Home > Dataloggers and Chart Recorders > Graphtec Data Loggers and Chart Recorders > Graphtec MidiLogger Chart Recorders
(Details shown apply to the default selection)
Analogue Inputs: 20
1 in stock, immediate despatch
The Graphtec GL840 data logger is one of a kind in its ability to read up to 200 channels of temperature, humidity and voltage data. The GL840 Data Logger now is offered in two models: – the GL840-M “Multi-Inputs Model” and the GL840-WV “Withstand Voltage Model”. Both models feature large format LCD display, fast acquisition rates, voltage, 4-20mA and thermocouple inputs, extensive memory storage and option WiFi interface.
Wide Input Range
Supports digital sensors
Digital sensors and input terminal/adapters for the GL100 connects to the GL840 directly.
Modular system allows expansion up to 200 channelsThe standard configuration has 20 analogue input channels. It can be expanded up to 200 channels by adding optional 20 channel extension terminal kits.
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.
Isolated channels, each with multifunction inputIt contains an isolated input system which ensures that signals are not corrupted by inputs to other channels, thus eliminating wiring concerns. The GL840s multi-type inputs are suitable for voltage, temperature, humidity, pulse, and logic signals, enabling combined measurements of different phenomena like temperature/humidity and voltage.
Maximum sampling rate of up to 10msProvides faster sampling rates for voltage measurements. Can achieve 10ms sampling interval when limiting the number of channels in use.
SD Card Memory
GL840 series carries two SD memory card slots. SDHC up to 32GB supported. Captured data can be stored in GBD (Graphtec Binary Data) or CSV file format.
Ring Function The most recent data is saved when internal memory or external memory is configured in ring memory mode. Captured data size in ring memory mode is limited to 1/3 of available memory.Large 7" LCD DisplayUtilises a bright clear 7-inch wide TFT colour LCD monitor (WVGA: 800 x 480 dots). Makes it easy to read data in waveform or digital form and to check your measurement parameter settings. The background color of the screen can be set to black or white.
Easy connection to PC via USB or EthernetThe GL840 can be controlled by a PC if connected by USB cable, allowing transfer of data to a PC in real-time. If you need to move large data files to your PC then the GL840 can emulate an external USB drive for quick data transfer.The WEB & FTP server function, FTP client-server function and NTP client function are supported when the GL840 is connected to the LAN via the Ethernet port.
Application software for PC
Various measurement screensSelect from 4 screens such as the Y-T (waveform + digital), Y-T (large waveform), digital view and report view to display measurements in real time. The direct-Excel function enables captured data to be written directly to an Excel file.Data replay screensThree screens such as the Y-T (waveform), digital and the X-Y graph for specified data are available to view measurements in replay mode. The maximum, minimum, average and peak-to-peak vales between cursors are indicated in the digital display screen.Simple configuration screensThe number of configuration screens has been reduced to five. Parameters can be set easily while viewing measured waveforms.Useful functionsPost-process your captured data with useful functions for arithmetic calculation, statistical calculation, search and file format conversion.
Smartphone and Tablet Software (Wifi Required)
Recording Start/Stop, Sampling Interval, Alarm Output (with the mail sending feature). Display/Recording Configurations of GL840/GL240 using the WEB server feature
User Manual >>
PC Software >>
B-569 Battery Pack£187.00
B-566 Graphtec GL840 Extension Terminal Base£275.00
B-564 GL840-M 20-Channel Extension Terminal Set£540.00
B-565 GL840-WV 20-Channel Extension Terminal Set£823.00
B-567-05 Graphtec GL840 Extension Cable 0.5m£150.00
B-567-20 Graphtec GL840 Extension Cable 2m£184.00
B-568 WiFi Expansion Unit£209.00
B-530 Graphtec Humidity Sensor Probe£432.00
B-513 Graphtec Logic Alarm cable£98.00
AF1450 Carry Case for the GL840£129.00
GS-TH Temperature and Humidity unit for Graphtec GL100£112.00
Be the first to Write a Review for this item!