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2.2. Output Terminals ~
Green E (EXC) Terminal – Earth Electrode
Black ES (EXT) Terminal – Voltage Electrode
Blue S (ET) Terminal – Voltage Electrode
Red H (EC) Terminal – Current Injection
E - ES - S - H: Standard nomenclature currently recommended by the IEC.
EXC - EXT - ET - EC: Nomenclature traditionally used by Megabras earth
meters. It is maintained to make migration easy.
Having the function selector switch in the R position (grounding resistance
measurement) the E and ES terminals are internally shorted. The ES
terminal is not used for this measurement.
2.3. Internal battery
The MTD-20KWe has a built-in rechargeable battery. Furthermore, it can be
powered by means of an external 12 V battery.
2.4. Battery status check ~
Before starting each test, it is recommended to check if the internal battery
has enough charge. This can be done by pressing the Battery Test
Pushbutton+. The value shown on the display must be higher than
1000. If it is not, the battery needs to be charged. This checking can be
repeated during measurements, under the equipment highest consumption
conditions.
2.5. Power supply source ~
The power supply source provided can be connected to 220-240 V~ mains.
It is used to charge the battery.
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