Precision Magnetics Analyzer - 3260B

Wide frequency range of 20 Hz to 3 MHz

Fast measurement speed - up to 20

measurements per second

0.1% basic accuracy

Up to 125 A of DC bias current

Telecom measurement functions

Analysis mode with graphical displays

Comprehensive measurement functions

including leakage tests

Straightforward intuitive operation

Print test results

GPIB control with LabVIEW™ driver

Completely characterize components

graphically

At the design stage of component development it is vitally

important to understand how the component performs under

different operating conditions. This might include operation at

diverse frequencies, AC drive levels or DC bias currents.

The 3260B Precision Magnetics Analyzer can plot any of themeasurement functions, such as inductance (L) or impedance(Z), (including secondary term) against frequency, AC drivelevel or DC bias current.Frequency sweeps within the range 20 Hz to 3 MHz can beselected. There is a choice of either linear or logarithmicfrequency displays.

3260B is especially suitable for measuring parameters ontelecom transformers.

The selected parameter and its secondary value arepresented graphically. AC drive levels can be set between 1 mV and 10 V. DC bias current can be set from1 mA to 1 A internally. Using external 3265B 25 A DCBias Units bias currents can be set to a maximum of 125A.

Measure Insertion Loss and Return Loss on

telecom transformers

With the dramatic growth of PCs connected to the telephone system for Internet access has come the requirement to measure Insertion Loss (IL) and Return Loss (RL) of line matching transformers. The 3260B Precision Magnetics Analyzer not only measures IL and RL but the instrument also allows the user to enter the values for terminating resistance or impedance, if complex, and to select a damped network or blocking capacitor if required.

Specification summary

Measurement functions Z, Ø, L, C, Rac, Rdc, Q, D

Turns ratio

Primary and secondary

leakage inductance

Interwinding capacitance

Resonant frequency

Frequency range 20 Hz to 3 MHz

Basic accuracy 0.1%

Modes Analysis (graphing)

Telecom

Multi Frequency

Sequence

DC bias current 1 mA to 1 A (internal)

To 125 A (using five 3265B

DC Bias Units)

Interface GPIB

Measurement speed Up to 20 measurements/sec

Printed output of test results

Using the parallel Centronics interface the user can directly print test results including graphs for further analysis and archiving. In addition, via the GPIB interface, the instrument can be controlled from a PC and results can be read back for analysis

and storage. LabVIEW™ drivers are available on request or via our website,

Bin sort

The bin sort function allows component manufacturers to sort components in up to ten bins. Sorting is carried out either by absolute values or by percentage of values.

Component tests with up to 125 A DC bias

current

To evaluate components at high currents up to 125 A the optional 3265B DC Bias Unit is used. 25 A of DC bias current can be set in steps of 0.025 A with one unit whilst up to five units can be used in parallel to give up to 125 A DC bias current. The standard 3260B Precision Magnetics Analyzer can provide an internal DC bias from 1

mA to 1 A.

The 3265B has a number of safety and protection features including a safety interlock system to protect the user against back EMFs. It is also fully protected against over

temperature, excess voltage drop and sense lead failure.

3265B DC Bias Unit can deliver up to 25 A of DC bias current in steps of 0.025 A

SMD inductor tests up to 50 A

With the addition of the 1009 DC Bias Fixture DC bias currents up to 50 A can be applied to an SMD inductor during component test in order to evaluate the devices thoroughly at the operational bias currents.

The fixture operates with one or two 3265B Wayne Kerr DC bias units and a 3260B Precision Magnetics AnalyzerFour rear panel mounted BNC connectors and two

captive high current cables ensure simplicity and ease of use with the 3265B.

Interchangeable component test carriers ensure that the 1009 DC Bias Fixture may be used with a wide variety of devices. If a device package is not supported by one of

the standard carriers then a custom carrier design service is available. Stable component fixturing ensures high accuracy and repeatable measurements. Enclosed fixtures, with safety interlocks, minimises risk to operators

1009 DC Bias Fixture enables currents up to 50 A to be applied to an SMD inductor

Inductance plotted against frequency

Illustration of Telecomms mode

Phase plotted against frequency

Technical specifications

Precision Magnetics Analyzer - 3260B

Operation modes

Impedance mode

Inductance (L), Impedance (Z), DC Resistance (Rdc) and Capacitance (C). Series or parallel equivalent circuit Loss term: Quality factor (Q), Dissipation factor (D), AC Resistance (Rac) and Phase Angle (Ø) Analogue scale (bar graph) with nominal, absolute and percentage modes

Handler mode

Enables existing 4-wire scanners to be used

Functions as for impedance mode plus Turns Ratio

Transformer mode

Rdc of each winding, Primary or Secondary Leakage Inductance and Q, Turns Ratio, Interwinding Capacitance Insulation between windings from either winding to

screen/core is available as an option.

Telecom mode

Provides derivation of Insertion Loss (IL) and Return Loss (RL) for line matching transformers operating in the telephone speech band (100 Hz to 20 kHz). Values of line

impedance (Zo) and termination (Rt) are user selectable. Optional simulated damping network and series blocking capacitor are user configurable.

