AC/DC CLAMP METER
CM4373
True RMS 2000 A AC/DC Clamp Meter for the Toughest Situations
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Hioki clamp meters are best-in-class measuring devices incorporating Hioki’s expertise in current sensing technology. The CM4373 is a 2000A True RMS clamp meter that features stronger jaws, broader -25℃ to 65℃ operating temperature range and IP54 dustproof and waterproof enclosure to enable professionals to work quickly in tough situations including the development, repair, and maintenance of equipment and devices such as electric vehicles. Additionally, the high-voltage DC measurement capability of up to 1700 V (*1) is ideal for the clamp maintenance inspections of electrical and solar power equipment. CAT IV 600 V, CAT III 1000 V Key Features • Multiple measurement functions • Automatic AC/DC function helps boost work efficiency • Measure DC voltages of up to 1700 V (*1) • Simultaneously measure inrush current in RMS and crest values • Expanded -25 °C to 65 °C operating temperature range • IP54 dustproof and waterproof enclosure *Jaws (current sensor portion): IP50 *1 Your instrument can be used to measure voltages in excess of 1000 V DC if and only if both of the following conditions are satisfied: 1. The circuit under measurement is isolated from the commercial power grid. 2. The circuit under measurement is isolated from ground.
Model No. (Order Code)
| CM4373 |
|---|
Key Features
• Multiple measurement functions such as current, voltage, resistance, frequency, and voltage detection • Simultaneously measure inrush current in RMS and crest values • Damage-resistant jaws (current sensor) provide even more years of reliable use. • Expanded -25 °C to 65 °C operating temperature range • IP54 dustproof and waterproof enclosure *Jaws (current sensor portion): IP50 • Automatic AC/DC function helps boost work efficiency • Remain alert to hazards with a red backlight and beeping tone • Measure DC voltages of up to 1700 V
How to Use the Hioki CM4370 Series Clamp Meters
Auto Hold Function:
The Auto Hold feature is perfect in situations where the display is hard to read because the clamped wires are in hard to reach locations. With Auto Hold, measured results automatically freeze on the display until the next measurement starts, making testing and record taking a snap.
How to Use the Hioki CM4370 Series Clamp Meters
AC Voltage Detection Function:
The tip of the current sensor of the CM4370 Series can also detect live voltages, eliminating the need for you to use a separate voltage detector. Energized lines are identified with a loud buzzer and red LED on the clamp meter.
Basic specifications (Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year)*1 Your instrument can be used to measure voltages in excess of 1000 V DC if and only if both of the following conditions are satisfied: 1. The circuit under measurement is isolated from the commercial power grid. 2. The circuit under measurement is isolated from ground.
| DC Current range | 600.0 A/2000 A, Basic accuracy: ±1.3% rdg. ±0.3 A (600 A range) |
|---|---|
| AC Current range | 600.0 A/2000 A (10 Hz to 1 kHz, True RMS), Basic accuracy: ±1.3% rdg. ±0.3 A (at 600 A) |
| Crest factor | 600.0 A range: 3 or less, 2000 A range: 2.84 or less |
| DC+AC Current range | 600.0 A/2000 A (10 Hz to 1 kHz, True RMS), Basic accuracy DC, 45-66 Hz: ±1.3% rdg. ±1.3 A (at 600 A) |
| DC Voltage range | 600.0 mV to 1500 V (*1), 5 ranges, Basic accuracy: ±0.5% rdg. ±0.5 mV (at 600 mV) |
| AC Voltage range | 6.000 V to 1000 V, 4 ranges (15 Hz to 1 kHz, True RMS), Basic accuracy 45 - 66 Hz: ±0.9% rdg. ±0.013 V (at 6 V) |
| DC+AC Voltage range | 6.000 V to 1000 V, 4 ranges, Basic accuracy DC, 45 - 66 Hz: ±1.0% rdg. ±0.023 V (at 6 V) |
| Resistance range | 600.0 Ω to 600.0 kΩ, 4 ranges, Basic accuracy: ±0.7% rdg. ±0.5 Ω (at 600 Ω) |
| Capacitance range | 1.000 μF to 1000 μF, 4 ranges, Basic accuracy: ±1.9% rdg. ±0.005 μF (at 1 μF) |
| Frequency range | 9.999 Hz to 999.9 Hz, 3 ranges, Basic accuracy: ±0.1% rdg. ±0.003 Hz (at 9.999 Hz) |
| Temperature (K) | -40.0 to 400.0 ˚C, add temperature probe accuracy to basic accuracy of ±0.5% rdg. ±3.0 ˚C |
| Voltage detection | Hi: 40 V to 600 V AC, Lo: 80 V to 600 V AC, 50/60 Hz |
| Other functions | Automatic AC/DC detection, Plus/Minus judgement function of DC A, DC V, Max/Min/Average/PEAK MAX/ PEAK MIN value display, Filter function, Display value hold, Auto hold, Back light, Auto-power save, Buzzer sounds, Zero-adjustment |
| Dustproof, waterproof | Grip: IP54 (when measuring an insulated conductor only), Jaw (the current sensor portion of the instrument)/ barrier: IP50 *Risk of electric shock from the conductor being measured increases when wet. |
| Power supply | LR03 Alkaline battery ×2, Continuous use 45 hr (Backlight OFF) |
| Core jaw diameter | φ55 mm (2.17 in), Jaw dimension: 92 mm (3.62 in) W×18 mm (0.71 in) D |
| Dimensions and mass | 65 mm (2.56 in) W×250 mm (9.84 in) H×35 mm (1.38 in) D mm, 530 g (18.7 oz) |
| Accessories | TEST LEAD L9207-10, CARRYING CASE C0203, LR03 Alkaline battery ×2, Instruction Manual×1 |
Log into your myHioki account to access more technical documents and information where available.
