User Guide

1716
FTR
1
TDS
ppm
TDS
ppm
• The meter will automatically default the
TDS factor value to 0.5 (shown on the
secondary display) every time it is turned
on.
• Change the TDS factor to the value of the
solution, by pressing the FTR key. The
TDS factor value will start blinking on the
secondary LCD.
• Enter the desired value by pressing the
numeric keys and then press the ENTER
key to confirm the value.
The stored value will be displayed and it
will stop blinking.
E.g. If you want to enter 0.9 as TDS
factor, proceed as follows:
Press the FTR key
Press .
Press 9
Press the ENTER key.
ENTER
FTR
1
%TC
.
NaCl
9
NaCl measurement mode
• By pressing the NaCl key the display will
show "NaCl" to confirm the measurement
mode.
• When using HI7686 together with HI7669/
2W all readings are automatically compen-
sated for any temperature difference. Wait
for a few minutes for the temperature sen-
sor to attain thermal equilibrium with the
test solution before taking the measure-
ment. If the temperature of the conductivity
probe and the solution is drastically apart,
a longer time should be allowed before tak-
ing readings.
• Once the measurement reading stabilizes
the measurement is complete.
• If further measurements are desired, rinse
the probe with a small amount of the next
solution and test the sample.
Total Dissolved Solids measurement mode
• By pressing the TDS key the display will
show "TDS" to confirm the measurement
mode.
NaCl
%
NaCl
9
T.D.S.
4
TDS
ppm