Graphtec GL900 Specifications

In compliance with various test requirements, this data logger is capable
of performing high-speed simultaneous voltage and temperature measurements

High-speed isolated 8-channel multifunction logger

GL900

Data can be captured to PC-friendly
USB memory sticks

Long-term data ca n be ca ptured direc tly to built-in 256 -MB flash memory or to an
external U S B memory s tick at
sampling interva ls

from 1 ms to
1 min. F or high-s pe ed s ampling at
interv a l s fa s te r tha n 1 ms , u p to
one million data points c an be
ca ptured to internal R AM.

Example of 8-channel analog measurement

C apture des tination

Internal R AM
(up to one million points)

Internal flash memory (256 MB)

E xternal US B memory stick (5 12 MB )

The USB memory stick must be a standard model (without ngerprint recognition or other proprietary features).

an

10μs

10 seconds

Simple data transfer to desktop PC.

Enables data transfers and remote operation

100μs

500μs

×

×

1ms

Approx. 16 min.

and 40 sec.

Approx. 11 hrs.

Approx. 22 hrs.

Approx. 1 min.

Approx. 8 min.

and 40 sec.

×

×

and 20 sec.

×

×

LAN / USB

10ms

Approx. 2 hrs.

and 40 sec.

Approx. 4 days

Approx. 8 days

100ms

Approx. 1 day

and 3 hrs.

Approx. 49 days

Approx. 98 days

1s

Approx. 11 days

and 13 hrs .

Approx. 493 days

Approx. 986 days

Easy-to-use, upright, high-speed, isolated
8-channel multifunction logger

An easy-to-use upright device enabling isolated 8-channel multifunction input,
the GL900 is capable of performing high-speed simultaneous measurements of
voltage, temperature, and various other phenomena.

BNC terminal

Voltage

+/-20 mV to +/-500 V

Thermocouples:

Temperature

K, J, E, T, R, S, B, N, W

0 to 100%

Humidity

(the B-530 option is required)

4 channels

Pulse

Count, Inst., RPM

4 channels

Logic

‡ Select either Pulse or Logic

for voltage measurement

M3 screw terminal

for temperature measurement
‡ Conne ctions a re ma de to

both the BNC terminal and
M3 screw terminal for the
same channel.

Can be used an X-Y recorder

The GL900 reproduces analog X- Y recorder
movements and provides the illusion of pen
up/pen down movements. It ca n be
operated like an analog X- Y recorder and
can also be used as a 4-pen X- Y recorde r.
T he digital data format facilitates
post-mea s urement confirmation of data
values and report creation.

High precision measurement
even during high-speed sampling

Le ts use rs perform high-prec is ion temper ature measureme nts even during
high-speed sampling – ideal for performing combined voltage and temperature
measurements.

High-voltage measurement capabilities

Built-in, large-format 5.7 inch color
LCD for easy-to-read waveforms

The wide 500 V range enables 100 to 240 VAC power supply voltage waveform
measurements. Using logic input and a clamp meter simultaneously allows
measurement of a device’s power supply voltage and current concurrently with
sequential control of various points.

Sequence: Logic

Humidity: Dedicated humidity sensor

Temperature: Thermocouple

Current: Clamp meter

Voltage

AC

power supply

The bright, easy-to-read large-format 5.7-inch color TF T LCD provides vivid,
easy-to-read waveform displays. Cursor keys enable fast, easy control and
setup. The waveform display can be scrolled at high-speed – 10 ms/DIV.

5.7-inch color TFT LCD

Cursor keys

Free Running display for waveform-analysis
for non-recording usage

The Free Running display lets users check input
signal waveforms even before measurements begin.
Waveforms are displayed on each setup screen,
users can change settings while viewing the waveforms.

Easy PC measurement via USB; remote monitoring via ethernet
Web server and FTP functions

The USB and Ethernet connections enable transfer of captured data to your PC
and setup and control of the GL900 from a PC, even without the PC software
provided as standard software with the GL900.

