User manual for the HT HTM70 series portable tester covering insulation, grounding, continuity and voltage measurements.
The HT HTM70 series is a portable, multi‑function instrument for testing power installations. It provides insulation resistance, grounding resistance, continuity, AC/DC voltage and true‑RMS measurements and complies with EN61557 and EN61010 standards.
The manual describes the features of each model (M70, M71, M72, M73, etc.), technical specifications, operating procedures, safety information and optional accessories. This manual is written in Chinese.
| Insulation resistance test voltage | 1000 VDC |
|---|---|
| Ground resistance measurement range | up to 50 kΩ |
| Maximum AC/DC voltage measurement | 600 V |
| Battery type | 4 × 1.5 V LR6AAMN1500 |
| Display | 4‑digit LCD, 9999 reading with decimal point |
| Dimensions (W×L×D) | 240 mm × 100 mm × 45 mm |
| Weight (including battery) | ≈ 450 g (M70) |
| Sampling speed | 0.5 s per reading |
The M70 can test insulation resistance up to 1000 VDC.
It uses four 1.5 V LR6AAMN1500 batteries.
The instrument samples at 0.5 seconds per reading.
It complies with IEC/EN61010‑1, IEC/EN61557‑1, IEC/EN61557‑5 and related European CE standards.