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Summary of Contents for Hioki CM4375
- Page 1 CM4375 Instruction Manual CM4376 AC/DC CLAMP METER Sept. 2018 Edition 1 CM4375A961-00 18-09H GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
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Page 3: Table Of Contents
Contents Introduction ..................... 1 Notation ......................2 Verifying Package Contents ................4 Options (sold separately)................5 Usage Notes ....................6 Overview Product Overview and Features ............11 Part Names ..................12 Making Measurements Inspection Before Measurement ............13 Current Measurement ................ 14 Manual Hold / Auto Hold .............. - Page 4 Contents Backlight / Auto Power Save (APS) ............. 30 Power-on Option Table ............... 31 ............... 33 ....... 35 Accuracy Table ................... 42 Repairs, Inspections, and Cleaning Troubleshooting .................. 57 Error display ..................59 Insert/Replace Batteries ..............60 Cleaning ..................... 61 Index GlobalTestSupply www.
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Page 5: Introduction
Introduction Thank you for purchasing the Hioki CM4375, CM4376 AC/DC Clamp Meter. To obtain maximum performance from the instrument over the long term, be sure to read this manual carefully and keep it handy for future reference. Read the separate document “Operating Precautions” carefully before using the instrument. -
Page 6: Notation
Notation Notation Indicates cautions and hazards. Refer to the "Usage Notes" (p. 6) section of the instruction manual and the included “Operating Precautions” for more information. Indicates that the instrument may be connected to or disconnected from a live conductor. Screen display The instrument screen displays the alphanumeric characters as follows. - Page 7 Notation Accuracy following meanings: f.s. (maximum display value/range) The maximum displayable value. This is usually the name of the currently selected range. rdg. (displayed value) The value currently being measured and displayed on the measuring instrument. dgt. (resolution) The smallest displayable unit on a digital measuring instrument, i.e., the input value that causes 索...
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Page 8: Verifying Package Contents
Verifying Package Contents Verifying Package Contents Model CM4375 or CM4376 Model L9207-10 Test Lead AC/DC Clamp Meter Model C0203 Carrying Case LR03 Alkaline battery ×2 Instruction Manual* Operating Precautions (0990A907) Precautions Concerning Use of Equipment that Emits Radio Waves (only for model CM4376) * Instruction manuals may also be available in other languages. -
Page 9: Options (Sold Separately)
Options (sold separately) Options (sold separately) L4933 Contact Pin Set L4934 Small Alligator Clip Set L9207-10 Test Lead L4935 Alligator Clip Set 9243 Grabber Clip L4930 Connection Cable Set (Length: 1.2 m) L4936 Bus Bar Clip Set L4931 Extension Cable Set * L4937 Magnetic Adapter Set (Length: 1.5 m, with the coupling connector) -
Page 10: Usage Notes
Usage Notes Usage Notes functions. Read the separate document “Operating Precautions” carefully before using the instrument itself, but also of any accessories, options, batteries, and other equipment being used. DANGER See: "1.2 Part Names" (p. 12) GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com... - Page 11 Usage Notes WARNING apply to insulated conductors.) CAUTION Do not place any foreign object between the jaws or any insert foreign object into the gap of the sensor head. Doing so may worsen the performance of the sensor or the opening-closing operation of the sensor head.
- Page 12 Usage Notes Test Lead WARNING Conforms to safety standards IEC61010 or EN61010 Measurement category III or IV category and rated voltage. measurement categories. CAUTION The cable is hardened in freezing temperatures. Do not bend or pull it to avoid tearing its shield or cutting cable.
- Page 13 Usage Notes DANGER CAUTION Do not subject the Magnetic Adapter Set to mechanical shock, for example, due to dropping it. Shock can cause it to be chipped or cracked. Do not use the Magnetic Adapter Set in locations where it may be exposed to rainwater, dust, or condensation.
