Download from the sales partner portal or fluke web site

A40B AC Current Shunts
Improvements for traceable current measurement
• DC to 100 k Hz
• 1 mA to 100 A
A40B Product Sales Training Presentation
Our objectives today
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Review the uses of precision current shunts
Overview of A40B Shunts
Applications of precision shunts in metrology
Customers & sales opportunities
Competition
A40B shunt calibration
Ordering information
Sales tools
Demo kit
A40B Product Sales Training - Jan '09
2
Traceably measuring dc current is
SIMPLE!
•
•
•
•
•
Connect a resistor of known value
Allow source and resistor to settle
Measure the voltage developed
Calculate & record the current
Estimate uncertainties
• Voltmeter specification
(characterization)
• Resistor value, stability & power
coefficient
• Contribution for noise
• Move on to the next
measurement
A40B Product Sales Training - Jan '09
I=V/R
3
Traceably measuring ac current is....
• Connect a resistor (calibrated
for ac/dc difference)
• Measure +dc current with shunt
• Repeat for –dc current
• Average the two dc
measurements
• Measure ac current
• Apply corrections
• Determine total error
• Consider uncertainties
• Calculate & record the current
• Move on to the next
measurement & repeat
A40B Product Sales Training - Jan '09
SIMPLE
I=calculated by comparing the
average of (+Idc & -Idc) to Iac
4
Fluke’s solution – the original A40 shunts
the long time industry standard solution....
Since 1963 we have
compared AC to DC using
thermal devices – a time
consuming & complex task
A40B Product Sales Training - Jan '09
5
Can we make it easier?
• Products like Fluke 792A
and 5790A remove some
AC-DC measurement
difficulties
• BUT.... we still need to
perform AC-DC
comparison
• What is needed to make
AC current measurements
as simply as DC?
A better transducer…
A40B Product Sales Training - Jan '09
6
Introducing the better transducer …
A40B Precision Current Shunts
14 shunts
ranging from
1 mA to 100 A
DC to 100 kHz
Output @
nominal
current of 0.8V
A40B Product Sales Training - Jan '09
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Why the A40B Shunts are better •
Specified to measure both DC and AC current
A40s and A40As were AC only
•
Accurate enough to measure current directly
rather than use AC/DC transfer techniques
Simplifies calibration to 1/3 of the complexity of the
existing methodology
•
Low inductance and low power coefficients
permit
Improved measurement speed (less self heating)
Little phase shift for calibration of power quality
instruments (like the Fluke 6100A)
•
Extends precision currents shunts beyond 20A,
to both a 50A and a 100A level
A40B Product Sales Training - Jan '09
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Radial shunt design –
(100 mA & higher shunts)
A design used
and accepted by
many NMIs
A40B Product Sales Training - Jan '09
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A40B Shunt output voltage – 0.8 Volts
Easy to measure, and are
compatible with
• Precision DMMs (Fluke 8508A)
• Sampling DMMs (Agilent 3458)
• AC Measurement Standards
(Fluke 5790A)
• AC/DC Transfer Standards
(Fluke 792A)
• Traditional Thermal Voltage
Converters (TVCs and
MJTVCs)
A40B Product Sales Training - Jan '09
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The A40B 1 mA Shunt –
Designed to minimize loading effects
• 1 mA shunt is 800  for a 0.8V output
• Technical Issues for 800 ohm shunts
• Shunt resistance interacts with DMM
input impedance
• 10 M  reduces resistance by 80 ppm
• Connecting cables add capacitance &
inductance – effecting bandwidth & phase
shift
• 90 pF reduces resistance by 430 ppm @
100 kHz
• So the A40B 1 mA shunt has a built
in battery operated buffer amplifier to
minimize these effects
• Reduce output resistance from 800 ohms
to 8 milliohms
• Rechargeable battery operation
eliminates power mains related errors
A40B Product Sales Training - Jan '09
11
Key A40B technical data (1)
