5
Accessories/Replacements
Item
Order Code
Electrode Storage Bottles, pkg of 5
BTL-ES
Standard High NH4 ISE Solution
NH4-HST
Standard Low NH4 ISE Solution
NH4-LST
Ammonium Replacement Module
NH4-MOD
Go Direct Ammonium Ion-Selective Electrode
BNC
GDX-NH4-BNC
Go Direct ISE Amplifier
GDX-ISEA
Micro USB Cable
CB-USB-MICRO
USB-C to Micro USB Cable
CB-USB-C-MICRO
Go Direct 300 mAh Replacement Battery
GDX-BAT-300
Warranty
Vernier warrants this product to be free from defects in materials and
workmanship for a period of five years from the date of shipment to the
customer. This warranty does not cover damage to the product caused by abuse
or improper use. This warranty covers educational institutions only. ISE modules
are covered by a one-year warranty.
Disposal
When disposing of this electronic product, do not treat it as household waste. Its
disposal is subject to regulations that vary by country and region. This item
should be given to an applicable collection point for the recycling of electrical
and electronic equipment. By ensuring that this product is disposed of correctly,
you help prevent potential negative consequences on human health or on the
environment. The recycling of materials will help to conserve natural resources.
For more detailed information about recycling this product, contact your local
city office or your disposal service.
Battery recycling information is available at
www.call2recycle.org
Do not puncture or expose the battery to excessive heat or flame.
The symbol, shown here, indicates that this product must not be disposed of
in a standard waste container.
Troubleshooting
Using Ionic Strength Adjustor (ISA) Solutions to Improve Accuracy
For optimal results at low concentrations of ions, a standard method for making
measurements with ion-selective electrodes is to add ionic strength adjustor
(ISA) solutions to each of your standard solutions and samples.
Adding an ISA ensures that the total ion activity in each solution being
measured is nearly equal, regardless of the specific ion concentration. This is
especially important when measuring very low concentrations of specific ions.
The ISA contains no ions common to the ISE itself. Note: The addition of ISA
to samples or standards does not need to be highly accurate. You can add the
ISA solution dropwise to a sample using a disposable plastic Beral pipet. We
recommend using 0.25 M magnesium acetate solution prepared in 0.5 M acetic
acid solution as the ISA for the Ammonium ISE. To prepare this solution,
dissolve 53.6 grams of magnesium acetate in sufficient 0.5 M acetic acid
solution to make 1.0 liter. Commonly, ISA is added in a 1:50 ratio, or 1 mL of
ISA added to 50 mL of water to be tested.
For additional troubleshooting and FAQs, see
www.vernier.com/til/665
Repair Information
If you have followed the troubleshooting steps and are still having trouble with
your Go Direct Ammonium Ion-Selective Electrode, contact Vernier Technical
Support at [email protected] or call 888-837-6437. Support specialists will
work with you to determine if the unit needs to be sent in for repair. At that
time, a Return Merchandise Authorization (RMA) number will be issued and
instructions will be communicated on how to return the unit for repair.
