User Guide
Instruction Manual CON 510
18
P3.4 Setting the TDS factor (In TDS Mode)
The concentration of salts dissolved in solution increases the conductivity of that
solution. This relationship varies from salt to salt and is roughly linear over a given range
for a given salt. The TDS conversion factor is the number used by the meter to convert
from conductivity to TDS.
To determine the conductivity to TDS conversion factor for your solution:
Addendum 2 lists some commonly used conversion factors.
Addendum 3 describes how to calculate the appropriate TDS conversion factor for other
solutions. You can manually set TDS conversion factor between 0.40 and 1.00; meter’s
default is 0.50.
1. From measurement mode, press SETUP key to enter into setup [SETUP] mode.
2. Use MI/▲ or MR/▼ key to scroll through the SETUP main-menus “COF P3.0” and
press ENTER key repeatedly until you come to the sub-menu Program P3.4 which
the upper display shows “tds” and “P3.4” on the lower display.
3. Press the ENTER key again to make changes to the displayed value. The upper
display shows a value and the lower display shows “tdS”.
4. Use MI/▲ or MR/▼ key to set your calculated TDS conversion factor.
5. Press the ENTER key to confirm selection and to return to the SETUP sub-menu
P3.0. Press CAL/MEAS key to return to measurement [MEAS] mode.
7.5 P4.0: Temperature
P4.1 Adjusting the Temperature Coefficient
The temperature coefficient is the amount of change in conductivity per degree of
temperature; it is expressed in percent per °C or °F. Entering the exact temperature
coefficient of your solution lets you accurately compensate temperature for almost any
solution*. You can adjust 0.0 to 10.0 % per °C or °F. Meter default is 2.1% per °C or °F.
1. From measurement mode, press SETUP key to enter into setup [SETUP] mode.
2. Use MI/▲ or MR/▼ key to scroll through the SETUP main-menu “tPr P4.0” and
press ENTER until you can view sub-menu P4.1.
3. Press ENTER key to make change to the displayed value. The upper display
shows the temperature coefficient and the lower display shows “t.CO”.
4. Press MI/▲ or MR/▼ key to set the temperature coefficient of your solution.
5. Press ENTER to confirm selection and to proceed to SETUP sub-menu P4.2.
Press CAL/MEAS key twice to return to measurement [MEAS] mode.
NOTE: If you do not know the temperature coefficient of your solution you can
determine the correct value using the formula in Addendum 3 “Calculating Temperature
Coefficients”.
SETUP
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