multicomp pro MP730425 User manual

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Residential Multimeter
User Manual
Part Number: MP730425

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Preface
Thank you for purchasing the new MP730425 residential multimeter. In order to use this product safely and correctly, please
read this manual thoroughly, especially the Safety Instructions.
After reading this manual, it is recommended to keep the manual at an easily accessible place, preferably close to the device,
for future reference.
1. Overview
The MP730525 is a pocket-size residential multimeter specially designed for home use. The compact structure makes it easy
to hold in one hand, and the EBTN screen allows users to obtain clear readings at maximum angle. The multimeter complies
with EN61010-1:2010, EN61010-2-030:2010, and EN61326-1 :2013 safety standards and is able to safely operate within the
CAT Ill 600V environment.
2. Features
• The battery status detection is automatically completed at the moment of booting: The green light indicates the normal
state; the yellow light indicates low battery; the red light indicates very low battery, and there is acousto-optic indication at
this time.
• Automatic identication of ACV/DCV measurement
• Intelligent non-contact electric eld detection, which distinguishes the weak electric eld by green light, the strong electric
eld by yellow light, and the super strong electric eld by red light
• Full featured protection
Before using the meter, please read the Safety Instructions carefully.
3. Safety Instructions
• Do not use the meter if the rear cover is not covered up, or it will pose a shock hazard!
• Before use, please check and make sure the insulation layer of the meter and test leads is in good condition without any
damage or broken wires. If you nd the insulation layer of the meter housing is signicantly damaged, or if you think the
meter cannot function property, do not use the meter.
• When using the meter, your ngers must be placed behind the nger guard ring of the test leads.
• Do not apply voltage over 600V between any meter terminal and earth ground to prevent electric shock and damage to the meter.
• Be cautious when the measured voltage is higher than 60V (DC) or 30Vrms (AC) to avoid electric shock!
• The measured signal is not allowed to exceed the specied limit to prevent electric shock and damage to the meter!
• The range switch should be placed in the corresponding position during measurement.
• Never change the range setting when measuring to avoid damage to the meter!
• Do not change the internal circuit of the meter to avoid damage to the meter and user!
• When the “ ” symbol appears on the LCD, please replace the batteries in time to ensure measurement accuracy.
• Do not use or store the meter in high temperature and high humidity environments.
The performance of the meter may be affected.
• Clean the meter casing with a damp cloth and mild detergent. Do not use abrasives or solvents!
• Measure known voltage with the meter to verify that the meter is working properly. If the meter is working abnormally, stop
using it immediately. A protective device may be damaged.
• If the equipment is used in a manner not specied by the manufacturer, the protection provided by the equipment may be
impaired.
• If the test leads need to be replaced, you must use a new one which should meet EN 61010-031 standard, rated CAT Ill
600V, 10A or better.
• Safety symbol description

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Low battery
Earth(ground) TERMINAL
Caution
Comply with European Union standards
Equipment protected throughout by DOUBLE INSULATION or REINFORCED INSULATION
Conforms to UL STD. 61010-1, 61010-2-030, 61010-2-033,
Certied to CSA STD. C22.2 NO. 61010-1, 61010-2-030, 61010-2-033
CAT III It is applicable to test and measuring circuits connected to the distribution part of the building’s
low-Voltage MAINS installation.
4. Operating Instructions
• The meter has the function of battery self-checking, and can complete the battery status detection within 2 seconds at the
moment of booting:
a) When the supply voltage is >2.7V, the indicator on the top of the meter lights up green for 2 seconds, indicating that the
power is sufcient, and the meter enters the normal measurement mode accompanied by one beep.
b) When the supply voltage is within 2.4V ~ 2.7V, the indicator on the top of the meter lights up yellow, and the low battery
symbol “ ” appears on the LCD.
c) When the supply voltage is <2.4V, the indicator on the top of the meter lights up red for 2 seconds, and then the meter
powers off. It can only be used after replacing the batteries.
4.1 DC/AC Voltage Measurement (Picture 1)
1) Tum the range switch to the AC voltage position;
2) Insert the red test lead into the “V Ω °C” jack, black into the “COM” jack, and make the probes in contact with both ends
of the measured voltage (parallel connection to the load);
3) Read the test results on the display.
The meter has the function of ACV/DCV automatic identification (voltage ≥0.5V). If you want to measure voltage less than 0.5V,
press the Select Button to toggle the AC and DC voltage to lock the measurement mode: After pressing the SELECT button,
the meter no longer has the function of ACV/DCV automatic identification, unless you turn the range switch or restart the meter!
Note:
• Do not measure voltage above 600Vrms. Although it is possible to measure higher voltage, it may damage the meter and
hurt the user! If the LCD displays “OL”, it indicates that the voltage is over range. The input impedance of the meter is 10MΩ.
This load effect may cause measurement error when measuring high impedance circuits. If the measured impedance is
≤10kΩ, the error can be ignored (≤0.1%).
• Be cautious to avoid electric shock when measuring high voltage.
• Test known voltage before use to conrm if the meter functions properly!

