PSI50S - Fluke Electronics

i50s

Current Probe

PSi50s

Power Supply

Users Manual

PN 2842332

June 2007

All product names are trademarks of their respective companies.

LIMITED WARRANTY AND LIMITATION OF LIABILITY

Each Fluke product is warranted to be free from defects in material and workmanship

under normal use and service. The warranty period is one year and begins on the date of

shipment. Parts, product repairs, and services are warranted for 90 days. This warranty

extends only to the original buyer or end-user customer of a Fluke authorized reseller,

and does not apply to fuses, disposable batteries, or to any product which, in Fluke's

opinion, has been misused, altered, neglected, contaminated, or damaged by accident or

abnormal conditions of operation or handling. Fluke warrants that software will operate

substantially in accordance with its functional specifications for 90 days and that it has

been properly recorded on non-defective media. Fluke does not warrant that software will

be error free or operate without interruption.

Fluke authorized resellers shall extend this warranty on new and unused products to end-

user customers only but have no authority to extend a greater or different warranty on

behalf of Fluke. Warranty support is available only if product is purchased through a Fluke

authorized sales outlet or Buyer has paid the applicable international price. Fluke re-

serves the right to invoice Buyer for importation costs of repair/replacement parts when

product purchased in one country is submitted for repair in another country.

Fluke's warranty obligation is limited, at Fluke's option, to refund of the purchase price,

free of charge repair, or replacement of a defective product which is returned to a Fluke

authorized service center within the warranty period.

To obtain warranty service, contact your nearest Fluke authorized service center to obtain

return authorization information, then send the product to that service center, with a de-

scription of the difficulty, postage and insurance prepaid (FOB Destination). Fluke as-

sumes no risk for damage in transit. Following warranty repair, the product will be re-

turned to Buyer, transportation prepaid (FOB Destination). If Fluke determines that failure

was caused by neglect, misuse, contamination, alteration, accident, or abnormal condition

of operation or handling, including overvoltage failures caused by use outside the prod-

uct’s specified rating, or normal wear and tear of mechanical components, Fluke will pro-

vide an estimate of repair costs and obtain authorization before commencing the work.

Following repair, the product will be returned to the Buyer transportation prepaid and the

Buyer will be billed for the repair and return transportation charges (FOB Shipping Point).

THIS WARRANTY IS BUYER'S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF

ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED

TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PAR-

TICULAR PURPOSE. FLUKE SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT,

INCIDENTAL, OR CONSEQUENTIAL DAMAGES OR LOSSES, INCLUDING LOSS OF

DATA, ARISING FROM ANY CAUSE OR THEORY.

Since some countries or states do not allow limitation of the term of an implied warranty,

or exclusion or limitation of incidental or consequential damages, the limitations and ex-

clusions of this warranty may not apply to every buyer. If any provision of this Warranty is

held invalid or unenforceable by a court or other decision-maker of competent jurisdiction,

such holding will not affect the validity or enforceability of any other provision.

Fluke Corporation

P.O. Box 9090

Everett, WA 98206-9090

U.S.A.

Fluke Europe B.V.

P.O. Box 1186

5602 BD Eindhoven

The Netherlands

11/99

To register your product online, visit register.fluke.com

Table of Contents

Title Page

Introduction .......................................................................................... 1

Safety Instructions ................................................................................ 2

Symbols ................................................................................................ 3

Probe Features ...................................................................................... 4

Probe Operating Instructions ................................................................ 5

Connections ...................................................................................... 5

Activating the Probe ......................................................................... 6

Current Measurement........................................................................ 7

Range Selection ................................................................................ 7

Auto Zero.......................................................................................... 8

Degauss............................................................................................. 8

Indicators .......................................................................................... 8

Power Supply Operating Instructions ............................................... 9

Fuse Rating ....................................................................................... 10

Maintenance.......................................................................................... 11

Cleaning............................................................................................ 11

Power Supply Fuse Replacement...................................................... 12

Storage.............................................................................................. 12

Specifications........................................................................................ 13

Probe................................................................................................. 13

Electrical Specifications................................................................ 13

Dynamic Characteristics ............................................................... 14

General Data ................................................................................. 14

Power Supply.................................................................................... 15

Electrical....................................................................................... 15

Various.......................................................................................... 16

Safety................................................................................................ 17

Safety Standards ........................................................................... 17

EMC Standards............................................................................. 17

Accessories ........................................................................................... 20

Service .................................................................................................. 20

i50s

Users Manual

i50s Current Probe/

PSi50s Power Supply

Introduction

XWWarning

To avoid electrical shock or possible injury, do not use the

i50s Current Probe with oscilloscopes with floating inputs,

i.e. oscilloscopes not referenced to ground.

