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Multi-channel Data Logger GL840 series

“Multi-inputs” & “Withstand-voltage” 2 Model Line-up

GL840 has two line-up that is “multi-inputs model”, suitable for temperature measurement with multiple channels, and “withstand-voltage model”, suitable for stacked high voltage battery application, or high-precision temperature measurement.
Supports three types of input formats and the analog signal input port can be expanded from the standard 20 channels to a maximum of 200 channels. It makes measure a variety of phenomena.
The optional wireless LAN unit enables wireless measurement, remote monitoring and measurement, and expanding the measurement range.

Two models for application specific use

Three Types of Input System Enable to Measure Various Phenomena

Input system 1 : Multifunction analog input ports

Measure voltage

Supports wide operating range (from 20 mV to 100 V)

Measure temperature

  • Thermocouple : K, J, E, T, R, S, B, N, C (WRe5-26)
  • RTD: Pt100, JPt100,Pt1000 (IEC751)

Measure current (4 -20 mA)

Shunt resistor (250Ω) is available as an option.
Equipped with a dedicated 1-5V range for the measurement range

  • Shunt resistance 250Ω (B-551)
    Cannot use B-551 resistor with B-564SL input terminal

Measure humidity

A humidity sensor is available as an option.
Power for the sensor is also supplied from the main unit.
Equipped with a dedicated humidity range

  • Humidity sensor (B-530)

Digital I/O port available

Digital I / O can be used by connecting an optional I / O cable.

  • Input/Output cable (B-513)
入出力ケーブル (B-513)

Logic/Pulse inputs (4 channels)

Logic : No-voltage contact (A contact, B contact, NO, NC) ,Open collector, Voltage input (H.L decision)
Pulse : 3 types of selections (Rotation / Quantity count / Instantaneous) per channel

Input system 2 : Support digital sensors

Digital sensors and input terminal/adapters for the GL100 connects to the GL840 directly.

Support digital sensors

Input system 3 : 4 channels of Logic/Pulse inputs

Supports 4-channels logic or pulse signal inputs. Pulse mode allows cumulative, instant, or rotational values for industrial measurement capability with speed and flow.

4 channels of Logic/Pulse inputs

Analog Signal Input Ports Channel Expansion

The number of channels on the terminal block can be expanded from the standard 20 channels to 200 channels in 20-channel increments.

The following shows how a standard configuration is expanded to more than 40 channels

The following shows how a standard configuration is expanded to more than 40 channels
Number of channels20ch40ch100ch200ch
GL840 unit
(GL840-M or GL840-WV)
Connection cable
(B-567-05 or -20)
Terminal base
Input terminal
(B-564 or B-565 )

Offers longer cable for the input terminals

Input terminal blocks can be connected directly (in daisy chain), or using the B-567 cable(s). This allows the input terminals to be placed in separate locations according to the need of the application.
The input terminal unit and the GL840 main body can be extended by using an extended connections cable.

  • If the signal is affected by noise, it may be required to use a slower sampling.
Offers longer cable for the input terminals

Optional terminal lineup

  • Standard terminal : B-564
  • Withstand high-voltage high-precision terminal : B-565
  • Screwless terminal : B-564SL

Wireless Measurement Using Wireless LAN (option) *

  • Optional Wireless LAN unit is available in limited region.

Wireless LAN option enables the wireless communication with other device.
Connects to the GL100-WL wireless unit remotely when the GL840 is set as an access point.
When the GL840 is set as a station, PC and smart devices will be able to access the WLAN unit directly.

Remote monitoring

Measured data can be monitored and controlled via PC or a smart device using the application software.

Combining GL100-WL / GLT400 and GL840

  • Expand up to 200 ch (incl.GLT400) per GL840 or Up to 5 units of GLT400 can be connected to GL840 host.
    Setup and control GLT400 with GL840.
    Captured GLT400 data can be viewed and stored on GL840.
  • GL840 supports up to five units of the GL100-WL.

Maximum Sampling Interval of up to 10ms

Provides faster sampling rates for voltage measurements. Up to 10ms sampling speed is achievable when limiting the number of channels in use.

Sampling Interval10ms20ms50ms100ms200ms500ms1s
Number of channel125102050100

Built-in 8GB Flash Memory with SD Card Support

Capturing time* (when all 20 analog channels are being used with Logic/Pulse inputs turned off.)

GBD format31 days77 days95 days108 days270 daysOver 365Over 365
CSV format3 days11 days16 days21 days54 days109 daysOver 365
  • Figures are approximate. File size of captured data is 2GB in GBD or CSV file format on this chart.
    Sampling interval is limited by the number of channels in use. (10ms:1ch, 50ms:5ch, 100ms:10ch)
    Limited sampling speed is available when digital sensors and GL100-WL are used as a remote monitoring device.

Ring capture function

Ring capture function

The most recent data is saved when the memory is configured in ring memory mode. (Number of capturing data is 1000 to 2000000 points)

Relay capture function

Relay capture function

Data is continuously saved to multiple files up to 2GB without losing any data until capturing is stopped when the memory is configured in the relay mode.

Hot-swapping the SD memory card

Hot-swapping the SD memory card

SD card can be replaced during data capturing when the sampling interval is 100ms or slower.

Back up recording data

The data file can be created periodically for purpose of backing up data while recording it, and the file is automatically transferred to another storage device on the unit or FTP server on the network.

Backup interval: 1, 2, 6, 12, 24 hour(s)
Backup file destination: SD memory card or FTP server
Data file format: GBD (binary) or CSV (text)

  • • Available sampling speed is the 100 ms or slower when using the CSV format.
    • When the RING mode or external pulse synchronization sampling is selected for recording, the backup function is not available.
    • The storage device specified as the recording destination of the measurement data can not be set as the transfer destination of the backup file.
    • When backup is enabled and data file format is specified with CSV format, SD memory card exchange (hot-swapping) and RELAY recording are not available.
Back up recording data

Data file verification

It is a function to check the integrity of the data file when replaying the data file. It compares check-sum generated from the data file and recorded check-sum. When two check-sums do not match, the data file may be corrupted or has been changed by someone. The check-sum code is recorded into the file when data file is created by the GL unit.

  • Check-sum code is added to normal data recording file and also file created for backup, ring or relay recording. Adding check-sum is available for data files created in GBD format.When the recorded data file is converted and saved using GL100_240_840-APS or GL-Connection software, the check-sum code will not match.
  • This function is available with firmware version 1.43 or rater.
Data file verification

Useful Functions

Useful functions

  • Displays the data by a bar chart (in firmware ver.1.10 or later)
  • Alarm output function
  • USB drive mode
  • Navigation function
  • Large easy-to-read 7-inch wide color LCD
  • 3 Types of Power Source
  • Networking features

Application Software

For PC

  • GL100_240_840-APS
    The application software connects GL series to PC. It perform such as setting, recording, and managing the captured data.

For Smart device

  • GL-Connect
    Monitor and remote setting with smart device.

the high-performance software

  • GL-Connection
    Connect GL series and PC via LAN / USB and maintain recording data.

Connection with thermal printer DP-581H

  • The printer can be connected via USB or LAN cable
  • Print out data instantly and prevent data tampering