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51101/51101C Series Thermal/Multi-Function Data Logger
Model 51101/51101C series Thermal/Multi-Function Data Logger
Key Features
  • Models with 1, 8, and 64 channels on-line data recording. Multi-sets linked to a PC for hundreds of channels are doable
  • Support B, E, J, K, N, R, S, and T type thermal couples with ITS-90 defined temperature range
  • Individual channel cold junction compensation withTemperature resolution up to 0.01˚C, error down to (0.01% of reading+0.3˚C)
  • Voltage full range ±480VDC, ±10VDC; resolution 1mV, 10uV; error down to (0.1% of reading+1mV), (0.015% of reading+100uV)
  • 1000VDC channel to channel isolation, full protection for testing points with charge and guarantee for accurate measurements
  • Thermal couple open circuit detection
  • PC-based operation with powerful software for recording and analyzing data
  • 1 and 8 channel models are USB powered. No battery or external power supply is required

Data Sheet

  • Product Details
  • Specifications
  • Related Products
  • Request More Information
Product Details

51101 ApplicationIt is a general requirement to record temperatures, voltages, currents, and many physics quantities during research, product development, productions, and quality assurance processes. The number of record channels can be a simple one to several complicated set of hundreds. Thermal/multi-function data loggers are prefect solutions to serve for these measurement and tracking needs.

There are several measurement products in the market to perform such a largescale and extensive time varying recording. Some are expensive, some are limited in accuracy or resolution, and some have low immunity to interference. Chroma thermal/multi-function data loggers are by far the most cost-effective solutions for versatility, accuracy, stability, and interference immunity among this category.

Chroma thermal/multi-function data loggers measure temperatures, voltages, and currents with high accuracy and resolutions. For example, they support 8 types of thermal couples measurement with ITS-90 defined temperature range at 0.3˚C accuracy and 0.01˚C resolution*, while most data loggers in the market are at 1 ˚C accuracy and 0.1˚C resolution*. Chroma loggers are with 1000VDC channel to channel isolation, which means they can attach thermal couples to objects with high electricity, such as batteries, solar cells, working PCB, etc., and still get correct data. Many competitors are just malfunctioned or even damaged in those cases. Data retrieve in Chroma loggers are in a parallel architecture, while most of competitors use a sequential multiplexing method. This means data rate per channel is quick and constant for Chroma loggers, while others become much slower when number of channels is bigger.

Using Chroma thermal/multi-function data loggers, customers get confidence in measured data and high performance/cost ratio. Most of all, we can help in certain cases that our competitors fail, and only Chroma succeeds.





*Thermal couple error excluded. Please see specification list for detail.

