Atlas LCR
Passive Component Analyser
Model LCR40

User Guide© Peak Electronic Design Limited 2002/2008
In the interests of development, information in this guide is subject to change without notice - E&OE

electronic design ltd

Atlas LCR User Guide

October 2008 – Rev 4

Want to use it now?
We understand that you want to use your Atlas LCR
right now. The unit is ready to go and you shouldhave little need to refer to this user guide, but please
make sure that you read through pages 4-6!
ContentsPage

Introduction......................................................................... 3
Using your Atlas LCR......................................................... 5
Normal use
Probe compensation
Testing Inductors................................................................. 7
Testing Capacitors............................................................... 8
Testing Resistors ............................................................... 11
Low Resistance and InductanceTaking care of your Atlas LCR ......................................... 12
Battery Replacement
Self Tests
Appendix A – Accessories ................................................ 14
Appendix B – Component Identification .......................... 15
Appendix C – Technical Specifications ............................ 17
Appendix D – Troubleshooting......................................... 18
Appendix E – Warranty Information................................. 19
Appendix F – Disposal Information.................................. 20Page 2

Atlas LCR User GuideOctober 2008 – Rev 4Introduction
The Atlas LCR is an advanced instrument that greatly simplifies the testing ofpassive components.
Traditional LCR bridges are inherently complex and very time consuming touse.
The Atlas LCR does everything automatically, it tells you the component typein addition to component value data.
What's more, the Atlas LCR automatically selects the best signal level andfrequency for the particular component under test.
The software is smart; all internal calculations are performed with floatingpoint maths. This means that precision isn't lost in the complex internal
calculations and all results are displayed in properly formatted and easy-toread engineering units, eg. 23.6pF.

Summary Features:• Automatic component identification.
• Automatic test frequency selection (DC, 1kHz, 15kHz and200kHz).
• Delayed or instant analysis (for hands free operation).
• Auto power-off.
• Probe and test lead compensation.
• Interchangeable probe sets.
• Automatic ranging and scaling.
• 1% basic accuracy for resistors.
• 1.5% basic accuracy for inductors and capacitors.

Page 3Atlas LCR User Guide

October 2008 – Rev 4

Important Notices

WARNING:
This instrument must NEVER be connected to powered
equipment/components or equipment/components withany stored energy (e.g. charged capacitors).
Failure to comply with this warning may result in personal
injury, damage to the equipment under test, damage to theAtlas LCR and invalidation of the manufacturer'swarranty. Non-destructive overload situations are logged
in the non-volatile memory within the Atlas LCR.
“Analysis of discrete, unconnected components isrecommended.” The Atlas LCR is designed to provide accurate andreliable information for the majority of supported componenttypes (inductors, capacitors and resistors) as described in thetechnical specifications. Testing of other component types orcomponent networks may give erroneous and misleadingresults.

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Atlas LCR User Guide

October 2008 – Rev 4

Using your Atlas LCR
Normal Use
The Atlas LCR performs its component analysis before
the results are displayed. Therefore, once the analysis hascompleted, the probes can be disconnected from the component.
Analysis itself only takes a few seconds and you can choose tostart the analysis after a 5 second delay or immediately.
Delayed Analysis: If you press the ontest button the unit will power-up (if it's
not already on!) and then delay for 5
seconds before analysis of yourcomponent starts.

Analysis starts
in 5 seconds...
seconds...

This can be particularly useful if you need time to use both hands to apply thetest probes to the component while the analysis takes place.
Instant Analysis: You can skip the 5second delay by pressing the on-test
button again. The analysis will then start
immediately.

Analysing...

Scrolling through the results: Results are displayed a screen at a time, simply
press the scroll-off button to see each screen when you're ready.
If you reach the last screen of results, pressing scroll-off will take you to thefirst results screen again. Remember, you can take your time; and you don't
need to keep the component connected.
Starting again: The component analysis can be started again at any time bypressing on-test.
Switching off: The unit will automatically switch off after about 20 seconds
following the last keypress. If you wish, you may manually switch off byholding down the scroll-off button for about 1 second.

