New products now available from Measurements International.
8110A 10 Volt Reference
Introducing the Model 6200A Cryogenic Current Comparator Bridge (CCC) from Measurements International (MI) – the ultimate solution for achieving the highest level of resistance calibration accuracy. With an uncertainty of less than 3 parts in 10-9, our CCC surpasses all other technology on the market.
Since 1987, MI has been a leader in providing the most accurate DCC room temperature resistance bridges, allowing customers to achieve unbeatable accuracy levels. However, with the introduction of the Model 6200A CCC, we are proud to take your resistance calibration capabilities to new heights.
Designed by Dr. Carlos Sanchez, a renowned expert in precision electrical metrology with years of experience in CCC Bridges and Quantum Hall Resistance Standards (QHR), the Model 6200A is the ultimate choice for metrology laboratories. Don’t settle for anything less than the best – trust MI to deliver unmatched accuracy and precision. Upgrade to the Model 6200A today.
Measurements International has developed the 6314A Precision Current Divider with the aim to replace/ improve the outdated and often inaccurate Current Shunts being used. The 6314A is a 1000:1 Current Divider that works on the principal of the world-renowned MI Resistance Bridge and Extenders. Traditional Current Shunts suffer from temperature stability and power coefficient issues that greatly affect the users ability to make accurate measurements. The current transformer used in the 6314A has no such issues. The 6314A uses the ratio of two sets of windings on a DC Current Comparator (DCC) to divide the input current by 1000. The 6314A minimum current is 150 A, and the maximum current is 3000 A.
The 6314A can accept both DC and AC current with the uncertainty of approximately 20 times less than a DC Current Shunt.
The 6314A can also be combined with the 6311A to reduce very large currents down to mA. For instance, a 6314A can be used to divide up to 3000 A down to 3 A, which can be further divided to 30 mA using a 6311A. In this way a 1 Ω standard resistor and an 8 ½ digit DMM can be used to measure 3000 A with uncertainties of a few ppm.
Since 1993, MI has earned a worldwide reputation for Dependability, Quality, and Performance.
|No Temperature Coefficient||Reduces uncertainty|
|No Stabilization Period||Measurements can be made immediately|
|No Power Coefficient||No error difference from 5% to 100% of the range|
|AC/DC||DC or AC Operation|
|CT/Current Divider||Current In is divided by 1000|
|< 5 ppm (DC) / < 20 ppm (AC)||∼ 20 times less than a traditional Current Shunt|
|Low Cost of Ownership||Without the need for routine calibration, it saves on calibration and shipping costs|
Measurements International has developed the 6311A Precision Current Divider with the aim to replace/improve the outdated and often inaccurate Current Shunts being used. The 6311A is a 100:1 and 1000:1 Current Divider that works on the principal of the world renowned MI Resistance Bridge and Extenders. Traditional Current Shunts suffer from temperature stabilities and the power coefficient issues that greatly affect the users ability to make accurate measurements. The current transformer used in the 6311A has no such issues. Simply apply power and measure the divided output. The 100:1 range has a maximum current of 10A and the 1000:1 range has a maximum current of 300A. Both ranges can accept both DC and AC current to 1kHz with uncertainty of < 5 and < 20 parts in 106 respectively. In comparison, a DC Current Shunt will have a calibration uncertainty of 0.01% or larger in most cases.
Since 1993, MI has earned a worldwide reputation for Dependability, Quality, and Performance. The 6311A uses the ratio of two sets of winding on a DC Current Comparator (DCC) to measure.
|No temperature coefficient||Reduces uncertainty|
|No stabilization period||Measurements can be made immediately|
|No power coefficient||No error difference from 5% to 100% range|
|AC/DC||Works at DC and AC up to 1kHz|
|CT/Current Divider||Current In is divided by either 100 or 1000|
|< 5 ppm DC / 20 ppm AC||Approximately 1/20th of a traditional Current Shunt|
Developed & designed by metrologists for metrologists & calibration technicians
Measurements International’s new Automated Resistance Standard model 1310A is an easy-to-use, cost-effective calibration instrument that will give the military sector, national and third-party laboratories complete confidence in resistance standards. Designed with input from a world-leading National Measurement Institute, customers can be confident this new design offers exceptional calibration results.
