New products now available from Measurements International.

1310A Automated Resistance Standard

1310A Automated Resistance Standard

1310A

  • 9 Resistors 1 Ω, 10 Ω, 100 Ω, 1 kΩ, 10 kΩ, 100 kΩ, 1 MΩ, 10 MΩ, 100 MΩ, 1 External Channel
  • Front Panel of GPIB Controlled
  • Single Output Cable for Direct Plug-in
  • Maintained in Temperature-Controlled Chamber
  • Built for Calibration of Calibrators and DVM’s
  • Best Stability < 2.5 μΩ/Ω/Year or (< 2.5 ppm/Year)
  • Other Resistor Elements Available

Features

The MI model 1310A was designed to provide customers with a user-friendly, cost-efficient 9-element resistance standard with a built-in scanner to be used in the characterization of DVMʼs and calibrators.

The MI model 1310A was designed and developed by metrologists for metrologists! The ease of use of the 1310A makes it the ideal choice for use in the calibration and maintenance of calibrators. Metrologists and calibration technicians in national laboratories, the military, and third party calibration laboratories will be greatly impressed with the performance of the 1310A.

The nine-resistance elements cover the range from 1 Ω to 100 MΩ. Other resistor elements such as the 25 Ω and 400 Ω are available. An external extra channel is included which allows users to connect a resistance value of their choice. The internal resistance elements are housed in a single temperature-controlled chamber and feature excellent stability and extremely low-temperature coefficients.

1310A Block Diagram

Figure 1. Resistance Box

A few companies claim unproven specifications, we ask you to talk to your NMI or other NMIʼs about which product is proven and meets its specifications!

The 1310A uses high precision resistors mounted in a temperature-controlled chamber. This allows for the highest level of performance from the internal high precision resistors. The operation was designed to offer customers the easiest-to-use instrument with complete confidence. An internally mounted temperature sensor PT100 allows users to connect to the front panel and monitor the internal oven.

The 1310A uses high precision handpicked resistors mounted in a temperature-controlled chamber. This allows for the highest level of performance from the internal high precision resistors. For years, MI has been providing the very best in resistance standards to metrologists and calibration technicians in national laboratories, the military, and third-party calibration laboratories.

Figure 2. Drift of MI Resistor Over a 10 Year Period

Figure 2. Drift of MI Resistor Over a 10 Year Period

The operation was designed to offer customers the easiest-to-use instrument with complete confidence. A new design on temperature enclosure based on input from a world-leading NMI, provides customers with the very best in temperature stability.

Take a look at just how good the 1310A performs over 24 hours!

Figure 3. 24 Hour Stability Testing Internal Temperature Chamber

Figure 3. 24 Hour Stability Testing Internal Temperature Chamber

1330A Automated Artifact Calibrator

1330A Automated Artifact Calibrator

1330A

  • Primary 1 Ω, 10 kΩ and 10 V References
  •  3 Standards in One Box Inside a Temperature-Controlled Chamber
  • Direct Plug-in Cable to 57XX Terminals
  • Front Panel or GPIB Controlled to Select Output
  • Front Panel Display Showing Certification Value
  • Clear Connection for JVolt Comparison of 10 V Zener
  • Battery Backup Option > 72 Hours

Features

FULLY AUTOMATED ARTIFACT CALIBRATION OF CALIBRATORS
AND DMM’S FROM A SINGLE INSTRUMENT

The model 1330A is a highly versatile, accurate instrument that meets laboratory requirements for automation of artifact calibration on calibrators and DMMs. The model 1330A Artifact Calibrator is made up of one instrument enclosure and three reference standards. Artifact calibration is used to assign values to internally generated parameters of the calibrator or DMM. It is a process that is typically performed in calibrating an instrument using a small number of standards. Artifact calibration is typically performed at the recommended calibration intervals as indicated in the calibrator or DMM manufacturers manual.

The MI 1330A can be operated both manually and under automated control to select the appropriate standard. Under manual mode, the selection is done via push buttons on the front panel. Under automated control, the standards can be selected via the GPIB interface. Calibrated values and uncertainties for the artifacts are entered over the IEEE-488 bus. The extrapolated current standard value of the artifacts in the 1330A, based on past calibrations, is used for enhanced automation and improved accuracy.

