LaMotte TDS 5 Meter - Manual (Page 5)

20 TDS 5 METER TDS 5 METER 5
The TDS 5 Meter
Conductivity is measured using a probe which contains two electrodes,
separated by a fixed distance. When a voltage is applied from the meter
across the electrodes, the ions in solution conduct a current, which flows
between the electrodes. The greater the concentration of ions in the
solution, the larger the current generated and the higher the conductivity.
Likewise, the smaller the concentration of ions, the lower the conductivity.
The meter converts the current measured to a conductivity reading. Over
time the electrodes may become dirty or fouled with contaminants from
the sample. For specific probe cleaning instructions for the TDS 5, see
Probe Care on page 17.
Conductivity/TDS measurements are very dependent on temperature. The
ability of the ions to move through the solution, and conduct the current,
is related to the temperature of the solution. As the temperature rises, the
ions move more quickly through the solution, increasing the conductivity.
As the temperature decreases, the ions move more slowly and the
conductivity decreases. Since the conductivity of the same solution can
change by as much as 2 percent per °C, accurate temperature
measurements must be made simultaneously to the conductivity reading.
The TDS 5 includes a temperature sensor within the probe to measure the
temperature. The meter has a protective rubber boot.
To make TDS readings taken at different times and places comparable,
measurements are often converted to what the TDS of the solution would
be at 25°C. The TDS 5 automatically makes this conversion before
providing a final reading.
Warranty Information
Repairs
If it is necessary to return the instrument for repair, contact LaMotte
Company at 1-800-344-3100 for a return authorization number.
Instrument Guarantee
This instrument, excluding the probe, is guaranteed to be free of defects in
material and workmanship for two years from date of original purchase. If
in that time it is found to be defective, it will be repaired or replaced
without charge, except for transportation expenses. This guarantee does
not cover the batteries.
This guarantee is void under the following circumstances:
u Operator’s negligence
u Improper application
u Unauthorized servicing
Limits of Liability
Under no circumstances shall LaMotte company be liable for loss of life,
profits, or other damages incurred through the use or misuse of their
products.
Packaging and Delivery
Experienced packaging personnel at LaMotte Company assure adequate
protection against normal hazards encountered during shipping. After the
product leaves the manufacturer, all responsibility for its safe delivery is
assured by the transporter. Damage claims must be filed immediately with
the transporter to receive compensation for damaged goods.