Page 5Atlas LCR User Guide

October 2008 – Rev 4

Probe Compensation
If you change the probes on your Atlas LCR, it is good practice to run throughthe short compensation procedure. This ensures that the probes' own
inductance, capacitance and resistance is automatically taken into account for
subsequent measurements.
Before you start the compensation procedure, attach asmall length of tinned copper wire between the two testprobes. Now let the leads rest on a non-conductive
surface, try not to touch them during the compensation
procedure.
Now press and hold on-test until thefollowing is displayed:
After a short delay, the unit will prompt
you to short the probes together. As you
have already shorted the probes with thepiece of wire, the Atlas LCR will thenask you to open the probes.

Probe
Compensation
Please shortthe probes
Now openthe probes

Now unclip thered probe from the small length of wire and let theleads rest without touching them.
If this procedure has been successful, the unit will
display “OK” and then switch off.
At this point the parasitic and stray characteristics associated with the test
leads (and indeed the Atlas LCR itself) will be stored in non-volatile memory.
All further tests will have these values subtracted from the measured values,therefore displaying the characteristics of the component alone.

 Please note that probe compensation is particularly important whenanalysing low value inductors, capacitors and resistors.

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Atlas LCR User Guide

October 2008 – Rev 4Testing Inductors
The Atlas LCR is designed to analyse most inductors, coils andchokes.
Inductor test frequency: The test frequency that the Atlas LCR uses will be
automatically selected from 1kHz, 15kHz or 200kHz. The following tableshows the test frequencies used for various inductance ranges:
Inductance Range
Between 0µH and 0.3mH
Between 0.3mH and 4mH
Between 4mH and 10H

Test Frequency Used200kHz
15kHz
1kHz

The inductance range for each test frequency shown in the table above isapproximate. Effects such as DC resistance, hysteresis and Q factor caninfluence the frequency that the Atlas LCR selects for your particularinductor.
Inductance range: Values ranging from about 1µH to 10H can be measured,with a minimum resolution of 0.4µH. The DC resistance of the inductor ismeasured from 0.5Ω to 1kΩ with aminimum resolution of 0.3Ω.
InductanceInductor results: Following analysis,
the inductance is displayed.
Press scroll-off to display thefrequency at which the inductance wasmeasured.
Pressing the scroll-off button again will
display the inductor's DC resistance.

1.507mH
Test frequency
15kHzDC Resistance
67.2 ohms

 Inductance measured for some components can be dependant on the test
frequency used. The effect of frequency on inductance varies depending on
the type of windings and core utilised. Even air cored inductors can show
significant changes of measured inductance at different frequencies.
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Atlas LCR User Guide

October 2008 – Rev 4

Testing Capacitors
The Atlas LCR uses two different methods to analyse
capacitors, AC impedance analysis for low value capacitors(less than about 1µF) and DC charge analysis for larger
capacitors (about 1µF to 10,000µF).

 Capacitors (particularly electrolytics) can store enough charge that
may cause damage to the LCR.
An electrolytic capacitor can even develop it’s own stored charge that
may be sufficient to cause damage to the Atlas LCR even after it has
been temporarily discharged. This is a characteristic known as“Soakage”.
It is vitally important that you ensure the capacitor is fully discharged(ideally for several seconds) to minimise the possibility of damage to theunit.
If you are unsure, measure the voltage across the capacitor using asuitable volt meter before applying the capacitor to the Atlas LCR.
The unit will automatically identify the type of capacitor being tested andapply the most appropriate test method.
The capacitance will always be displayed in the most suitable units. To
convert between the various units refer to the following table:
pF(pico-Farads)
1
1000
1000,000
1000,000,000

