UK Supplier of Data Acquisition & Thermal Imaging systems, software and services

Expert Logger

Manufacturer: Delphin Technology AG


Expert Logger is Delphin‘s new generation of data loggers. It combines the latest communication technology with advanced measurement technology, and is based on FPGA technology to make it especially powerful. It can process up to 46 analog input channels at both low and high rates of sampling. Measurement data can be accurately acquired, independently stored and transmitted to the internet or a PC for evaluation via USB, LAN, WLAN or LTE.

Expert Logger is available in three versions which differ only in the number of analog and digital inputs they can pro- cess. All Expert Logger devices are equipped with internal 4 GB memories that can independently store up to 125 million measurement values with date and time stamps to msec precision. Storage capacity can be extended as required via external USB or LAN storage devices (NAS). An integrated, energy-saving “sleep function” automatically switches off the device during breaks in measurement acquisition. The Expert Logger operates with standard batteries, rechargeable batteries or solar units.

Precision measurement is ensured through the use of a 24-bit converter. Voltages can also be precision recorded to the µV range. All channels are galvanically isolated to suppress earthing loops and the tried and tested input circuitry protects the device against voltage spikes. Electromechanical components are avoided (relays multiplexer), and the device operates noise and maintenance free. Delphin‘s patented analog inputs guarantee years of reliable measuring work.


Applications Temperature Monitoring

Sensor connection

  • Universal analog inputs (mV mA, TC, RTD)
  • Digital inputs and outputs
  • Plug-in screw terminals

Serial and SDI12 interfaces

  • SDI12 interfaces for environmental sensors
  • Serial RS232 ports and a RS485
  • Configuration of individual ASCII protocols

Battery and rechargeable operation

  • Independent operation possible with batteries or rechargeables
  • Minimal energy consumption via a sleep function
  • User-defined wake and measuring intervals

Internal data storage

  • 4 GB of internal data storage for up to 125 million measurement values
  • Time stamps to msec resolution
  • Data read out via LAN, WLAN or USB interface

External data storage

  • Data recorded to external storage media (USB, NAS)
  • PUSH function to send measurement data to the internet
  • Event-triggered recording with pre and post histories

Remote monitoring

  • WLAN link to PCs and mobile devices
  • Optional LTE / UMTS / 4G integrated modem
  • Automatic notification via email or text messaging

PC and field bus interfaces

  • LAN and USB interface to a PC or network
  • CAN-Bus interface for reading / writing identifiers
  • Field bus interfaces PROFIBUS DP, Modbus

Monitoring functions

  • Monitoring and data logging in a single device
  • Limit value setting for any sensor signal or calculation channel
  • Controlling digital outputs with user-defined triggering
  • Logging of pictures from webcam by external trigger

Signal processing

  • Averaging (middle, min, max, RMS values)
  • Integration of time signals into volumes, masses or working values
  • Computational functions (basic functions, polynomial, trigonometric ...)

ProfiSignal Go - Measurement data analysis

ProfiSignal Go enables users to portray measurement data online and offline and to carry out detailed analysis. The software can portray the Expert Logger‘s measurement data in trends. Users can choose between y(t) or y(x) diagrams as well as a range of other analysis diagrams. ProfiSignal Go is especially intuitive to make it highly user friendly.

Operation made simple

Sensors are connected via plug-in screw terminals and a chart clearly shows how channels are arranged. Users always have a good overview of the channels despite their high density. Each set of four terminals can be configured as two differential inputs to measure voltage, currents, thermocouples, or to take measurements from a 4-wire RTD.

Configuration made simple

The Expert Logger is simple to configure from a PC. These settings remain stored within the Expert Logger even when disconnected from the power supply. The device set- tings can also be read out and stored on a PC and analysed offline without the need for a connected Expert Logger. The offline configuration settings are then simply read into the device when connected. The software used for configuration is simple to operate to let users fully focus on their measurement tasks.

Intelligent signal processing

Signal processing using internal software channels significantly simplifies measurement tasks. Flexible calculation channels enable measurement data to undergo further computation and recording. Integrators directly calculate volumes or quantities from time related measurement data such as mass and discharge flow rates. Limit values can monitor measurement data and be used to switch digital outputs or automatically send emails. Complex signal processing is possible using pulse counters, stop-clock functions and operating-hours counter. Averages can be calculated and recorded as time-weighted or moving. The Expert Logger‘s software channels clearly set it apart from other loggers and make it very popular among users.