Seminar Videos On Demand
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Seminar Schedule
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Catalogs
| Catalog: AC/DC CLAMP METER, AC CLAMP METER CM4000 series | Download PDF [6MB] |
English |
| Catalog: CLAMP METER Series | Download PDF [6MB] |
English |
User Guides
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Manuals
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| Operating Precautions |
Japanese English |
Ver.00 | |
| Instruction Manual |
English |
Ver.04 | |
| Instruction Manual |
English Spanish German French |
Ver.02 | |
| Instruction Manual |
Simplified Chinese |
Ver.04 | |
| Instruction Manual |
Korean |
Ver.02 |
Outline Drawings
If you can not download, log into your myHioki account to access more technical documents and information where available.
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AC/DC CLAMP METER CM4373,CM4373-20,CM4373-21,CM4373-30,CM4373-31,CM4373-40 [146KB] |
Ver.02 |
Technical Notes
Declaration of Conformity
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AC/DC CLAMP METER CM4371,CM4372,CM4373,CM4374 [109KB] |
Ver.04 |
Drivers, Firmware
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Others
| Flyer: Usable temperature range Max.65°C Max.-25°C | Download PDF [1MB] |
English |
Options
Test leads
Options for the L9207-10 (L9207-10 is a bundled accessory)
CONTACT PIN SET L4933
Attaches to the tip of the Test Lead L9207-10/DT4911, L9206, 60V DC/ 30V AC
SMALL ALLIGATOR CLIP SET L4934
Attaches to the tip of the L4932, L9207-10/DT4911, L9206, CAT III 300 V, CAT II 600 V
TEST LEAD L9207-10
90 cm (2.95 ft) length
Options for test leads
Options for the L4930, Test Pin Set L4932 is required when using the Small Alligator Clip Set L4934
GRABBER CLIP 9243
Attaches to the tip of the banana plug cable, Red/ Black: 1 each, 196 mm (7.72 in) length, CAT III 1000 V
CONNECTION CABLE SET L4930
1.2 m (3.94 ft) length, CAT IV 600 V, CAT III 1000 V
EXTENSION CABLE SET L4931
Expands the length of L4930/4940, 1.5 m (4.92 ft) length
TEST PIN SET L4932
Attaches to the tip of the L4930/4940, CAT IV 600 V, CAT III 1000 V
SMALL ALLIGATOR CLIP SET L4934
Attaches to the tip of the L4932, L9207-10/DT4911, L9206, CAT III 300 V, CAT II 600 V
ALLIGATOR CLIP SET L4935
Attaches to the tip of the L4930/4940, CAT IV 600 V, CAT III 1000 V
BUS BAR CLIP SET L4936
Attaches to the tip of the L4930/4940, CAT III 600 V
MAGNETIC ADAPTER SET L4937
Attaches to the tip of the L4930/4940, CAT III 1000 V
TEST PIN SET L4938
Attaches to the tip of the L4930/4940, CAT III 600 V
BREAKER PIN SET L4939
Attaches to the tip of the L4930/4940, CAT III 600 V
Temperature measurement
THERMOCOUPLES(K) DT4910
K type, tip exposed, 0.3 mm (0.01 in) diameter, 80 cm (2.62 ft) length, -40 to 260 °C (-40 to 500 °F), tolerance ±2.5 °C
Other options
Bundled accessory
CARRYING CASE C0203
Gallery
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