Hanna Instruments hi 933700 用户手册

SPECIFICATIONS

HI933700

Range 0 to 2000 µS/cm (HI 933700/1, HI933700/2);

0 to 4000 µS/cm (HI 933700/3, HI933700/4).

Accuracy (@ 20°C/68°F)

±5% f.s.

Setpoint

Adjustable from 0 to 100% f.s.

Setpoint Hysteresis

±10% f.s.

Alarm

Red LED lit if EC value exceeds SP (/1, /3)

Red LED lit if EC value is lower than SP (/2, /4)

Calibration

Manual with one trimmer

Probe

HI 7682 EC probe (included)

Power supply

HANNA Power Adapter (included)

Dimensions 79 x 49 x 95 mm (3.11 x 1.93 x 3.74”)
Weight

150 g (5.3 oz.)

Installation cat.

Output relay

1A max resistive load;

0.75 A max. inductive load; 250 VAC

INITIAL PREPARATION

• Connect the EC probe to the RCA

connector marked "PROBE".

• Connect the power adapter cable to

the power socket. The green front
panel LED should light.

• Connect the relay output contacts using the terminal NC

or NO according to your needs.

• Immerse the EC probe in the solution,

making sure that metal pins are com-
pletely submerged.

Note: the probe tip should be completely

submerged in the solution. More-
over, in order not to affect the accuracy of
measurements, it is important that the 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.
• Tap the probe gently on the bottom, then shake it while

rotating to make sure no air bubbles have remained
trapped.

• Adjust setpoint at 70%.
• Adjust the calibration trimmer

with a small screwdriver until the
output relay switches.

• Rotate the calibration trimmer in

the opposite direction until the
relay switches again.

• Adjust the calibration trimmer in

the middle of the two relay
switching points.

• 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.

For the greatest accuracy, frequent calibration of the instru-
ment is recommended.
• Turn the meter on and connect the probe.
• Pour a small quantity of

HI 7031 EC calibration
solution (for HI 933700/
1 and /2) or HI 7032
calibration solution (for
HI933700/3 and /4) in
a beaker. If possible, use
plastic beakers to minimize

any EMC interference.

CALIBRATION

ACCESSORIES

HI 7682

EC probe and 1 m (3.3’) cable

HI 70031P 1413 µS/cm (EC) calibration solution, 20 mL

sachet (25 pcs)

HI 70032P 1382 ppm/cm (EC) calibration solution, 20 mL

sachet (25 pcs)

HI 7031L 1413 µS/cm (EC) calibration sol., 460 mL

bottle

HI 7032L 1382 ppm 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

OPERATIONAL GUIDE

• Select your own set point via the front panel setting

knob.

• Immerse the tip of the EC probe

in the sample.

Note: In order not to affect the

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

• When the reading of the controller be-

comes higher or lower than the setpoint
(depending on the model), the red, front panel LED
illuminates and the output relay is activated.

PROBE MAINTENANCE

To minimize clogging and extend the life of the probe, it is
recommended that it be cleaned 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, rub the metal

pins with very fine sandpaper.

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

water and recalibrate the instrument.

CE DECLARATION

OF CONFORMITY

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

ment in which they are used.
Operation of these instruments in residential areas could cause unacceptable interfer-

ences 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 microwave ovens.
The calibration trimmer is sensitive to electrostatic discharges. It is recommended to use

antistatic screwdriver.

ISTR933700 03/98

PRINTED IN PORTUGAL