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The microK 70 and 125 models are designed for the Primary Temperature Laboratories whilst the microK 250 and 500 models were designed for the Secondary Laboratory as well as a wide range of high accuracy industrial and scientific calibration applications.

  • Ratio Accuracy to <0.02ppm (20ppb) with Zero Drift
  • SPRTs, PRTs, RTDs, Thermistors and Thermocouples
  • Reliable 21st Century 100% Solid State Design

DESCRIPTION

The milliK Precision Thermometer from Isotech sets a new standard for the high accuracy measurement and calibration of Platinum Resistance Thermometers, Thermistors, Thermocouple and Process Instrumentation (4-20mA) over the range -270°C to 1820°C.

The milliK has two input channels for sensors and a third channel for current. It can be expanded to become a measuring system with up to 33 channels reading SPRTs, RTDs, Thermistors, or Thermocouples with the option to control calibration baths and log readings accurately.

In addition to low uncertainty measurements from Reference Standards and Industrial sensor measurement the milliK can control Isotech temperature sources, sequencing through a programmable list of temperature set points and log data to internal memory or a USB drive.

Wide Range of Sensors
SPRTs, PRTs, Thermistors, Thermocouple and 4 – 20mA
High Accuracy
< ±5ppm for PRTs, ±2μV for Thermocouples and ±1μA Transmitters
Logs – Controls Isotech Temperature Sources
Massive logging capacity – controls Dry Blocks and Liquid Baths
Benefiting You
The milliK sets a new standard for value, versatility and accuracy – < ±5ppm over range for PRTs, ±2μV for Thermocouples and ±1μA for current transmitters, see Data Sheet.

Supporting a wide range of sensors and functions it replaces individual devices making a cost effective calibration solution.
A robust design and operation from AC or DC power allows the milliK to be used in the laboratory, test room or out in the field.

The milliK can display in °C, °F, K, Ohms, mV and mA with numeric and graphical display modes. The large back lit display makes configuring the instrument and setting the scrolling strip charts intuitive. The USB port allows for the use of a mouse, keyboard or USB Drive.

No Compromise Design
The design team have considered industrial users and applications in order to avoid measurement errors and problems encountered in some instruments from other manufacturers:

Eliminates Thermal EMF Errors in PRTS
Fast current reversal technology and solid state switching eliminate thermal EMF effects avoiding the errors that occur with fixed DC instruments.
Lead Wire Correction
PRT lead wire errors are eliminated for up to 30m of four core screened cable.
Galvanic Isolation
Not only are the two sensor channels galvanically isolated, the 4 – 20mA input is also separately isolated. The benefits of the advance design are no ground loops, improved safety and noise immunity.
High Resolution
The display resolution is 0.0001°C (0.1mK) made possible by using a powerful Sigma Delta Analogue to Digital converter to achieve a true measuring resolution of just 28μΩ equivalent to 0.00007°C (0.07mK) for PRT inputs.

USB Port
To simplify data entry simply connect a mouse and or keyboard – or a USB Drive to export logged data.

選型詳細

ARAMETER MICROK 70 MICROK 125 MICROK 250 MICROK 500
Accuracy Whole Range (SPRT Ro ≥ 2.5Ω) [1] 0.07ppm 0.125ppm 0.25ppm 0.5ppm
Accuracy Ratio 0.95 to 1.05 [2] 0.017ppm 0.03ppm 0.06ppm 0.125ppm
Equivalent Temperature Accuracy [2] 0.017mK 0.03mK 0.06mK 0.125mK
Resolution 0.001mK 0.001mK 0.01mK 0.01mK
PARAMETER MICROK 70 MICROK 125 MICROK 250 MICROK 500
Accuracy Whole Range (SPRT Ro ≥ 2.5Ω) [1] 0.07ppm 0.125ppm 0.25ppm 0.5ppm
Accuracy Ratio 0.95 to 1.05 [2] 0.017ppm 0.03ppm 0.06ppm 0.125ppm
Equivalent Temperature Accuracy [2] 0.017mK 0.03mK 0.06mK 0.125mK
Resolution 0.001mK 0.001mK 0.01mK 0.01mK
Ratio Resolution 1 ppb 1 ppb 10 ppb 10 ppb
Resolution Voltage 10nV 10nV 10nV 10nV
Stability 0ppm/yr [3] 0ppm/yr [3] 0ppm/yr [3] 0ppm/yr [3]
TC (resistance ratio) [4] 0ppm/ ° C [3] 0ppm/ °C [3] 0ppm/ °C [3] 0ppm/ °C [3]
Resistance Range 0-100 kΩ 0-100 kΩ 0-500kΩ 0-500kΩ
Voltage Range (Thermocouple) ±125mV ±125mV ±125mV ±125mV
Internal Resistance Standards 25, 100, 400Ω 25, 100, 400Ω 1, 10, 25, 100, 400Ω 1, 10, 25, 100, 400Ω
Internal Standard TCR <0.5ppm/°C ² 1, 10Ω <0.6ppm/°C <5ppm/year
Resistor Stability Annual Stability <2ppm/year 25, 100, 400 <0.3ppm/°C <5ppm/year
Interfaces RS232, GPIB & USB & Ethernet RS232, GPIB, USB
Power 25W maximum, 1.5A (RMS) maximum 20W maximum, 1.5A (RMS) maximum
Weight 13.3kg 13.3kg 12.4kg 12.4kg
microK 型錄
PDF
microK 問答集
PDF
Sample microK Calibration Certificate – NIST
PDF
microK 介紹