Analysis&Measurement / Kelvinion Ultra
Kelvinion Ultra Series
Dilution Refrigerator Temperature Control & Ultra-Precise
Resistance Measurement
1 pA Minimum Excitation Current for Ultra-Low Self-Heating, with AC Bridge Technology Enabling nΩ-Level Resistance Accuracy
Minimum
1 pA
Excitation
Current
Independent / Scanning Temperature
Measurement
3 / 16 Channels
Optimized for Both Measurement Speed
and Channel Density
Minimum
Measurable
Resistance
20 nΩ
0.05% Accuracy
Four-Channel Independent Heating
50 W / 1 W / 1 W / 0.1 W
Meets Diverse Temperature Control Needs
High-Precision AC Bridge Technology
Industry-Leading Temperature Resolution Enabled by Advanced Electronics
Lock-In Amplification
Significantly Improves SNR
Balanced Excitation
Effectively Suppresses Common-Mode Noise
Low-Noise Circuitry Design
Input Noise as Low as 2 nV/√Hz
Application 1
Temperature Control
for Dilution
Refrigerators
High-Precision Temperature Measurement,
Extremely Low Self-Heating Power, and Multiple
Built-In Heating Channels
Feature 1: Temperature Monitoring
Standard
3 Independent Channels
10 Hz temperature reading rate for 3 independent channels
Optional Scanning & Pre-amplifier Modules
2 Independent + 16 Scanning Channels
By connecting to an external scanning & amplifier module, one independent channel can be expanded to up to 16 channels
Feature 2: Heating and Temperature Control
Heating Channel 1
50 W
Current-source heating;
3 measurement ranges;
Recommended for main system temperature control
Heating Channel 2
1 W
Current-source heating;
8 ranges, minimum heating power:1 aW
Recommended for temperature control in the core sample area
Heating Channel 3
1 W
Current-source heating;
16-bit DAC precision
Recommended for temperature control in the evaporator
Heating Channel 4
0.1 W
Current-source heating;
16-bit DAC precision
User-configurable
Practical Case: Precise Temperature Control from 10 mK to 100 mK
Application 2
Electrical Transport Testing
Industry-leading resistance measurement resolution, with 3 independent channels and 16 scanning channels
Superconducting Transition Measurement
Transition temperature measurement and superconducting material screening
Hall effect
measurement
Carrier Concentration and Mobility Measurement
High-Throughput Measurement
Supported the Scanning Channels
Usage & Service Support
Comprehensive Guide to Ensure a Smooth Start for Users
Accessories
A variety of accessories make the Ultra Series powerful and user-friendly
Specifications
➨ Temperature Reading（Isolation between the input and control circuits to reduce interference and improve signal quality）
1 Number of Channels
Independent
Expandable
3
18 channels, 2 independent + 16 scanning
2 Temperature Sensor
Type
Display in
Resistance Thermometer
NTC, Negative Temperature Coefficient Thermometer
PTC, Positive Temperature Coefficient Thermometer
Ω / K / ℃
3 Resistance Measurement Range
Minimum Resistance
Maximum Resistance
Number of Steps
Kelvinion Ultra ( ±0.05% Accuracy )
100 nΩ
Kelvinion Ultra with Scanning & Pre-Amplifier Module （ ±0.05% Accuracy）
20 nΩ
63.2 MΩ
22
4 Measurement Accuracy
5 Excitation type
Method
AC Frequency
Current Steps
AC current excitation
9.8 Hz / 11.6 Hz / 13.7 Hz / 16.2 Hz / 18.2 Hz
1 pA ~ 31.6 mA, a total of 22 steps
6 Voltage Measurement
Principle
Range
AC Bridge
Kelvinion Ultra
25 nV ~ 632 mV, a total of 22 steps
Kelvinion Ultra with Scanning & Pre-Amplifier Module
5 nV ~ 632 mV, a total of 22 steps
7 Minimum Excitation Power
10 -18 W (1 aW，100 kΩ range; for other ranges, refer to ‘4 Measurement Accuracy’)
8 Refresh Rate
10 times/second
9 Calibration Curve
1,000 records (up to 400 points per curve)
➨ Temperature Control Mode 1, Built-in Power Source
10 Temperature Control Channel
Number of Channels
Type of Power Source
Temperature Control
Electrical Connector
Temperature Control Method
Total – 4 channels
Channel 1: Warm-up Heater
Recommended for ‘Main system heating’ in dilution refrigeration scenarios
Channel 2: Sample Heater
Recommended for ‘Final temperature control of the sample’ in dilution refrigeration scenarios.
