Agilent Technologies U1583A Manual de usuario

Agilent U1583A Current Clamp

Operating Instructions

The U1583A current clamp is a dual range (40 A and 400 A) clamp-on AC current clamp. This U1583A current

clamp is designed for Agilent handheld digital multimeters (DMM) and Agilent handheld oscilloscopes.

Assistance

For technical assistance, contact your nearest Agilent Sales Ofﬁce or visit the Agilent website at

www.agilent.com/ﬁnd/assist for further information.

Safety Information

Please use the Agilent U1583A current clamp only as speciﬁed in this manual. Otherwise, the protection provided

may be impaired. Refer to the safety information below.

A WARNING identiﬁes conditions and actions that pose hazards to the user. A CAUTION identiﬁes conditions

and actions that may be damaging to the equipment under test.

WARNING

To avoid possible electric shock, personal injury or damage to this instrument, ensure that you use the adapter

safely, and follow these guidelines:

- Do not use the adapter if it is damaged. Inspect the case before you use the adapter. Look for cracks or missing

plastic. Pay particular attention to the insulation surrounding the connectors.

- Inspect the clamp jaw before each use. It shall not have cracks or missing parts, loose or weakened

components. Be sure there is insulation surrounding the jaw.

- Inspect output cable without exposing the metal to ensure insulation.

- Do not operate the adapter around explosive gas, vapor or dust.

- Do not exceed the rated voltage/ current as marked on the adapter.

- This current clamp is designed to be used on INSULATED CONDUCTORS up to 400 A, 600 V CAT III and on BARE

CONDUCTORS of up to 30 VAC rms or 60 VDC. DO NOT USE on BARE CONDUCTORS above 30 VAC rms or

60 VDC. Contact with these voltages will result in electric shock or arc explosion.

- Always keep your hand behind the ﬁnger guard of clamp jaw.

- When servicing the adapter, use only speciﬁed replacement parts.

- Use with caution when working above 30 VAC rms, 42 V peak or 60 VDC. Such voltage poses a shock hazard.

- Avoid working alone.

- Do not operate the adapter if the cover is removed or loosened.

CAUTION

To avoid possible damage to the current clamp or to the equipment under test, follow the guidelines below:

- Do not connect to BNC output or banana plug to any power sources.

- Use the proper terminals, function, and range for your measurements.

AC - Alternating Current Range button in lock mode.

Range ~ 400 A, Output ~ 1 mV/A

Caution, risk of danger (Refer to the user’s

and service guide for details)

DC - Direct Current

400A MAX Maximum allowable current measurement

is 400 A

Ground

CAT III 600V Category III 600V over-voltage protection Double Insulation

Range button in release mode.

Range ~ 40 A, Output ~ 10 mV/A

Caution, risk of electric shock (Refer to the

user’s and service guide for detail)

Do not apply around or remove from

HAZARDOUS LIVE conductors

The CE mark is a registered trademark of the

European Community. This CE mark shows that

the product complies with all the relevant

European Legal Directives

The UL mark is a registered trademark of

Underwriters Laboratories Inc.

Introduction

The U1583A current clamp is designed for Agilent handheld digital multimeters (DMM) and handheld

oscilloscopes. The BNC-to-banana plug is required to connect the current clamp with DMM. For handheld

oscilloscope, it needs to use with BNC connector.

Standard Item Purchased Checklist

The following items are included when you make a purchase:

• U1583A current clamp

• BNC-to-banana plug

• Operating Instructions sheet (this sheet)

General Speciﬁcations

Speciﬁcations Current Clamp

Speciﬁed Current Range 1 A to 400 A ac

Usable Current Range 0.5 A to 400 A

AC crest factor < 3

Bandwidth 10 kHz

Operating Temperature –10 °C to 55 °C (14 °F to 131 °F)

Storage Temperature –20 °C to 70 °C (–4 °F to 158 °F)

Relative Humidity Max 80% RH for temperature up to 35 °C decreasing linearly to 50% RH at 55 °C

Maximum Jaw Opening 32 mm

Maximum conductor size 30 mm or 16 mm x 2

Load impedance > 1 M ohm, < 100 pF

Cable length 1500 +/- 20 mm

Altitude Up to 2000 meters

Safety IEC 61010-1: 2001/EN 61010-1: 2001

IEC 61010-2-032: 2002/EN 61010-2-032: 2002

Canada: CAN/CSA-C22.2 No. 61010-1-04, CAN/CSA-C22.2 No. 61010-2-032-04

USA: ANSI/UL 61010-1: 2004/UL 61010-2-032

Measurement Category CAT III 600 V; Pollution degree 2

EMC Standard

IEC 61326: 2002/EN 61326: 1997+A1: 1998+A2: 2003

Complied to CISPR 11: 1990/EN 55011: 1990 [radiated emission], and equivalents for

Group 1, Class A

Dimensions (HxWxD) 44 mm (H) x 92 mm (W) x 188 mm (L)

Weight 294 grams

Warm-up time Immediately upon power on

Warranty One year

Electrical Accuracy Speciﬁcations

Range Output

Resolution

Accuracy

± (% of reading + digit) at 23 °C ± 5 °C, with relative humidity less than 80% R.H.

Span 48 Hz ~ 65 Hz 40 ~ 48 Hz/

65 Hz ~ 1 kHz

1 kHz ~ 10 kHz

40 A 10 mV/A 0.5 A ~ 40 A 2% + 0.5 A 5% + 0.5 A 10% + 0.5 A

400 A 1 mV/A 0.5 A ~ 40 A 2.5% + 0.5 A 4.5% + 0.5 A 12.5% + 0.5 A

40 A ~ 200 A 2% + 0.5 A 4% + 0.5 A 12% + 0.5 A

200 A ~ 400 A 1.5% + 0.5 A 3.5% + 0.5 A 11.5% + 0.5 A

• The current conductor must be centered within the jaw aperture and no inﬂuence from adjacent currents.