Ethernet

Web server/FTP server functions

Wa ve form dis play a nd G L90 0 setup ope ra tions can be pe rformed v ia a we b brows er
(e.g. , Internet E xplorer). In ad dition, data files captured to the G L900 ’s interna l
memory or to a US B memory s tick c an be trans ferred or deleted from the P C.

USB drive mode

When your GL900 is connected to your PC via the USB interface, the GL900
can be operated in USB mode to enable fast, easy data transfers from internal
memory to the PC.

NT P client function

Simply connect the GL900 to an NT P server via an Ethernet connection to
synchronize GL900 time with NTP server time at periodic intervals.

TIME/DIV key

Expansion/
reduction

A

Comprehensive built-in trigger and timer functions

Using a combination of trigger and timer functions eliminates s

Setting

To perform measurement over a four-day period starting J anuary 10

example

Timer setting

1

Stop s etting J anua ry 14 23 hours 59 minutes

Trigge r s etting Start trigger O ff
Stop trigger Off

Start key On

J anua ry 1

Setting

To perform meas urements of abnormal s ignals during device operations

example

Timer setting Daily cycle S tart setting 09 hours 00 minutes

2

Stop setting 17 hours 00 minutes

Trigge r s etting Start trigger Lev el C H 1 (3 V Rising)
Stop trigger Le vel C H 1 (2 V Falling)
Rep ea t On

Start key On

S tart trigger 3 V

S top trigger 2 VS top trigger 2 V

0:00 6:00

Date and time

5 1015202530

12:00 18: 00 0:00 6:00 12:00 18:00 0:00

S tart setting January 10 00 hours 00 minutes

End of data c apture a s timer s etting takes priority

Timer period

Data capture

Timer period

T rig ger a cti vati on p oints

Data capture

Setting

To perform measurements every 20 minutes

example

Time r s etting Hour ly c yc le S ta rt se tting 00 minutes 00 s econds

3

Stop setting 20 minutes 00 seconds

Trigge r s etting S tart trigger O ff
Stop trigger Off

Start key On

0:00

Setting

To perform meas urements for a period of one h our, eve ry four hours , daily

example

With the timer set to daily cycle status, data is captured repeatedly for one hour every four hours.

4

Trigge r s etting S tart trigge r Off
Stop trigger S cheduled time (one hour)
Rep ea t On (Rep eat interval: 4 hours )

Time r settings Time r mode Off, Dat e and time , Daily c yc le, Hourly cyc le

Trigge r s ettings S tart sourc e s etting Off, Le vel value, E xternal input

S top s ource setting Off, L eve l value , Externa l input, Sc hedule d time

P re-trigger 0 -100％

Rep eat ca pture On, Off and Repe at interva l

1:00 2:00 3:00 4:00 5:00 6:00

Timer period

Data capture

Dedicated software for real-time data capture

Three measurement screens are provided to allow selection of the screen that best suits measurement needs.
The Replay screen provides a Zoom screen feature to enable enlarged display of specic sections of long-term measurement data.

Replay screen: Zoom

Measurement screen: Y-T

Measurement screen: X-Y

Measurement screen: FFT

Simple operations for various user levels.

Easy-to-use software using icon keys
for intuitive operations

Switch Relative / Absolute time

Expand time axis Expand Y axis

Reduce time axis

Move position down

Move position up

Reduce Y axis

Trace ON/OFF

Display digital values window

Convenient functions

Various convenient data-processing functions are built in.

Direct to Excel function

T his function enab les mea surem ent data to be written dire ctly
to an E xc el file.

Search function

This func tion enab les sea rching for specific val ues in the
captured data.

CSV batch conversion function

This func tion enab les batch conversion of multiple ca ptured
files to CSV file forma t.

Thumbnail function

This func tion enab les display of c aptured da ta files as thumbnails.

Display comment input window

Change screen display

Display Search window

Display cursor window

Display waveform operation window