- Page 14 Usage Notes GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
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Page 15: Overview
Overview 1.1 Product Overview and Features This instrument is a clamp meter that can Measurement function list perform true RMS measurement of current DC current/DC voltage, DC power simply by clamping it around a circuit. In addition to current, it provides voltage Capacitance, temperature measurement, frequency measurement, rush current measurement, resistance measurement,... -
Page 16: Part Names
Overview 1.2 Part Names Front Rear Operation grip Jaw open/closed mark (The jaws are open if the mark is not showing.) SHIFT (Selects function indicated in blue lettering.) Barrier Serial number (The serial number consists of the year of manufacture, and the next two indicate the month of manufacture.) Rotary switch HOLD... -
Page 17: Making Measurements
Making Measurements 2.1 Inspection Before Measurement Check if there is any damage to the instrument occurred during storage or shipping and authorized Hioki distributor or reseller. Check item The battery cover is closed and its screw has There is no damage to the test lead been securely tightened. -
Page 18: Current Measurement
Current Measurement 2.2 Current Measurement Turn the rotary switch. Clamp the instrument around a conductor. breaker (AC current measurement) Press for 1 sec. Zero adjustment Be sure that the currents direction points the arrow. Frequency detection range of AC current 5.0 A or more DC current polarity detection function (p. -
Page 19: Manual Hold / Auto Hold
Current Measurement Manual Hold / Auto Hold Manual hold Auto hold blinks. Press for 1 sec. Clamp the instrument around a conductor. Measured value retains. (Measured value stabilizes.) Pressing the HOLD key again cancels the measured value hold function. Disconnect Measured value automatically retains. - Page 20 Current Measurement Auto hold conditions current). When the measured value is less than the threshold value described in the table in the next page. described in the table in the next page. Auto hold Auto hold Held measured value e.g.: 99.0 A e.g.: 100.0 A Fluctuation range Fluctuation range...
- Page 21 Current Measurement Measurement function Fluctuation range Threshold value AUTO A Within 120 counts 120 counts AC current DC current AC+DC current AC voltage 6.000 V/60.00 V/600.0 V range: 6.000 V/60.00 V/600.0 Vrange: DC voltage within 120 counts 120 counts (excluding the 600.0 mV range) 1000 V range: within 20 counts 1000 V range: 20 counts AC+DC voltage...
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Page 22: Filter Function
Current Measurement Filter Function FILTER OFF FILTER ON Measured value including noise Measured value with reduced noise Press for 1 sec. Frequency characteristics when using the measurement of power supply frequencies in excess FILTER OFF FILTER ON Passband 100 [Hz] Filter OFF Frequency [Hz] GlobalTestSupply... -
Page 23: Max Value/Min Value/Avg Value/Peak Value
Current Measurement MAX value/MIN value/AVG value/PEAK value Clamp the instrument around a conductor. AUTO Can not be used at (AC A) (DC A) (AC+DC A) (Frequency) (AUTO AC/DC) AUTO AC/DC. Press for 1 sec. Cancel Measured value retains. PEAK MAX Waveform The instrument performs true RMS... -
Page 24: Rush Current (Inrush)
Current Measurement Rush current (INRUSH) Turn off the motor. Press for 1 sec. Turn the rotary switch. INRUSH ON (Rush current Turn on the motor. occurrence) Press for 1 sec. Zero adjustment RMS value (INRUSH) Clamp the instrument around a Example conductor. -
Page 25: Other Measurement Functions
Other Measurement Functions 2.3 Other Measurement Functions Voltage e.g.: commercial power supply (AC voltage measurement) Switch the range AUTO (AUTO AC/DC) (AC V) Black (DC V) (AC+DC V) No overvoltage Do not touch. (Frequency) DC voltage polarity detection function (p. 31) 索... - Page 26 Other Measurement Functions Resistance Diode Continuity Check Zero adjustment Zero adjustment Press for 1 sec. Press for 1 sec. Black Black Black (Red display) GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
- Page 27 Other Measurement Functions Temperature Capacitance Black Model DT4910 Thermocouples (K) Black : DT4910 is broken. To change the temperature display unit: p. 32 索 引 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
- Page 28 Other Measurement Functions Simultaneous display of DC power DC current and DC voltage e.g.: Checking a car battery e.g.: Solar power system maintenance Black Black GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
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Page 29: Bluetooth ® Communications (Only For Cm4376)
® Bluetooth Communications (only for model CM4376) ® 2.4 Bluetooth Communications (only for model CM4376) The CM4376 are clamp-style meters with Bluetooth (Bluetooth low energy) support. When the Bluetooth mobile devices devices). For more information about this Help function in the application software GENNECT Cross. Install the GENNECT Cross on your mobile device. - Page 30 ® Bluetooth Communications (only for model CM4376) Installing the application software GENNECT Cross Play from your Android device. Then download and install the GENNECT Cross. You will need an Apple ID see the attached “Precautions Concerning Use of Equipment that Emits Radio Waves” or go to our website. distributor or reseller.
- Page 31 ® Bluetooth Communications (only for model CM4376) Turning on the Bluetooth function Bluetooth function OFF Bluetooth function ON Press for 1 sec. lights up: Bluetooth function ON 索 引 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
- Page 32 ® Bluetooth Communications (only for model CM4376) Pairing the app with the CM4376 Instrument Settings screen will be displayed. While the mobile device is displaying the Instrument Settings automatically pair it with the instrument (the app can be paired with up to 8 instruments). Allow about 5 to 30 seconds for the CM4376 to pair with the app after being turned on.