|9 resistors 1 Ω, 10 Ω, 100 Ω, 1 kΩ, 10 kΩ, 100 kΩ, 1 MΩ, 10 MΩ, 100 MΩ, 1 external channel.||Complete line of decade value standards in one temperature-controlled enclosure.|
|Hand-picked high-precision resistors in a temperature-controlled chamber.||Delivers the highest level of performance from the internal high precision resistors.|
|Internal resistance elements in a temperature-controlled chamber.||Excellent stability and extremely low-temperature coefficients.|
|Single output cable for direct plug-in.||Easy operation without the requirement for changing wires.|
|Built for calibration of calibrators and DVMs.||Best stability < 2.5 μΩ/Ω/Year.|
|Built-in 4-terminal scanner.||Combining two instruments into one simple-to-use instrument.|
|External extra channel.||Connect to resistance value of your choice.|
|Front panel or GPIB controlled.||Simplifies operation for user.|
|Internally mounted temperature sensor PT100.||Users can connect to front panel and monitor internal oven.|
Figure 1. Drift of MI Resistor Over a 10 Year Period
Figure 2. 24 Hour Stability Testing Internal Temperature Chamber
Three Standards – One Box
Measurements International’s recently launched Artifact Transfer Standard (1330A) is a highly versatile, accurate instrument that meets laboratory requirements for automated artifact calibration (to assign values to internally generated parameters) on calibrators and DMMs.
This process is typically performed using a small number of standards at recommended calibration intervals indicated in the calibrator or DMM manufacturers manual. The 1330A is composed of a temperature-controlled instrument enclosure, three reference standards, and a battery backup. A power supply is external (part of the power cable).
|Primary 1 Ω, 10 kΩ and 10 V references.||All standards provided in one
|Clear connection for JVolt Comparison of 10 V Zener.||Providing highest level traceability.|
|Manual (push buttons on the front panel) or automated control (select by GPIB interface).||Ability to select appropriate standard (choice of 3) for calibration.|
|Output connections to calibrator or DMM on front panel.||Choice of cables available (and supplied) feature direct plug-in for 57XX series calibrators or to the 3458A DMM.|
|Current standard value is extrapolated from prior calibrations.||Enhanced automation and improved accuracy.|
|Oven temperature monitored by internal PRT.||Provides better performance of artifacts as the temperature
environment is stable and controlled to less than 100 m°C.
|Calibrated values of the standards entered in the unit.||No requirement for set-up.|
|Front panel display showing certification value.||Quick access and reference to information.|
Simplify Your Procedures. Simplify Your Work.
Never before has DC voltage calibration and/or verification of DVMs and calibrators been so easy or reliable. Measurements International’s recently launched 1340A is the metrology industry’s leading choice thanks to its simplistic design, backed with the best features for optimal performance.
Model 1340A is another fine example of MI’s history and world-leading experience in resistance. We invite metrologists and calibration technicians in national, military and third-party calibration laboratories to compare the performance of the 1340A against any products on the market today.
|10:1, 100:1 and 1000:1 reference divider outputs to 1100 V||Extreme precision to compare direct voltage levels of various sources to a 10 V voltage reference standard like a 1330A, 732B or 732C.|
|Industry-leading specifications require no self-alignment or calibration prior to use.||Customers no longer need to self-align or calibrate prior to each use. Saves time and money and frustration!|
|Utilizes a special design network of high precision resistors mounted in a temperature-controlled chamber.||Shields divider resistors from outside noise and provides temperature stability to improve performance.|
|Front panel direct connection to calibrator; divider output connection to DVM for testing; both done with supplied cables.||Ease of use, saves time and money.|
|Internally mounted temperature sensor PT100.||Users can connect to the front panel and monitor
|New special hand-selected resistors and configuration.||Lengthy, self-alignment is no longer required to create a divider network.|
|Calibration of divider performed directly against a 1330A, 732B or 732C reference.||Industry-leading advancement in the DC voltage divider commercial products which delivers exceptional performance.|
Figure 1. Example: 1000 V in divided to 10 V out to be measured
Offering the easiest-to-use instrument with complete confidence.
