CR3000
CR3000
RetiredMeasurement and Control Datalogger
No longer available to order
This product is retained for service, documentation, and compatibility information.
- Model:
- CR3000
- Item Number:
- 17852
- Warranty:
- 3 years
Overview
The CR3000 Micrologger® supports complex applications with many sensors. It is fast and powerful enough to handle extended eddy-covariance systems with full energy-balance systems. Multiple CR3000s can be configured as a network or units can be deployed individually.
Designed for stand-alone operation in harsh, remote environments. The CR3000 consists of a compact, integrated package with a built-in power supply, a 128-by-64-pixel backlit graphical or eight-line numeric display, and a 16-character keyboard.
Key Advantages
Supports complex installations, built-in keyboard and display
Technical Description
Housed in a portable, self-contained package, the CR3000 Micrologger® consists of measurement and control electronics, communication ports, 16-character keyboard, display, power supply, and carrying handle. The integrated display shows 8 lines x 21 characters (64 x 128 pixels).
The CR3000 has a choice of three power-supply base options (alkaline, rechargeable, or no battery). Low power consumption allows the Micrologger® to operate for extended time periods on its battery recharged with a solar panel—eliminating the need for AC power. It suspends execution when primary power drops below 9.6 V, reducing the possibility of inaccurate measurements.
The on-board operating system includes measurement, processing, and output instructions for programming the data logger. The programming language, CRBasic, uses a BASIC-like syntax. Measurement instructions specific to bridge configurations, voltage outputs, thermocouples, and pulse/frequency signals are included. Processing instructions support algebraic, statistical, and transcendental functions for on-site processing. Output instructions process data over time and control external devices.
Benefits
- Ideal applications include eddy covariance, wind profiling, HVAC, weather stations, vehicle testing, air quality, process control, mesonet systems, agriculture, soil moisture, time-domain reflectometry, water quality
- Integrated keyboard and display screen let you program, manually initiate data transfers, and view data, all on site.
- Includes a current excitation channel allowing direct connection of PRTs or other sensors that use a current excitation
- Serial communications with serial sensors and devices supported via I/O port pairs
- Supports PakBus, Modbus, SDI-12, and DNP3 protocols
- Communicates via various options: TCP/IP, email, FTP, web server.
- Gas Discharge Tube (GDT) protected inputs
- Flexible power and communication options make it ideal for remote locations.
- Compatible with channel expansion peripherals allowing you to expand your system
- Battery-backed clock that ensures accurate time is maintained while data logger is disconnected from battery power
- Contains custom ASIC chip that expands pulse count, control port, and serial communications capabilities
- Program with LoggerNet, PC400, or Short Cut to fit your setup
- Collects and stores data and controls peripherals as the brain of your system
Specifications
- -NOTE-
- Note: Additional specifications are listed in the CR3000 Specifications Sheet.
- Operating Temperature Range
- Battery bases have different temperature ranges.
The rechargeable base option has an operating temperature range of -40° to +60°C. The alkaline base option has a temperature range of -25° to +50°C.
-25° to +50°C(standard)
-40° to +85°C(extended)
Non-condensing environment - Maximum Scan Rate
- 100 Hz
- Analog Inputs
- 28 single-ended or 14 differential
(individually configured)
- Pulse Counters
- 4
- Voltage Excitation Terminals
- 4
(VX1 to VX4)
- Communications Ports
- CS I/ORS-232Parallel peripheral
- Switched 12 Volt
- 2 terminals
- Digital I/O
- Certain digital ports can be used to count switch closures.3 SDM and 8 I/Os or 4 RS-232 COM
I/O ports can be paired as transmit and receive for measuring smart serial sensors. - Input Limits
- ±5 Vdc
- Analog Voltage Accuracy
- ±(0.04% of reading + offset)
at 0° to 40°C
- ADC
- 16-bit
- Power Requirements
- 10 to 16 Vdc
- Real-Time Clock Accuracy
- ±3 min. per year
(Correction via GPS optional.)