nF(nano-Farads)
0.001
11000
1000,000µF(micro-Farads)
0.000001
0.001
11000

Page 8mF(milli-Farads)
0.000000001
0.000001
0.001
1

Atlas LCR User Guide

October 2008 – Rev 4Low Value Capacitors
There is a vast range of low value capacitors available. Types include ceramic,polyester, polystyrene and mylar dielectric capacitors. Generally, low value
capacitors tend to be unpolarised. Minimum capacitance resolution is about
0.1pF.
Capacitor test frequency: The Atlas LCR uses a high purity sine wave signalof 1kHz, 15kHz or 200kHz to analyse these types of capacitors. The
frequency is automatically selected to give the best possible measurement
resolution.
The following table shows the test frequencies used for various capacitance
ranges:Capacitance Range
Between 0pF and 1nF
Between 1nF and 15nF
Between 15nF and 1µF
Above 1µF

Test Frequency Used200kHz
15kHz
1kHz
DCThe capacitance ranges for each test frequency shown in the table above isapproximate. Effects such as leakage, dielectric dissipation and ESR caninfluence the frequency that the Atlas LCR selects for your particular
capacitor.
Capacitor results: Following analysis of the capacitor, the capacitance value
is displayed first. Press the scroll-off button to display the frequency atwhich the capacitance was measured.

Capacitance
48.3pF

Test frequency
200kHzPage 9

Atlas LCR User GuideOctober 2008 – Rev 4

Large Capacitors
Capacitors larger than about 1µF are treated differently,
instead of being tested with an AC signal, they are tested witha DC signal. This is confirmed in the “Test frequency” screen.
Please be patient when testing large value capacitors, it may
take several seconds depending on the capacitance.

Capacitance
106.5uF

Test frequency
DCFor capacitance values of greater than 1000µF, the Atlas LCR will use theunits of mF (milli-Farads). Don’t confuse milli-Farads with micro-Farads,
1mF=1000µF.

 Capacitors (particularly electrolytics) can store enough charge that
may cause damage to the LCR.
An electrolytic capacitor can even develop it’s own stored charge that
may be sufficient to cause damage to the Atlas LCR even after it has
been temporarily discharged. This is a characteristic known as“Soakage”.
It is vitally important that you ensure the capacitor is fully discharged(ideally for several seconds) to minimise the possibility of damage to theunit.
If you are unsure, measure the voltage across the capacitor using asuitable volt meter before applying the capacitor to the Atlas LCR.

 Generally, tantalum capacitors and electrolytic capacitors arepolarised. The Atlas LCR, however, uses a maximum of 1V to test thecapacitor and so polarity of the Atlas LCR test probes is (usually)
unimportant.

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Atlas LCR User Guide

October 2008 – Rev 4

Testing Resistors
Resistance values ranging from 0.5Ω to 2MΩ can bemeasured, with a minimum resolution of about 0.3Ω.
Resistance is measured using a DC signal with a peak voltageof 1V (across an open circuit) and a peak current of about 3mA (through ashort circuit).
Resistor results: Following analysis, theresistance value is displayed.

ResistanceResistance332.2kLow Resistance/InductanceLow value inductors (<5µH) and low value resistors (<10Ω) are treated as a
special case by the Atlas LCR. This is because low value inductors and low
value resistors can exhibit very similar characteristics at the test frequencies
available from the Atlas LCR.
The following message is displayed:

Low Resistanceand InductancePressing the scroll-off button will
display the values of resistance andinductance that the Atlas LCR has
measured.

Resistance
1.3 ohms

The test frequency displayed is thefrequency used for the measurement ofthe inductance.

Inductance
0.6uH
Test frequency
200kHz Please note that probe compensation is particularly important whenanalysing low value inductors, capacitors and resistors.

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Atlas LCR User Guide

October 2008 – Rev 4

Taking care of your Atlas LCR
Battery Replacement
The Atlas LCR requires no special maintenancealthough the battery should be replaced every 12
months to prevent leak damage.

* Low Battery *If this message is displayed, the battery
should be replaced as soon as possible toprevent malfunction or leak damage.