Model 51101-1
Thermal Coupler
Thermocouple T-type -200 to 400˚C 51101 Series : ±(0.01% of reading +0.3) ˚C *1
51101C Series : ±(0.01% of reading +0.8) ˚C *1
Thermocouple K-type -200 to 1372˚C
Thermocouple B-type 250 to 1820˚C
Thermocouple E-type -200 to 1000˚C
Thermocouple J-type -210 to 1200˚C
Thermocouple N-type -200 to 1300˚C
Thermocouple S-type -50 to 1760˚C
Thermocouple R-type -50 to 1760˚C
Thermocouple Jacks B, E, J, K, N, R, S, or T mini-type
Thermocouple Connector B, E, J, K, N, R, S, or T mini-type
Temperature Reading
Number of Inputs 1 8 8, 16, 24, 32, 40, 48, 56, 64 channel
Temperature Sensor Type Thermocouple : B, E, J, K, N, R, S, T
Temperature Scale ITS-90
Temperature Resolution ±0.01 ˚C
Temperature Accuracy *1*2 51101 Series : ±(0.01% of reading +0.3) ˚C
51101C Series : ±(0.01% of reading +0.8) ˚C
CJC Error ±0.3 ˚C
Maximum Sample Rate 5 sample/sec.
Channel to Channel Isolation 1000VDC / 750 Vrms
Input Resistance 5MΩ
Thermocouple break detection current 100 nA
Number of Inputs 1 8 8, 16, 24, 32, 40, 48, 56, 64 channel
Digital I/O
Number of Digital I/O -- -- 4 differential digital inputs and outputs
Digital Input -- -- 1 trigger input (DI0) and 3 general purpose inputs
Digital Input- High Input Voltage -- -- 3 ~ 30 V
Digital Input- Low Input Voltage -- -- < 0.8 V
Digital Input- High Input Current -- -- 0.8 ~ 13.1 mA
Digital Input- Low Input Current -- -- <10μA
Digital Input- Terminal Resistor -- -- 2.2KΩ
Digital Output Configuration -- -- Transistor switch
Digital Output- External Supply Voltage -- -- < 30 V
Digital Output- ON-state Voltage -- -- < 1.5 V
Digital Output- ON-state Current -- -- < 400 mA
Digital Output- OFF-state Current -- -- < 2.1μA
Digital Output- Power Dissipation per Output -- -- < 0.6 W
Isolation Voltage     ± 250 V
RS-232 -- -- Half Duplex, DB-9 female connector
USB USB2.0 (full speed device) ;
USB A-type connector
USB2.0 (full speed device) ;
USB B-type connector
LAN (Option) -- -- Ethernet (10BASE-T/100BASE-TX) ;
Power Specifications
Power Requirement 4.5~5.5 V 11.4~12.6 V
Maximum Power Consumption 0.22W 1.2W 18 W
Physical Specifications
Dimensions (WxDxH) 96 x 29 x 14.5mm 135.3 x 186 x 51.7 mm 277 x 200.7 x 233 mm
Weight for Main Frame 30g 1.2 Kg 2.4 Kg
Weight per Sensor Card -- -- 0.15 Kg
Weight (Main Frame + 8 Sensor Card) -- -- 3.6 Kg
Environmental Specifications
Operating Temperature *1*2 0~50˚C
Humidity < 80 %RH
Power Adaptor Input Voltage -- -- 90 to 260 VAC
Power Adaptor Input Frequency -- -- 47 to 63 Hz
Main Frame DC Input -- -- 12.6 V/1.5 A
Thermocouple Differential Input Voltage ±2.5 V ±2.5 V ±5 V
External Digital Input/Output Voltage -- -- 30 V
External Digital Output Current -- -- 400 mA
Operating Temperature 0~50˚C
Storage Temperature 20~60˚C
Storage Humidity 80 %RH


Voltage Reading
Voltage Input Type VA-480 Voltage Adaptor VA-10 Voltage Adaptor
Voltage Resolution 1mV 10uV
Voltage Input Range ±480VDC ±10VDC
Voltage Input Accuracy ±(0.1% of reading + 1mV)*3 ±(0.015% of reading + 100uV)*3
Input Resistance 1MΩ


Current Reading
Current Input Type IA-3 Current Adaptor
Current Resolution 1mA
Current Input Range ±3A
Current Input Accuracy ±(1% of reading + 1mA)

Note *1 : The accuracy spec is defined as the operating temperature range from 20˚C to 30˚C, the uncertainty of thermal coupler itself is not included
Note *2 : For operating temperature out of range from 20˚C to 30˚C, additional error (0.01% of reading + 0.03˚C) / ˚C for that out of operating temperate should be added
Note *3 : Under MV_8 filtering mode

All specifications are subject to change without notice.

Related Products
Model Description
51101-1 Thermal/Multi-Function Data Logger - 1 channel
51101C-1 Thermal/Multi-Function Data Logger - 1 channel
51101-8 Thermal/Multi-Function Data Logger - 8 channel
51101C-8 Thermal/Multi-Function Data Logger - 8 channel
51101-64 Thermal/Multi-Function Data Logger - 64 channel
51101C-64 Thermal/Multi-Function Data Logger - 64 channel
A511000 VA-480 Voltage Adaptor (option)
A511001 IA-3 Current Adaptor (option)
A511002 VA-10 Voltage Adaptor (option)
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