Figure 2. The above diagram illustrates using a 1330A, 732B or 732C reference in the connection sequence. A DVM can be used as a NULL detector to determine the offset of the 57XX series on the 10:1 and 100:1 ratio.
No Self-Alignment Required
Figure 3: 24-Hour Stability of Temperature Chamber
With the release of the commercial Z1000 iSimulator, the process for calibration of LCR meters has been taken to a new level. The Z1000 covers the full calibration of LCR meters over simulated impedances from 100 Hz to 20 kHz while eliminating the need for external standards and providing a much simpler, easier-to-use method of LCR meter calibration.
|One instrument full LCR meter calibration.||Simple, easy-to-use method of calibration of LCR meters.|
|Only two probes (resistors) require calibration.||Cost savings of not having to have
|Characterization over full range.||Not limited in the range like artifact method.|
|Eliminates external standard requirements.||Eliminates manual artifact method, requires little space.|
|Large frequency range 100 Hz to 20 kHz.||Calibrate a large range of LCR meters.|
|NMI METAS design.||Design and instrumentation industry-proven by leading experts.|
|Fully automated software.||All calculations and work is already done in the provided software.|
The Measurements International model Z1000 prototype and initial design were done by METAS in Switzerland. It was designed to address and fill the need and requirement for a better way to calibrate LCR meters. The current method of calibration of LCR meters requires highly accurate impedance standards (inductors, capacitors and resistors) that have to have traceability maintained, in which the procedure for calibration is time-consuming and requires a lot of manipulation of the standards making the measurement procedure complicated. Another large drawback of the previous method was that only a small fraction of the measurement capability of the LCR meter is tested because the reference standards usually have a decade value and phase angles close to the -90 degrees (capacitors), 0 degrees (resistor) or 90 degrees (inductors).
If you are familiar with the current method used to calibrate LCR meters (external inductors, resistors, capacitors) then you are aware of the very time-consuming and multiple manual manipulation components of the process. The Z1000 was designed with this in mind. It was designed with a very user-friendly operational software that limits customer manual need for changing of connections and offers a simple step-by-step operation that provides constant automatic verification of the setup, and automatic switching and measurement procedures.
The Z1000 offers a new, more advanced approach. In the Z1000, the current and the voltage measured by the LCR meter to calculate the impedance are independently generated by two external voltage sources.
Adjusting the amplitudes and the relative phase of the voltage sources, the synthesized impedance can cover the entire complex plane. This concept was first proposed in 1994. More recently, a new design of the Z1000 – based on recently available, high-grade electronics components that have been designed.
The Z1000 covers calibrations in the frequency range from 100 Hz to 20 kHz and the magnitude of the synthesized impedance ranges from 1 Ω to 10 MΩ with an arbitrary phase angle.
S1 supplies the voltage to HP, the second source S2 supplies the current to the LC port. Then the LCR meter calculates the value of the impedance. Because the two sources are independent, it is possible to arbitrarily choose the relative phase between the two, therefore the resulting impedance can be simulated to cover the entire complex plane.
A single MUX is used to accurately measure the actual voltage Vv supplied to HP input, and the voltage drop Vi generated by the current flow through ZCB.
The accuracy of the Z1000 is based on the accuracy of the LCR meter under test. This is because the uncertainty of the resistor is around 10-8 and the uncertainty of the clock is 10-12. Most LCR meters have a specification of about 500 ppm. When calculating the overall uncertainty, the resistor and clock are negligible!