Related Manuals for Hioki CM4371
Summary of Contents for Hioki CM4371
- Page 1 CM4371 CM4372 Instruction Manual CM4373 CM4374 AC/DC CLAMP METER Aug. 2017 Revised edition 3 17-08H CM4371A961-03 1.800.544.2843 www.calcert.com sales@calcert.com...
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Page 2: Table Of Contents
Contents Introduction ........................1 Options (sold separately) ..................3 Safety Notes .......................4 Usage Notes .......................8 Part Names .......................11 Insert/Replace Batteries ..................12 Inspection Before Measurement ................14 Current Measurement ....................15 Manual Hold / Auto Hold ..................16 Switching ranges .....................19 Filter Function ......................20 MAX/MIN/AVG/PEAK ....................21 Simultaneous display of DC current/voltage peak values ........22 Backlight / Auto Power Save (APS) ................24 Rush current (INRUSH) ....................25... - Page 3 Contents Other Measurement Functions ................26 Voltage ......................26 Continuity Check ....................27 Resistance .......................27 Diode ........................27 Capacitance .....................28 Temperature ....................28 Electric Charge Detection ................29 Simultaneous display of DC current and DC voltage ........29 DC power ......................29 ® Bluetooth Communications (only for CM4372, CM4374) ..........30 Power-on Option Table ....................35 Repairs, Inspections, and Cleaning ...............37 ......................40...
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Page 4: Introduction
Introduction Introduction Thank you for purchasing the Hioki CM4371, CM4372, CM4373, CM4374 AC/DC Clamp Meter. To obtain maximum performance from the instrument, please read this This instrument is a clamp meter that can perform true RMS measurement of current simply by clamping it around a circuit. In addition to current, it provides voltage... - Page 5 Trademark ® Bluetooth is a registered trademark of Bluetooth SIG, Inc.(USA). The trademark is used by HIOKI E.E. CORPORATION under license. Android and Google Play are registered trademarks of Google, Inc. IOS is a registered trademark of Cisco in the U.S. and other countries.
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Page 6: 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 L4937 Magnetic Adapter Set L4931 Extension Cable Set L4932 Test Pin Set... -
Page 7: Safety Notes
Safety Notes Safety Notes This instrument is designed to conform to IEC 61010 Safety Standards, and has been thoroughly tested for safety prior to shipment. However, using the instrument in a way not described in this manual may negate the provided safety features. Before using the instrument, be certain to carefully read the following safety notes. - Page 8 Safety Notes WARNING Protective gear This instrument is measured on a live line. To prevent electric shock, use insulated protective wear such as rubber gloves and rubber boots designed for electrical work as well as a safety helmet as required by occupational health and safety regulations.
- Page 9 Safety Notes Indicates cautions and hazards. When the symbol is printed on the Indicates DC (Direct Current) or AC instrument, refer to a corresponding (Alternating Current). topic in the Instruction Manual. Indicates that dangerous voltage may Indicates DC (Direct Current). be present at this terminal.
- Page 10 Safety Notes Measurement categories This instrument conforms to the safety requirements for CAT III 1000 V, CAT IV 600 V measuring instruments. Distribution panel Service entrance Internal wiring Service drop CAT II CAT III CAT IV T Outlet Power meter Fixed installation 1.800.544.2843 www.calcert.com...
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Page 11: Usage Notes
Usage Notes Usage Notes functions. DANGER measurement range indicated by the ratings and so may damage the instrument or cause it to become hot, resulting in bodily injury. use the cable. 1.800.544.2843 www.calcert.com sales@calcert.com... - Page 12 Usage Notes WARNING Do not allow the instrument to get wet, and do not take measurements with wet hands. This may cause an electric shock. To prevent electric shock, when measuring the voltage of a power line use a Conforms to safety standards IEC61010 or EN61010 Of measurement category III or IV Its rated voltage is higher than the voltage to be measured The optional test leads for this instrument conform to the safety standard...
- Page 13 Usage Notes Current measurement precautions Do not touch. Do not clamp around two wires. Do not input Do not pinch wire between jaws. currents. (Red display) 1.800.544.2843 www.calcert.com sales@calcert.com...