The i50s Current Probe (“the Probe”) has been designed for use with

oscilloscopes for accurate, non-intrusive measurement of ac, dc and complex

waveform currents. Using advanced Hall Effect technology the Probe can

accurately measure currents over the frequency range of dc to 50 MHz with a

measuring range up to 50 A peak. The Probe is a general purpose, universal

current Probe which can be used with any oscilloscope.

XWWarning

To avoid electrical shock or possible injury, use the PSi50s

Power Supply only with i50s Current Probes.

The PSi50s Power Supply (the “Power Supply”) is an external power supply

that can simultaneously power two i50s Current Probes. The Power Supply is

supplied from single-phase mains 115 or 230 V ac, with frequencies from 44

to 60 Hz, and provides a symmetrical dc voltage of ±12 V.

i50s

Users Manual

Safety Instructions

Please read this section carefully. It will make you familiar with the most

important safety instructions for handling your product. In this manual, a

Warning identifies conditions and actions that pose hazard(s) to the user. A

Caution identifies conditions and actions that may damage the Probe, Power

Supply, or the test instruments.

WX Warning

The Probe and Power Supply may only be used and

handled by qualified personnel. To avoid electrical shock

or personal injury, follow these precautions:

• Use caution during installation and use of these

products; high voltages and currents may be present

in circuits under test.

• Do not use the Probe or Power Supply if damaged.

Always connect the Probe to display device before it is

installed around the conductor.

• If the Probe or Power Supply is not used in a manner

specified by the manual, the protection provided may

be impaired.

• Use the Power Supply only with i50s Current Probes.

• Do not use the Probe without consulting local and

national safety codes and use of protection equipment

is recommended.

• Do not hold the Probe beyond the tactile barrier (see

Figure 1).

• Before each use, inspect the Probe and Power Supply.

Look for cracks or missing portions of the housing or

output cable insulation. Also look for loose or

weakened components. Pay particular attention to the

insulation surrounding the jaws.

• Use caution when working with voltages above 60 V

dc, 30 V ac rms or 42 V ac peak. Such voltages pose a

shock hazard.

• Do not use the Probe or Power Supply in wet

environments or in locations that hazardous gases

exist.

• Inspect the Power Supply and power cord and ensure

that they are not damaged.

• This product has no serviceable parts, do not open the

Power Supply.

• Check to make sure that the voltage selector switch on

the back panel of the Power Supply is set to the correct

mains input voltage before connecting power.

Current Probe

Symbols

The table below lists the symbols used on the Probe and/or in this manual.

Symbol Description

~ Do not dispose of this product as unsorted municipal

waste. Go to Fluke’s website for recycling information.

W Important Information. See manual.

X Hazardous Voltage. Risk of electric shock.

- Do not apply to or remove from hazardous, live conductors

without taking addition protective measures.

T Double insulation.

I Fuse.

) Conforms to Canadian Standards Association.

P Complies with the relevant European standards.

; Conforms to Australian standards.

CAT I

CAT I equipment is designed to protect against transients

from high-voltage, low-energy sources, such as electronic

circuits or a copy machine.

CAT II

CAT II equipment is designed to protect against transients

from energy-consuming equipment supplied from the fixed

installation, such as televisions, personal computers,

portable tools, and other household appliances.

i50s

Users Manual

Probe Features

exi01f.eps

A BNC Connector G Power Supply Connector

B Degauss Button H Grounding Lead

C Auto Zero Button I Ground Terminal LED

D Range Selection Button J Probe Measuring Head

E Indicator for Overheating K Tactile Barrier

F LED Indicator for Unlocked

Probe Head L Probe Head Opening

Lever

Figure 1. i50s Features

Current Probe

Probe Operating Instructions

The following sections list the Probe operating instructions.

Connections

For these connections, refer to Figures 1 and 2. To connect the Probe, do the

following:

1. Connect the BNC connector, to the oscilloscope input. Ensure that the

input impedance is ≥ 1 MΩ.

2. Connect a ±12 V external power supply to the power supply connector on

the Probe interface. Do not switch on the power supply until the power

supply connections are made using the power supply cable with or without

the adapter provided.