- Internet Protocols
- FTP, HTTP, XML POP3, SMTP, Telnet, NTCIP, NTP,
- Communication Protocols
- PakBus, Modbus, DNP3, SDI-12, SDM
- Idle Current Drain, Average
- 2 mA
(@ 12 Vdc)
- Active Current Drain, Average
- 3 mA
(1 Hz sample rate @ 12 Vdc without RS-232 communication)
10 mA(100 Hz sample rate @ 12 Vdc without RS-232 communication)
38 mA(100 Hz sample rate @ 12 Vdc with RS-232 communication)
- Dimensions
- 24.1 x 17.8 x 7.6 cm
(9.5 x 7.0 x 3.0 in.) with low-profile base
24.1 x 17.8 x 11.9 cm(9.5 x 7.0 x 4.7 in.) with rechargeable battery base
24.1 x 17.8 x 11.9 cm(9.5 x 7.0 x 4.7 in.) with alkaline battery base
- Weight
- 1.6 kg
(3.6 lb) with low-profile base
3.8 kg(8.3 lb) with alkaline battery base
4.8 kg(10.7 lb) with rechargeable battery base
Common Accessories
(6)DCDC18R
12 to 18 Vdc Boost Regulator
The DCDC18R Boost Regulator accepts an 11 to 16 Vdc input and boosts it to 18 Vdc, which allows automotive supply voltages to recharge the CR3000's sealed rechargeable battery.
Orderable17394
Converter, USB to DB9 Pin (Male) RS-232
The 17394 interface cable provides a USB connector on one end and a 9-pin male RS-232 connector on the other end. The USB connector attaches to the USB port on a PC, and the RS-232 connector attaches to the RS-232 port on the CR3000.
OrderableSC110
Two Cables, RS-232 to Data Logger Control Port
The SC110 consists of two cables. One end of both cables provides stripped, tinned leads for attachment to the data logger control ports. On the other end, one of the cables is fitted with a 9-pin male connector, and the other cable is fitted with a 9-pin female connector. By having two cables, connection to either an RS-232 DCE or DTE device is supported depending on the cable used.
OrderableSP10
10 W Solar Panel
The SP10 recharges the sealed rechargeable batteries using solar power. It provides a 10 W maximum peak power, 9 W guaranteed minimum power, 0.59 A current at peak, and 16.8 V voltage at peak.
OrderableSP20
20 W Solar Panel
The SP20 recharges the sealed rechargeable batteries using solar power. It provides a 20 W maximum peak power, 18 W guaranteed minimum peak power, 1.19 A current at peak, and 16.8 V voltage at peak.
Orderable39177
1.67 A 24 Vdc Power Supply
The 39177 converts 100 to 240 Vac to a regulated 24 Vdc. The 39177 comes standard with a USA/Canada plug, with an option to add a kit for international use. On one end, the 39177 has a plug that inserts into a wall socket. There are several cable termination options for the other end of the cable.
Orderable
Replacement Parts
(15)42816
1/2-Unit Desiccant Bags (quantity of 10)
The 42816 desiccant is used to desiccate small subassemblies. For example, the KH20 Krypton Hygrometer and the base of the CR3000 Measurement and Control Datalogger each require two bags. Multi-packs are recommended for customers who need to desiccate multiple enclosures or systems.
Orderable3768
2-Pin Screw Terminal Plug Connector
This green, plug-in power connector is shipped attached to the face of the CR3000 when the low-profile base is ordered. The 3768 provides screw terminals for connecting the 12 V and GND wires of the power supply. Please note that the power connector for the rechargeable base is the 7843 (see below).
Orderable7843
Green 2-Pin Screw Terminal Plug Connector with Threaded Flange
This 2-pin, detachable, power supply connector (green) is supplied with the rechargeable base of the CR3000. The 7843 can be purchased to replace a lost or damaged connector.
Orderable18173
Replacement CR3000 Excitation and Pulse Connector
This green terminal strip provides connectors for the excitation and pulse channels. The 18173 may be purchased to have a spare terminal strip or as a replacement item if the strip has been lost or damaged.
Orderable18172
Replacement CR3000 Analog Input 8-14 Connector
This green terminal strip provides connectors for the analog input channels labeled 8 through 14. The 18172 may be purchased to have a spare terminal strip or as a replacement item if the strip has been lost or damaged.
Orderable18171
Replacement CR3000 Analog Input 1-7 Connector
This green terminal strip provides connectors for the analog input channels labeled 1 through 7. The 18171 may be purchased to have a spare terminal strip or as a replacement item if the strip has been lost or damaged.
