Martindale ET4 Multifunctional Electrical Tester
Despite its compact nature, Martindale's ET4 is capable of a lot. It can carry out testing of DC voltage, AC voltage, DC and AC current, frequency, resistance and also performs continuity and diode testing. It can also be used to detect the presence of voltage from 70V to 600V thanks a built-in non-contact voltage detector.
For any practising electricians, having access to all of these functions on one device makes testing as simple as possible. The ET4 can even be used to take simultaneous measurements of current/voltage and frequency/voltage, further speeding up testing.
Test results are shown through a built-in LCD screen on the front of the device and the mode can be easily adjusted by turning a rotary dial on the front of the tester.
Additional functions of the Martindale ET4 include autoranging, a display hold function which freezes the last reading taken and an auto shut down facility which will activate when the tester is left idle.
Martindale ET4 Multifunctional Electrical Tester Key Features
- Compact, lightweight design
- Built-in non-contact voltage detector
- DC and AC voltage measurements
- DC and AC current measurements
- Frequency measurements
- Resistance measurements
- Continuity and diode testing
- Dual display can be used to measure current/voltage and frequency/voltage at the same time
- Simple to use
- Built-in LCD screen
- Autoranging
- Data hold
- Auto power off
Full List of Products Included
- Martindale ET4 Multifunctional Electrical Tester
- TL17 Test Leads
- Soft Carry Case
- 9V Battery
- Instruction Manual
Martindale ET4 Technical Specifications
Electrical
All specified accuracies are at 23°C ± 5°C <75% RH for 1 year.
Temperature Coefficient: <0.1 x (specified accuracy) per °C (0°C to 18°C, 28°C to 40°C)
DC Voltage
| Range | Resolution | Input Impedance | Accuracy |
| 500mV | 0.1mV | 1.1MΩ | ± (0.5% of rdg + 2 dgts) |
| 5V | 0.001V | 1MΩ | |
| 50V | 0.01V | ||
| 500V | 0.1V | ||
| 600V | 1V |
Overload Protection: 600V DC or AC rms
AC Voltage
| Range | Resolution | Input Impedance | Accuracy |
| 500mV | 0.1mV | 1MΩ |
Not specified |
| 5V | 0.001V | 50-60Hz ± (1.2% of rdg + 5 dgts) 60-500Hz ± (2.0% of rdg + 5 dgts) |
|
| 50V | 0.01V | ||
| 500V | 0.1V | ||
| 600V | 1V |
Overload Protection: 600V DC or AC rms
DC Current
| Range | Resolution | Accuracy |
| 200A | 0.1A | ± (2.0% of rdg + 5 dgts) |
Maximum input current: 200A
AC Current
| Range | Resolution | Accuracy (50 to 60Hz) |
| 200A | 0.1A | ± (2.0% of rdg + 5 dgts) |
Maximum input current: 200A
Frequency
Frequency measurement using AC current range
| Range | Resolution | Accuracy |
| 30Hz to 400Hz |
0.1Hz | ± (0.1% of rdg + 5 dgts) |
Input sensitivity > 10A AC rms
Maximum input current: 200A AC rms
Resistance
| Range | Resolution | Open Circuit Voltage | Accuracy |
| 500Ω | 0.1Ω | -3.2V DC | ± (1.0% of rdg + 5 dgts) |
| 5kΩ | 0.001kΩ | 1.1V DC Approx | |
| 50kΩ | 0.01kΩ | ||
| 500kΩ | 0.1kΩ | ||
| 5MΩ | 0.001MΩ | ± (1.5% of rdg + 5 dgts) | |
| 50MΩ | 0.1MΩ | ± (3.0% of rdg + 5 dgts) |
Overload Protection: 600V DC or AC rms
Continuity
| Range | Resolution | Response Time | Accuracy |
| 500Ω | 0.1Ω | 100ms | <30Ω |
Overload protection: 600V DC or AC rms
Additional Technical Specifications can be found in the attached datasheet.
| SKU | MARET4 |
|---|---|
| Manufacturer Part Code | MARET4 |
