Vernier Go Direct GDX-WRT User Manual

1

6. Click or tap your Go Direct sensor
from the list of Discovered
Wireless Devices. Your sensor's ID
is located near the barcode on the
sensor. The Bluetooth LED will
blink green when it is successfully
connected.

7. Click or tap Done to enter data­collection mode.

Charging the Sensor

Connect Go Direct Wide-Range Temperature to the included Micro USB Cable
and any USB device for two hours.

You can also charge up to eight Go Direct Wide-Range Temperature Probes
using our Go Direct Charge Station, sold separately (order code: GDX-CRG).
An LED on each Go Direct Wide-Range Temperature indicates charging status.

Charging

Blue LED on steady while sensor is connected to
the Charging Cable or Charging Station.

Fully charged

Blue LED is off when charging is complete.

Providing Power

Turning on the sensor

Press button once. Red LED indicator flashes
when unit is on.

Putting the sensor in sleep
mode

Press and hold button for more than three
seconds to put into sleep mode. Red LED
indicator stops flashing when sleeping.

Connecting the Sensor

See the following link for up-to-date connection information:

www.vernier.com/start/gdx-wrt

Connecting via Bluetooth

Ready to connect Red LED flashes when sensor is awake and

ready to connect via Bluetooth.

Connected Green LED flashes when sensor is connected via

Bluetooth.

Go Direct

®

Wide-Range
Temperature

(Order Code GDX-WRT)

This rugged temperature probe features a wide temperature range, from –20°C to
330°C. The high upper limit of the sensor allows for melting point
determinations of most organic compounds. It uses platinum RTD (Resistance
Temperature Detector) technology to establish a ±0.5°C accuracy or better, as
well as excellent stability and repeatability. Each unit is individually calibrated,
and the calibration is stored on the sensor. It is designed to be used as you
would use a thermometer for experiments in organic and inorganic chemistry,
physics, biology, Earth science, and environmental science.

Note: Vernier products are designed for educational use. Our products are not
designed nor are they recommended for any industrial, medical, or commercial
process such as life support, patient diagnosis, control of a manufacturing
process, or industrial testing of any kind.

What's Included

l Go Direct Wide-Range Temperature
l Micro USBCable

Compatible Software

See www.vernier.com/manuals/gd x-wrt for a list of software compatible with
GoDirect Wide-Range Temperature.

Getting Started

Please see the following link for platform-specific connection information:

www.vernier.com/start/gdx-wrt

Bluetooth Connection USB Connection

1. Install Graphical Analysis 4 on
your computer, Chromebook™, or
mobile device. See
www.vernier.com/ga4 for software
availability.

2. Charge your sensor for at least
2hours before first use.

3. Turn on your sensor by pressing
the power button once. The
Bluetooth®LED will blink red.

4. Launch Graphical Analysis 4.

5. Click or tap Sensor Data
Collection.

1. Install Graphical Analysis 4 on your
computer or Chromebook. If using
LabQuest 2, make sure LabQuest
App is up to date. See
www.vernier.com/ga4 for software
availability or
www.vernier.com/downloads to
update LabQuest App.

2. Connect the sensor to the USB port.

3. Launch Graphical Analysis 4 or turn
on LabQuest 2. You are now ready
to collect data.

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Specifications

Temperature range –20°C to 330°C

Maximum temperature that the sensor can
tolerate without damage

380°C

Temperature sensing element Platinum RTD (100 Ω)

Accuracy ±0.3°C at 0°C

±0.2°C at 100°C

±0.5°C at 300°C

Response time from 25°C to 100°C in water 30 seconds

Probe dimensions Probe length (handle plus

body): 28cm

Stainless steel body: length
17cm, diameter 6.4mm

Probe handle: length 11cm,
width 3 cm.5, thickness 1.7
cm

Care and Maintenance

Probe Chemical Tolerance: The stainless-steel probe body is constructed from
grade 316 stainless steel. This high-grade stainless steel provides a high level of
corrosion resistance for use in the science laboratory. Here are some general
guidelines for usage:

l The probe handle is constructed of molded plasticized Santoprene

®

. While
this material is very chemical resistant, we recommend that you avoid
submerging the probe beyond the stainless steel portion.

l Always wash the probe thoroughly after use.
l The probe can be left continuously in water at temperatures within the range

of –20°C to 330°C. Continuous usage in saltwater will cause only minor
discoloration of the probe, with no negative effect on performance.

l You can leave the probe continuously in most organic compounds, such as

methanol, ethanol, 1-propanol, 2 propanol, 1-butanol, n-hexane, lauric acid,
paradichlorobenzene, phenyl salicylate, and benzoic acid. The probe should
not be left in n-pentane for more than one hour.

l The probe can be left in strong basic solutions, such as NaOH, for up to

48hours, with only minor discoloration. We do not recommend usage in
basic solutions that are greater than 3 M in concentration.

l The chart provides the maximum length of time we recommend for probe

exposure to some common acids. Probes left in an acid longer than these
times may bubble and/or discolor, but will still be functional. We do not
recommend probes be left to soak in any acid longer than 48 hours.

Connecting via USB

Connected and charging Blue and Green LED solid when sensor is con-

nected to Graphical Analysis via USB and unit
is charging. (Green LED is obscured by the blue
one.)

Connected, fully charged Green LED solid when sensor is connected to

Graphical Analysis via USB and the unit is fully
charged.

Charging via USB,
connected via Bluetooth

Blue LED is solid and green LED is flashing, but
the green flashing LED looks white because it is
overwhelmed by the blue.

Identifying the Sensor

When two or more sensors are connected, the sensors can be identified by
tapping or clicking Identify in Sensor Information.

Using the Product

Connect the sensor following the steps in the Getting Started section of this user
manual.

Important: When using this sensor, keep in mind that important electronic
circuitry is built into the handle of the probe. For optimal accuracy of the RTD,
keep the handle of the probe from warming above 40°C (104°F). If necessary,
shield the handle from high-temperature sources using aluminum foil or other
shielding material.

Calibration

Go Direct Wide-Range Temperature will never need to be calibrated. Each
probe is carefully calibrated before it ships, and this unique calibration is stored
on the sensor.