3. When measuring currents with fast voltage variations (high dv/dt) of the

primary current, connect the ground terminal on the Probe to ground.

Probe Head Cable

i50s

(Power Supply)

Other

Power Supply

Power Supply Adapter

Probe Supply Cable

exi02f.eps

Figure 2. Connections

i50s

Users Manual

Activating the Probe

There are two possibilities of supplying power to the Probe:

1. Use the recommended PSi50s Power Supply.

2. Use any suitable power supply and connect the power supply lead using

the adapter provided (see Figure 2).

Note

In order for the Probe to function correctly, the characteristics of the

power supply must be in accordance with the requirements in

“Specifications”.

Before activating the Probe, ensure that the Probe head is locked with no

primary conductor (see Figure 3).

Probe LOCKED

Probe UNLOCKED

exi03f.eps

Figure 3. Locking and Unlocking the Probe

When turning on the Probe :

• All the LEDs will light up for one second.

• Demagnetization is automatically started; the DEGAUSS LED will light

up for approximately six seconds.

• Auto zero is initiated to remove the residual offsets for the two ranges.

Current Probe

Probe Operating Instructions

• High range (100 mV/A) is selected and the corresponding LED lights up.

The Probe is now ready to measure current.

Note

Do not operate the Probe during the activation sequence.

Current Measurement

To measure current, clamp the Probe around the current carrying conductor

and use the slide to ensure that the Probe head is locked (see Figure 3).

A positive output is obtained when the current flows in the direction of the

arrow on the Probe head.

W Caution

The performance of the Probe deteriorates if there is

mechanical stress within the aperture, hindering the

correct closing of the measuring head.

Note

If a 50

load is used, the amplitude of the output signal is halved,

and the specifications are no longer guaranteed.

Range Selection

Two ranges are available by pressing the RANGE button:

1. High range (100 mV/A): oscilloscope 1 MΩ measurement up to 30 A

continuous and 50 A pk (< 10s).

2. Low range (1 V/A): oscilloscope 1 MΩ measurement up to 3 A max.

i50s

Users Manual

Auto Zero

An auto zero of the residual offset is initiated by pressing the AUTO ZERO

button. This should only be performed when the Probe head is locked, with no

primary conductor.

The auto zero can, however, be made as long as the sum of the primary current

and the offset does not exceed:

• 250 mA in the low range

• 500 mA in the high range

If the above values are exceeded, all the LEDs will flash simultaneously for

five seconds and the Probe will switch back to the state preceding the autozero

request. The autozero function will not be performed.

Degauss

Demagnetizing of the Probe head is performed by pressing the DEGAUSS

button. The Probe must remain locked without a primary conductor. During

this operation, the DEGAUSS LED lights up for six seconds.

An auto zero of the residual offset is then carried out on both ranges.

Note

During this sequence, all the other controls are disabled.

Indicators

Several messages can appear on the Probe, alerting an abnormal state:

• UNLOCKED

When the Probe head is not locked, the UNLOCKED LED lights and

flashes

• OVERHEATING

The OVERHEATING LED flashes when a predetermined temperature is

reached; measurement is not possible while in this state. Disconnect the

power supply and wait for the Probe to cool down. Check that the

measured permanent current and the temperature of the primary conductor

do not exceed the maximum permitted values.

Current Probe

Probe Operating Instructions

• Simultaneous flashing of all LEDs

All the LEDs flash simultaneously for five seconds when the auto zero has

not been carried out correctly. Two reasons can cause this phenomenon:

1. The Probe is strongly magnetized

2. The primary current is present during the auto zero function

The Probe reverts to the state preceding the request, i.e., an auto zero has

not been performed but measurement of the current remains possible.

Power Supply Operating Instructions

W Caution

To avoid damaging the Power Supply, use the following

guidelines:

• Do not disconnect the protective ground.

• The mains plug must be connected to a mains voltage

supply with a ground terminal.

To operate the Power Supply (see Figure 4):

1. Select the appropriate mains voltage 230 V or 115 V ac using the voltage

selector switch located on the back panel.

2. Fit the rated fuse appropriate to the selected mains voltage.

3. Connect the Power Supply to the mains supply.

4. Connect the Probe(s) to the RJ45 sockets located on the front panel of the

Power Supply.