Shunt resistance values
0.008 ohms (100A) to
800 ohms (1mA)
Direct Measurement Specifications
Shunt Current
DC
1kHz
100kHz
1 mA
±20 ppm
±55 ppm
±150 ppm
10 mA to
200mA
±20 ppm
±23 ppm to
±26 ppm
±23 ppm to
±26 ppm
500mA to 20 A
±21 ppm to
±25 ppm
±27 ppm to
±43 ppm
±28 ppm to
±113 ppm
50 A & 100A
±32 ppm to
±35 ppm
±55 ppm to
±65 ppm
±144 ppm to
±174 ppm
A40B Product Sales Training - Jan '09
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Key A40B technical data (2)
Resistance value
< ± 250 ppm from nominal
Resistance value calibration
uncertainty
< ± 8 to 10 ppm (1 mA to 5 A)
< ± 15 to 28 ppm (10 A to 100 A)
Resistance value stability
< 18 ppm,
typically < 5 ppm/year
Temperature coefficient
< 2.5 to 4.5 ppm / ºC
Power coefficient
≤ 1 to 4 ppm for 1 mA to 200 mA
shunts, increasing to 105 ppm for 100A
shunt
Phase Accuracy
1mA to 200 mA shunts
<0.001º @1kHz, <0.06º @100 kHz
Phase Accuracy
20 A to 100 A shunts
<0.013º @1kHz, <1.25º @100 kHz
A40B Product Sales Training - Jan '09
13
Metrology Shunt Applications
Calibration of precision sources
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•
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•
•
Calibrators
Power quality sources
Power sources
Current sources
Transconductance amplifiers
Travelling artifacts between NMIs
……. and so on ……
Plus used in Digital
Sampling Wattmeter
applications
A40B Product Sales Training - Jan '09
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Calibrate Fluke 5520A calibrator
current with A40B & 8508A DMM
• Enter the shunt calibrated resistance
value into 8508A memory
• Connect 5520A → shunt → DVM
• 5520A to operate & the current is
displayed on dmm, scaled to amps
• Record; move on to next
measurement
• Excellent Test Uncertainty Ratio
(TUR) for AC and DC current
• (Fluke plans to update our
documented procedures in 2009)
A40B Product Sales Training - Jan '09
15
Calibrate Fluke 5720A calibrator
current with A40B & Fluke 5790A
DC current
• A40B + 8508A will provide
an excellent TUR for all
currents
• Alternatively, Fluke 742A
can be used as DC resistors
up to 2 A for a more
accurate calibration
AC current
• Use A40B + 5790A (manual
resistor value correction)
• TUR better than AC-DC
transfer using older A40 &
A40A shunts (≥4:1)
A40B Product Sales Training - Jan '09
Can use A40B shunts
for both AC & DC tests
Use a DMM as a DC detector,
5790A as an AC detector
16
Calibrate power quality sources
A40B type shunts are best for this application
•
•
•
•
Low inductance
Low power coefficient
High bandwidth
6100 specs and TUR
requirements require a
spec < 0.05 mº at 50Hz
from current shunts for
calibration
• A40B phase displacement
not discernable @ 50 Hz;
<< 1 º @ 1500 Hz
A40B Product Sales Training - Jan '09
17
Fluke’s 6100A
Calibration/Verification System
Fluke’s Digital
Sampling
Wattmeter
• Note the green AC current
shunts, these are A40B
prototypes
• It would not have been possible
to achieve the calibration
uncertainties required for phase
angle and non-sinusoidal signals
without a superb AC shunt
A40B Product Sales Training - Jan '09
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Calibrate transconductance amplifiers
• Guildline 7620:
• 200 A to 20 A, DC to
100 kHz;
TUR > 4:1
• Clarke-Hess 8100:
• 200 mA to 100 A; DC to
100 kHz; TUR > 4:1
• Ballantine 1620A
• 1 mA to 100 A, DC to 10
kHz; TUR > 4:1
A40B Product Sales Training - Jan '09
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The Bottom Line:
Fluke A40Bs will do the job!
A40B Product Sales Training - Jan '09
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Who are the users?
• National Metrology Institutes (NIST has a new set of A40Bs)
• Defense Labs (the US Air Force has purchased 118 sets of
A40B shunts from Fluke)
• Industry labs who support their own calibrators/sources
• Any and all commercial labs who calibrate calibrators or power
standards or current sources
• Any A40 or A40A user wishing to upgrade capabilities (1000s
of opportunities!)