Channel 3: Still Heater
Recommended for ‘Evaporator temperature control’ in dilution refrigeration scenarios.
Channel 4: Analog Output
Lower heating power for independent temperature control.
* Channels 2 and 3 are isolated from the chassis and measurement circuits, sharing a common ground.
Channel 1 / Channel 2: Adjustable DC current source
Channel 3 / Channel 4: Adjustable DC voltage source
Resistance Heating
Mode 1 – Closed-loop PID
Built-in PID auto-tuning algorithm
P: -10000 ~ 10000；Resolution 0.01
I: -10000 ~ 10000；Resolution 0.01
D: -10000 ~ 10000 %；Resolution 0.01%
Mode 2 – Manual Mode
0 ～ 100 % heating power; manually set, resolution 0.01%
11 Digital-to-Analog Conversion
16 bit
12 Heat Output
Maximum power
Maximum Excitation
Maximum Voltage
Channel 1 / Channel 2 / Channel 3 / Channel 4
50 W / 1 W / 1 W / 0.1 W
Channel 1 / Channel 2 / Channel 3 / Channel 4
1.4 A / ±0.1 A / ±10 V / ±10 V
Channel 1 / Channel 2 / Channel 3 / Channel 4
50 V / ±10 V / ±0.1 A / ±0.01 A
13 Heater Resistance
Channel 1
Resistance 10 Ω ~ 100 Ω
Channel 2
Resistance 1 Ω ~ 2 kΩ
Channel 3
Resistance > 100 Ω
Channel 4
Resistance > 1,000 Ω
14 Power Range
Channel 1
3个, 50 W / 5 W / 0.5 W
Channel 2
8 steps，1 W / 0.1 W / ……/ 10 nW
Channel 3
1 steps, 1 W
Channel 4
1 steps, 0.1 W
15 Protection
Short circuit & open circuit detection; Temperature limit protection.
16 Zone mode
5 temperature zones with independent PID and power range
17 Temperature ramp rate
0.1 K/min ~ 20 K/min
➨ Temperature Control Mode 2, output switch signal (external power source)
18 Temperature Control Channel
Quantity
Parameter
2 channels，Relay 1 & Relay 2
Maximum voltage: 30 V, maximum current: 5 A.
19 Connections
Power
Ports
The external power source powers the Kelvinion Ultra, which then powers the temperature control system.
20 Control Logic
Principle
Electrical Connection Diagram
Kelvinion Ultra disconnects the external power source from the heater when the temperature exceeds the target, and keeps it connected to continue heating when the temperature is below the target.
➨ Installation & Operation
21 Display
5.0-inch capacitive touch screen
22 Dimensions
2U standard chassis height
430 mm * 88.9 mm * 358 mm
23 Communication
Serial port，GPIB，LAN
24USB
USB Device Mode
Supports importing/exporting calibration curves, with 16 MB built-in storage
USB Host Mode
Supports importing/exporting calibration curves via an external USB drive.
Supports firmware upgrades via an external USB drive.
25 Protection
Short circuit & open circuit detection; Temperature limit protection
26 Power
100 – 240 V / 50 & 60 Hz input power range, up to 100 W.
27 Verification
CE, RoHS
Product Data
Down.List
Product Declarations
2D / 3D file
Kelvinion Manual
Consultation Purchase
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