5. Operate the ON/OFF switch on the back panel. The front LED will

illuminate to indicate that power is being supplied to the Probe(s).

i50s

Users Manual

exi08f.eps

Number Description Number Description

A Probe Power Supply

Connector E Power Supply

Connector

B Power Indicator F Grounding Terminal

C Power Switch G Input Voltage Selector

Switch

D Fuse Holder

Figure 4. PSi50s Power Supply

Fuse Rating

The Power Supply is protected by a supplied mains fuse located on the back

panel. The fuse ratings depend on the applied voltage, 1 AT for 230 V and 2

AT for 115 V.

Current Probe

Maintenance

W Caution

To prevent damage to the Probe or Power Supply:

Only trained and qualified staff should perform

maintenance on the Probe.

Use only authorized repair parts and all items must be reassembled to their

factory-issued configuration.

Cleaning

W Caution

To prevent damage to the Probe or Power Supply when

cleaning:

• Do not use strong cleaning detergents or solvents (like

trichloroethylene). Clean only using mild soap and water.

After cleaning, remove all residue of soap and water.

• Do not allow liquid to get inside the instrument.

• Do not use sharp tools to clean the end faces of the

Probe.

XW Warning

To avoid electric shock or personal injury, disconnect the

power cord prior to cleaning.

If the Probe requires cleaning, wipe it with a cloth lightly dampened with a

mild rinsing agent.

i50s

Users Manual

Power Supply Fuse Replacement

XW Warning

To avoid electric shock or personal injury, ensure that the

Power Supply is disconnected from the mains supply and

that the Probe(s) is disconnected before changing the fuse

or opening the fuse compartment.

Remove the fuse holder cover located on the rear panel and replace the fuse

with an appropriately rated one, i.e., 1 AT for 230 V ac and 2 AT for 115 V ac.

Re-install the fuse holder cover.

Storage

When the Probe is not going to be used, store it in the carrying case provided.

Current Probe

Specifications

Probe

The following lists the Probe specifications.

Electrical Specifications

Nominal current In ± 30 A dc or A rms

Measuring range I max ±50 A pk (duration <10 sec)

Output voltage Vo

Low range 1 V/A 1 MΩ

High range 100 mV/A 1 MΩ

Overall accuracy (dc to 100 Hz at 25 °C)

± 0.5 % at IN typical

± 1.5 % at IN max

Gain variation (max) ± 0.04 % of rdg/ °C

Step response see Figure 5

Frequency response see Figure 6

Insertion impedance ZI see Figure 7

< 0.1 Ω up to 10 MHz

< 0.4 Ω 10 MHz to 50 MHz

External magnetic field rejection rate 60 dB (ac and dc)

Rejection rate of fast dV/dt at 5 kV/ μs < 15 m AT (during dV/dt)

Output noise level (rms) 1 m AT rms typical

(measured with a filter at 25 MHz)

Output noise level (pk to pk) 9 mAT pp

(measured with a filter at 25 MHz)

i50s

Users Manual

Dynamic Characteristics

Bandwidth DC to 50 MHz (-3 dB)

Frequency derating

(see Figure 8) 10 A at 10 MHz

Rise time, (10 % to 90 %) tr < 7ns

Delay time td < 25 ns

Overshoot < 5 % of reading

General Data

Aperture dimensions 5 x 5 mm (0.2 in x 0.2 in)

Max primary conductor temp. 60 ° C (140 °F)

Dielectric withstand 1350 Vrms / 50 Hz / 1 min

Working Voltage

CAT I 300 Vrms or dc, Pollution Degree 2

CAT II 150 Vrms or dc, Pollution Degree 2

Operating temperature 0 °C to + 40 °C (32 °F to 104 °F)

Storage temperature -10 °C to + 60 °C (14 °F to 140 °F)

Maximum 2000 m (6600 ft)

Maximum relative humidity 80 %, 31 °C (87 °F)

Environment indoor use only

Power supply ± 12 V, ± 0.5 V

Current consumption

at nominal 30 A , 550 mA

during demagnetization 1.3 A (for 6 sec)

Probe dimensions

Length 191.1 mm (7.53 in)

Width 28.9 mm (1.14 in)

Current Probe

Specifications

Height 40.5 mm (1.59 in)

Weight 400 grams (0.88 lbs)

Output cable length 2 m (6.6 ft)

Power Supply

The following lists the specifications of the Power Supply.

