1
Bluetooth
®
LED will blink red.
5. Launch Graphical Analysis 4.
6. Click or tap Sensor Data
Collection.
7. 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.
8. Click or tap Done to enter data-
collection mode.
9. For best results, perform a two-
point calibration using the High
and Low Standard solutions.
4. Launch Graphical Analysis 4 or turn
on LabQuest 2.
5. For best results, perform a two-point
calibration using the High and Low
Standard solutions.
Charging the Sensor
Connect the Go Direct Ammonium Ion-Selective Electrode to the included
Micro USB Cable and any USB device for two hours. Connecting the Go Direct
Ammonium Electrode BNC to the amplifier during charging is optional.
You can also charge up to eight Go Direct Ammonium Ion-Selective Electrodes
using our Go Direct Charge Station, sold separately (order code: GDX-CRG).
An LED on each Go Direct Ammonium Ion-Selective Electrode indicates
charging status.
Charging
Blue LED on steady while sensor is connected to
the Micro USB Cable or Charge Station.
Fully charged
Blue LED is off when charging is complete.
Go Direct
®
Ammonium Ion-
Selective Electrode
(Order Code GDX-NH4)
Go Direct Ammonium Ion-Selective Electrode (ISE) is used to measure the
concentration of ammonium (NH
4
+
) ions in aqueous samples.
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 Ammonium Ion-Selective Electrode (Go Direct Ion-Selective
Electrode Amplifier connected to a Go Direct Ammonium Ion-Selective
Electrode BNC Electrode)
l
30 mL bottle of High Standard solution with SDS (100 mg/L NH
4
+
-N)
l
30 mL bottle of Low Standard solution with SDS (1 mg/L NH
4
+
-N)
l
Short-Term ISE Soaking Bottle
l
Micro USB Cable
Compatible Software
See
www.vernier.com/manuals/gdx-nh4
for a list of software compatible with the
Go Direct Ammonium Ion-Selective Electrode.
Getting Started
Please see the following link for platform-specific connection information:
www.vernier.com/start/gdx-nh4
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. Prepare the electrode by soaking it
in the High Standard solution for
30 minutes. Refer to the Using the
Product section for more
information.
4. Turn on your sensor by pressing
the power button once. The
1. Prepare the electrode by soaking it
in the High Standard solution for
30 minutes. Refer to the Using the
Product section for more
information.
2. 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.
3. Connect the sensor to the USB port.
