MAJOR TECH MT328 Industrial RCD Tester Instruction Manual

: June 9, 2024
: MAJOR TECH

Table of Contents

MAJOR TECH MT328 Industrial RCD Tester
SAFETY
SPECIFICATIONS
FEATURES
CONNECTIONS
INSTRUMENT LAYOUT
RCCB / ELCB TESTING – SENSITIVITY
RCCB/ELCB TESTING – TIME DELAY
PREPARATION FOR MEASUREMENT
FUSE REPLACEMENT
CLEANING AND STORAGE:
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

MAJOR TECH MT328 Industrial RCD Tester

MAJOR-TECH-MT328-Industrial-RCD-Tester-PRO

SAFETY

Safety notes
Rated environmental conditions:

Indoor use
Installation category III
Pollution degree 2
Altitude up to 2000 meter
Relative humidity 80% max.
Ambient temperature -5°C ~ 45°C

Observe the international electrical symbols listed below:

Meter is protected throughout by double insulation or reinforced insulation.
Warning! Risk of electric shock.
Caution! Refer to this manual before using the meter

Safety Precautions
Electricity can cause severe injuries even with low voltages or currents. Therefore it is extremely important that you read the following information before using your digital RCCB / ELCB Tester.

This instrument must only be used and operated by a competent trained person and in strict accordance with the instructions.
Never open your digital RCCB / ELCB tester except for battery replacement. (see battery replacement section)
Always inspect your digital RCCB / ELCB tester and test leads before use for any sign of abnormality or damage. If any abnormal condition exist (broken test leads, cracked case, display faulty etc…) do not attempt to take any measurement or use the tester. Return your digital RCCB /ELCB tester to your nearest distributor for service.
Never replace the protective fuse with any other than the specified or approved equivalent.
Your digital RCCB / ELCB tester has been designed with your safety in mind. However, no design can completely protect against incorrect use. Electrical circuits can be dangerous and lethal when a lack of caution or poor safety practice is used. Use caution in the presence of voltage above 24V as these pose a shock hazard.
Pay attention to cautions and warnings which will inform you of potentially dangerous procedures.

SPECIFICATIONS

Function Range

FEATURES

2 Lines x 16 Characters
Very low consumption
Smart microprocessor controlled
Better than 2% accuracy (current)
Menu driven
Accurate digital readout of disconnection time.
Accurate digital readout of disconnection sensitivity
Data hold function
Zero crossing circuitry permit testing at 0° or 180°
Disconnection phase polarity shown on LCD display
Auto-Off
Polarity trip indicator (positive or negative phase)

CONNECTIONS

$MAJOR-TECH-MT328-Industrial-RCD-Tester- $1$$

INSTRUMENT LAYOUT

On switch – Test button switch
Selection switch – 0°-180° switch
Current selection knob
LCD display

RCCB / ELCB TESTING – SENSITIVITY

Turn instrument “ON” by pressing the “ON” button. The LCD display will come to the following screen.
Push select to change selection to instantaneous, than press “TEST”
Dial the starting current of the instantaneous test using the knob.
Select the Positive or Negative Start Edge using the select button.
Connect leads to earth and phase. The test will start automatically. Test In progress. The voltage between leads is 317V and I=127mA
TRP=Tripped, Display on Hold at 140mA, Tripped on – edge of signal.

RCCB/ELCB TESTING – TIME DELAY

Turn instrument “ON” by pressing the “ON” button. The LCD display will come to the following screen.
Push select to change selection to Time Delay, than press “TEST”
Dial the starting current of the Time Delay test using the knob.
Select the Positive or Negative Start Edge using the select button.
Connect leads to Earth and Phase. The test will start automatically.
Test in progress since 4.023s. The voltage between leads is 317V and constant current is 125mA
TRP=Tripped, Display on Hold at 12.435s Tripped on + edge of signal.

PREPARATION FOR MEASUREMENT

Before testing Always Check the following:
At Power “ON”, read the display to make sure the “Replace Battery” message do not appears. There is no visual damage to the instrument or test leads. Test lead continuity with a continuity meter.

BATTERY REPLACEMENT
Your digital RCCB / ELCB tester’s battery is situated under the tester. Your smart-test display will indicate you when the battery need to be replaced. Disconnect the tester leads from the instrument, remove the battery cover and the batteries. Replace with eight 1.5V R6 or L6 batteries, taking care to observe correct polarity. Replace battery holder and the battery cover.

FUSE REPLACEMENT

The fuse is located under the battery holder. To replace the fuse, proceed as per battery replacement to open the battery cover, then remove and replace the fuse located under the battery holder. Only replace with the same specification fuse (1A/600V, 5x20mm Fast Below).

SERVICING AND CALIBRATION
Your digital RCCB / ELCB tester has been factory calibrated. However, it is of good practice to have your instrument “CERTIFIED” by a national calibration facility.

CLEANING AND STORAGE:

WARNING: To avoid electrical shock or damage to the Multi-function tester, do not get water inside the case.
Periodically wipe the case with a damp cloth and detergent; do not use abrasives or solvents. If the meter is not to be used for periods of longer than 60 days, remove the batteries and store them separately.

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