Electrical

V ac Input:

Input voltage V ac Bivoltage 115/230 V ac with manual

selector

On 115 V ac : 115 V ac nominal

(103 V ac to 127 V ac)

On 230 V ac : 230 V ac nominal

(207 V ac to 253 V ac)

Frequency range

of ac voltage 44 to 60 Hz

Protection fuse 1 AT / 230 V ac, 2 AT / 115 V ac,

(dim: 5 x 20 mm)

Nominal rated

Input current 200 mA / 230 V ac

400 mA / 115 V ac

Nominal VA rating 46 VA

V DC Outputs:

Type of adjustment Linearly

Output voltages ±12 V dc

Output voltage tolerances +/- 0.5 V dc, I output 0 –1.3 A, U input:

± 10 %

Nominal output current ± 550 mA per output*

Maximum output current ± 1.3 A per output*

i50s

Users Manual

Protection against

short-circuits Rectangular characteristics

* The indicated current values are valid for each output. It is possible to use

the two outputs simultaneously.

Various

Operating temperature -25, +55 °C (-13 °F, +131 °F)

Storage temperature -40, +85 °C (-40 °F, +185 °F)

EMC In compliance with standard EN 55022 A

Weight 2.5 kg (5.51 lb)

Dimensions 90(w) x 115(d) x 200(h)

Connectors Via 2 RJ 45 sockets.

Current Probe

Specifications

Safety

The Probe and Power Supply conform to the latest directives concerning safety

and electromagnetic compatibility.

• European Low Voltage Directives 73/23/EEC and 93/68/EEC

• European EMC Directives 89/336/EEC and 93/68/EEC

Safety Standards

IEC61010-1:2001. General Requirements.

Safety requirements for electrical equipment for measurement, control and

laboratory use.

IEC61010-2-32: 2002. Particular requirements for hand held current clamps

for electrical measurement and test.

IEC61010-31: 2002. Particular requirements for hand held Probe assemblies

for electrical measurement and test.

300 V rms or dc, overvoltage Cat. I, Pollution degree 1

EMC Standards

RF Susceptibility

EN 50082-1: 1992 3V/m Residential, Commercial and Light Industry

RF Emissions

EN 50081-1: 1992 Residential, Commercial and Light Industry

FCC Part 15 Class B

This product is designed to be safe under the following conditions:

• Indoor use

• Altitude up to 2000 m (6600 ft)

• Temperature 0 °C to +40 °C (32 °F to 104 °F)

• Maximum relative humidity 80 % for temperatures up to 31 °C (87 °F )

decreasing linearly to 40 % relative humidity at 50 °C (122 °F)

Use of the Probe on uninsulated conductors is limited to 300 V rms or dc and

frequencies below 1 kHz.

i50s

Users Manual

Reference PR 50

Rise time: 2 ns Time base : 10 ns / div.

exi04f.eps

Figure 5. Step Response

-6.00

-5.00

-4.00

-3.00

-2.00

-1.00

0.00

1.00

0.01 0.10 1.00 10.00 100.00

Frequency [MHz]

[dB]

exi05f.eps

Figure 6. Frequency Response

Current Probe

Specifications

100

1000

0.01 0.001 1.00 10.00 100.00

[mOhms] Probe head grounded

Frequency [MHz]

exi06f.eps

Figure 7. Insertion Impedance

0.000 0.001 0.010 0.100 1.000 10.000 100.000

Ipeak [A]

Frequency [MHz]

exi07f.eps

Figure 8. Frequency Derating

i50s

Users Manual

Accessories

The following items are supplied with the Probe or the Power Supply.

• Carrying Case (Probe)

• Power Supply Cable (Probe)

• Power Supply Adapter (Probe)

• Grounding Lead (Probe)

• Users Manual (Probe)

• Calibration certificate (Probe)

• IEC Power Cord (Power Supply)

• International Adapters (Power Supply)

Service

If your Current Probe is operated and handled properly, it should not require

servicing. However, if you suspect that the Transformer has failed, review this

manual to ensure you are operating it correctly. If it still fails to operate

properly, pack securely using the original packing material (if available) and

forward, postage paid, to the nearest Fluke Service Center. Include a brief

description of the problem. Fluke assumes no responsibility for damage in

transit.

To locate an authorized service center, call Fluke using the phone numbers

listed below:

USA: 1-888-99-FLUKE (1-888-993-5853)

Canada: 1-800-36-FLUKE (1-800-363-5853)

Europe: +31-402-675-200

Japan: +81-3-3434-0181

Singapore: +65-738-5655

Anywhere in the world: +1-425-446-5500

You may visit us on the World Wide Web at http://www.fluke.com.

To register your product, visit http://register.fluke.com.