• Add 50A and 100A shunts to their existing shunts
• Every early A40 replaced with A40Bs will cut complexity by 2/3
A40B Product Sales Training - Jan '09
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We offer users an improved
measurement opportunity
Extended current measurement capabilities
•
DC to 100 kHz
•
1mA to 100A
Simplify traceable current metrology tasks
•
Directly measure current rather than AC/DC transfer
•
Measure using DMMs in most applications
Improved Performance
•
Better AC/DC difference (improved flatness)
•
Low Inductance (negligible phase shift)
•
Low Power Coefficient (fast settling time, effective for non sine wave
measurements)
A40B Product Sales Training - Jan '09
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A40B Competitors
• Guildline’s Elusive New
Precision AC Shunt series
• Custom Shunts supplied by
various NMIs
• Sweden’s SP Shunts
• Norway’s JV Shunts
• Austrian shunts
• NMIs who build their own shunts
• Fluke’s A40 & A40A shunts
A40B Product Sales Training - Jan '09
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Guildline 7340 Series of
Precision AC Shunts
• Based on an older design
• Requires external cooling
fans
• Lesser performing specs than
A40Bs
• New to market & unproven
• Shown at CPEM 2008 &
NCSLI, but had markedly less
interest vs. A40Bs
• Not promoted on the web site
• Pricing unknown
A40B Product Sales Training - Jan '09
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SP Shunts (Sweden’s NMI)
• Based on the original “squirrel
cage” design from Japan &
Russia, now used for the A40B
• SP has sold these shunts for a
number of years
• Fluke owns a set as the
metrology standards used for
Fluke’s 6100As
• Now SP has an improved design
to 100A with low ac/dc difference
• Costly to purchase, essentially
“hand made”
• Future support is ad hoc
A40B Product Sales Training - Jan '09
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Norway’s JV Shunts
• Experimental Shunts
• Better performance for
AC/DC difference
• Very limited current range:
• 30 mA to 100 mA
• Potentially better bandwidth
to 1 MHz
• Probably only available to
other NMIs
• Difficult to repeatedly
manufacture
A40B Product Sales Training - Jan '09
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Fluke A40 & A40A Shunts
• Current Shunt of choice:
many thousands are used
throughout the world
• Written into all Fluke
calibration procedures
• Well known and
understood
• Difficult to use (3 times
more complex of a
measurement process vs.
A40Bs)
A40B Product Sales Training - Jan '09
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A40B Product Overview
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Four fully enclosed shunts: 1 mA, 10 mA, 20 mA, 50 mA
Five small size radial shunts: 100 mA, 200 mA, 500 mA, 1 A, 2 A
Three medium size radial shunts: 5A, 10 A, 20 A
Two large size radial shunts: 50 A, 100 A
A40B Product Sales Training - Jan '09
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Report of Calibration
A traceable certificate is included
(in 2009 we plan to offer an optional accredited certificate)
A40B Product Sales Training - Jan '09
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Speaking of CalibrationHow Fluke Calibrates A40Bs
Automated with a
MET/CAL based system
Measured by
nanovoltmeters
The source is a 100A
Transconductance
amplifier driven by a
5720A
Calibrated against a
reference shunt
A40B Product Sales Training - Jan '09
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Verification of Lower Range
Shunts
A40B Product Sales Training - Jan '09
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Verification of Lower Range
Shunts
Low & Hi Current
A40B Product Sales Training - Jan '09
Calibration Adapters
32
Verification of Lower Range
Shunts
Measure shunt voltages
using special Single
Junction Thermal
Voltage Converters
A40B Product Sales Training - Jan '09
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Verification of Lower Range
Shunts
Neutral, Non Conductive/Non
Magnetic Work Surface
A40B Product Sales Training - Jan '09
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Verification of 20A Shunts
A40B Product Sales Training - Jan '09
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Verification of 100A Shunts
A40B Product Sales Training - Jan '09
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Verification of 100A Shunts
Air Flow Vents for cooling
A40B Product Sales Training - Jan '09
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Commercial Information
Summary
• Refer to Product
Announcement for details
• Pricing ranges from
~$2K to ~$11K per shunt,
and ~ 52K$ for the set
• Similar to original A40
series shunt price plus cal
price
• Remember –
A40B shunts include a
non-accredited
Calibration Cert at no
extra charge!
