| MI 3125 BT | MI 3100 SE | MI 3152 | MI 3155 |
| Screen type | | | | |
| Monochrome dot matrix | | | | |
| Full colour dot matrix | | | | |
| Touch screen | | | | |
| Instrument control | | | | |
| Rotary switch | | | | |
| Push keys | | | | |
| Functions | | | | |
| 3-wire Trip-Lock RCD function, with no reported RCD uplift | | | | |
| Hi current loop test for L-L and L-N testing and where there is no RCD | | | | |
| PFC and PSCC displayed with loop impedance | | | | |
| Operating frequency | 45Hz to 65Hz | 45Hz to 65Hz | 45Hz to 65Hz | 14Hz to 500 Hz |
| Earth loop impedance ranges | | | | |
| 3-wire loop test | | | | |
| Fuse tables on-board for instant pass or fail | | | | |
| Z auto func., Ze, Zs, PFC, PSCC and touch voltage with the single press of test button | | | | |
| Ultra-low current test for vehicle charge point testing | | | | |
| Supports Hi resolution testing with A 1143 adapter | | | | |
| 4-wire loop test for result close to the source of supply | | | | |
| 50V, 100 V, 250 V, 500 V and 1 kV test voltages | | | | |
| 2.5 kV test voltage | | | | |
| Applied voltage display | | | | |
| Insulation test ranges | | | | |
| Pass of fail against pre-set limits | | | | |
| AUTO L-PE, N-PE and L-N testing | | | | |
| Surge protection or varistor testing | | | | |
| Diagnostic tests PI and DAR | | | | |
| AC RCD rating 10 mA, 30 mA, 100 mA, 300 mA, 500 mA and 1000 mA | | | | |
| RCD Type A, Type AC, Type F | | | | |
| RCD Type B and Type B+ - pure DC | | | | |
| Standard or time delayed | | | | |
| RCD testing ranges | | | | |
| Portable RCDs type PRCD, PRCD-2P, PRCD-3P, PRCD- S, PRCD- S+ & PRCD- K | | | | |
| EV RCM / EV RCD 30 mA AC and 6 mA DC* | | | | |
| Phase or polarity | 0 / 180 | 0 / 180 | 0 / 180 | 0 / 180 |
| ½I, I and 5I tests | | | | |
| Ramp test for RCD fault finding | | | | |
| Continuity and low R range | | | | |
| Auto RCD test for trip time and trip current displayed on a single screen, no scrolling | | | | |
| 7 mA test current for continuity check through RCD & prolonged battery life | | | | |
| Adjustable Pass/ fail indicator light limits | | | | |
| Adjustable buzzer threshold | | | | |
| AUTO SEQUENCE | | | | |
| Pre programmed | | | | |
| User programmable | | | | |
| Testing TN and TT earthing systems | | | | |
| Testing IT, floating earth systems | | | | |
| Voltage, frequency and phase rotation range | | | | |
| 0 V to 550 V AC resolution 1V | | | | |
| Single-phase TN/ TT systems displays L-N, L-PE , N-PE in single screen | | | | |
| 3-phase TN/ TT systems displays L1-L2, L1-L3 , L2-L3 in single screen | | | | |
| True RMS measurement | | | | |
| Frequency | 0Hz to 500 Hz | 0Hz to 500 Hz | 0Hz to 500 Hz | 0Hz to 500 Hz |
| Phase rotation | | | | |
| Voltage Drop measurement | | | | |
| Power quality range | | | | |
| Active power (P), Apparent power (S) and Reactive power (Q) | | | | |
| Power factor, Total harmonic distortion (THD) | | | | |
| Voltage harmonics and THD | | | | |
| Current harmonics and THD | | | | |
| Earth electrode resistance range | | | | |
| 3-wire technique | | | | |
| Selective method with 3-wires and clamp* | | | | |
| 4-wire earth resistivity* | | | | |
| 2 clamps contactless method* | | | | |
| Earth test set supplied | | | | |
| Active safety system | | | | |
| Auto-test inhibit | | | | |
| Auto- discharge | | | | |
| Auto PE test | | | | |
| Touch voltage monitoring | | | | |
| Results handling / on-board memory | | | | |
| On-board memory size | 3 levels / 1700 locations | 3 levels / 1700 locations | 8 GB | 8 GB |
| Memory management | | | | |
| Workspace manager | | | | |
| Full keyboard for labelling files and results in plain English | | | | |
| USB, RS232 and bluetooth® connectivity | | Optional accessory | | |
| QR and, or barcode scanner support* | | | | |
| FREE Electrical Safety Management Basic software license | | | | |
| Other benefits | | | | |
| Rechargeable batteries with on-board recharging | | | | |
| TRMS leakage and load measurement* | | | | |
| Illuminance measurement* | | | | |
| Cable tracing* | | | | |
| Insulation monitoring device testing - IT systems | | | | |
| First fault leakage current measurement - IT systems | | | | |
| Records visual inspection | | | | |
| Full set of test, download and recharge leads | | | | |
| Soft test and carry bag | | | | |
| Firmware user updatable for product’s lifetime | | | | |
| Safety rating | CAT IV 300 V | CAT IV 300 V | CAT IV 300 V | CAT IV 300 V |
| * Tester enabled but optional accessories required
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