Orderable18170
Replacement CR3000 Control and Power Connector
This green terminal strip provides the connectors for the control and power channels. The 18170 may be purchased to have a spare terminal strip or as a replacement item if the strip has been lost or damaged.
Orderable17315
Peripheral Port Cover for the CR1000 or CR3000
The 17315 may be purchased to replace a lost or damaged cover. It sits on the peripheral port to protect it.
Orderable13519
Replacement Lithium Battery
This 3.6 V lithium battery powers the clock and SRAM when the primary 12 Vdc power supply is not connected. The 13519 needs to be periodically replaced.
Orderable42900
Battery and Desiccant Kit for the CR800-Series and CR1000 Dataloggers
The 42900 kit provides a replacement battery and desiccant for the CR800-series and CR1000 dataloggers. The kit consists of a single 0.16-unit silica desiccant bag and a 3.6 V 1.2 Ah lithium AA battery. When shipped, the data logger has one bag of this desiccant inside it. While the supplied desiccant should fill the initial needs of most applications, it should be periodically replaced. Campbell Scientific recommends replacing this desiccant when the data logger's internal lithium battery is replaced.
Orderable10645
Screw #10-32 x .312 Pan Slot, Brass
The 10645 is the screw used in the ground lug.
Orderable8219
6 V 7 Ah Lead Acid Battery
The 8219 provides one of the 6-Vdc, 7-Ahr sealed rechargeable batteries used in the rechargeable base. To supply 12 Vdc, two 8219 batteries must be wired in series. Customers can generally replace these batteries.
Orderable3315
Type T Thermocouple
This type T, 5 in. thermocouple is attached to a differential channel on several of our data logger wiring panels when the data logger is shipped. A 3315 may be ordered to replace a thermocouple that has become lost or damaged.
Orderable10873
Serial Data Cable, 9-Pin Socket (Female) to 9-Pin Pin (Male)
The 10873 is a serial cable that is useful for connecting the RS-232 port of the data logger to the 9-pin RS-232 port of a computer. The cable is six feet long.
Orderable8125
Flat-Bladed Screwdriver, 2.5 mm Blade x 50 mm Shaft
The 8125 is a small, flat-bladed screwdriver that is extremely useful for opening the guillotine terminals on our data loggers and measurement control devices.
Orderable
Services
(3)18542
CR3000 Extended Temperature Test (-40° to +85°C)
Testing is available only for individual units that have previously passed Extended Temperature Testing. Testing also requires concurrent purchase of calibration. An RMA (Return Material Authorization) from Campbell Scientific is required.
Orderable18547
CR3000 Calibration with Data (-25° to +50°C)
The 18547 requires an RMA (Return Material Authorization) from Campbell Scientific. When ordered, the CR3000 is calibrated to meet original specifications. Calibration includes standard temperature testing (-25° to +50°C). Before and after calibration sheets are supplied with the data logger. The calibration price assumes return of a fully functional data logger; charges for all repairs will be added to the invoice.
Orderable34153
CR3000 Calibration over Temperature and ISO/IEC 17025 Calibration Verification with Certificate
The 34153 provides factory calibration of the CR3000 to meet original specifications, then sends the calibrated data logger to be verified by a certifying body that is accredited to the ISO 17025 standards.
Orderable
This service requires an RMA (Return Material Authorization) from Campbell Scientific. The factory calibration includes comprehensive testing of all data logger functions over its standard temperature range (-25° to +50°C) and the replacement of the internal lithium battery and desiccant packs. During testing, the data logger’s operating system is updated, and all settings are restored to factory defaults unless otherwise requested. Upon completion of the factory calibration, the data logger is sent to the ISO 17025 accredited certifying body referenced above for calibration verification.
Compatibility
Sensors
With several channel types, the CR3000 is compatible with nearly every available sensor, including thermocouples, SDI-12 sensors, and 4 to 20 mA sensors. A custom ASIC chip expands its pulse count, control port, and serial communications capabilities. The CR3000's I/O ports can be paired as transmit and receive, allowing serial communications with serial sensors and devices.
The CR3000 is compatible with all of our CDMs (requires an SC-CPI), SDMs, multiplexers, vibrating-wire interfaces, terminal input modules, and relays.
Communications
The CR3000 communicates with a PC via direct connect, Ethernet interfaces, multidrop modems, short-haul modems, phone modems (land line, digital cellular, and voice-synthesized), RF telemetry, and satellite transmitters (Argos, Iridium, and Inmarsat).