Analysis mode

Measurement parameters and test conditions set using measurement mode.

Graphical sweep versus frequency, AC drive level or DC bias current with selection of start, stop, step size, units and linear/log.

Multi-frequency mode

Measurement parameters and test conditions set using measurement mode. Up to eight frequencies with absolute or percentage limits on major term PASS/FAIL indications.

Test conditions

Low level AC drive

For measurement of L + Q, Ls + Rs, C, Z, Turns Ratio and Leakage Inductance

Frequency range

20 Hz to 3 MHz interwinding capacitance, minimum frequency 100 Hz

Steps

Increments of 1% or better across range 1800 frequencies approx. Accuracy of selected frequency ±0.01 %

Drive level

Source impedance 50 Ω

1 mV to 10 V rms into open circuit

50 μA to 200 mA rms into short circuit

Automatic Level Control (ALC) maintains level applied to

DUT at ±2%, ±1 mV of set voltage or ± 2% ±0.1 mA of setcurrent.

DC bias current

1 mA to 1 A DC is available from internal, fast settling bias supply over full frequency range Voltage compliance 20 V minimum

Safety interlock minimises operator exposure to high currents.

DC resistance

Low test level of 100 mV minimises heating of the device under test.

Short circuit current 10 mA

Insulation (option)

Test voltages of 100, 200 or 500 V DC, user selectable

Results can be displayed as a current or resistance value

Voltage accuracy ±3%

For user safety, short circuit current is limited to <2 mA

Bin Handler mode (option)

Sort to 1 of 10 bins using absolute or percentage limits.

Separate Pass/Fail output.

Up to 100 bin limit set-ups stored in non-volatile memory.

TTL interface to external bin handler via 25 way D type connector.

Telecom mode (option)

Drive level -28 to 16 dBm

Test time varies with level

Zo/Rt 50 to 2000 Ω

Test time < 1.5 s typical

Measurement speeds

For impedance, turns ratio, DC resistance and insulation 4 speeds selectable: MAXimum, FAST, MEDium and SLOW MAX (20 measurements per second)

for component sorting under GPIB remote control.

FAST Approximately 10 measurements per second.

SLOW Approximately 1 per second for increased stability and accuracy

Measurement ranges

R 0.01 mΩ to >2 GΩ* L 0.1 nH to >1000 H* C 5 fF to >1 F*

Accuracy

Inductance/Rac/Z/Cp ±0.1 %** Q ±0.1% (Q+1/Q)** D ±0.001 (1+D2)**

Turns ratio ±0.1 %** Rdc ±0.5 %

Insulation ±5 % (500 V test) Insertion loss ±0.1 dB Return loss ±1 dB

Basic accuracy varies with frequency, Zo, Rt, range and level

* Varies with measurement speed

** Varies with frequency and option chosen

General data

Input specification

Power supply 230V AC ±10% or 115V AC ±10% (selectable)

50 to 400 Hz 400 VA maximum consumption

Display

High contrast monochrome LCD 320 x 240 dot with back lighting.

Visible area 115 x 86mm. Viewing angle 45°

Measurement connections

8 front panel BNC sockets 2- or 4-wire (Kelvin) measurements with screen

at ground potential

Equivalent circuit symbols on screen.

Separate terminals for primary and secondary connections.

LEDs indicate active terminals.

Remote control (option)

Conforms with GPIB IEEE488.2 and SCPI 1992.0

Printer output

Centronics parallel printer port

Ambient conditions

Operating temperature range 0°C to 40°C.

Full accuracy 15°C to 35°C

Safety

Complies with the requirements of EN61010-1

EMC

Complies with EN50081-1, EN50082-1 generic emissions and

immunity standards by meeting with the requirements of

EN55022, IEC801.2, IEC801.3 and IEC801.4

Mechanical (approx. overall)

Height 150 mm (6“)

Width 440 mm (17 3/8“)

Depth 520 mm (20 1/2“)

Weight 11 kg (24 lb 4oz.)

Order codes and options

Description Order code

3260B Precision Magnetics Analyzer1J3260B

Supplied with user manual, power cable,

spare fuses, two transfer standard capacitors

and safety interlock jack

Options

/N Insulation resistance test (500 V)

/G Analysis function (graphs)

/T LF Telecom function

/D Bin handler

Auxiliary unit

25A DC bias unit 3265B (1 MHz)1J3265B

Supplied with user manual, power cable,

spare fuses, 4 x BNC to BNC links, daisy chain

link, rack mounting ears (unit needs rear support)

and bus bars.

25A DC bias unit 3265BQ (3 MHz)1J3265BQ

Supplied with user manual, power cable,

spare fuses, 4 x BNC to BNC links, daisy chain

link, rack mounting ears (unit needs rear support)

and bus bars.

Accessories

Description Order code

1009 DC Bias Fixture1J1009

Rack mounting kit. 3U x full width1EXA20230

Kelvin clips (fine jaws).1EVA40100

(2 sets recommended for transformer tests)

Kelvin clips (large jaws)1EVA40180

BNC to 4-terminal component fixture.1EV1006

Recommended above 500 kHz

4-terminal lead set1EV1505

(SMD Tweezers1EVA40120

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