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4.2 Resistance Measurement (Picture 1)
1) Tum the range switch to the resistance measurement position;
2) Insert the red test lead into the “V Ω °C” jack, black into the “COM” jack, and make the probes in contact with both ends of
the measured resistance (parallel connection to the resistance);
3) Read the test results on the display.
Note:
• Before measuring the online resistance, switch off the power supply of the circuit, and fully discharge all capacitors to
avoid damage to the meter and user.
• If the resistance is not less than 0.50 when the test leads are shorted, please check if the test leads are loose or abnormal.
• If the measured resistor is open or the resistance exceeds the maximum range, the “OL” symbol will appear on the display.
• Do not input voltage higher than DC 60V or AC 30V.
• Measured value = measured display value - short circuit value of the test leads
4.3 Continuity Measurement (Picture 1)
1) Turn the range switch to the continuity measurement position;
2) Insert the red test lead into the “V Ω °C” jack, black into the “COM” jack, and make the probes in contact with the two test
points;
3) Measured resistance ≤300: The indicator lights up green accompanied by continuous beeps, indicating that the on-resistance
is small, and the LCD displays the corresponding resistance value.
Measured resistance within 31Ω ~ 420Ω: The indicator lights up red accompanied by no beep, indicating that the on-resist-
ance is large, and the LCD displays the corresponding resistance value. Measured resistance >4200: The indicator and
buzzer have no response, indicating that the circuit is open. The LCD displays “OL”.
Note:
• Before measuring the continuity online, switch off the power supply of the circuit, and fully discharge all capacitors to avoid
damage to the meter and user.
4.4 Temperature Measurement (°C/°F Measurement, Picture 2)
1) Turn the range switch to the temperature measurement position;
2) Insert the plug of the K-type thermocouple into the meter, and x the temperature sensing probe on the object to be tested;
read the temperature value on the display after it is steady.
Note:
• “OL” symbol appears when the meter is turned on. Only K-type thermocouple/ temperature sensor is applicable (The
measured temperature should be less than 300°C/572°F). °F=°C*1.8+32

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4.5 Non-contact AC Electric Field Sensing (Picture 3)
1) To sense whether there is AC voltage or electromagnetic eld, please tum the range switch to the NCV position;
2) Bring the front end of the meter close to the measured object to start sensing. The intensity of the electric eld sensing is
indicated by the LED indicator and the segment “-” on the LCD. The more the segments (up to four segments) are displayed,
the higher the electric eld intensity and the faster the beep.
4.6 Others
• During measurement, if there is no operation of the range switch or any button for 15 minutes, the meter will automatically
shut down to save power. You can wake tt up by pressing any button or turning the range switch, and the buzzer should beep
once for indication. To disable auto shutdown, tum the range switch to the OFF position, press and hold the SELECT button
(≥2 seconds) while power up the meter.
• When you press any button or turn the range switch, the buzzer will beep once.
• Buzzer warning:
Input voltage ≥600V (AC/DC): The buzzer beeps continuously warning that the range is at its limit.
• About 1 minute before auto shutdown, the buzzer will make ve consecutive beeps; before shutdown, the buzzer will make
one long beep.
5. Specications
Function Range Resolution Accuracy Max. Measured
Value Bandwidth Overload Protection
Input
Impedance
DC Voltage
4.000V 0.001V
±(0.5%+2) ±600V - 600Vrms 10MΩ 40.00V 0.01V
400.0V 0.1V
600V 1V ±(0.7%+3)
AC Voltage
4.000V 0.001V
±(1%+3) 600V 40Hz ~ 400Hz 600Vrms 10MΩ
40.00V 0.01V
400.0V 0.1V
600V 1V

