The GL840 Data Logger
The Multi Inputs Model is designed for temperature measurement in multiple channels and the Withstand Voltage Model is designed for stacked high voltage battery application and high precision temperature measurement.
Three types of input system enable to measure various phenomena
Input system 1 : Multi-function analog input ports
Contains a highly isolated input system which ensures that signals are not corrupted by noise from other channels. The GL840`s inputs are suitable for combined measurements from voltage,temperature,humidity, logic, and pulse signals.
The standard configuration has 20 analog input channels. It is expandable to 200 channels by adding optional 20 channels extension terminal base unit(B-566) and input terminal units(B-564 or B-565).
|Withstand voltage & Accuracy||Multi-input type (B-564)||Withstand-voltage type (B-565)|
|Voltage||Input voltage range||20 mV to 100V||20mV to 100V|
|Max. voltage (Input – GND)||60 Vp-p||300 Vp-p|
|Temp.||Thermocouple||R, S, B, K, E, T, J, N, W (WRe5-26)|
|RTD (Resistance Temp. Detector)||Pt100 (IEC751), JPt100 (JIS), Pt1000 (IEC751)|
|Accuracy||Voltage||± 0.1% of F.S.||±(0.05% of FS + 10μV)|
|Temperature*||± 1.55 ºC||± 1.1 ºC|
* Accuracy rating for K-type thermocouple at 100˚C includes reference junction compensation. Accuracy varies by the temperature levels and thermocouple types.
Configuration for additional channels
|Number of channels||20 channels||40 channels||100 channels||200 channels|
|GL840 unit (GL840-M or GL840-WV)||1 set||1 set||1 set||1 set|
|Connection cable(B-567-05 or -20)||N/A||1 pc||1 pc||1 pc|
|Terminal base (B-566)||N/A||2 sets||5 sets||10 sets|
|Input terminal (B-564 or B-565 )||N/A||1 set||4 sets||9 sets|
Offers longer cable for the input terminals
Input terminal blocks can be connected directly(in daisy chain), or using the B-565 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.
Input system 2 : Support digital sensors
Digital sensors and input terminal/adapters for the GL100 connects to the GL840 directly.
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.
Maximum sampling interval of up to 10ms
Provides faster sampling rates for voltage measurements. You are able to achieve up to 10ms sampling speed when limiting the number of channels in use.
|Number of channel||1||2||5||10||20||50||100||200|
Supports large-size SD memory card for reliable long term measurement
New GL840 series carries two SD memory card slots for storage device. The SDHC type SD memory card is supported up to 32GB. 4GB SD memory card comes as a standard accessory installed in the first slot.
The captured data can be stored in GBD(Graphtec binary data) or CSV file format.
Capturing time* (when all 20 analog channels are being used with Logic/`Pulse inputs turned off.)
|GBD format||31 days||77 days||95 days||108 days||270 days||Over 365||Over 365|
|CSV format||3 days||11 days||16 days||21 days||54 days||109 days||Over 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
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
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
SD card can be replaced during data capturing when the sampling interval is 100ms or slower.
Alarm output function
Based on set conditions for each channels, alarm signal can be placed using the four channel alrm out put ports.*
*Input/Output cable(B-513 option) is required to connect the alrm output ports to external buzzer/light mechanism.
USB drive mode
USB drive mode function enables data to be transferred to the PC from GL840 by drag&drop feature.
Simple to use navigation screen allows setting operation for measurement and wireless LAN adapter.
Large easy-to-read 7-inch wide color LCD
Carries a clear 7-inch wide TFT color LCD screen (WVGA:800×480 dots) for the GL840. Monitoring data are displayed in waveform or digital form option. Parameter settings can be displayed on the screen.
3 Types of power source
Choose from AC power supply, DC supply* or the rechargeable battery pack.*
*DC power drive cable(B-514) and battery pack(B-569) are optional accessories.
WEB&FTP server function
GL840 can be controlled externally via a network on the WEB browser, which also supports monitoring and transfer of signals and captured data.
FTP client function
Captured data is periodically transferred to the FTP server for backup.
NTP client function
The clock on the GL840 is periodically synchronized with the NTP server.
*The GL840 needs to be connected to a LAN environment using the available Ethernet/WLAN ports for above functions.