of the
instrument, please read the safety
considerations first.
1. When DC voltage is higher than 30V, AC
voltage is higher than 25V, current is
higher than 10mA, AC power line with
inductive load or power line during electric
fluctuation is measured. Please beware of
electric shock.
2. Prior to measurement, check if the
measurement function switch is at the
- 4 -
correct position. Check if the test lead is
contacted reliably, connected correctly, and
grounded well and etc. in order to avoid
electric shock.
3. Only if the meter is used with the matched
test lead, can it meet the requirements of
safety standard. When the line of the test
lead is damaged, it is necessary to replace
another one of the same model or the same
electrical specification.
4. Don’t use other unconfirmed or
disapproved fuse to replace the original
one inside the meter. Only the fuse of the
same model or same specification can be
replaced. Before the replacement, the test
lead must leave the measuring point and
ensure there is no any signal at the input
- 5 -
terminal.
5. Don’t use other unconfirmed or
disapproved batteries to replace the
batteries inside the meter. Only the
batteries of the same model or same
electrical specification can be replaced.
Before the replacement, the test lead must
leave the measuring point and ensure there
is no any signal at the input terminal.
6. When the electrical measurement is made,
never let your body get in touch with the
ground directly, and don’t touch uncovered
metal terminal, output port, lead clamp etc.
Dry clothes, rubber shoes, rubber cushion
and other insulating material are usually
used to keep your body insulated against
the ground.
- 6 -
7. Don’t store and use it in the
high-temperature, high-humidity,
inflammable environment and strong
magnetic field.
8. It may cause damage to the meter and
endanger the operator’s safety if you take
any voltage measurement that exceeds
the limits. The ultimate voltage value
permitted for measurement is marked on
the instrument panel. Never take
measurement or input the ultimate value
which exceeds the standard in order to
avoid electric shock and damage to the
meter.
9. When the test lead is inserted into the
current socket, don’t take any voltage
- 7 -
measurement to prevent damaging the
meter and endangering the operator’s
safety.
10. Don’t try calibrating or repairing the
meter. When necessary, only the qualified
professional personnel who have had
special training or gained approval can
make it.
11. During measurement, the requirement of
measurement function must be in
accordance with LCD display. Please be
sure to disconnect the line of the test leads
with the measured object first and ensure
there is no any input signal. It is forbidden
to switch the function/range selection
- 8 -
switch during measurement.
12. When “ ”is shown on LCD display,
please replace battery immediately to
ensure the measurement precision.
13. It is not allowed to insert the test lead into
the current terminal to measure voltage!
14. Please don’t change the circuits of the
meter by yourself to prevent damaging
the meter and endangering the
operator’s safety.
15. Description of Safety Symbols
Table des matières
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