Although the unit may continue to operate following a low battery warning,measurements may be adversely affected.
New batteries can be purchased from many retailers and directly from PeakElectronic Design Ltd or an authorised agent.
Battery types: Suitable battery types include 23A, V23A, GP23A, MN21 or agood quality 12V alkaline equivalent as used in many test instruments andautomotive remote key fobs.
Battery access: To replace the battery, unscrew the three screws to remove therear panel. Remove the old battery and insert a new one, taking care toobserve the correct polarity. Carefully replace the rear panel, do not overtighten the screws.
Peak Safe Battery Disposal Scheme: Please return your old analyser battery
to Peak Electronic Design Ltd for safe and environmentally responsible
disposal.

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October 2008 – Rev 4

Self Tests
Many internal functions are tested each time the unit is powered up. If any ofthese self tests do not meet tightperformance limits, a message will beError 02
displayed similar to the following:
The unit will then switch off.
It is possible that a temporary condition caused the failure and restarting theunit may clear the problem. If the fault persists please contact Peak Electronic
Design Ltd or an authorised agent with details of the error message for furtheradvice.

 Please note that some internal tests cannot be performed if a low battery
warning has been displayed. This means that if there is an internal problem, alow battery condition can prevent the error condition from being displayed. Itis therefore strongly recommended that a low battery is replaced as soon as a
“Low Battery” message is displayed.

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Atlas LCR User GuideOctober 2008 – Rev 4

Appendix A – Accessories
A range of useful additions is available to enhance your Atlas LCR.

Carry Case
A specially designed case with custom made foam compartments and a smart
tough exterior is ideal for protecting your Atlas LCR and probes. There's evenspace for a spare battery.

SMD Tweezer Probes
These tweezers are ideal for testing many types of surface mount device. Thetweezers can cope with package sizes of 0402, 0603, 0805, 1206, 1210 andCase A/B/C/D.
Fitting is easy: the tweezers are terminated in the standard Atlas LCR probeconnectors.

Other Probe Accessories
Many different probe types are available, specially made for your Atlas LCR.
Contact Peak Electronic Design Ltd or an authorised agent for more details.

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Atlas LCR User GuideOctober 2008 – Rev 4

Appendix B - Component Identification
It is important to appreciate that the Atlas LCR can only decide on the identityof the component under test using results of the electrical tests that it performs
on the component.
The Atlas LCR determines the type of component under test according to thefollowing criteria:

Inductor and Resistor Detection
The Atlas LCR will distinguish between components that are largely inductive
or largely resistive according to the values of inductance and resistance that it
has measured. This is illustrated in the following graph.

For example, if the inductance of your component is measured at 100µH andit has a DC resistance of 100Ω, then the Atlas LCR will tell you that you havea resistor. If however the resistance was only 10Ω, then the Atlas LCR willtell you that you have an inductor.
Note that any inductor with a DC resistance of more than 1000Ω will beidentified as a resistor.

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Atlas LCR User GuideOctober 2008 – Rev 4

Capacitor Detection
The Atlas LCR will tell you that you have a capacitor if the following criteria
are satisfied:
1. If the measured DC resistance is higher than 10MΩ, even if themeasured capacitance is very low (such as open probes).
or
2. If the measured DC resistance is between 100kΩ and 10MΩ andthe measured capacitance is larger than 10pF.
or3. If the measured DC resistance is between 1kΩ and 100kΩ and themeasured capacitance is larger than 100nF.

Resistor Detection
Measured characteristics that do not satisfy any of the above criteria (forinductors or capacitors) will be displayed as a resistive element.

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Atlas LCR User Guide

October 2008 – Rev 4

Appendix C – Technical Specifications
Parameter
range
Resistanceresolution
accuracy
range
Capacitanceresolution
accuracyrange
Inductanceresolution
accuracy
Peak test voltage (across O/C)
Peak test current (thru S/C)
1kHz
Test frequency
14.925kHz
accuracy
200kHzSine purity
Operating temperature range
Battery operating voltage
Notes:
1.

2.
3.
4.
5.
6.

