User Guide

To turn the meter on
Connect the 12VDC adapter to the meter and to the mains;
the display will lit. Press and hold the MODE button for 2-
3 seconds. All the used segments on the LCD will be visible
for a few seconds.
To change the temperature unit
To change the temperature unit (from °C to °F), from
measurement mode, press and hold the MODE button until
TEMP and the current temperature unit are displayed on
the lower LCD. Eg. TEMP °C.
Use the SET/HOLD button to change the temperature unit,
and then press MODE button twice to return to normal
measurement mode.
To freeze the display
Press and hold the SET/HOLD button for 2-3 seconds until
HOLD appears on the secondary display.
Press either button to return to normal mode.
Taking measurements
Select either EC or TDS mode with the SET/HOLD button.
Immerse the probe in the solution to
be tested. In order to ensure better
accuracy, probe should not touch or
stand close to the walls or bottom of
the sample vessel.
The EC or TDS value automatically
compensated for temperature is shown
on the primary LCD while the second-
ary LCD shows the temperature of the
sample.
The measurements should be taken when the stability
symbol  on the top left of the LCD disappears.
To change the EC/TDS conversion factor (CONV)
and the temperature compensation coefficient
ββ
ββ
β
(BETA)
• From measurement mode, press and hold the MODE
button until TEMP and the current temperature unit are
displayed on the lower LCD. Eg. TEMP °C.
OPERATIONAL GUIDE
CALIBRATION PROCEDURE
• From measurement mode, press and hold the MODE
button until CAL is displayed on the lower LCD.
• Release the button and immerse the probe in the proper
calibration solution: HI 70031 (1413 µS/cm) for HI 993301
and HI 70030 (12.88 mS/cm) for HI 993302.
• Once the calibration has been automatically performed,
the LCD will display OK for 1 second and the meter will
return to normal measurement mode.
• Since there is a known relationship between EC and TDS
readings, it is not necessary to calibrate the meter in TDS
Note: for storing calibration data in the non-volatile memory,
turn the meter OFF and then ON again through the MODE
button.
The CAL symbol on the LCD means that the meter is
calibrated.
ACCESSORIES
HI 70030P 12.88 mS/cm @25ºC cal. solution, 20 mL sachet (25 pcs)
HI 70031P 1413 µS/cm @25ºC cal. solution, 20 mL sachet (25 pcs)
HI 70032P 1382 ppm @25ºC cal. solution, 20 mL sachet (25 pcs)
HI 70038P 6.44 ppt @25ºC cal. solution, 20 mL sachet (25 pcs)
HI 70442P 1500 ppm @25ºC cal. solution, 20 mL sachet (25 pcs)
HI 7061M Electrode cleaning solution, 230 mL bottle
HI 70300M Electrode storage solution, 230 mL bottle
HI 710005 12VDC power adapter, US plug
HI 710006 12VDC power adapter, European plug
HI 710012 12VDC power adapter, Australian plug
HI 710013 12VDC power adapter, Southern Africa plug
HI 710014 12VDC power adapter, UK plug
• Press the MODE button again to show the current
conversion factor. Eg. 0.50 CONV.
• Press the SET/HOLD button to change the conversion
factor.
• Press the MODE button to show the current temperature
compensation coefficient β. Eg. 2.1 BETA.
• Press the SET/HOLD button to change the temperature
compensation coefficient β.
• Press the MODE button to return to normal measuring
mode.
To turn the meter off
Press the MODE button while in normal measurement mode.
OFF will appear on the lower part of the display. Release
the button. The display still lit, until the power supply is
connected.
Notes:
• Before taking any measurement make sure the meter
has been calibrated.
• To clear a previous calibration, press the MODE button
after entering the calibration mode. The lower LCD will
display ESC for 1 second and the meter will return to
normal measurement mode. The CAL symbol on the LCD
will disappear. The meter will be reset to the default
calibration.
• If measurements are taken in different samples succes-
sively, rinse the probe thoroughly to eliminate
cross-contamination; and after cleaning, rinse the probe
with some of the sample to be measured.