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Page 14: Part Names
Part Names Part Names Front Rear (clamp sensor) Barrier Rotary switch Operation grip HOLD SHIFT (Selects function LCD Display indicated in blue Battery cover lettering.) Operation keys Measurement terminals (p. 8) (CM4372) 1.800.544.2843 www.calcert.com sales@calcert.com... -
Page 15: Insert/Replace Batteries
Insert/Replace Batteries Insert/Replace Batteries WARNING To prevent electric shock, disconnect test leads before inserting or replacing the batteries. Handle and dispose of batteries in accordance with local regulations. To prevent instrument damage or electric shock, use only the screw for securing the battery cover in place that are originally installed. - Page 16 Insert/Replace Batteries Insert/Replace Batteries Battery Description indicator Fully charged. As the battery charge diminishes, black charge bars disappear, one by one, from the left of the battery indicator. The battery voltage is low. Replace the batteries as soon as possible. (Blinks) The battery is exhausted.
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Page 17: Inspection Before Measurement
Inspection Before Measurement Inspection Before Measurement Verify that the instrument operates normally to ensure that no damage occured during storage Check item The battery cover is closed and its screw There is no damage to the test lead has been securely tightened. insulation, and neither the white sheathing nor metal conductor inside the wire are exposed. -
Page 18: Current Measurement
3P4W (3-phase, 4-wire) circuit breaker (AC current measurement) Press for 1 sec. Perform zero adjustment → Frequency detection range of AC current CM4371, CM4372: 20.00 A range 4.00 A or more 600.0 A range 20.0 A or more CM4373, CM4374: 600.0 A range... -
Page 19: Manual Hold / Auto Hold
Manual Hold / Auto Hold Manual Hold / Auto Hold MANUAL HOLD AUTO HOLD blinks. → Press for 1 sec. To measured target (Measured value stabilizes.) Pressing the HOLD key again cancels the measured value hold function. Disconnect Measured value automatically retains. Pressing the HOLD key for 1 second cancels... - Page 20 Manual Hold / Auto Hold Auto hold conditions When the measured value exceeds the threshold value described in the table in the next page. (voltage, current) When the measured value is less than the threshold value described in the table in the next page. (resistance, continuity, diode) described in the table in the next page.
- Page 21 Manual Hold / Auto Hold Measurement function Fluctuation range Threshold value AC current 20.00 A range: within 100 counts 20.00 A range: 100 counts DC current 600.0 A range: within 120 counts 600.0 A range: 120 counts AC+DC current 2000 A range: within 40 counts 2000 A range: 40 counts AC voltage 6.000 V/ 60.00 V/ 600.0 V range:...
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Page 22: Switching Ranges
Switching ranges e.g. 1: Current measurement with the CM4373, CM4374 AUTO range MANUAL 600.0 A range MANUAL 2000 A range e.g. 2: Current measurement with the CM4371, CM4372 AUTO range MANUAL 20.00 A range MANUAL 600.0 A range 1.800.544.2843 www.calcert.com... -
Page 23: Filter Function
Filter Function Filter Function FILTER OFF FILTER ON Measured value with reduced noise Measured value including noise Press for 1 sec. Frequency characteristics when (600.0 A AC range, 100 A input) measurement of power supply frequencies in excess of 100 Hz, for example on an FILTER OFF FILTER ON Passband 100 [Hz] aircraft or ship. -
Page 24: Max/Min/Avg/Peak
MAX/MIN/AVG/PEAK MAX/MIN/AVG/PEAK AUTO Can not be used at (AUTO AC/DC) (AC A) (DC A) (AC+DC A) AUTO AC/DC. Press for 1 sec. PEAK MAX Waveform The instrument Measured value performs true RMS (RMS value) measurement. AVG: The average value of all the measured values PEAK MIN Display refresh interval... -
Page 25: Simultaneous Display Of Dc Current/Voltage Peak Values
Simultaneous display of DC current/voltage peak values Simultaneous display of DC current/voltage peak values Engine starts (p. 29) (PEAK occurrence) Black Press for 1 sec. → PEAK display ON Trigger level: ±60 A Trigger level: ±200 A The input current that equals to the trigger level or less does not trigger any peak measurement. - Page 26 Simultaneous display of DC current/voltage peak values PEAK MAX Press for 1 sec. PEAK MIN While measuring currents, the instrument, which measures peak values of current and PEAK MAX DC voltage voltage alternately, does not display any voltage values even when a voltage is applied. PEAK MIN To measure peak values of each of current and Trigger level...
