Hanna Instruments HI 93703 User Manual

SALES AND TECHNICAL SERVICE CONTACTS

Instruction Manual

Australia:

Tel. [phone] • Fax [phone]

China:

Tel. [phone] • Fax [phone]

Egypt:

Tel. & Fax [phone]

Germany:

Tel. [phone] • Fax [phone]

Greece:

Tel. [phone] • Fax [phone]

Indonesia:

Tel. [phone] • Fax [phone]

Japan:

Tel. [phone] • Fax [phone]

Korea:

Tel. [phone] • Fax [phone]

Malaysia:

Tel. [phone] • Fax [phone]

Singapore:

Tel. [phone] • Fax [phone]

South Africa:

Tel. [phone] • Fax [phone]

Taiwan:

Tel. [phone] • Fax [phone]

Thailand:

Tel. [phone] • Fax [phone]

Turbidity Meter with RS232

MAN93703-11R1 08/05

HI 93703-11

Portable Logging

HI9370 3-11HI

GLP

LOGGIN G

LOGGIN G

MICROP ROCESSOR

MICROP ROCESSOR

TURBID ITYMETER

TURBID ITY

METER

LOG

93703- 11

ON

OFF

CAL

CLR

READ

ALT

DATE

188

VIEW

STO

DATE

TIME

LOBAT

%

United Kingdom:

Tel. [phone] • Fax [phone]

USA:

Tel. [phone] • Fax [phone]

For e-mail contacts and complete list of Sales and
Technical offices, please see www.hannainst.com

www.hannainst.com

Dear Customer,
Thank you for choosing a Hanna product.
Please read this instruction manual carefully

before using the instrument.
This manual will provide you with the necessary

information for the correct use of the instrument.
If you need additional technical information, do

not hesitate to e-mail us at

[e-mail]

This instrument is in compliance with the
directives.

TABLE OF CONTENTS

Preliminary Examination ............................ 3

General Description.................................... 3

Principle of Operation ................................. 5

Functional Description................................ 6

Specifications ............................................ 7

Operational Guide ...................................... 8

Measurement Procedure ....................... 8

Log-on-demand ................................... 11

Cleaning Logged Data ......................... 11

Viewing Logged Data .......................... 12

Viewing and setting Date and Time ..... 12

Error Codes......................................... 13

Ensure Accurate Measurements ............. 1 4

Sources of Interference....................... 15

Cali brat ion................................................ 16

Calibration Procedure .......................... 16

Viewing Calibration Date ..................... 18

Ensure Accurate Calibration................ 18

Standard Suspension .......................... 19

Battery Replacement ............................... 20

PC Connection......................................... 21

Accessories............................................. 22

Warranty .................................................. 23

2

WARRANTY

All Hanna Instruments meters are warranted
for two years against defects in workmanship

and materials when used for their intended
purpose and maintained according to instruc­tions. This warranty is limited to repair or
replacement free of charge. Damages due to
accidents, misuse, tampering or lack of pre­scribed maintenance are not covered.

If service is required, contact the dealer from
whom you purchased the instrument. If under
warranty, report the model number, date of
purchase, serial number and the nature of the
failure. First obtain a Returned Goods Authori­zation number from the Customer Service de­partment, then return the instrument with the
Authorization # included along with shipment
costs prepaid. If the repair is not covered by the
warranty, you will be notified of the charges.

When shipping any instrument, make sure it is
properly packaged for complete protection.

All rights are reserved. Reproduction in whole
or in part is prohibited without the written
consent of the copyright owner.

Recommendations for Users

Before using this product, make sure that it is entirely suitable for the environment
in which it is used.

Operation of this instrument in residential area could cause unacceptable
interferences to radio and TV equipments, requiring the operator to take all
necessary steps to correct interferences.

Any variation introduced by the user to the supplied equipment may degrade
the instrument's EMC performance.

To avoid electrical shock, do not use this instrument when voltages at the
measurement surface exceed 24 Vac or 60 Vdc.

