Turn the meter on
• Press the ON/OFF button. All the used seg-
ments will be visible for one second (or as
long as the button is pressed), then the meter
enter normal measurement mode.
Taking measurements
• Submerge the probe in the solution to be
tested while stirring it gently.
• The EC or TDS value automatically compen-
sated for temperature is shown on the pri-
mary LCD level while the secondary one
shows the sample temperature.
Note:
Before taking any measurement, make
sure the meter has been calibrated.
Freeze the display
• From measurement mode,
press the HOLD button. The
H tag lights up and the read-
ing is frozen on the LCD.
Press any button to return to
normal mode.
Change the temperature unit (°C/°F)
• To change the temperature measure unit,
press the HOLD button for 2 seconds.
Turn the meter off
• From measurement mode, press the ON/OFF
button.
Note:
If measurements are taken in differ-
ent samples successively, rinse the
probe thoroughly to eliminate cross-
contamination. After cleaning, rinse
the probe with some of the sample to
be measured.
OPERATIONAL GUIDE
EC / TDS CALIBRATION
For better accuracy, frequent calibration of the
tester is recommended. In addition, calibration
should be performed whenever the probe is re-
placed, after testing aggressive chemicals and
where high accuracy is required.
Calibration Procedure
• From normal measuring
mode, press the CAL button
for 2 seconds and the CAL
message appears on the LCD.
• Release the button and im-
merse the probe in a proper
calibration solution. The
CAL tag lights up to indicate
that the meter is in calibration
mode.
Note:
The calibration solution value must be
within the meter measurement range.
• Wait a few seconds for the reading to stabi-
lize, then use the CAL and HOLD buttons to
set the solution value (CAL to increase the
value, HOLD to decrease it).
• The calibration will be automatically per-
formed.
• To confirm the calibration,
press ON/OFF for 2 seconds.
The LCD will show the “Sto”
message and then return to
normal operation.
• To quit the procedure with-
out saving, press the ON/OFF
button. The LCD will show
the “ESC” message and then
return to normal operation.
BATTERY REPLACEMENT
When the batteries become too
weak to ensure reliable read-
ings, the “Eb” message appears
on the LCD, then the meter
turns off.
Batteries must be replaced.
Unscrew and release the
probe body. Take out the
battery compartment
and carefully replace all
four batteries while pay-
ing attention to their po-
larity.
Reattach and tighten the
probe body properly to
ensure a watertight seal.
PROBE REPLACEMENT
The probe can be easily replaced by unscrew-
ing the body as shown below.
TEMPERATURE ADJUSTMENT
These meters are factory calibrated for tempera-
ture readings, and the user can only perform an
adjustment using an accurate reference ther-
mometer.
Procedure
• From normal measuring
mode, press for 2 seconds the
CAL (first) and HOLD but-
tons until the CAL message
on the LCD is replaced by the
temperature reading.
• Release the buttons and immerse the probe
and an accurate reference thermometer into
the sample solution.
• Read the temperature measured by the refer-
ence thermometer.
• Wait a few seconds for the reading to stabi-
lize on the tester, then adjust it accordingly
with the thermometer, using the CAL and
HOLD buttons (CAL to increase the value,
HOLD to decrease it).
• To confirm press ON/OFF for 2 seconds. The
LCD will show the “Sto” message and then
return to normal operation.
• To quit the procedure without saving, press
the ON/OFF button. The LCD will show the
“ESC” message and then return to normal
operation.