4
Item
Order Code
GDX-EA
CB-USB-MICRO
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.
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
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.
Federal Communication Commission Interference Statement
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC rules.
These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment
generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
FCC Caution
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) this device may not cause harmful interference and
(2) this device must accept any interference received, including interference that may cause undesired operation
RF Exposure Warning
The equipment complies with RF exposure limits set forth for an uncontrolled environment. The antenna(s) used for this transmitter must
not be co-located or operating in conjunction with any other antenna or transmitter. You are cautioned that changes or modifications not
expressly approved by the party responsible for compliance could void your authority to operate the equipment.
biological samples with high concentrations of proteins, or Tris-buffered
solutions. Do not use the sensor with hydrofluoric acid or in acid or base
solutions with a concentration greater than 1.0 molar.
When testing a Go Direct Tris-Compatible Flat pH Sensor, it is best to measure
a buffer solution because it is easier to determine if the sensor is reading
correctly. Do not test your sensor by measuring distilled water. Distilled water
can have a pH reading in the range of 5.5–7.0, due to varying amounts of
dissolved carbon dioxide. Furthermore, due to a lack of ions, the pH values
reported with the sensor in distilled water will be erratic.
If your pH Sensor is reading differently from the pH of a buffer solution (e.g.,
reads 6.7 in a buffer 7), you may simply need to calibrate the sensor. See the
Calibrating the Sensor section for more information.
If your readings are off by several pH values, the pH readings do not change
when moved from one buffer solution to a buffer solution of different pH, the
sensor was stored dry for an extended period of time, or the sensor’s response
seems slow, the problem may be more serious. A method called “shocking” can
be used to revive pH electrodes. To shock your pH Sensor, perform the
following:
1. Soak the pH Electrode for 4–8 hours in an HCl solution of 0.1 M–0.5 M.
2. Rinse off the electrode and soak the tip in freshly prepared long term storage
solution (recipe above) for 30–60 minutes.
3. Rinse the electrode and test it with buffer solutions of known pH.
Occasionally, mold will grow in the pH 4 buffer/storage solution. Mold will not
harm the electrode and can easily be removed using a mild detergent solution.
Mold growth in the storage solution can be inhibited by adding a buffer
preservative.
For additional troubleshooting and FAQs, see
Repair Information
If you have followed the troubleshooting steps and are still having trouble with
your Go Direct Tris-Compatible Flat pH Sensor, 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.
Accessories/Replacements
Item
Order Code
Electrode Storage Solution, 500 mL
PH-SS
PH-BUFCAP
Storage Solution Bottles, pkg of 5
BTL
Go Direct Flat pH BNC Electrode
GDX-FPH-BNC