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Function Range Resolution Accuracy Max. Measured
Value Bandwidth Overload Protection
Input
Impedance
Resistance
400.0Ω 0.1Ω ±(1%+2)
21MΩ - 600Vrms -
4.000kΩ 0.001kΩ
±(0.8%+2)40.00kΩ 0.01kΩ
400.0kΩ 0.1kΩ
4.000MΩ 0.001MΩ ±(1.2%+3)
20.00MΩ 0.01MΩ ±(1.2%+3)
Centigrade -40°C ~ 40°C 1°C ±4°C 350°C
- 600Vrms -
40°C ~ 300°C 1°C ±(1%+5)
Fahrenheit -40°F ~ 104°F 1°F ±6°F 662°F
104°F ~ 572°F 1°F ± (2%+6)
When switching to the NCV function, the LCD displays “EF”
NCV
(non-contact
voltage detec-
tion)
Electric eld
sensing
When the front end of the meter is close to the power socket or power cord with about
200V mains supply, the meter indicator will distinguish the intensity of the electric eld
sensing by “green”, “yellow” and “red” light respectively (from weak to strong), and the
LCD will synchronously display “-”, “--”, “---” or “----” accompanied by beeps.
Neutral and
live wire
identication
When the front end of the meter is close to the mains socket at the same distance, the
live wire will have a stronger electric eld signal than the neutral wire. You can distinguish
them according to the number of the “-” displayed and the indication status of the light.
Continuity Resistance ≤30Ω, Continuous beeps; Resistance >31Ω, no beep
General Specications
SELECT button Switch the scale of the test function cyclically
(Only applicable to and °C °F)
HOLD button
Turn on/off the lock screen function cyclically, and the bottom left
corner of the LCD displays “ ”
(Only applicable to and °C °F)
Max display 4099
Overload display OL
Sampling frequency 3 times/second
Polarity display If negative polarity is input, the “-” symbol will be displayed;
No display for positive polarity
Low battery indication The bottom left corner of the LCD displays “ ”, and at the moment
of booting, the indicator on the top of the meter lights up yellow.
Operating Conditions
Operating temperature 0°C ~ 40°C (32°F ~ 104°F)
Storage temperature -10°C ~ 50°C (14°F ~ 122°F)
Relative humidity 0°C ~ below 30°C: ≤75%
30°C ~ 40°C: <50%
Altitude 0 ~ 2000m
Battery AAA battery 1.5Vx2

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Safety Standards
Design standards EN61010-1: 2010; EN61010-2-030:2010; EN 61326-1:2013
EN61010-2-033:2012, EN61326-2-2:2013
EMC RF eld (1V/m): Overall accuracy= specied accuracy± 5% of range
RF eld {>1V/m): No specied calculation
Measurement Standards CAT Ill 600V, double insulation and material pollution degree II
Dimensions 130mm × 65mm × 28mm
Weight About 130g (including batteries)
Standard Accessories
Test leads 1 Pair
User manual 1 Pc
Thermocouple 1 Pc
Note:
To ensure measurement accuracy, operating temperature should be within 18°C ~ 28°C and the uctuation range should be
within ±1°C. Temperature <18°C or >28°C: Add temperature coefcient error 0.1 × (specied accuracy)/°C.
6. Maintenance
Warning: Before opening the rear cover of the meter, switch off the power supply
(remove the test leads from the input terminals and the circuit).
6.1 General Maintenance
Clean the meter casing with a damp cloth and mild detergent. Do not use abrasives or solvents!
If there is any malfunction, stop using the meter and send it for maintenance.
The maintenance and service must be implemented by qualied professionals or designated departments.
6.2 Battery Replacement (Picture 4)
Replace the batteries immediately when the low battery symbol “ ” appears on the LCD, otherwise the measurement ac-
curacy might be affected. Battery specication: AAA battery 1.5Vx2
Battery replacement: Use a screwdriver to unscrew the screw on the battery cover (lop), and remove the cover to replace the
batteries. Pay attention to the positive and negative polarity when installing the new batteries.
Important Notice : This data sheet and its contents (the “Information”) belong to the members of the AVNET group of companies (the “Group”) or are licensed to it. No licence is granted for
the use of it other than for information purposes in connection with the products to which it relates. No licence of any intellectual property rights is granted. The Information is subject to change
without notice and replaces all data sheets previously supplied. The Information supplied is believed to be accurate but the Group assumes no responsibility for its accuracy or completeness,
any error in or omission from it or for any use made of it. Users of this data sheet should check for themselves the Information and the suitability of the products for their purpose and not make
any assumptions based on information included or omitted. Liability for loss or damage resulting from any reliance on the Information or use of it (including liability resulting from negligence or
where the Group was aware of the possibility of such loss or damage arising) is excluded. This will not operate to limit or restrict the Group’s liability for death or personal injury resulting from its
negligence. Multicomp Pro is the registered trademark of Premier Farnell Limited 2019.