- Page 33 ® Bluetooth Communications (only for model CM4376) Making measurements with the Bluetooth function Select the General Measurement Logging (Recording) Waveform Graph function on the Home screen. Help function in the GENNECT Cross. General Measurement Logging (Recording) Waveform Graph Saves measured values from Simple logging (up to 24 hours) Simple oscilloscope multiple channels...
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Page 34: Backlight / Auto Power Save (Aps)
Backlight / Auto Power Save (APS) 2.5 Backlight / Auto Power Save (APS) (Always on) Backlight Auto Power Save (APS) Cancelation method: (p. 31) Backlight OFF No operation for 15 min. You can turn the display back on by pressing a key or by turning the rotary switch. -
Page 35: Power-On Option Table
Power-on Option Table 2.6 Power-on Option Table Move the rotary switch from the “OFF” position to any of the test mode positions while pressing an operation key. Factory Setting Setting Operating instruction setting retained? Canceling the auto power save (APS) function (OFF) (Set each time) DC current and DC voltage polarity... - Page 36 Power-on Option Table Factory Setting Setting Operating instruction setting retained? Press for 1 sec. Switching the temperature unit °C To change the temperature unit: To save the setting: Press for 1 sec. GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
- Page 37 Indoors, pollution degree 2, altitude up to 2000 m (6562 ft.) (p. 25) 索 CM4376) 引 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
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- Page 39 索 引 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
- Page 40 5.0 A or more INRUSH GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
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- Page 45 period period after adjustment 索 引 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
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Page 46: Accuracy Table
– – – GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com... - Page 47 索 引 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
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- Page 49 索 引 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
- Page 50 – – GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
- Page 51 – – – 索 引 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
- Page 52 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
- Page 53 6.0 M 6.0 M 索 引 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
- Page 54 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
- Page 55 – – – 索 引 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
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- Page 57 索 引 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
- Page 58 600.0 to 600.0 600.0 to 600.0 ±0.5 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
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Page 61: Repairs, Inspections, And Cleaning
Repairs, Inspections, and Cleaning 4.1 Troubleshooting Symptom The instrument is indicating an Is the measured current value too small for the instrument’s abnormal measured value. measurement range? Wrap the wire around the jaw one or more times. Each additional wrap of the wire will increase the measured value, so that wrapping it once yields a measured value that is twice the actual value and wrapping it twice yields a measured value that is three times the actual value. - Page 62 Troubleshooting Symptom When readings from the The instrument cannot accurately measure waveforms that contain a instrument are compared with component that falls outside the frequency characteristics range. those of another clamp-on Since the instrument performs true RMS measurement, it can current meter, the measured accurately measure distorted waveforms.
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Page 63: Error Display
ROM error Err 002 When the error appears in the display, Adjustment data it is necessary to repair the instrument. ADC error Please contact your authorized Hioki Err 005 Hardware malfunction distributor or reseller. Bluetooth error Err 008 Hardware malfunction (only for model CM4376) 索... -
Page 64: Insert/Replace Batteries
To prevent instrument damage or an electric shock, use only the screw that are originally installed for securing the battery cover in place. If you have Hioki distributor or reseller. indicator lights up when the battery charge diminishes. Replace the batteries as soon as possible. -
Page 65: Cleaning
Cleaning Screw used to adjust measured values ×3 (Do not adjust) Do not adjust any screws other than the screw holding the battery cover in place. Do not adjust the three screws underneath the cover, which are used to adjust measured values, as doing so may prevent accurate measurement. - Page 66 Insert/Replace Batteries GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
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Page 67: Index
Index AC current ..........17, 42 DC current ........17, 24, 43 AC+DC current ........17, 44 DC power..........24, 56 AC+DC voltage ........17, 51 DC voltage ........ 17, 24, 31, 49 AC voltage ..........17, 46 Diode ..........17, 22, 54 Auto hold .......... - Page 68 Index Jaw ............7, 12 Serial number ........12, 31 Manual hold ..........15 Temperature ......... 23, 55 MAX value ..........19 Test lead ..........5, 8, 58 Measurement function ....11, 17, 21 MIN value ........... 19 Mobile device........11, 25 Voltage..........
- Page 69 (including via network connections) 8. Hioki reserves the right to decline to perf o rm repair, calibration, or other service f o r products for which a certain amount of time has passed since their manufacture, products whose parts have been discontinued, and products that cannot be repaired due to unforeseen circumstances.
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- Page 72 • � l!l� 1808EN Edited and published by HIOKI E.E. CORPORATION Printed in Japan ·CE declarations of conformity can be downloaded from our website. •Contents subject to change without notice. •This document contains copy righted content. • It is prohibited to copy, reproduce, or modify the content of this document without permission.
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