Uniks M32 User manual

M32 User Manual (V1.0)
TRMS Digital Multimeter

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Sommario
1. GENERAL INFORMATION ..................................................1
1.1 SAFETY INFORMATION ......................................................... 1
1.1.1 Safety instructions.................................................. 1
1.1.2 Safety considerations ............................................. 1
1.1.3 Safety symbol: ........................................................ 3
1.1.4 Maintenance practices for safety........................... 3
1.2 INPUT PROTECTION MEASURES .............................................. 4
2. A SCHEMATIC DIAGRAM FOR THE METER .........................4
2.1 A SCHEMATIC DIAGRAM FOR THE METER................................ 5
PHYSICAL APPEARANCE........................................................5
2.2 DESCRIPTION OF THE SYMBOLS ON THE DISPLAY UNIT................. 6
2.3 DESCRIPTION OF FUNCTIONAL KEYS........................................ 7
2.4 DESCRIPTION OF INPUT SOCKET ............................................. 8
2.5 ACCESSORIES..................................................................... 9
3. OPERATIONAL GUIDELINES ...............................................9
3.1 NORMAL OPERATION .......................................................... 9
3.1.1 Hold mode.............................................................. 9
3.1.2 Backlight & lighting................................................ 9
3.1.3 Auto power off ..................................................... 10
3.2 MEASUREMENT GUIDELINES ............................................... 10

3.2.1 Measurement of AC voltage and DC voltage ....... 10
3.2.2 Electric resistance measurement ......................... 11
3.2.3 Diode test ............................................................. 12
3.2.4 Beep continuity test ............................................. 13
3.2.5 Capacitance measurement .................................. 13
3.2.6 Frequency measurement...................................... 14
3.2.7 Current measurement .......................................... 14
3.2.8 NCV test (non-contact voltage detection) ............ 15
3.2.9 Measuring temperature....................................... 16
4. TECHNICAL PARAMETERS................................................16
4.1 OVERALL PARAMETERS ...................................................... 16
4.2 PRECISION INDICATOR........................................................ 18
4.2.1 DC voltage............................................................ 18
4.2.2 AC voltage ............................................................ 18
4.2.3 Frequency............................................................. 19
4.2.4 Electric resistance................................................. 19
4.2.5 Diode.................................................................... 20
4.2.6 Beeper continuity ................................................. 20
4.2.7 Capacitor.............................................................. 21
4.2.8 DC current ............................................................ 21
4.2.9 AC current ............................................................ 22
4.2.10 Temperature....................................................... 22

5. METER MAINTENANCE ...................................................23
5.1 GENERAL MAINTENANCE.................................................... 23
5.2 BATTERY & FUSE REPLACEMENT .......................................... 23
6. ASSISTANCE ....................................................................24
6.1 WARRANTY CONDITIONS............................................. 24
6.2 ASSISTANCE ................................................................. 25

M32 TRMS Digital Multimeter
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1. General Information
This digital multimeter is designed and manufactured in
compliance with IEC-61010 safety requirements on electronic
measuring instruments and hand-held digital multi-meters. It is
compliant with IEC-61010 requirements pertaining to 600V CAT IV,
1000V CAT.Ⅲ and requirements on pollution degree 2. Please read
carefully this Operation Manual and pay attention to safety
guidelines before operating this meter.
1.1 Safety information
1.1.1 Safety instructions
* Before operating this meter, the operator must observe all standard
safety procedures in the two respects below:
A. Safety procedures against electric shock
B. Safety procedures against unintended use
* To ensure your personal safety, please use the test lead that
accompanies the meter. Before operating this meter, ensure that the
test lead is flawless.
1.1.2 Safety considerations
* When the meter is used in the vicinity of the equipment that produces
strong electromagnetic interferences, the reading on the meter will
grow unstable and even produce serious errors.
*Don't operate the meter or pen-shaped meter whose appearance is
damaged.
*The safety function of the meter will become null if the meter is not
properly operated.
*The meter must be operated with great care when working in the
vicinity of an exposed conductor or bus line.
*The meter is prohibited from being used in the vicinity of any
explosive gas, vapor or dust.
*The measurement must be made with correct input terminals and

