Hanna Instruments hi 99300 사용자 설명서

•  Connect the supplied HI 76306 probe to the DIN socket on the top of

the meter by aligning the pins and pushing in the plug. Tighten the
nut to ensure a good connection and remove the protective cap.

•  Press and hold the MODE button for 2 seconds. All the used seg-

ments of the LCD will be visible for a few seconds, followed by a
percent indication of the remaining battery life (eg. % 100 bATT).

•  Place the probe in the sample to be tested. If possible, use plastic

beakers or containers to minimize any electromagnetic interference.

•  Select either EC or TDS mode (µS or ppm unit for HI 99300, mS or

ppt unit for HI 99301) by pressing the SET/HOLD button. Tempera-
ture will always be displayed on the secondary LCD.

•  Tap the probe lightly on the bottom of the container to remove air

bubbles that may be trapped inside the tip.

•  Allow a few minutes for the thermal equilibrium to be reached, i.e. until

the instability symbol (on the top left corner of the LCD) disappears.

•  The meter will show the EC or TDS value automatically compensated

for temperature and the temperature of the sample.

•  To freeze a reading on the LCD, press and hold the SET/HOLD

button until “HOLd” appears on the secondary display.  Press either
button to return to normal mode.

•  To turn the meter OFF, press and hold the MODE button while in

normal mode. “OFF” will appear on the LCD; release the button.

• From EC 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 7031 at 1413 µS/cm for HI 99300 or HI 7030 at 12.88
mS/cm for HI 99301).

• Once the calibration has been automatically performed, the LCD will

display OK for 1 second and return to normal measurement mode.

•  The CAL symbol lights up on the LCD to indicate that the meter is

calibrated.

Note: Since there is a known relationship between the EC and TDS

reading, it is not necessary to calibrate the meter in TDS. If the
conversion factor is either 0.5 or 0.7, the meter will allow a direct
calibration in TDS by using the Hanna calibration solutions.

Note: To reset to the default calibration value, press the MODE button

after entering the calibration mode. The LCD will display ESC
for 1 second and the meter will return to normal mode. The CAL
symbol on the LCD will disappear.

While in EC or TDS measurement mode, press and hold the MODE
button until “TEMP” and the current temperature unit are displayed on
the lower LCD (eg. TEMP °C). Then:

To select the temperature unit (°C / °F)
•  Press the SET/HOLD button to change the temperature unit, and

then press the MODE button three times, until the meter returns to
normal measurement mode.

To change the EC/TDS conversion factor (CONV) and the tem-
perature compensation coefficient (BETA)
• Press the MODE button again to show the current conversion factor

(eg. 0.50 CONV), then press SET/HOLD to change the value.

• Press the MODE button to show the current  temperature compen-

sation coefficient 

β 

(eg. 2.1 BETA), then press SET/HOLD to change

the temperature coefficient value.

• Press the MODE button return to normal operation.

The meter displays the remaining battery percentage every time it is
turned on. When the battery level is below 5%, the battery symbol
lights up on the LCD to indicate a low battery condition. If the battery
level is so low as to cause erroneous reading, the Battery Error Pre-
venting System (BEPS) will automatically turn the meter off.
To change the batteries, remove the 4 screws located on the back of
the meter and carefully replace all the 4 batteries while paying attention
to their polarity. Reattach the back making sure that the gasket is in
place and tighten the 4 screws to ensure a watertight seal.

EC/TDS probe with built-in temperature sensor, DIN
connector and 1 m cable

12.88 mS/cm solution, 20 ml sachet (25 pcs)

12.88 mS/cm solution, 230 ml bottle

1413 µS/cm solution, 20 ml sachet (25 pcs)

1413 µS/cm solution, 230 ml bottle

1382 ppm solution, 20 ml sachet (25 pcs)

1382 ppm solution, 230 ml bottle

1500 ppm solution, 20 ml sachet (25 pcs)

1500 ppm solution, 230 ml bottle

6.44 ppt solution, 20 ml sachet (25 pcs)

6.44 ppt solution, 230 ml bottle

Shockproof rubber boot, blue color

Shockproof rubber boot, orange color