Phone 800-517-8431

Fluke Calibration 2638A/05/C

22 Channel Hydra Series III Data Logger with Accredited Calibration

Brand: Fluke Calibration
Model No: 2638A/05/C
MPN: 4794979
Our Model No: 2638A05C
Condition: NEW
PDF Document Icon Data Sheet (1.25 MB)


Product Features:

  • DC accuracy of 0.0024%
  • Thermocouple accuracy of 0.5°C
  • 22 universal differential isolated inputs
  • On-screen color trend graphing and analysis
  • Easy-to-use menu system for setup and data management
  • Input types: ac V, dc V, ac I, dc I, thermocouple, PRT (2, 3, 4 w), thermistor, resistance (2-4 w), frequency
  • Multi-channel real-time data display
  • 6.5-digit bench DMM function for front-panel inputs
  • Monitor function for real-time viewing and charting between scans
  • 20 on-board math channels
  • One-button screen capture of chart or data displays
  • 45 channels/second basic DC scan rate
  • Internal 75,000 scan/setup file memory
  • USB flash drive support
  • Data security features
  • CAT II 300 V input safety rated
  • Supported by TQSoft and TQAero thermal validation software for enhanced data collection in regulated industries

Price-performance breakthrough in a stand-alone data acquisition system

The Fluke Calibration 2638A/05CC Hydra Series III continues the Hydra Series legacy of precision, multi-channel data acquisition. The Series III improves on Hydra’s industry leading thermocouple accuracy and adds a new dimension to how you collect and view data in a portable system.

DC measurement accuracy of 0.0024 %, basic 0.5 °C thermocouple accuracy, full-color display, easy-to-use menu system and industrial safety ratings put the 2638A05C in a category of its own as a precision data acquisition system. The dedicated 6.5 digit digital multimeter (DMM) mode provides additional utility and value.

The 2638A05C is a 22 channel true differential analog input data logger with the Fluke Calibration Universal Input Connector that lets you connect and disconnect any type of input to any channel, quickly and easily. Selectable inputs include dc voltage, ac voltage, resistance, thermocouple, RTD, thermistor, frequency and dc and ac current. You can also use the 2638A/05C with optional software and other Fluke Calibration data loggers to create a flexible, customized data acquisition system.

Accurate industrial thermocouple measurements

The 2638A/05CC incorporates the Fluke Calibration patented Universal Input Connector to bring more accuracy to thermocouple measurements than most other instruments in its class. The Universal Input Connector supports 14 common thermocouple types. Temperature-focused menu selections make the 2638A/05CC especially suitable for temperature validation applications. If you need to "zero" a large number of thermocouples to a known reference temperature before starting a temperature profiling or validation test, the 2638A/05CC will normalize all readings to your reference channel at the push of a button and store the offsets for reference in a supporting data file. If you are conducting chamber tests, heat treating tests under AMS guidelines, or validating temperature devices under 21 CFR regulations, Hydra Series III makes it that much easier to comply.

Universal Input Connector

The Universal Input Connector plugs into the slot in the 2638A/05C that contains a serviceable relay card. The Universal Input Connector has 22 input channels (20 universal inputs and 2 dedicated, low-burden input current channels). Each input connector contains a CJC (cold-junction compensation) device, which is calibrated at the factory. The calibration date and input connector serial number are programed into the input connector and are read by the 2638A/05C when installed. This information is saved in the test setup data file, which is available for review with any associated scan data from a test setup. This feature is a valuable form of traceability if you are working in a regulated industry.

Graphical color display with easy-to-use menus - Never get lost again in a complex menu tree while configuring channels or setting up a test. The large, full color, thin film diode (TFD) display enables the Hydra Series III to display comprehensive easy-to-understand data and easy menu navigation.

Back-lighted function keys quickly confirm the active menu selection. The "Record" key illuminates to indicate when the 2638A is recording data in scan, monitor or DMM mode. You always have visible confirmation when your data is being recorded.

Copy-and-paste channel functions make repetitive channel setups a simple task. Top-of-screen menu bar headings always let you know where you are in the setup process.

View your data with the push of a button. Page through all channel data and alarms in a quick view mode or scroll through channels and channel statistics individually. Statistics include rate of change, min, max, standard deviation, average, sample size and peak-to-peak information.

Real-time data charting with historical review - Chart the real-time data of up to four channels at once. Simply select your channels and view real time charts of your measurements. The chart will auto scale for best fit of the displayed values. Zoom in or out to view areas of interest with the push of a button. A history mode enables you to scroll through previously collected data within the scan file…all without a PC and expensive charting programs.

Screen capture function- With one key push on the front panel, you can capture the screen contents of the 2638A/05C directly to the USB drive in .jpg file format. Capture trend chart results or data displays for reports or just closer review.

Two alarms per channel - Each channel can be set for two alarm points: High-High, High-Low or Low-Low, in any combination. The 2638A/05C then compares the set points during each scan. An out-of-range value is reported on the main display and data files. You can also assign any alarm point to any of six TTL alarm outputs.

Math channels - Each channel measurement can be set to scale and record your measurement using mx+b gain and offset calculations that are available during your channel setup menu. In addition, each 2638A/05C mainframe has 20 internal math channels with alarm settings for more complex calculations that record results to your data file during each scan. Each channel result can be used as a variable in another math channel calculation.