A40B Product Sales Training - Jan '09
download from the
sales partner portal
38
Ordering Information
Options and Accessories
MODELS
A40B/SET
Complete set of 14 shunts with
case and recommended
connectors, adapters, and leads
Individual Shunts
A40B-001MA 1 Milliamp Current Shunt
A40B-010MA 10 Milliamp Current Shunt
A40B-020mA 20 Milliamp Current Shunt
A40B-050mA 50 Milliamp Current Shunt
A40B-100mA 100 Milliamp Current Shunt
A40B-200mA 200 Milliamp Current Shunt
A40B-500mA 500 Milliamp Current Shunt
A40B-1A
1 Amp Current Shunt
A40B-2A
2 Amp Current Shunt
A40B-5A
5 Amp Current Shunt
A40B-10A
10 Amp Current Shunt
A40B-20A
20 Amp Current Shunt
A40B-50A
50 Amp Current Shunt
A40B-100A
100 Amp Current Shunt
A40B Product Sales Training - Jan '09
A40B-ADAPT/LC
LC Male to LC Male adapter [1]
A40B-ADAPT/LCN
LC Female to N Male inter-series adapter[1]
A40B-LEAD/N
N male to N Male lead[1]
A40B-LEAD/4mm
N to 4 mm double banana connector [2]
A40B-CAL/LC
High current adapter to connect two
shunts in series for measurement (LC to
LC)
A40B-CAL/N
Low current adapter to connect two shunts
in series for measurement (N to N)
A40B/CASE
Fiberglass Transit Case [1]
Available soon
UKAS Accredited Calibration
[1] A quantity of one of this accessory item is included in the
A40B/SET
[2] A quantity of two of this accessory item is included in the
A40B/SET
39
A40B-SET
• Complete kit includes:
• All 14 Shunts
• Common Leads
• 1 x A40B-LEAD/N
• 2 x A40B-LEAD/4MM
• Common Adapters
• 1 x A40B-ADAPT/LC
• 1 x A40B-ADAPT/N
• Transit Case
• Kit priced with ~2.5%
discount
A40B Product Sales Training - Jan '09
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Accessory Leads
A40B-LEAD/4MM
• N Male to 4mm double
banana plug
• Connects shunt to
multi way binding
posts, i.e.:
• Sources: 57XX,
55XX,…
• Detectors: 8508A,
5790A, 3458A, …
A40B Product Sales Training - Jan '09
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Accessory Leads
A40B-LEAD/N
• N Male to N Male lead
• Connects shunt to N
Type input connector
of measuring device
• For example: 5790,
792
A40B Product Sales Training - Jan '09
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Accessory Adapters
A40B-ADAPT/LCN
• LC Female to N Male
• Typically connects to LC sources
to N Type instruments or leads
• Usually used to adapt a current
input connector of an A40B shunt
to an source using an LC
connector
A40B-ADAPT/LC
• LC Male to LC Male
• Used as connector adapter
A40B Product Sales Training - Jan '09
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Accessory A40B-CASE
• Used to hold the full
set of 14 shunts plus
leads and adapters
A40B Product Sales Training - Jan '09
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Specialized Shunt Calibration
Accessories
A40B-CAL/LC &
A40B-CAL/N
• Used for calibration of
A40B shunts
• Connects two shunts in
series with a current
source
• Only required by “self
supporting” customers
who will do their own
calibration of A40B
shunts
A40B Product Sales Training - Jan '09
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Sales Tools
A40B Datasheet
• Main Customer Facing
Piece
• Product Details
• Specifications
download from the sales partner portal
or fluke web site
A40B Product Sales Training - Jan '09
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Sales Tools
A40B User’s Manual
• Key Information
• Official Specifications
• Technical Usage details
• Calibration Details
download from the fluke web site
A40B Product Sales Training - Jan '09
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Sales Tools –
Example Calibration Certificate
download from the sales partner portal
A40B Product Sales Training - Jan '09
48
Sales ToolsCable & Adapter Datasheet
download from the sales partner portal
or fluke web site
A40B Product Sales Training - Jan '09
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Sales ToolsCustomer HTML
download from the sales partner portal
A40B Product Sales Training - Jan '09
50
Sales ToolsCustomer FAB Chart
• Identifies key A40B
features
• Describes it’s
advantage & the
customer’s benefits
download from the sales partner portal
or fluke web site
A40B Product Sales Training - Jan '09
51
FAB Details
FEATURE
ADVANTAGE
BENEFIT
radial design
Design minimizes Inductive fields, heating
distributed, no forced cooling required
Proven by many NMI's as technically the best performing shunt design with
the for best bandwidth, fewest parasitics, etc.
Permits current measurements over a high
bandwidth with small phase shift, and negligible
phase error
Reduced compliance/loading for high frequency currents
Calibrate precision sources where low phase error is necessary, such as
Fluke 6100A;
Permits critical measurements of power applications where V and I phase
integrity are essential
low
inductance
small power
coefficient
wide
bandwidth
Minimal self heating effects
Excellent linearity over wide range of inputs
A better matches for typical bandwidth of
current sources
specified with usable, high performance specs from DC to 100kHz
low phase
displacement
Excellent fit for power measurement
applications
usable in power/phase applications where phase accuracy and stability are
key
excellent for non sine wave measurement applications
DC and AC
spec
Useable to directly measure AC current
Many applications need only to take direct measurements, AC-DC transfer
complexity not needed, reduces measurement complexity by two thirds
Smaller errors to be compensated
flat with minimal errors through a wide bandwidth. Few applications will
require AC-DC comparison measurements
Very small change of resistance with
temperature
Measurements
less affected by ambient temperature changes
Reliable DC performance over time
Work through most ranges of current sourcing
instrumentation
Calibrate only once per year for many applications.
