What is a Data Logger?
What is a Data Logger?
A device that uses sensors to record measured data onto a storage medium.
Compared to oscilloscopes, their sampling speed is slower, but they enable multi-channel, long-term measurement.
Graphtec Iwatsu data loggers are designed for versatile use, allowing them to measure a wide variety of phenomena. For this reason, they feature an intuitive button layout and user-friendly menu structure, ensuring ease of use for all customers.
In addition, these instruments feature a variety of functions, including sampling rates of up to 1 MS/s (on select models), expandability up to 200 channels (on select models), multi-function inputs, and isolation between all channels. Graphtec Iwatsu Test Instruments offers a wide range of products to meet the diverse needs of measurement applications.
How to Choose a Graphtec Iwatsu Data Logger
- By reducing the number of channels, data collection is possible at a maximum sampling speed of 5 ms (10 ms for GL260).
- Wireless measurement is enabled with the wireless LAN unit.
- GL260: Fixed 10 channels, compact body.
- GL860: Lineup of 4 input terminal types selectable to match your application.
- Expandable up to a maximum of 200 channels using options (GL860 only).
| Item | GL260 | GL860 (B-565) | GL860 (B-563SL-30) | GL860 (B-563/B-563SL ) | |
|---|---|---|---|---|---|
| Number of input channels | 10ch | Standard：20ch Maximum：200ch | Standard：30ch Maximum：200ch | Standard：20ch Maximum：200ch | |
| Sampling speed | 10ms (1ch) | 5ms (1ch) | |||
| Measurement ranges | Voltage | 20mV～100V | |||
| Temperature | Thermocouples：K, J, E, T, R, S, B, N, C (W：WRe5-26) | ||||
| – | RTD Pt100, JPt100, Pt1000(IEC751) | *RTD connection is not supported. | |||
| Direct Current | 4~20mA ※1 | ||||
| Humidity | 0～100% ※2 | ||||
| Logic / Pulse | ● ※3 | ||||
| Maximum permissible input voltage | Between input terminal/input terminal | 60Vp-p | 600Vp-p | 60Vp-p | |
| Between input terminal/GND | 60Vp-p | 300Vp-p | 60Vp-p | ||
| Storage device | Built-in 8GB Flash Memory One SD card slot | ||||
| PC I/F | USB / Wireless LAN / ※4 | USB / Ethernet / Wireless LAN ※4 | |||
- Convert to 1–5 V using a 250 Ω shunt resistor (Option: B-551).
- Use a humidity sensor (Option: B-530).
- Use the GL I/O cable (Option: B-513). Configurable to switch between 4 channels of either logic or pulse.
- Use the wireless LAN unit (Option: B-568).
Useful Features of Graphtec Iwatsu Data Loggers
Measurement Functions
Scaling
This function converts analog voltage from a sensor into different units for measurement.
Memory-Related Functions
Ring / Relay Recording Function
It features a “Ring Recording Function” that automatically deletes the oldest data once the specified number of data points per file is reached, and a “Relay Recording Function” that seamlessly records continuous data by splitting files into specified relay units without losing any data.
Backup Function
The recorded data can be automatically backed up to another storage medium at regular intervals. With the FTP client function, the recorded data can be automatically backed up to an FTP server or another storage medium at regular intervals.
Backup Interval: 1, 2, 6, 12, or 24 hours
Backup Destination: SD1, SD2, or FTP
File Format: GBD or CSV
Data can be saved in CSV format.
Available when the sampling speed is slower than 100 ms.
SD card replacement
The SD memory card can be replaced while data is being recorded or backed up. (Available when the sampling speed is slower than 100 ms.)
Communication-Related Functions
Web Server Function
This function allows you to configure the GL series and monitor measured values on a web browser. It is also equipped with an FTP server function, enabling the transfer and saving of recorded files within the GL series to a PC.
Introducing the Dedicated PC Software
The PC software for Graphtec Iwatsu data loggers is completely free of charge.
(*Available for download after registering for our Web Membership Service.)
- GL Device Control
- Input Data Verification
- Data Recording
- Playback of Recorded Data
GL Series Integrated Waveform Viewer
GL-Connection
By connecting to the GL series via USB or LAN, you can configure the GL series, display input signals in real time, record data, and play back data.
- Diverse Waveform Display Options
- Multi-Window Function
- Tab Function
- Multi-Unit Connection and Data Merging Function
Application Software for PC
GL980_2000-APS
It easily connects to the GL2000/GL980 and is equipped with useful features such as “File Overwrite and Concatenation Functions,” a “Direct Excel Function,” and a “Printing Function.”
- Diverse waveform display
- Connected device search function
- Offline scaling of measurement data
- Schedule management
- Electricity rate setting and display function
- VPD (Vapor Pressure Deficit) channel display function
- Accumulated temperature unit switching function
- Search list display function
- Synchronized recording of multiple devices and automatic file merging function
- Direct Excel transfer
- Converting and saving playback data (all data or between cursors)
GL100_GL240_GL840-APS
Control and operation, such as configuration, recording, and data playback, are possible via a USB or LAN connection.
- Diverse waveform display
- Connected device search function
- Offline scaling of measurement data
- Schedule management
- Electricity rate setting and display function
- Saturation deficit channel display
- Accumulated temperature unit switching function
- Search list display function
- Synchronized recording of multiple devices and automatic file merging function
- Direct Excel transfer
- Converting and saving playback data (all data or between cursors)
GL28-APS
Configuration, recording, and data playback can be controlled and operated via USB or LAN connection.
- Diverse waveform display
- Connected device search function
- Schedule management
- Search list display function
- Statistical display of any range (maximum, minimum, average, P-P)
- Synchronized recording of multiple devices and automatic file merging function
- Direct Excel transfer
- Playback data can be saved for all data or between cursors.(Saving in CSV format is also available.)
| GL-Connection | GL980_2000-APS | GL100_240_840-APS | GL28-APS | |
|---|---|---|---|---|
| Supported models | GL7000 Plus GL2000 GL980 GL860 GL840(Main unit Ver. 1.21 or later) GL260 GL240(Main unit Ver. 1.21 or later) GLT400 GL900-4/-8(Main unitVer.3.01or later) GL820(Main unitVer.1.08or later) GL220(Main unitVer.1.06or later) | GL2000 GL980 | GL840 GL820 GL240 GL220 GL100 | GL860 GL840 GL260 GL240 |
| Number of connected devices | 20 units | 1 units | 10 units | 10 units |
| Maximum number of channels | 2000ch | 4ch or 8ch | 1000ch | 1000ch |
| Mixed USB/LAN connection | Yes | No | Yes | Yes |
| Split screen view | 4 screens | 1 screens | 1 screens | 1 screens |
| Group function | Max. 20 groups | None | Max. 4 groups | Max. 4 groups |