• Connect to load impedance > 1 MW||100 pF.

• Crest factor < 3.

Figure 1: Connection Diagram

Alignment Marks

Put one conductor within the jaws inside the section of the indicated marks as much as possible in order to meet

the accuracy of speciﬁcations. Make sure the clamp is perpendicular to the conductor.

Current Range Selection

To push and release the yellow button for 40 A range and lock the button for 400 A range.

Button Range Output

Release ~ 40 A ~ 10 mV/A

Lock ~ 400 A ~ 1 mV/A

This current clamp is designed to be used on INSULATED CONDUCTORS up to 400 A,

600 V CAT III and on BARE CONDUCTORS of up to 30 VAC rms or 60 VDC. DO NOT USE

on BARE CONDUCTORS above 30 VAC rms or 60 VDC. Contact with these voltages may

result in electric shock or arc explosion.

Operation

AC current can be measured without removing the conductor from the circuit by following the procedures as

shown below:

1. Plug the cable with BNC connector to the BNC with dual banana plugs, and then plug into the V/COM

terminals on the multimeter. For oscilloscope, plug the BNC connector directly to oscilloscope.

2. Set the ACV measurement and range on multimeter you used.

3. Position the jaw to a single conductor and center it accordingly to the alignment marks.

4. Ensure that the arrow marked on the clamp jaw point towards the load for phase measurements or away

from the load (toward the source) for neutral measurements.

5. Observe the AC value on the multimeter or the waveform on the oscilloscope which is proportional to the

current.

6. Select a lower range on the clamp-on adapter and set the corresponding sensitivity (mV/A setting) on the

oscilloscope if required.

Calibration Equipment

The pre-calibration guidelines are shown as follows:

• Be sure you are a qualiﬁed person to perform the calibration

• The environment should be 23 °C ± 2 °C and the relative humidity (RH) shall be < 80%.

The test equipment requirements listed in the table below are required to perform the calibration and performance

veriﬁcation test procedures. Alternative equipment may be used as long as the accuracy is equivalent to or better

than the speciﬁcations listed.

Standard Source Operating Range Accuracy

Required

Recommended

Equipment

AC Current Calibrator 33 mA – 329.99 mA at 10 Hz to 3 kHz

0.33 A – 2.99999 A at 10 Hz to 3 kHz

3 A – 20.5 A at 10 Hz to 3 kHz

≤ ± 0.2%

≤ ± 0.6%

≤ ± 3.0%

Wavetek 9100 or Fluke 5520A or 5101B

or equivalent

Multimeter AC 500.0 mV or 1000.0 mV ≤± 1.5% Agilent U1251A or U1252A or

Agilent-34405A or equivalent

50 Turns Current Coil 0.2 A – 20.5 A ≤± 1.0% Fluke 5500A Coil or Wavetek 9100 Option

200 or equivalent

Current

Clamp BNC-to- Handheld

Current

Clamp Handheld

MARK

MARKMARK

CONDUCTOR

Adjustment Procedures

AC 40 A range

1. Release RANGE button of U1583A current clamp to 40 A mode.

2. Connect the output BNC of U1583A to a BNC-to-dual banana converter plug and proceed to

connect it to the output of the V (HI) and COM (LO) terminals of the multimeter.

3. Set multimeter to AC 500.0 mV or 1000.0 mV.

4. Open the jaws of the current clamp and centrally place it around the 50 turns coil.

5. Set the calibrator output to 50 turns coil. Conﬁgure the calibrator to generate a current 20 A with

60 Hz frequency for adjustment of the current clamp.

6. Remove two Phillips screws on the back of the current clamp and proceed to adjust the VR1 until the

display on multimeter indicates AC 200 mV ± 0.2 mV. Refer to Figure 2 below for the position of

VR1.

Figure 2: U1583A Current Clamp Circuit Board Diagram

AC 400 A range

1. Lock the Range button of U1583A current clamp to 400 A mode.

2. Connect the output BNC of U1583A to a BNC-to-dual banana converter plug and proceed to

connect it to the output of the V (HI) and COM (LO) terminals of the multimeter.

3. Set multimeter to AC 500.0 mV or 1000.0 mV.

4. Open the jaws of the current clamp and centrally place it around the 50 turns coil.

5. Set the calibrator output to 50 turns coil. Conﬁgure the calibrator to generate a current 20 A with

60 Hz frequency for adjustment of the current clamp.

6. Remove two Phillips screws on the back of the current clamp and proceed to adjust the VR2 until the

display on multimeter indicates AC 200 mV ± 0.2 mV. Refer to Figure 2 for the position of VR2.

Remember to place the screws to its original position after performing the calibration

adjustments.

Maintenance

Repair or service not cover in this sheet should be performed only by qualiﬁed personnel.

To avoid electrical shock or damaged to the clamp-on adapter, do not get water inside the

case .

Cleaning

• Periodically wipe the case with a damp cloth and mild detergent. Do not use abrasive or solvents.

• Open the jaws and wipe the metal of jaw with a lightly oiled cloth, and then wipe the oil with dry cloth.

Do not allow rust or corrosion to form on the metal ends of jaw.

Troubleshooting

If the current clamp does not perform properly, follow the steps below to identify the problem:

1. Inspect the mating surface of jaw for cleanliness. If any external material is present, the jaws may

not close properly and affects the result.

2. Verify that the function selection and range on the multimeter or oscilloscope as well as the range

adjusted on current clamp is correct.

Print Date: 05 January 2008

VR1 for AC 40A

adjustment

VR2 for AC 400A

adjustment

U1583-90100

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