Description
Kyoritsu KT170 Voltage Testers
The Kyoritsu KT170 is a compact, rugged voltage tester built for fast presence/nominal-level checks on AC and DC circuits up to 690 V. Its pocket-friendly body places a pair of probes, a pen light and a clear LED ladder within easy reach so a single user can quickly verify whether circuits are live without disconnecting wiring. The instrument’s self-diagnostic startup and auto-power-on behavior are aimed at reducing user error before measurements begin.
Measurement behavior emphasizes conservative, safety-minded detection: multiple discrete LED thresholds show nominal voltage bands (12 / 24 / 50 / 120 / 230 / 400 / 690 V) while audible warnings and a “live” indicator draw attention to hazardous conditions. The manual stresses correct probe handling, finger guards and the use of the CAT.III/IV caps so the device can be used confidently on distribution-level equipment in the field.
Designed for electricians and maintenance personnel, the KT170 combines simplicity with useful on-board checks double-pole voltage readout, single-pole live confirmation, phase-rotation indication (on three-phase systems) and continuity detection all packaged as a low-weight tool intended for routine verification and safety checks prior to further work. The documentation repeatedly highlights safe usage, environmental limits and the instrument’s IP65 protection for reliable field service.
Features:
- Self-diagnostic auto-power-on.
- LED ladder for nominal voltages: 12/24/50/120/230/400/690 V.
- Double-pole (both probes) voltage indication (works without batteries for LEDs).
- Single-pole live-circuit detection (with buzzer and live LED).
- Phase-rotation indication (L/R LEDs) for three-phase checks.
- Continuity (Rx) indicator with buzzer.
- Built-in pen light for illuminating measurement points.
- Selectable probe tip diameters and removable CAT.III/IV caps.
- IP65 ingress protection.
Specifications:
| Specification | Value (from PDF) |
|---|---|
| Voltage test range: | 12 … 690 V AC / DC (16…400 Hz) |
| LED nominal voltages & thresholds: | 12 / 24 / 50 / 120 / 230 / 400 / 690 V 12V LED on >7±3V, 24V on >18±3V, 50V on >37.5±4V, 120/230/400/690 LEDs on at 75%±5% of nominal |
| LCD (KT171 only): | Auto-range: 300V (6.0–299.9) 0.1V 690V (270–759 ac / 710 dc) 1V Accuracy ±1.5V (7–100V) / ±1%±5dgt (100–690V) |
| Peak current (at 690V): | IS < 3.5 mA. |
| Measurement duty (voltage): | 30 s ON, 240 s OFF (recovery) |
| Continuity detection: | 0 … 400 kΩ +50% test current ≈1.5 μA |
| Single-pole phase test range: | 100 … 690 V AC (50/60 Hz) |
| Phase rotation test: | Three-phase 4-wire: 200…690 V phase-to-phase (100…400 V earth-to-phase) Phase angle 120°±5° |
| Response times: | LEDs: <0.6 s at 100% nominal LCD: ≈1 s at 90–110% (KT171) |
| Power / Battery life: | 2 × LR03 (IEC AAA) 1.5 V battery life ≈1000 ops (30s ON / 240s OFF) |
| Environmental / Safety: | Operating −15…55°C storage −20…70°C (KT170) IP65 IEC(EN)61010-1 / 61243-3 / 61010-031 / 61557-7 CAT.III 690V, CAT.IV 600V |
| Size / Weight: | 246 × 64 × 26 mm 190 g (incl. batteries) |
Applications:
- Double-pole voltage verification (AC/DC).
- Single-pole live-circuit detection prior to work.
- Phase-rotation checks on three-phase systems.
- Continuity checks and basic circuit verification.
- Voltage Test (Double-pole Test):
-
Single-pole Phase Test:
- Variable top tips:
-
Store the attachment of caps:
- Probe Protection Cover:
- 4mm Tips Replacement:
How to fixing 4mm Tips on L1 probe- and L2 probe+
Package Contents:
- 1x KT170 instrument (with integral L1/L2 probes and probe protection cover)
- 2x Changeable 4 mm probe tips / selectable tip diameters 2 tips (L1 & L2)
- 1x CAT.III/IV caps (4 mm test tip caps) set for probes
- 1x Set Probe clip / Finger guard / Probe protection cover each 1 (parts of the probe assembly)
- 2x Batteries IEC LR03 (AAA)
- 1x Instruction manual
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