DMM mode adds functionality and value - The Hydra Series III is based on a 6.5 digit (22-bit) precision digital multimeter measurement engine with exceptional measurement quality and resolution—so when you are not using your Hydra to collect multi-channel data, you can use it as a precision digital multimeter. Front-panel DMM-style input jacks and dedicated DMM menu selections enable you to measure dc voltage, dc resistance, ac voltage, ac resistance, Ohms, frequency, and temperature (thermocouples, RTDs and thermistors). Record DMM measurements to a separate DMM data file for later viewing. The 2638A/05C also displays measurement statistics and graphs measurements right on the main display.

USB and internal memory - The Hydra Series III features 20 MB on-board memory for storing over 75,000 data records and configuration files. In addition to this large on-board memory, a built-in USB port is available to collect and store large files up to 32 GB directly to a USB flash drive. An on-board file management menu makes moving data files or configuration files from internal or USB memory to your PC easy.

Memory management - The main panel memory key opens a simple menu for managing data files and setup files. If you want to load a previously saved setup file for a test, simply select your file from either internal memory or from a USB drive and you are ready to start scanning. You can easily move stored internal data to a USB for PC analysis or move setup files to another 2638A/05C. With Hydra Series III you have easy access to data without the need for a direct PC connection.

To help safeguard your test data in the case of a power outage, the 2638A/05C has a menu selection to resume scanning in the same configuration immediately when power is restored. It is just another way the 2638A/05C works with and protects your data.

Flexible triggers and resolution

To begin a scan, you have several options that can be set in your test setup menu:

  • External trigger
  • Remote SCPI command
  • Alarm trigger
  • Time interval trigger
  • Manual trigger initiated from the front panel

Measurement resolution is at your control with the 2638A/05C. You can choose between standard settings of Fast, Medium or Slow (4.5, 5.5, 6.5 digits) for the resolution you need. You can also select custom measurement speeds on individual channels to get the accuracy and resolution to suit your requirements.

Totalizer - A totalizer input located on the rear panel provides a simple counter that records to the data file on every scan. The totalizer count can accumulate up to 1,048,575 counts and be reset from the front panel or remote command.

Channel statistics - Each channel’s measurement statistics can be viewed at any time. During scanning, monitoring or in DMM mode, you have rate-of-change (per minute and per second), standard deviation, minimum, maximum, peak-to-peak, and average—all available at the touch of a button.

Connectivity - USB (virtual serial port) and LAN interface connections are available for easy connection to your company network or direct to you PC. Use optional Fluke Calibration DAQ application software for the 2638A Series or develop your own interface with the standard SCPI command set, or use our Lab View driver or Indusoft Web Studio to support your specific application needs.

Category II international safety ratings - The Hydra Series III is the only general purpose portable data acquisition system with an IEC Category II safety rating to help protect you and your operators when making real-world measurements on machinery in industrial areas. Other data loggers that are not clearly rated for these types of category measurements should be reviewed before being used for industrial measurement. Fluke Calibration takes your safety and your measurements seriously.

Calibration - The 2638A/05C comes with a Fluke Calibration statement of manufacturing calibration practices. Accredited calibration certificates are available when specified at the time of order.

Calibration of the 2638A/05C is straightforward and only requires a password to access the calibration menu from the front panel. The 2638A/05C can be calibrated manually following the internal menu or by using automated procedures with Fluke Calibration Calibration MET/CAL® Calibration Management Software.

Built-in relay maintenance counter - The key to the isolation and accuracy of the 2638A in part comes from the use of high-quality switching relays inside the unit. Because these relays do deteriorate with extended use, the 2638A has a maximum relay counter for each installed relay board. This will assist a user in anticipating when replacing the relay board may be advisable.

  • 1 - Installed relay board (2638A-RLY)
  • 1 - Installed Universal Input Connector (2638A-100)
  • 1 - Set of Test leads
  • 1 - Product manual
  • 1 - Evaluation copy of 2680A-APSW software on CD
  • 1 - Power cord
  • 1 - Screwdriver
  • 1 - Statement of calibration practices
Model Description Buy Now Price
2638A-100 Fluke Calibration 2638A-100 Extra Universal Input Module for the 2638A/05 Add to Cart
Sale $166.50
2638A-RLY Fluke Calibration 2638A-RLY Extra Relay Board, Replacement Add to Cart


Y2638S Fluke Calibration Y2638S Rack Mount Kit, Single (Half Rack) Add to Cart
Sale $175.50
Y2638D Fluke Calibration Y2638D Rack Mount Kit, Dual (Full Rack) Add to Cart
Sale $202.50
2638A-101 Fluke Calibration 2638A-101 10 Ohm Shunt Resistor Set, 100 mA Max, Quantity - 10ea Add to Cart
Sale $49.50
2638A-1GB Fluke Calibration 2638A-1GB 1 GB Flash Drive for the 2638A Data Logger Add to Cart
Sale $58.50
2680A-APSW Fluke Calibration 2680A-APSW FlukeDAQ Control Software V6.0 Add to Cart
Sale $585.00
Fluke Calibration 28368A Introduction
Fluke Calibration 28368A Introduction
2638A Hydra Series III Data Acquisition System Universal Input Module
2638A Hydra Series III Data Acquisition System Universal Input Module
2638A Hydra Series III Data Acquisition System Intro and Test Setup
2638A Hydra Series III Data Acquisition System
Intro and Test Setup
2638A Hydra Series III Data Acquisition System Running a test, viewing and saving data
2638A Hydra Series III Data Acquisition System
Running a test, viewing and saving data
Data Sheet: PDF Document Icon (1.25 MB)
Manual: PDF Document Icon (6.15 MB)
Brochure: PDF Document Icon (3.18 MB)
↑ Back to Top