low AC-DC
difference
small
Temperature
Coefficient
Stability
wide range
1ma to 100A
A40B Product Sales Training - Jan '09
widest range of any commercial precision shunts
52
FAB Details
FEATURE
ADVANTAGE
BENEFIT
4 terminal design
Current does not flow in voltage circuit
measure with high accuracy techniques, completely isolates measured voltage from
extraneous current path resistance
Current accuracy to
20 ppm
Specs support accurate current measurement
with single test approach
direct measurement of precision sources is viable, no need for AC-DC transfer
measurements
output voltage
nominal at.8 V
Measurable by a wide range of detectors, so to
fit many applications
compatible with a wide range of measurement devices, precision dmms (8508As),
sampling dmms (3458s), AC-DC Transfer Standards (792As), AC Measurement
Standards (5790As), and Thermal Voltage Converters (TVCs)
buffered 1mA shunt
Voltage measurement circuit isolated from
Current circuit
permits low current measurements with high voltage levels, and eliminates
interaction with measurement impedance of detector
N Connectors
Uses a commonly used and available
connector
Better compatibility with cabling and instrumentation than UHF style connectors,
compatible with both input and output requirements from 1mA to 20 A
LC Connectors
Best for high current applications
high current output for 50 and 100 amp shunts, compatible with high current
sources
no fans required
Easier and more controllable measurement set
up
Design permits use without external cooling fans, low TC.
A40B Product Sales Training - Jan '09
53
Sales ToolsValue Selling Check Sheet
• A sales person’s
reference for offering
value to a customer
• Order checksheet
• Points of differentiation
• Key features and
benefits
download from the sales partner portal
A40B Product Sales Training - Jan '09
54
Value Selling Check Sheet
download from the sales partner portal
A40B Product Sales Training - Jan '09
55
Sales ToolsHandling Customer FAQs
TOPICS
• Cables and Adapters
• Design
• Usage
• Shunt Design points
• Calibration
• 1 mA Shunt battery
download from the sales partner portal
or fluke web site
A40B Product Sales Training - Jan '09
56
Other Sales Oriented FAQs
• Will the A40 and A40A cease to available?
• No firm plans at this time, but they will be phased out in the future
• Will Fluke published cal procedures for existing
calibrators be upgraded to use A40B’s rather than the
older A40s and A40As?
• Yes, we anticipate that will be done in 2009
• Can A40Bs be used for AC/DC transfer measurements?
• Yes, their cal certs calibrate their AC/DC difference and
customers can use this as they would their earlier versions of
A40 shunts. It can improve uncertainties.
A40B Product Sales Training - Jan '09
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FAQs
• Why is the output at 0.8 volts when the 792A range is
700mV?
• This output level is optimum for digital sampling wattmeter
applications using the 3458 on the 1V range – providing a peak
measurement at just under 1.2 volts.
• Most applications will be done by direct measurement of the
shunt voltage using DMMs.
• It is acceptable to calibrate 792A at the 0.4 volt calibration point
for AC/DC transfer measurements.
A40B Product Sales Training - Jan '09
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Sales ToolsDemo Kits
• Each Sales Entity has a kit
with
• One Medium Radial Shunt
• 5, 10 or 20A
• One Small Radial Shunt
• Sized 100mA to 2A
•
•
•
•
One 1 mA Shunt
Two Leads
Cal Cert
User's Manual
• A 100A Shunt is available
to borrow from Everett
A40B Product Sales Training - Jan '09
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Summary & Conclusion
• The A40B Precision Shunt series offer improved and
simpler method for traceable measurement of current
• Extended ranges to 100A, and frequencies to 100 kHz
offer immediate improvements to labs using the earlier
A40 series shunts.
• Direct measurement will simplify current calibration
metrology for calibrators and precision sources.
• The A40B, while a new product, is a proven and accepted
design.
Go and introduce the new A40B Precision
Shunts to every metrology lab that make
precision current measurements.
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For questions and technical help –
email: [email protected]
or
phone: 1 (800) 993-5853
or 1 (425) 446-6476
A40B Product Sales Training - Jan '09
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