To avoid damages or burns, do not perform any measurement in microwave
ovens.

23

ACCESSORIES

PRELIMINARY EXAMINATION

HI 731318 Tissue for wiping cuvets (4 pcs)
HI 731321 Spare glass cuvet (4 pcs)
HI 731313 Maintenance kit: rugged

carrying case including HI
93703-0 and HI 93703-10
calibration solutions, HI 93703­50 cuvet cleaning solution, 1

tissue for wiping cuvets and 2
cuvets

HI 93703-0 AMCO-AEPA-1 @0 FTU*

calibration solution, 30 mL

HI 93703-05 AMCO-AEPA-1 @500 FTU*

calibration solution, 30 mL

HI 93703-10 AMCO-AEPA-1 @10 FTU*

calibration solution, 30 mL

HI 93703-50 Cuvet cleaning solution, 230

mL

HI 92000 Windows® compatible software
HI 920011 Serial cable for PC connection

(5 to 9-pin)

* 1 FTU = 1 NTU

22

Remove the instrument from the packing material
and examine it to make sure that no damage has
occurred during shipping. If there is any damage,
notify your Dealer.

HI 93703-11 is supplied complete with:

• Glass cuvet with cap

• Batteries (4 x 1.5V AA)

• Instruction manual

Note: Save all packing material until you are sure

that the instrument functions correctly. Any
defective item must be returned in its original
packaging with the supplied accessories.

GENERAL DESCRIPTION

With HI93703-11 turbidity measurements can
be performed with high precision in the field as
well as in the laboratory. HI93703-11 turbidity
meter is a microprocessor-based instrument
used to determine the turbidity of water and
waste-water. The meter covers a 0-1000 FTU
range in two scales: 0.00 to 50.00 FTU and 50
to 1000 FTU. The autoranging feature of the
instrument sets the appropriate range for the
measurement.
HI 93703-11 also includes a real-time clock and
log-on-demand capability. The PC
communication is made through a serial port of
your computer and the 5-pin socket on the
meter.
Note: HI 93703-11 has been designed

according to the ISO 7027 International
Standard, consequently the turbidity
measurement units are expressed in
FTU (Formazine Turbidity Unit). FTU is
identical to the other internationally
recognized unit: NTU (Nephelometric
Turbidity Unit).

3

The meter is housed in a rugged and lightweight
case, with an easy-to-read LCD.

To save battery-life, the instrument is equipped
with an automatic shut-off feature which is
activated after 5-minutes of non-use. This fea­ture is disabled when the meter is connected to
the serial port of the computer.

All operations can be carried out with only five
keys and troubleshooting functions can be
performed with displayed error code guides.

A positive-locking system guarantees that the
cuvet is firmly placed in the cell.

The keypad is water-resistant and can be wiped
with a moist cloth for quick cleanups.

Two or three point calibration (0,10, 500 FTU*)
can be easily performed using available stan­dards, and the last calibration date is auto­matically stored for future retrivial.

We have chosen 10 FTU * as the standard
calibration point because it best fits the
water turbidity measurements in different
applications, from drinking water to waste­water treatment.

HANNA instruments® uses the primary stan­dard AMCO-AEPA-1 to avoid all formazine­related problems. Formazine is a toxic, un­stable substance, which requires particular care:
its standards have to be prepared only a few
minutes before performing the calibration, and
cannot be reused because of their short life.
HANNA instruments® standards are extremely
stable, can be reused, and last up to six
months, if free from contamination.

HI 93703-11 can be used with both standards.

Battery replacement must only take place in a
safe area and using 1.5V AA alkaline batteries.

To install or replace the
batteries, turn the unit off
and remove the battery
compartment cover on the
raer of the meter.

-

1.5V

+

-

1.5V

+

-

1.5V

1.5V

+

SCREW

+

POTS

-

Insert the new batteries
while paying attention to
the polarity.

