HIOKI เครื่องวัดความต้านทานดิน, เครื่องวัดลำดับเฟส, เครื่องตรวจหากระแสไฟฟ้า Ground Resistance, Phase Rotation, Voltage Detection

Analog earth resistance meter utilizing the AC phase differential system to measure grounding resistance
3- or 2- pole method
Supports Class A to Class D ground types
Classical dial type

Model	PD3259-50	PD3129-10	PD3129	3481-20
Appearance
Detection functions	Phase detection, open phase, prediction of ground phase (Three-phase line	Phase detection (positive and negative)	Phase detection (positive and negative)	Voltage detection
Measurement range	Three-phase AC voltage 90.0 V to 520.0 V AC (Three-phase line)	Voltage 70 to 1000 V AC (continuous sine wave)	Voltage 70 to 600 V AC (continuous sine wave)	40 to 80 V AC (50Hz/60Hz)
Frequency range	45 Hz to 66 Hz	45 Hz to 66 Hz	45 Hz to 66 Hz
Measurement targets	ø6 to 30 mm	ø7 to 40 mm	ø2.7 to 17 mm	Pen-style, Non-contact detection
Indication	Simultaneous Digital Display of 3-phase voltage	Positive: 4 LEDs lit in clockwise order and the buzzer sounds intermittently, green arrow lights up Negative: 4 LEDs lit in counterclockwise order and the buzzer sounds continuously		Red LED lights up and the buzzer sounds when the wire is live
Safety standard categories	CAT IV 600 V	CAT IV 600 V, CAT III 1000 V	CAT IV 600 V	CAT IV 600 V
Power supply	LR6 alkaline battery ×4	R6P manganese battery × 2		LR44 button alkaline battery × 3
Dimensions	84 x 146 x 46 mm	70 x 75 x 30 mm		20 x 126 x 15 mm
Weight	590 g	240 g	200 g	30 g