Preliminary operations
Connect the 12 Vdc 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 (E.g. 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. For better accuracy, the
probe should not touch or stand close
to the walls or bottom of the sample
vessel.
The EC or TDS value automatically com-
pensated for temperature variations, is
shown on the primary LCD, while the
secondary LCD shows the temperature
of the sample.
Measurements should be taken when the stability symbol on
the top left of the LCD disappears.
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 cali-
brated.
ACCESSORIES
HI 7630 (*)
Conductivity probe with built-in tempera-
ture sensor and pipe thread 1/2’’ NPT
HI 70030P
12.88 mS/cm calibration solution, 20 mL
sachet (25 pcs)
HI 70031P
1413 µS/cm calibration solution, 20 mL
sachet (25 pcs)
HI 70032P
1382 ppm calibration solution, 20 mL
sachet (25 pcs)
HI 70038P
6.44 ppt calibration solution, 20 mL sa-
chet (25 pcs)
HI 70442P
1500 ppm calibration solution, 20 mL
sachet (25 pcs)
HI 7030M
12.88 mS/cm solution, 230 mL bottle
HI 7031M
1413 µS/cm solution, 230 mL bottle
HI 7032M
1382 ppm solution, 230 mL bottle
HI 7038M
6.44 ppt solution, 230 mL bottle
HI 70442M
1500 ppm solution, 230 mL bottle
HI 7061M
Electrode cleaning solution, 230 mL bottle
HI 70300M
Electrode storage solution, 230 mL bottle
HI 710005
12 Vdc power adapter, US plug
HI 710006
12 Vdc power adapter, European plug
HI 710013
12 Vdc power adapter, Australian plug
HI 710013
12 Vdc power adapter, South Africa plug
HI 710014
12 Vdc power adapter, UK plug
(*)
To be replaced by authorized technical personnel only.
To change the TDS factor (CONV) and the temperature
compensation coefficient
β
(BETA)
• From measurement mode, press and hold the MODE
button until “TEMP” and the current temperature unit are
displayed on the lower LCD (E.g. TEMP °C).
• Press the MODE button again to show the current conver-
sion factor (E.g. 0.50 CONV).
• Use the SET/HOLD button to change the conversion factor.
• Press the MODE button to show the current temperature
compensation coefficient
β
(E.g. 2.1 BETA).
• Use the SET/HOLD button to change the value.
• Press MODE 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 successively,
rinse the probe thoroughly with water and then with some
of the sample to be measured.
