Hanna Instruments hi 983308 Manuale Utente

OPERATIONAL GUIDE

TAKING MEASUREMENTS

• Turn the meter on by connecting the 12 VDC power

adapter to the meter and to the mains.

• Immerse the EC/TDS probe in the

solution, making sure that metal
pins are completely submerged.

• The LCD will show the EC or TDS

value. Any initial variation may
be due to temperature compensa-
tion and the fact that the probe is
adjusting itself to the new sample.
Allow the reading to stabilize and
the meter will start continuous
monitoring.

ADJUSTING THE SETPOINT

With the EC and TDS meters you can select your own
setpoint and be alerted with a visual LED alarm when an
abnormal situation arises.
• Unscrew and remove the rear panel and gasket seal to

access the MEASURE/SET switch.

• Move the switch to the left (SET Mode).
• With a small screwdriver adjust the

setpoint trimmer to display the de-
sired value in the setpoint range
specified for you model.

• Make sure the switch is moved back to the

right (MEASURE Mode).

• Replace the rear panel and the gasket, ensuring the

unit is properly closed.

• Whenever the EC or TDS reading var-

ies by more than the hysteresis specified
for your model from the setpoint, the
red alarm LED will blink.

PROBE MAINTENANCE

To minimize clogging and provide longer life for the probe,
it is recommended to clean it often or at least once a month.
• Immerse the tip of the electrode in HI 7061 Cleaning

Solution for one hour.

• If a more thorough cleaning is required, brush the metal

pins with very fine sandpaper.

• After cleaning or when not in use, rinse the probe with

tap water.

Note: HI 983304 does not need cleaning when used in

pure water applications.

For the greatest accuracy, frequent calibration of the instru-

ment is recommended.
• Turn the meter on and make sure that

the MEASURE/SET switch is on the MEA-
SURE mode.

• Pour a small quantity of calibra-

tion solution* in a beaker. If
possible, use plastic beakers to

minimize any EMC interference.

1413µS/cm for HI983303; 1382ppm for HI983306;
5.00 mS/cm for HI983307; 6.44ppt for HI983308;
800ppm for HI983309.

• Immerse the EC/TDS probe in the solu-

tion, making sure that metal pins are
completely submerged.

Note: in order not to affect the accuracy of

measurements, it is important that probe body does
not touch nor stand close to the side walls of the
beaker. The tip can lay on the bottom of the beaker.

• Wait for a couple of minutes for thermal equilibrium to

be reached.

• Tap the probe gently on the bottom, then shake it

while rotating to make sure no air bubbles have
remained trapped.

CALIBRATION

• Adjust the calibration trimmer with the supplied screwdriver

until the display shows 1410µS/cm (HI 983303) or
1380ppm (HI 983306) or 5.00mS/cm (HI 983307) or
6.44ppt (HI 983308) or 800ppm (HI 983309).

• The calibration is now complete and

the instrument is ready for use.

The instrument should be recalibrated at
least once a month and after performing
probe cleaning procedure.
Note: HI 983304 does not need calibration when used in

pure water applications.

ACCESSORIES

HI 7631/2* EC/TDS “flow thru” probe with ½”NPT thread,

ATC and 2 m (6.6’) cable (HI983304)

HI 7632/2* EC/TDS “flow thru” probe with ½”NPT thread,

ATC and 2 m (6.6’) cable (HI983307/8)

HI 7634/2* EC/TDS “flow thru” probe with ½”NPT thread,

ATC and 2 m (6.6’) cable (HI983303/6/9)

HI 70031P 1,413 µS/cm (EC) calibration solution, 20 mL

sachet (25 pcs)

HI 70032P 1,382ppm (TDS) calibration solution, 20 mL

sachet (25 pcs)

HI 70038P 6.44 ppt (TDS) calibration solution, 20 mL

sachet (25 pcs)

HI 70039P 5.00 mS/cm (EC) calibration solution, 20 mL

sachet (25 pcs)

HI 70080P 800 ppm (TDS) calibration solution, 20 mL
HI 70031L 1,413 µS/cm(EC) calibration sol., 460 mL bottle
HI 7039L 5.00 mS/cm(EC) calibration sol., 460 mL bottle

HI 7061L Electrode cleaning solution, 460 mL bottle

HI 710005 12 VDC power adapter, US plug

HI 710006 12 VDC power adapter, European plug

HI 710012 12 VDC power adapter, Australian plug

HI 710013 12 VDC power adapter, Southern Africa plug

HI 710014 12 VDC power adapter, UK plug

* To be replaced only by authorized service technicians

CE DECLARATION

OF CONFORMITY

Recommendations for Users
Before using these products, make sure that they are entirely suitable

for the environment in which they are used. Operation of these instru-
ments in residential areas could cause unacceptable interferences to

radio and TV equipment. The metal band at the end of the probe is

sensitive to electrostatic discharges. Avoid touching this metal band at
all times. During operation, ESD wrist straps should be worn to avoid

possible damage to the probe by electrostatic discharges. Any variation

introduced by the user to the supplied equipment may degrade the
instrument’s EMC performance.
To avoid electrical shock, do not use these instruments when voltages at
the measurement surface exceed 24 VAC or 60 VDC. Use plastic beakers

to minimize any EMC interferences.
To avoid damages or burns, do not perform any measurement in micro-
wave ovens.

ISTR9833R2 07/98

PRINTED IN PORTUGAL