Touch display

The touch display enables users to configure the Expert Logger‘s basic settings such as the IP address and network mask. The display also simultaneously shows selected measurement data. The display operates via either touch or an external USB mouse.

Expert Logger Touch Panel


 Expert Logger
Device Type100200300
Analog Inputs (mV, mA, TC)163246
Appropriate for RTD's(8)(16)(23)
Sampling rate per channel1/3Hz to 1000Hz
Voltage / current measurement range±156mV - ±10V / 0 - 20mA / 4 - 20mA 
Current reference for resistance measurementNone, 100µA, 200µA, or 1mA software selectable
Resolution / input impedance24bit / Gohm
Reference junctionYes / 2Yes / 4Yes / 6
Withstand voltage / galvanic isolation±100VDC / ±400VDC to PE
Channel to channel±110VDC / ±400VDC
Digital frequency inputs4 to 8-
Input signallow: 0 - 2V / high: 5 - 50VDC ~3.5mA-
Measurement range, frequency inputs / broadcounter0.2Hz - 1MHz / 64bit-
Galvanic isolationyes, up to ±400VDC to PE-
Digital outputs (also PWM)4 to 8-
Max. switching voltage / current50V / 3A-
PWM basic frequency5Hz to 10KHz-
Pulse-width modulation / resolution1:1000-
Galvanic isolationyes, up to ±400VDC to PE-
Digital voltage reference1-
Currentup to 140mA-
Short circuit proofyes-
Galvanic isolationyes, up to ±400VDC to PE-
Data storage 
Data storage internal2 - 14GB / ca. 30 million measurement values to GB
Data storage externalUSB, NFS, CIFS, (S)FTP
Sensor bus SDI1211-
Physical equipment COM1 / COM2RS485, 9-pole sub D-plug, DIN EN ISO 19245-1
Physical equipment COM3RS232, 9-pole sub D-plugs
LAN1 x 1000Base-TX, 1 x 100Base-TX
WLAN (optional WWAN)802.11b/g/n
WWAN (optional to WLAN)UMTS, LTE (configuration, real-time data, email)
USBUSB 2.0 low / full / high-speed / Host 2.0 low speed
CAN / PROFIBUS2x / 2x, max. 12Mbit
PROFIBUSDPV1 slave / passive sniffer
RS232 / RS485Modbus RTU, SCPI, ASCII
General techincal information 
Dimensions / weight210 x 80 x 125mm / 750g
FixingRail mounting DIN EN 60715 or screw fixing
Signal connectionsPlug-in screw terminals, 96 in 2 rows, connecting cable max. 1.5mm2
Temperature range-20 - 60°C
Power supply12 - 24VDC / ±10%
Power input - normal modemax. 10W
Power input - sleep mode5mW @12V, 10mW @24V

Complete system
ProfiSignal is a complete software system for data acquisition, analysis, visualisation and automation. The software is very user-friendly and combines professional functionality with easy operation. ProfiSignal provides a clear and logical overview of all measurement systems: whether for single or multi-thousand channel applications. For new users, ProfiSignal is quick to learn. ProfiSignal is modular, scalable and available in three versions: Go, Basic and Klicks. Each version has backward compatibility for operability, data files and application projects.

Measurement Database Included
Measurment hardware configuration takes place with the DataService / Configurator software included in ProfiSignal. The software configures hardware and software interfaces and records data securely and permanently.
The DataService saves measurement data to a database. Any ProfiSignal version on the network can then access these databases and immediately display their data as trends.

  • Confgures hardware
  • Records data to data files
  • Records data to databases
  • Calculation functions
  • Monitoring functions
  • Event Alarms (e-mail, text message, fax)
  • User management and password protection systems
  • Standard software interfaces (OPC, Modbus ...)
  • Customized software interfaces (OCX, .NET ...)

Overview of software modules

ProfiSignal GO

ProfiSignal GO is a runtime system enabling measurment data to be displayed and analyzed in just three steps. The GO version is able to analyze large volumes of offline and online data.
  • Data acquisition and recording
  • Data analysis and calculations
  • Online and offline trends
  • Data export and print outs
ProfiSignal Basic

ProfiSignal Basic, like ProfiSignal Klicks, is a developmental system for generating custom systems with visualization and trend functions

  • Operation and observation
  • Process visualization
  • Report generation
ProfiSignal Klicks

ProfiSignal Klicks is software for test automation and the programming of control systems

  • Automating test stands and process control systems
  • Automating evaluation and analysis functions
  • Generating parameter graphs
  • Selective frequency band evaluation


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