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Page 27: Backlight / Auto Power Save (Aps)
Backlight / Auto Power Save (APS) Backlight / Auto Power Save (APS) (Always on) Backlight Auto Power Save (APS) Cancelation method: p. 35 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 28: Rush Current (Inrush)
Rush current (INRUSH) Rush current (INRUSH) MOTOR OFF Press for 1 sec. MOTOR ON Press for 1 sec. Rush current occurrence Clamp the wire. RMS value (INRUSH) Example screen: 100 A RMS value (INRUSH) AC current DC current Trigger level: ±10 A Interval during which rush Interval during which rush current occurs... -
Page 29: Other Measurement Functions
Other Measurement Functions Other Measurement Functions Voltage AUTO (AUTO AC/DC) Black (AC V) (DC V) (AC+DC V) Do not touch. high voltage. DC voltage polarity detection function (p. 35) If the measured value is negative, the buzzer will (Red display) 1.800.544.2843 www.calcert.com sales@calcert.com... -
Page 30: Continuity Check
Other Measurement Functions Continuity Check Resistance Diode Press for 1 sec. Press for 1 sec. Black Black Black (Red display) 1.800.544.2843 www.calcert.com sales@calcert.com... -
Page 31: Capacitance
Other Measurement Functions Capacitance Temperature Black DT4910 : when DT4910 Black is broken. To change the temperature display unit: p. 36 1.800.544.2843 www.calcert.com sales@calcert.com... -
Page 32: Electric Charge Detection
Other Measurement Functions Detection e.g.: Checking a car battery system maintenance Black Press for 1 sec. (Red display) 1.800.544.2843 www.calcert.com sales@calcert.com... -
Page 33: Bluetooth ® Communications (Only For Cm4372, Cm4374)
® Bluetooth Communications (only for CM4372, CM4374) ® Bluetooth Communications (only for CM4372, CM4374) ® ® The CM4372 and CM4374 are clamp-style meters with Bluetooth (Bluetooth Low Energy) support. When ® the Bluetooth function is enabled, you can review measurement data and create measurement reports on mobile devices (iPhone, iPad, iPad Mini, iPad Pro, iPod Touch, and Android™... - Page 34 For more information about how to register an account, contact the store at which you purchased your device. Because the CM4372 and CM4374 emit radio waves, use in a country or region where they have not The CM4372 and CM4374 availability is limited to certain countries. For more information, contact your authorized Hioki distributor. ® Bluetooth communications range varies greatly with distance from obstructions (walls, metal obstruction, strength.
- Page 35 ® Bluetooth Communications (only for CM4372, CM4374) ® Turning on the Bluetooth function ® ® Bluetooth function OFF Bluetooth function ON Press for 1 sec. is connected to a mobile device. 1.800.544.2843 www.calcert.com sales@calcert.com...
- Page 36 ® Bluetooth Communications (only for CM4372, CM4374) Pairing the app with the CM4372 or CM4374 Instrument Settings screen will be displayed. While the mobile device is displaying the Instrument Settings screen, simply move it close to a CM4372 or CM4374 to automatically pair it with the instrument (the app can be paired with up to 8 instruments). Allow about 5 to 30 seconds for the instrument to pair with the app after being turned on.
- Page 37 Bluetooth® Communications (only for CM4372, CM4374) ® Making measurements with the Bluetooth function Select the General Measurement, Logging (Recording), or Waveform Graph function on Home screen. For more information about each function, see the Help function in the GENNECT Cross. General Measurement Logging (Recording) Waveform Graph...
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Page 38: Power-On Option Table
Power-on Option Table Power-on Option Table Turn on the power while pressing the operation key. (Turn the rotary switch from OFF.) Factory Setting Setting Operating instruction setting retained? Canceling the auto power save (APS) function (Set each time) DC current and DC voltage polarity detection function (ON/OFF) Displaying all indicators... - Page 39 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. 1.800.544.2843 www.calcert.com sales@calcert.com...
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Page 40: Repairs, Inspections, And Cleaning
Repairs, Inspections, and Cleaning Repairs, Inspections, and Cleaning Cleaning To clean the instrument, wipe it gently with a soft cloth moistened with water or mild detergent. Troubleshooting Symptom The instrument is indicating Is the measured current value too small for the instrument’s measurement an abnormal measured range? value for current. - Page 41 Repairs, Inspections, and Cleaning Symptom When readings from the The instrument cannot accurately measure waveforms that contain a instrument are compared component that falls outside the frequency characteristics range. with those of another Since the instrument performs true RMS measurement, it can accurately clamp-on current meter, the measure distorted waveforms.
- Page 42 Program ROM error Err 002 When the error appears in the display, it is Adjustment data necessary to repair the instrument. ADC error Please contact your authorized Hioki Err 005 Hardware malfunction distributor or reseller. ® Bluetooth error Err 008...
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Page 49: Accuracy Table
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