Hioki CT6845 Instruction Manual Download Page 1

AC/DC CURRENT PROBE

Instruction Manual

CT6845

CT6845-05

EN

Warranty

Warranty malfunctions occurring under conditions of normal use in 

conformity with the Instruction Manual and Product Precautionary 

Markings will be repaired free of charge. This warranty is valid for 

a period of 

one (1) year

 from the date of purchase.  Please contact 

the distributor from which you purchased the product for further 

information on warranty provisions.

Introduction

Thank you for purchasing the HIOKI Model CT6845, CT6845-05 AC/

DC Current Probe. To obtain maximum performance from the device, 

please read this manual first, and keep it handy for future reference.

Inspection

When you receive the device, inspect it carefully to ensure that 

no damage occurred during shipping. In particular, check the 

accessories and cables. If damage is evident, or if it fails to operate 

according to the specifications, contact your dealer or Hioki 

representative.

Precautions during Shipment

Handle the device carefully so that it is not damaged due to a 

vibration or shock.

Safety

This device 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.

 

DANGER

Mishandling during use could result in injury or death, 

as well as damage to the device. Be certain that you 

understand the instructions and precautions in the 

manual before use.

 WARNING

With regard to the electricity supply, there are risks of 

electric shock, heat generation, fire, and arc discharge 

due to short circuits. If persons unfamiliar with electricity 

measuring instrument are to use the

instrument, another person familiar with such instruments 

must supervise operations.

Notation

In this manual, the risk seriousness and the hazard levels are 

classified as follows.

 

DANGER

Indicates an imminently hazardous situation 

that will result in death or serious injury to the 

operator.

 

WARNING

Indicates a potentially hazardous situation 

that may result in death or serious injury to the 

operator.

 

CAUTION

Indicates a potentially hazardous situation that 

may result in minor or moderate injury to the 

operator or damage to the device or malfunction.

Safety Symbols

Indicates hazardous high voltage.

Provides warning that negligent safety check or incorrect 

operation presents a significant hazard that could result in 

electrical shock, burn injury, or even death to the user.

Indicates the prohibited action.

Indicates the compulsory action.

Symbols Affixed to the Device

Indicates cautions and hazards. When the symbol is 

printed on the device, refer to a corresponding topic in the 

Instruction Manual.
Indicates that only insulated conductors suited to the

voltage of the conductor under test can be measured.

Symbols for Various Standards

Indicates the Waste Electrical and Electronic Equipment 

Directive (WEEE Directive) in EU member states.

Indicates that the product conforms to regulations set out 

by the EC Directive.

Usage Notes

Follow these precautions to ensure safe operation and to obtain the 

full benefits of the various functions.

 

DANGER

Do not use the device to measure bare conductors. 

Doing so may result in a short-circuit or electrical shock. 

Make measurements at a location on an insulated wire 

that has a suitable amount of insulation for the circuit 

voltage.

The maximum measurable current varies with the 

frequency, and the current that can be measured 

continuously is limited. Operating the device at less than 

this limitation is referred to as derating. Do not measure 

currents in excess of the derating curve. Doing so may 

result in device damage or malfunction, fire, or burns due 

to sensor heating.

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Summary of Contents for CT6845

Page 1: ...vise operations Notation In this manual the risk seriousness and the hazard levels are classified as follows DANGER Indicates an imminently hazardous situation that will result in death or serious injury to the operator WARNING Indicates a potentially hazardous situation that may result in death or serious injury to the operator CAUTION Indicates a potentially hazardous situation that may result i...

Page 2: ...verview The CT6845 and CT6845 05 are openable and closable clamp current sensors that are designed to measure AC and DC currents of up to 500 A at a high level of precision They offer excellent frequency characteristics amplitude and phase as well as excellent temperature characteristics sensitivity and offset and can be used not only for current measurement but also for high precision power measu...

Page 3: ...ure 1 Open the jaw and press the demagnetization DEMAG button Demagnetization DEMAG button 2 Open and close the jaw several times and check if the offset output is stabilized observing the host instrument display 3 Lock the jaw 4 Perform a zero adjustment by turning the zero adjust knob 0 ADJ observing the offset output displayed on the host instrument display Notch No zero adjustment can be perfo...

Page 4: ...the use of a 10 mm diameter wire Effect of external electromagnetic field 150 mA or less value scaled to the input in a DC or 60 Hz magnetic field of 400 A m Effect of magnetic 75 mA or less value scaled to the input after 500 A DC input Effect of common mode voltage 0 05 f s or less 1000 V rms DC to 100 Hz Effect of radiated radio frequency electromagnetic field 6 f s at 10 V m Effect of conducte...

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