M32 TRMS Digital Multimeter
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functions and within the allowable measuring range.
*To prevent the meter from being damaged, the value to be input shall
not exceed the extremes allowed by each measuring range.
* When the meter has already been connected to the line being
measured, the operator is prohibited from touching the input
terminal that is not in service.
*When the voltage measured exceeds 60Vdc or 30Vac (valid value), the
operator shall be careful enough to avoid electric shock.
* When making measurement with a test lead, place your fingers
behind its protective ring.
*When switching to another measuring range, be sure that test lead
has already been taken off the measured circuit.
*For all DC functions, to prevent potential electric shock as a result of
incorrect reading, please first use AC functions to check the absence
of any AV voltage. Then, select DC voltage measuring range
equivalent to or greater than that for AC voltage.
*Before the tests on electric resistance, diode, capacitor or continuity,
the operator must cut off the power supply to the circuit to be
measured, and discharge all high-voltage capacitors within the
circuit to be measured.
* The electric resistance measurement or continuity test cannot be
carried out in any live electrical circuit.
* Before the current measurement, the operator must first examine the
protective tube of the meter. Before connecting the meter to the
circuit to be measured, the operator must first power off the
aforesaid circuit.
* Before repairing TV sets or measuring power switching circuit, the
operator must be careful enough to prevent high amplitude voltage
impulse from damaging the meter.
*This meter uses 4 x 1.5V AA batteries that must be correctly installed
into the battery compartment.
*When appears, the batteries must be replaced immediately. The
low level of a battery will result in incorrect reading on the meter,
which is likely to bring electric shock or personal injury to the
operator.
*In measurement, category III voltage and category IV voltage shall
not exceed 1000V and 600V respectively.

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*The meter shall not be in service if its case (or part of its case) is dismantled.
1.1.3 Safety symbol:
The safety symbols that appear on the meter's body and in this
Operation Manual:
Warning, an important safety symbol. The operator
must consult this Operation Manual before using the
meter. Unintended use may lead to the damage to
the device or its components.
AC (alternating current)
DC (direct current)
AC/DC
Ground
Double insulation protection
Fuse
Compliant with European Union Directive
High voltage warning
CAT. III
1000 V
over-voltage protection
CAT. IV
600 V
over-voltage protection
1.1.4 Maintenance practices for safety
* The operator must first pull out the test lead when the meter's case is
opened or the battery cover is dismantled.
* The designated replacement parts must be used at the moment of
maintenance.

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* The operator must cut off all relevant power supplies before opening
the meter. At the same time, the operator must avoid damage to the
meter's elements by ensure that he himself doesn't carry any static.
* The meter can only be calibrated, repaired and maintained by
professionals.
* When the meter's case is opened, the operator must understand the
fact that the presence of some capacitance may promise the
dangerous voltages even if the power supply to the meter is cut off.
* The operator should stop using and maintain the meter immediately
if any abnormality has been observed on the meter. The operator
must see to it that the meter cannot be in service unless it is proved
conforming.
* When the meter is left idle for a long period, the operator shall
remove the battery and place it in a place free from high temperature
and humidity.
1.2 Input protection measures
* The meter can sustain the maximum input voltage of 1000V (DC) or
750V (AC) at the moment of voltage measurement.
* The meter can sustain the maximum AC voltage of 600V or equivalent
voltage (valid value) when the tests on frequency, electric resistance,
continuity and diode are carried out.
* The protective tube (FF600mA/1000V) is used for protection purpose
when A and mA current measurements are carried out.
2. A Schematic Diagram for the Meter
This meter is a hand-held digital multi-meter with the function of
displaying True RMS. it is a large-screen LCD unit with backlight and
illumination light functions so that the user can easily recognize
reading. It is equipped with the function of overload protection and
the indicator of battery under voltage. Either for professionals,
factories, schools, enthusiasts or households, it is an ideal multi-