Description
Martindale ET4 AC/DC Electrical Tester
The Martindale ET4 AC/DC Electrical Tester is a compact electrical tester that measures AC/DC voltage, resistance and AC/DC current. It will also measure frequency, continuity and will take simultaneous measurement of current/voltage and frequency/voltage. This electrical tester can be used as a non-contact voltage indicator and has auto ranging, display hold and auto power off functions.
One of the forks has a forward facing LED light to illuminate the area in the front.
The ET4 is supplied with TL17 test leads, a soft carry case, 9V battery and 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 |