Min
TypMax1Ω2MΩ
0.3 Ω0.6Ω
Typically ±1.0% ±1.2Ω
0.5pF
10,000µF
0.2pF
0.5pF
Typically ±1.5% ±1.0pF
1µH
10H
0.4µH
0.8µH
Typically ±1.5% ±1.6µH-1.05V+1.05V-3.25mA+3.25mA
-1.5%
±1%
+1.5%
-1.5%
±1%
+1.5%
-1.5%
±1%
+1.5%
rd
Typically -60dB 3 harmonic
10°C
40°C
8.5V
13VNote

1,2,6

1,2,5

1,2,43

Within 12 months of factory calibration. Please contact us if you
require a full re-calibration and/or certification of traceablecalibration.
Specified at temperatures between 15°C and 30°C.
Subject to acceptable LCD visibility.
For inductances between 100µH and 100mH.
For capacitances between 200pF and 500nF.
For resistances between 10Ω and 1MΩ.

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Atlas LCR User GuideOctober 2008 – Rev 4Appendix D – Troubleshooting
ProblemCapacitance measured whenprobes are open circuit is not
close to zero (±1.0pF).
Resistance and/or inductancemeasured when probes areshort circuit is not close tozero (±1.2Ω, ±1.6µH).

Measured value doesn’t
appear to be correct.

Measured values varyslightly between tests.

Calibration date isapproaching or has past.

Probe has become detached.

Possible Solution
Perform a probe compensation.

Perform a probe compensation.
Ensure probes are well connected to thecomponent under test for the entire durationof the analysis.
Ensure that nothing else is connected withthe component under test. Make sure thatyou are not touching the connections.
The component value may be outside thesupported measurement range.
The component’s design frequency may notcorrespond to the test frequencies used by
the Atlas LCR.
The displayed resolution is higher than themeasurement resolution to avoid rounding
errors. Small variations within the quoted
measurement resolutions are normal.
Don’t worry, the Atlas LCR will carry on
working after the “Calibration Due Date”
has past. The date is simply arecommendation.
The probes simply fit to the test lead usingsquare-pin connectors, carefully push themback together.

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Atlas LCR User Guide

October 2008 – Rev 4

Appendix E – Warranty Information
Peak Satisfaction Guarantee
If for any reason you are not completely satisfied with the Peak Atlas LCR
within 14 days of purchase you may return the unit to your distributor. You
will receive a refund covering the full purchase price if the unit is returned inperfect condition.

Peak Warranty
The warranty is valid for 12 months from date of purchase. This warranty
covers the cost of repair or replacement due to defects in materials and/or
manufacturing faults.
The warranty does not cover malfunction or defects caused by:a) Operation outside the scope of the user guide.
b) Unauthorised access or modification of the unit (except for batteryreplacement).
c) Accidental physical damage or abuse.
The customer’s statutory rights are not affected by any of the above.
All claims must be accompanied by a proof of purchase.

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Atlas LCR User Guide

October 2008 – Rev 4

Appendix F – Disposal Information
WEEE (Waste of Electrical and Electronic Equipment),
Recycling of Electrical and Electronic Products

United Kingdom
In 2006 the European Union introduced regulations (WEEE) for the collection
and recycling of all waste electrical and electronic equipment. It is no longer
permissible to simply throw away electrical and electronic equipment. Instead,these products must enter the recycling process.
Each individual EU member state has implemented the WEEE regulations
into national law in slightly different ways. Please follow your national law
when you want to dispose of any electrical or electronic products.
More details can be obtained from your national WEEE recycling agency.
If in doubt, you may send your Peak Product to us for safe andenvironmentally responsible disposal.

At Peak Electronic Design Ltd we are committed to continual product development and improvement.
The specifications of our products are therefore subject to change without notice.
© 2008 Peak Electronic Design Limited - E&OE
West Road House, West Road, Buxton, Derbyshire, SK17 6HF, UK.
www.peakelec.co.uk Tel. +44 (0) 1298 70012 Fax. +44 (0) 1298 70046

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