Graphtec GL840 Data Logger

Portable, 20+ channel data logger with isolated universal input, 350Vp-p for 1 minute max voltage.

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Part Number

GL840-M

Manufactured

By Graphtec

Includes

FREE Ground Shipping
FREE Lifetime Tech Support

Product Manual Product Specs (2 Files)

Features

7 inch TFT color LCD screen
Ability to access additional (GL100) sensors & adapters
20 analog input channels, expandable to 200 channels
- All channels isolated
AC, DC, & rechargeable battery pack power sources
WLAN capable using optional WLAN Unit B-568
- For remote monitoring and data logging
Smartphone access via GL-Connect app
Max sampling interval up to 10ms
Extend memory capacity with SD cards
- Purchased separately, compatible up to 32GB
Flexible input system for a wide array of applications

What's in the Box

AC power adapter
Quick reference guide
Internal 4GB flash memory
Software & manuals (CD)
Calibration cert
3-year warranty

The Graphtec GL840 data logger is a standalone multichannel data logger with isolated universal input. In addition to accommodating numerous measurements, the GL840 includes many communications options and advanced functions making it an incredibly versatile data acquisition instrument for a wide array of applications.

The GL840 has 20 analog input channels, isolated so that wiring errors or overloaded channels do not affect neighboring channels. The system is easily expandable to up to 200 channels by adding the optional B-566 terminal base unit and input terminal units (B-564 or B-565). Input terminal blocks can be connected directly via daisy chain or by using cable. This allows the input terminals to be placed in separate =locations depending upon the requirements of the application.

The GL840 has two SD card slots which support up to 32GB of memory which can hold over a year's worth of data depending upon the sampling rate. A full color, 7-inch TFT display allows user to view data in waveform or digital form while also displaying parameter settings.

The Graphtec GL840 includes a number of communications features which allows integration with other devices and easy file sharing. A wireless LAN module (B-568) can be added to connect the GL840 with Graphtec GL100-WL modules. This expands the measurement variety of the GL840 by utilizing sensors available to the GL100-WL which will relay data directly to the GL840. The GL840 can also be connected to a LAN via a WLAN access point. Measured data can then be monitored via a PC or smart device using the application software. Configuration can also be set via the network.

Spec Sheets

Manuals

Other

Graphtec GL840 Data Logger Terminal Block Expansion Datasheet PDF (4.5 MB)

Application Notes and White Papers

Software

Cables

Graphtec B-513 Logic / Alarm Cable

Cable, 4 x Logic inputs & 4 x alarm outputs, 2 meters.

In Stock

$95.00

Graphtec B-514 DC Power Cable

2 meter DC power cable with bare ends for direct connection to DC power source.

In Stock

$60.00

Graphtec B-567 Connection Cable

50cm or 2-meter cables for connecting the B-566 extension terminal base on the GL840 datalogger .

Some Models in Stock

Starting at $135.00

Sensors/Probes

Graphtec B-530 Humidity Sensor

Humidity Sensor, 0 to 100% RH.

$425.00

Batteries/Chargers

Graphtec B-569 Battery Pack

Battery pack, maximum 6 hours.

In Stock

$225.00

Graphtec ACADP-20 Power Supply

Spare AC power adapter for GL220, GL240, GL820, GL840, and GL900 products.

$165.00

Accessories

Please consider these optional accessories.

Graphtec B-568 Wireless LAN Module

Allows for Wireless Communications on Graphtec GL240 and GL840 Data Loggers.

In Stock

$225.00

Graphtec B-566 Extension Terminal Base

20-channel terminal base for input terminals B-564 and B-565.

In Stock

$225.00

250 Ohm Precision Resistor

Shunt resistor for DC current input.

In Stock

$4.25

Graphtec GL840 Pelican Case

Pelican Polypropylene case with foam inserts cut to fit and protect your GL840 data logger.

$375.00

Here's how some of our customers use this product...

Creating Temperautre Maps

The Background: A consumer electronics company is creating a temperature map as part the development of a new product.

The Problem: Temperatures are taken at 27 points on the test surface. To identify emerging trends, the customer wants to log all the measurements.

The Solution: The Graphtec GL840 was paired with 27 Watlow thermocouples to create the matrix used for temperature measurement. The GL840 has 20 input channels and can be expanded to up to 200 channels. Multiple communications options make it easy to transfer data for analysis.