After the batteries have been installed, close the
battery cover and make sure the gasket is in
place before tightening the 2 screws, to ensure
a watertight seal.

PC CONNECTION

To communicate with the instrument through
the HI 92000 software, use the HI 920011 cable
(optional) to connect a serial port of your com­puter to the 5 pin connector of the meter.
When connected the meter will maintain full
functionality, being able to perform a data trans­fer while the meter is being operated.

Notes:

• Serial communication is not allowed when the
meter is being calibrated.

• The auto shut-off feature is also disabled when
the meter is connected to a computer.

* 1 FTU = 1 NTU

4

21

BATTERY REPLACEMENT

PRINCIPLE OF OPERATION

All components have been selected to mini­mize current drain without compromising func­tionality. In order to minimize the battery con­sumption, the meter is equipped with an auto­shut off function which switches the meter off
after 5 minutes of non-use.

The four 1.5V batteries guarantee 60 hours of
working life (or 900 measurements).

In order to obtain accurate measurements, the
battery level is monitored every time the meter
is switched on.

LOBAT

In addition, a "LO BAT" indication will appear on
the lower right corner of the display when the
batteries are weak (<10%). All four batteries
need to be replaced.

0

%

LO BAT

When the batteries are too weak to ensure
reliable measurements, the message 0% LO
BAT appears for a few seconds, and then the
meter will automatically switch itself off. Re­place the batteries immediately.

HI 93703-11 has been designed to perform
measurements according to the ISO 7027 In­ternational Standard.

The instrument functions by passing a beam of
infrared light through a vial containing the sample
being measured.

LIGHT

DETECTOR

IR LED

EMITTED LIGHT (890 nm)

90° SCATTERED

CUVET

LIGHT

A sensor, positioned at 90° with respect to the
direction of light, detects the amount of light
scattered by the undissolved particles present
in the sample. The microprocessor converts
such readings into FTU* values.

As noted above, FTU unit is equal to the NTU
unit. However, there are other known measure­ment units for turbidity: Jackson Turbidity Unit
(JTU) based on the old method of Jackson's
candle, and Silica Unit (mg/L of SiO2). For your
reference the conversion table between these
measurement units is shown below:

JTU FTU/NTU SiO2 (mg/L)

JTU 1 19 2.5

FTU/NTU 0.053 1 0.13

SiO2 (mg/L) 0.4 7.5 1

20

* 1 FTU = 1 NTU

5

FUNCTIONAL DESCRIPTION

8

1

2

LOG LOBAT

HI 93703-11

35

4

CLRCLR

ON

OFF

CALCAL

GLPGLP

LOGGING

LOGGING

MICROPR OCESSOR

MICROPR OCESSOR

TURBIDI TYMETER

TURBIDI TY

METER

188

VIE WVIE W

STOSTO

DATEDATE

REA DREA D

ALTALT

DATE
TIME

%

6

7

1) Measurement cell
2 ) LCD (Liquid Crystal Display)

3) ON/OFF/CLR key, to turn the meter ON
and OFF, and to clear log memory

4) GLP/CAL key, to display last calibration
date & time, and to enter calibration mode

5) STO/VIEW key, to store sample after read­ing, and to view log memory

6) READ/DATE key, to perform measure­ments, and to display (toggle) current
date/time

7 ) ALT key, to activate the second functions

(second function keys in orange)

8 ) RS232 connector (5 pin)

6

• All glassware that comes into contact with
standards should be maintained clean. Wash
with the HI93703-50 cleaning solution and
rinse with HI 93703-0 or turbidity free water.

• Rinse the vial twice with 5 ml of the liquid to
be tested. This removes the effect of any
previous liquid and any dust or foreign ob­jects that may be present inside. Gently pour
the liquid down the side of the vial to reduce
air bubbles (no mixing is required when HI
93703-0 and HI 93703-10 AMCO-AEPA-1
standards are used).

