HIOKI -  AC Clamp Meter CM3281, CM3291
Brand: Hioki
Model: CM3281, CM3291

Specifications

Basic accuracy figures for measurement ranges are indicated in parentheses. Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year, Product warranty period is 3 years.
 

AC measurement method	CM3281: MEAN Value CM3291: True RMS
Core jaw diameter	Φ 46 mm (1.81 in)
Max. rated voltage to earth	Jaw: CAT IV 300 V, CAT III 600 V Voltage measurement terminal: CAT III 300 V, CAT II 600 V
AC current	42.00 A/ 420.0 A/ 2000 A (±1.5% rdg.±5 dgt.)
Frequency charac- teristics	CM3281: 50 Hz to 60 Hz CM3291: 40 Hz to 1 kHz
AC voltage	4.200 V to 600 V, 4 ranges (±1.8% rdg.±7 dgt.)
Frequency charac- teristics	45 Hz to 500 Hz
DC voltage	420.0 mV to 600 V, 5 ranges (±1.0% rdg.±3 dgt.)
Resistance	420.0 Ω to 42.00 MΩ, 6 ranges (±2.0% rdg.±4 dgt.)
Continuity check	420.0 Ω (±2.0% rdg.±4 dgt.) Threshold of buzzer sound 50 Ω ±40 Ω or less
Crest factor (Only for CM3291)	2.5 at 2500 count or less (linearity reduced to 1.5 or less at 4200 counts), (1.5 or less at 2000 A range)
Display refresh rate	400 ms
Operating temperature and humidity	−25°C to 65°C (−13°F to 149°F), 80% RH or less (no condensation)
Storage temperature and humidity	−25°C to 65°C (−13°F to 149°F), 80% RH or less (no condensation)
Drop-proof distance	1 m (3.28 ft) onto concrete
Standards	Safety: EN 61010, EMC: EN 61326
Functions	Data hold, Auto power-saving function
Power supply	Coin type lithium battery CR2032 × 1
Continuous use	CM3281: 120 hours, CM3291: 70 hours
Dimensions and mass	57 mm (2.24 in)W × 198 mm (7.80 in)H × 16 mm (0.63 in)D, 103 g (3.6 oz)
Accessories	Carrying Case, Test Lead L9208, Coin type lithium battery CR2032, Instruction Manual, Operating Precautions