Description
HT IMP57 High Resolution Impedance Measurements Adapter
The HT IMP57 High Resolution Impedance Measurements Adapter provides accurate loop and line impedance testing across P-P, P-N, and P-PE points. It operates as a slave unit, linking seamlessly with compatible HT master instruments through an RS-232 serial lead. As a blind device with no display, it is designed to function in real-time collaboration with the host tester.
Because the HT IMP57 is powered directly by the electrical system under test, there’s no need for batteries. This simplifies setup and ensures reliable power delivery during each measurement. The device offers precise readings down to 0.1mΩ, making it ideal for detailed line testing.
High Resolution Testing
Using a true 4-wire method, this adapter separates current injection from voltage sensing, effectively eliminating errors caused by lead resistance. Dual-contact alligator clips manage both functions—red sides handle current (C1, C2) and black sides manage voltage (P1, P2)—to ensure clean signal separation and accurate results.
Safety and Practical Benefits
It measures voltage, calculates prospective short circuit current, and confirms system frequency, while a front-panel LED signals operation. Thanks to its compact size and passive design, the HT IMP57 is portable and easy to deploy on live systems. For engineers working to confirm protection devices and circuit integrity, it provides a vital layer of insight.
Key Features
- Measures P-P, P-N, and P-PE loop impedance
- Calculates minimum and maximum short circuit current
- Resolution down to 0.1 milliohm
- Uses true 4-wire measurement technique
- Powered by the live system under test
- RS-232 connection to compatible HT instruments
- LED operational status indicator on front panel
- Measures system voltage and frequency
- Compact and lightweight for portability
- Does not require internal battery power
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