• Before inserting the vial into the instrument,
wipe it with HI93703-70 or a soft, lint-free
tissue. Handle vials so that no fingerprints
can get on the areas where light passes
(approx. bottom 2 cm/1").

STANDARD SUSPENSION

Presently, there are only two recognized pri­mary standards: AMCO-AEPA-1 and formazine.
Hanna supplies HI 93703-11 with the AMCO-
AEPA-1 which has a much longer shelf life at all
concentrations (approx. six months, if free from
contamination). In addition, no special handling
or disposal is required and a much higher
stability of suspended particles has been ob­served.
On the other hand, formazine is a toxic sub­stance, generated by a known carcinogen, with
poor stability (particles flocculate and settle
quickly). Lower concentrations change value
within a few days or hours after dilution.
The consistency of HI 93703-11 readings by
using both standards has been separately es­tablished by Advanced Polymer Systems and
Hanna Instruments.
Additional documentation about the formazine
standard and more complex calibration proce­dures is available upon request.

* 1 FTU = 1 NTU

19

• After approximately
30 seconds the LCD
will display "----".

Now the instrument
is calibrated and
ready for use.

NOTE: If "ERR1" is displayed, the calibra-

tion data is maintained.

VIEWING CALIBRATION DATE

To display the last cali­bration time and date,
press the GLP button to
toggle through the date
and time. If the display
shows "FS", the instru-

HI 93703-11

CLRCLR

ON

OFF

CALCAL

GLPGLP

LOGGING

LOGGING

MICROPRO CESSOR

MICROPRO CESSOR

TURBIDIT Y

TURBIDIT YMETER

METER

VIE WVIEW

STOSTO

DATEDATE

REA DREA D

ALTALT

ment has factory calibra­tion settings loaded and
no date will be displayed.

FS

VIEWING FIRMWARE VERSION

To display the firmware version press and
hold the ON/OFF key for
approx. ten seconds
(when turning the meter
on).

HI 93703-11

CLRCLR

ON

OFF

CALCAL

GLPGLP

LOGGING

LOGGING

MICROPROC ESSOR

MICROPROC ESSOR

METER

TURBIDITY

TURBIDITYMETER

VIE WVIEW

STOSTO

DATEDATE

REA DREAD

ALTALT

The firmware version will
be displayed

V1.0

SPECIFICATIONS

Range 0.00 to 50.00 FTU *

50 to 1000 FTU *

Resolution 0.01 and 1 FTU *
Accuracy ±0.5 FTU* or

±5% of reading (whichever is greater)

Typical EMC Deviation ±2% FS
Calibration 3 point (0, 10 and 500 FTU*)
Light Source Infrared LED
Light Source Life Life of the instrument
Light Detector Silicon photocell
Data Logging 199 measurements, on-demand
PC Connection Through serial port,

using HI 920011 connection cable and

HI 92000 Windows® compatible software
Battery Type 4 x 1.5V AA alkaline batteries
Battery Life Approx. 60 hours of continuous use

or 900 measurements

Auto-off After 5 minutes of non-use
Environment 0 to 50

RH max 95% non-condensing

Dimensions 220 x 82 x 66 mm

Weight 510 g (1.1 lb.)

°

C (32 to 122°F);

(8.7 x 3.2 x 2.6")

ENSURE ACCURATE CALIBRATION

The procedure below should be carefully fol­lowed during testing and calibration:

18

* 1 FTU = 1 NTU

7

OPERATIONAL GUIDE

To prepare the instrument for taking
measurements, first install the batteries (see
Battery Replacement section on page 20) and
then turn the instrument on.

To maximize battery-life, the display is
automatically switched off after 5-minutes of
non-use. To reactivate the display, simply
press the ON/OFF key.

MEASUREMENT PROCEDURE:

HI 93703-11

CLRCLR

VIEWVIE W

• Turn the meter on by
pressing the ON/OFF
key.