Output connections to the calibrator or DMM are made from the front panel of the 1330A. The output cable (supplied) features a direct plug-in cable for the 57XX series calibrators or to the 3458A DMM. Other cables can be supplied.

The model 1330A comes equipped with an internal battery that will last up to 24 hours. For extended battery operation, an optional battery pack, model 1330A-PS power supply, contained in its own enclosure, plugs into the rear of the 1330A, is available.

The 1330A is shipped cold and requires about 12 hours of warm-up to reach its operating temperature. The temperature of the oven is monitored by an internal PRT. The 1330A comes with the calibrated values of the standards entered in the unit and is supplied (shipped) in a reusable container.

1340A High Precision Voltage Divider

1340A High Precision Voltage Divider

  • Sub-ppm Ratio Uncertainties
  • 10:1 and 100:1 Divider Outputs
  • Voltages to 1100 Volts
  • Maintained in Temperature-Controlled Chamber for Optimal Performance
  • Built for DC Voltage Characterization of Calibrators and DVM’s
  • Ratio Uncertainty 0.2 μV/V and 0.4 μV/V
  • Output Compared to a 1330A, 732B or 732C 10 V Reference
  • No Self-Alignment Required

Features

The MI model 1340A was designed and developed by metrologists for metrologists! It was designed to provide customers with a user-friendly, cost-efficient reference voltage divider to be used in DC Voltage calibration and/or verification of DVMʼs and calibrators. The ease of use and low cost of the 1340A makes it the ideal choice for voltage measurement.

Metrologists and calibration technicians in national laboratories, the military, and third-party calibration laboratories will be greatly impressed with the performance of the 1340A. The 1340A Reference Dividers are precision 100:1 and 10:1 divider designed primarily for comparing direct voltage levels of various sources to a 10 V voltage reference standard like a 1330A, 732B or 732C reference. A simple connection to the front panel for the 100:1 or 10:1 ratio is done directly to the calibrator through a supplied cable. The output of the divider is then connected to the DVM for testing also through a supplied cable. It’s that simple!

1340A Block Diagram
Figure 1. Example: 1000 V in divided to 10 V out to be measured!

The 1340A utilizes a special design network of high precision resistors mounted in a temperature-controlled chamber shielding the divider resistors from outside noise and provides temperature stability improving performance. This allows for the highest level of performance from the internal high precision resistors. The operation was designed to offer customers the easiest-to-use instrument with complete confidence. An internally mounted temperature sensor PT100 allows users to connect to the front panel and monitor the internal oven.

Figure 2. The below 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.

1340A Block Diagram 1

No Self-Alignment Required.

Simplify Your Work, Simplify Your Procedures!

With the special resistors and configuration, the 1340A does not require a lengthy or any self-alignment prior to use. Calibration of the divider is performed directly against a 1330A, 732B or 732C reference. This is an industry-leading advancement in the DC voltage divider commercial products. The model 1340A utilizes MI’s history and world-leading experience in resistance by a special set of hand-selected resistors to create the divider network.

Figure 1: 24 Hour Stability of Temperature Chamber

Figure 3: 24 Hour Stability of Temperature Chamber

 

Z1000 iSimulator Impedance Simulator

Z1000 iSimulator Impedance Simulator

Z1000

  • One Instrument Full LCR Meter Calibration
  • Characterization Over Full Range
  • Eliminates External Standard Requirements
  • Utilizing State-of-the-Art 24-bit ADC and DAC Converters
  • Simulates Impedances From 1 Ω to 10 MΩ
  • Large Frequency Range 100 Hz to 20 kHz
  • NMI METAS Design

The Measurements International model Z1000 prototype and the initial design was 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).

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.

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 was developed by METAS and commercialized by Measurements International to offer customers a simpler, easier-to-use instrument for the calibration of LCR meters.

Z1000 iSimulator Method

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.

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!

Uncertainty Calculation

Uncertainty Calculation

View the product page/data sheet.