Data can be viewed on its onboard keyboard display, user-supplied iOS or Android device (requires LoggerLink), CD295 DataView II Display, or a user-supplied PDA (PConnect or PConnectCE software required).
Compatible external data storage devices are the CFM100, NL115, and SC115.
Enclosures
The CR3000 can be housed in an ENC12/14, ENC14/16, ENC16/18, ENC24/30, or ENC24/30S enclosure.
Power Supplies
The CR3000 is typically powered by its on-board alkaline or rechargeable power supply (see Ordering Info). When the rechargeable power supply is used, its internal 7 A h sealed rechargeable battery needs be charged via a vehicle (requires the DCDC18R), solar panel, or ac wall charger.
The CR3000 can also come with a low-profile base that requires a user-supplied dc source. It is preferred when the system’s power consumption needs a larger capacity battery or when it’s advantageous for the Micrologger® to be thinner and lighter.
Software
CRBasic, the CR3000's full programming language, supports simple or complex programming and many on-board data reduction processes.
Compatible Products
(4)Related Resources
Case Studies

Italy: CS725 SWE Sensor Field Test
Tellinod (Municipality of Torgnon), northwest Italy
February 17, 2016
View
New Mexico: SCADA System
Replacing an existing SCADA system
Albuquerque, New Mexico, USA
May 4, 2017
View
Australia: Ecological Research
Long-term ecological studies in wet eucalyptus forest
Warra LTER site, Tasmania, Australia
December 12, 2016
View
Ontario: Green Roofs
Monitoring conditions to test and evaluate the construction standards of green roofs
Toronto, Ontario, Canada
July 15, 2015
View
Showing 4 of 21 results
See all Case StudiesDocuments
- Technical Paper
Data Streaming
July 2023
View Document - Technical Paper
Benefits of Input Reversal and Excitation Reversal for Voltage Measurements
January 2001
View Document - Document
CR3000 Discontinuation Notice
September 2021
View Document - Technical Paper
Voltage Measurement Accuracy, Self-Calibration, and Ratiometric Measurements
January 2001
View Document
Showing 4 of 19 results
See all DocumentsDownloads
- CR3000 OSv32.07Login required
May 15, 2024
OS and FirmwareExecution of this download installs the CR3000 Operating System and Compiler on your computer. It also updates the CR3000 support files for the CRBasic Editor. Note: The Device Configuration Utility is used to upload the included operating system to the datalogger. Upgrading from versions prior to version 28 of the Operating System will reset the datalogger’s CPU drive. This is due to a change in the format of the file system from FAT16 to FAT32. In order for the datalogger to operate correctly, as part of the upgrade, the CPU drive is formatted to FAT32. Any programs stored and running from the CPU drive will be lost. It is not recommended to update the datalogger’s Operating System over a remote connection where program control regulates the communication equipment (turning it on or off, etc.). In these cases, an on-site visit and a backup using DevConfig’s backup utility is necessary to update the datalogger’s Operating System. Watch the Video Tutorial: Sending an OS to a Local Datalogger. In all cases where the datalogger is being updated from an Operating System prior to 28, the use of DevConfig’s backup utility is recommended due to the CPU drive being formatted using the new FAT32 format.
- Device Configuration Utilityv2.36Login required
June 22, 2026
Software ApplicationsA software utility used to download operating systems and set up Campbell Scientific hardware. Also will update PakBus Graph and the Network Planner if they have been installed previously by another Campbell Scientific software package. Supported Operating Systems: Windows 11 or 10 (Both 32 and 64 bit)
Videos and Tutorials

LoggerLink Software | An Introduction
January 29, 2013 (12:11)
A mobile app for iOS and Android
Watch
LoggerNet Software | Network Planner
April 16, 2013 (4:05)
Designing a PakBus™ network using the Network Planner tool in LoggerNet
Watch
SDI-12 Sensors | Transparent Mode
November 27, 2013 (7:06)
Communicating with an SDI-12 sensor
Watch
SDI-12 Sensors | Watch or Sniffer Mode
November 27, 2013 (3:20)
Watching communication between an SDI-12 sensor and a datalogger
Watch
Showing 4 of 42 results
See all Videos and TutorialsPress Releases
Services Available
- Repair
- Yes
- Calibration
- Yes
- Free Support
- Yes