5
Item
Order Code
Conductivity Standard Solution (Middle, 1413 µS/cm), 500 mL
CON-MST
Conductivity Standard Solution (High, 12880 µS/cm), 500 mL
CON-HST
CB-USB-MICRO
Go Direct 300 mAh Replacement Battery
GDX-BAT-300
CB-USB-C-MICRO
Warranty
Warranty information for this product can be found on the Support tab at
General warranty information can be found at
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.
IC Statement
This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions:
(1) this device may not cause interference, and
important measurement in seawater or in estuaries where freshwater from rivers
and streams mixes with salty ocean water. The salinity level in seawater is fairly
constant, at about 35 ppt (35,000 mg/L), while brackish estuaries may have
salinity levels between 1 and 10 ppt. 5 The salinity range of Go Direct
Platinum-Cell Conductivity is 0 to 10 ppt. Seawater has a salinity of 35 ppt, so
any seawater samples will need to be diluted before making measurements with
this sensor. We recommend that you dilute seawater samples (or other samples
that initially give readings above 10 ppt) to 1/4 of their original concentration,
then multiply their measured salinity reading by 4 to obtain a final salinity
value, in ppt. Brackish water in coastal estuaries is often in the range of 0 to 10
ppt, well within the high range of the probe.
Since there is no stored salinity calibration for Go Direct Platinum-Cell
Conductivity, perform a two-point calibration using 5 ppt and 10 ppt salinity
standards. Make sure your sensor switch is on the high conductivity setting.
You will need to prepare two standard solutions to calibrate for salinity:
l
A low standard (5 ppt salinity), add 4.60 g of NaCl to enough distilled
water to prepare 1 liter of solution.
l
A high standard (10 ppt salinity), add 9.20 g of NaCl to enough distilled
water to prepare 1 liter of solution.
Determining the Concentration: Total Dissolved Solids
Because there is a nearly linear relationship between conductivity and
concentration of a specific ion or salt, Go Direct Platinum-Cell Conductivity
can be used to determine the concentration of an ion. A curve can be obtained if
you prepare or purchase standard solutions. Note in this figure the 2:1 ratio
between conductivity in µS/cm and TDS concentration in mg/L. Even though
total dissolved solids is often defined in terms of this 2:1 ratio, it should be
understood that a TDS reading of 500 mg/L can have a different meaning in a
sample that is mostly NaCl than in another sample that is composed primarily of
hard water ions such as Ca
2+
and HCO
3
-
. The relationship between conductivity
and sodium chloride concentration is approximately a 2:1 ratio and is very
nearly a direct relationship.
Repair Information
If you have watched the related product video(s), followed the troubleshooting
steps, and are still having trouble with your Go Direct Platinum-Cell
Conductivity, contact Vernier Technical Support at support@vernier.com 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
Conductivity Standard Solution (Low, 150 µS/cm), 500 mL
CON-LST
