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Introducing the microK

Isothermal Technology Ltd

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What is the microK? A New Instrument providing

performance better than 1mK Manufactured by Isotech

Designed Exclusively for Isotech Not a badged instrument

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Why is it exciting? A great deal, it is the most accurate instrument

in its class, the only instrument to work at this precision with platinum resistance thermometers, thermistors and thermocouples.

The core measurement technology was developed in conjunction with the National Physical Laboratory

NPL and microK has the sole license for the use of this technology for temperature measurement.

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The A to D Uses specially designed analogue to digital converter

used in conjunction with a digital signal processor (DSP)

Uses a unique adaptation of existing advanced sigma-delta ADC techniques to achieve linearity better than 0.4 ppm.

A further major benefit of this ADC technique is its low noise performance, reduced by a factor of 32 over conventional sigma-

delta ADC circuits.

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Accuracy The microK achieves 0.4ppm over the

whole range For SPRTs equivalent to 0.4mK

For Voltage the specification is 250nV at 20mV Equivalent to 0.01°C for a Gold Platinum

thermocouple at 1000 °C

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Accuracy Resolution

Resistance: 0.01ppm of range Voltage: 10nV on 125mV Range

Stability Voltage 3 ppm / year

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Resistance AND Voltage microK supports

SPRTs and IPRTs Thermistors Thermocouples

Only instrument in its class to do this

A DVM with comparable performance has a similar cost to the microK alone

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Zero Drift for Resistance The microK uses a “substitution

technique” in which the Device-Under-Test and the Reference are successively switched This means that the stability of resistance ratio

measurements is immeasurably small

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Three Channel Three Input Channels

Best Practise Ready Allows two standards and a device under test to

be connected simultaneously

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Easy to Use Operated by

large touch screen display Intuitive Can add

keyboard and mouse

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Easy to Use Includes Graphing Facility

Auto or Manual Scales Intuitive

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Easy to Use Log Data to Internal Memory Or USB Pen Drive

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Solid State - Reliable All Solid Sate Reliable

No potentiometers No Dials No Knobs No Relays

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microK A new standard for secondary calibration laboratories

Accuracy - SPRT Better than 1mK Over Whole Range

Channels Three

Probes Supported SPRTs, PRTs, Thermistors and Thermocouples

Solid State Design All solid state NO relays or dials

Stability 0ppm / per year

Measurement Time 1 Second

PC Interface RS232 and USB

Units Ratio, V, °C, °F and K

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microK – Further Information Http://

www.isotech.co.uk/microk Data Sheet Technical Articles Article From Cal Lab

Magazine Latest News

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microK A new standard for secondary calibration laboratories