Thermal/Multi-Function Data Logger – 51101

51101 Thermal/Multi-Function Data Logger


Key Features

  • Datasheet
  • Models with 1, 8, and 64 channels on-line data recording. Multi-sets linked to a PC for hundreds of channels are doable
  • Supports 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℃, error down to (0.01% of reading+0.3℃)
  • 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


It 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 recorded channels can range from one to several hundred. 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℃ accuracy and 0.01℃ resolution*, while most data loggers in the market are at 1℃ accuracy and 0.1℃ 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 simply malfunction, or are even damaged in those cases. Chroma loggers use a parallel architecture for data retrieval, while most of our competitors use a sequential multiplexing method. This means data rate per channel is quick and constant for Chroma loggers, while others become much slower as more channels are used.

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.

1000VDC Channel to Channel Isolation

Chroma's 51101 thermal data logger channel isolation illustration

In developing or qualifying some electronic devices, tracking records of temperatures/voltages/currents is required. In many cases there can be high voltage differences between measured points. A switching power supply, for example, is required to measure the primary side voltage/current, secondary side voltage/current, and key component temperatures. Unfortunately, many data loggers including some leading brands are incapable of handling such a high voltage difference between both sides. A difference of a few hundred volts can mess up their measurement entirely, or even kill their loggers.

Chroma thermal/multifunction data loggers are perfect for the measurements in a situation with charge and high voltage difference. The feature of 1000VDC channel to channel isolation makes them immune to voltage difference between any two channels. One just attaches thermal couples or wires on the device or conducting pads and gets accurate data.

Another case can be battery system tests. One needs to know the voltage and temperature of each cell. For other data loggers, often the voltages cannot be measured properly in the cascade configuration. The thermal couple attachment is another issue needing special care. All these problems are easily solved using Chroma thermal/multifunction data loggers for the high channel to channel isolation.


0.3℃ Accuracy and 0.01℃ Resolution

Chroma thermal/multi-function data loggers offer higher accuracy and better resolution than our competitors at a comparable, or lower price point. Most data loggers are at 1℃ accuracy and 0.1℃ resolution. Chroma data loggers are 1 order better. Higher accuracy and more detail is always better for measurements.

In order to achieve such high accuracy and resolution, Chroma implements individual CJC for each channel. High bit-count A-to-D converters and an advanced noise suppression circuit makes for outstanding performance in our data loggers. Our customers get better specifications without paying more.

Precise temperatures can be critical in thermal conductivity measurements, chemical processes, and biologic experiments. Testing a heat pipe, for example, often requires resolving <1℃ temperature difference between evaporation and condensing zones. Some liquid crystals can change their properties drastically with a very small temperature variation at critical temperatures.


Constant Data Rate Per Channel

Most of data loggers in the market use a multiplexing circuit structure. All channels share a bandwidth which means the more active channels, the slower data rate per channel will be. Chroma data loggers use a parallel data retrieving circuit structure. No matter how many channels are active, the data rate can be as fast as 5 samples per second per channel.

Chroma's 51101 thermal data logger constant data rate illustration

The benefit of constant data rate can be profound for recording large number of channels. For tens of channels, total data bandwidth of Chroma data logger can be several times larger than that of other data loggers. Some other data loggers can become too slow and lose details. They can miss recording critical changes happen in a short time. Chroma data loggers greatly reduce this possibility.

Model Description
51101-1 Data Logger – 1CH
51101-8 Data Logger – 8CH
51101-64 Data Logger – 64CH
A511000 Voltage Adapter VA-480
A511001 Current Adapter IA-3
A511002 Voltage Adapter VA-10
A511003 8-Port Sensor Card
G12 000207 Filler Panel for empty A511003

User Manuals

Manuals - 51101 Thermal/Multi-Function Data Logger

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User Manuals for 51101 Thermal/Multi-Function Data Logger. Available documents are: Hardware User Manual, 51101-1 Hardware User Manual, 51101-8 Hardware User Manual, 51101-64 All files in PDF format. ...


Battery Test Solutions

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Brochure outlining Chroma battery testing solutions. Chroma satisfies battery test requirements such as charge rate, discharge rate, state of charge (SOC), and state of health (SOH), and depth of discharge...

Application Notes

What's Changing In Appliance Hipot Testing And Why

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This application note provides information on changes in appliance hipot testing procedures. ...

    How To Buy

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    Lead time

    Most of our instruments are inventoried and ready to ship. If we are currently out of stock – and due to demand we can be - lead times are typically 4-8 weeks depending on the instrument’s power rating.
















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