ON

OFF

CALCAL

GLPGLP

LOGGING

LOGGING

MICROPROC ESSOR

MICROPROC ESSOR

METER

TURBIDITY

TURBIDITYMETER

STOSTO

DATEDATE

READREAD

ALTALT

• The meter will carry
out a self-test display­ing a full set of figures.

LOG LOBAT

188

DATE %
TIME

• The meter will carry
out a battery test show­ing in percentage the

98

ba

%

battery life left.

• If "ERR1" appearson
the LCD, please check
the standard solution.

err1

• After approximately 30 seconds the meter
will display 10.00, prompting the user to
place the 10.00 FTU standard solution in
the cuvet holder.

10.00

cl

• Place the 10.00 FTU
standard in the holder press CAL, SIP and
CL will start blinking

sip

• After approximately
30 seconds the meter
will display 500, asking the user to place
the 500 FTU buffer
solution in the cuvet
holder.

NOTE: At this point the

user can save the two point calibration
setup by pressing ALT & CAL buttons,
leaving the calibration mode.

cl

500

cl

• When the LCD dis­plays “--- -” the meter
is ready to measure.

• Fill a clean cuvet up to one quar­ter inch (0.5 cm) from its rim with
the thoroughly agitated sample.

• Allow sufficient time for bubbles
to escape before securing the cap.
Note: do not overtighten the cap.

8

1/4“

To perform a three point
calibration, place the 500
FTU standard solution in the
cuvet holder.

• Press CAL, SIP and

0.5 cm

CL will start blinking

17

sip

cl

CALIBRATION

To check the date of last calibration, simply
press the GLP/CAL key. Press again to
toggle between date and time.

To make sure that the meter is calibrated, take
a measure of a standard solution.

The instrument can be calibrated at two or three
points and a monthly calibration is recom­mended.

CALIBRATION PROCEDURE

• Turn the meter on and

wait for the display to
show "----".

NOTE: Wipe the cuvet thoroughly with a lint-

free tissue (HI 93703-70 ) before in­serting into the measurement cell.
The cuvet must be completely free of
fingerprints and other oil or dirt, par­ticularly in the area where the light
goes through (approx. the bottom
2 cm/1").

• Place the cuvet into
the cell and check
that the notch on the
cap is positioned se­curely into the
groove.

• Press the ALT & CAL
buttons together. The
"CAL" message will
blink on the display 3
times. The meter then
enters the calibration
mode, displaying "0.00
cl" and prompting the
user to insert the 0.00
FTU standard.

• Place the 0.00 FTU stan­dard in the cuvet holder

• Press CAL, SIP and
CL will start blinking

HI 93703-11

CLRCLR

VIEWV IEW

ON

STOSTO

OFF

CALCAL

DATEDATE

GLPGLP

READRE AD

LOGGING

LOGGING

ALTALT

MICROPROCE SSOR

MICROPROCE SSOR

TURBIDITY

TURBIDITYMETER

METER

0.00

cl

sip

cl

• The mark on the
cuvet cap should
point towards the
LCD.

• Press the READ key
and the LCD will dis­play a blinking “SIP”
(Sampling in Pro­cess). The turbidity
value will appear af­ter approx. 20 sec­onds.

HI 93703-11

CLRCL R

ON

OFF

CALCA L

GLPGL P

LOGGING

LOGGING

MICROPROC ESSOR

MICROPROC ESSOR

METER

TURBIDITY

TURBIDITYMETER

VIE WVI EW

STOST O

DATEDAT E

REA DR EAD

ALTALT

51

16

9

• Even though HI93703-11 covers a very
wide range of turbidity values, for very
accurate measurements of samples ex­ceeding 40FTU *, Standard Methods re­quire dilution. In such cases, the correct
amount of HI93703-0 or turbidity-free
water to be added to the sample can be
calculated as follows:

Vos = 3000 / T

where: Vos = volume of sample (mL) to be

combined with HI 93703-0 to
obtain the final volume of 100mL.

T = HI 93703 reading (exceeding

40FTU*)

E.g.:HI 93703 reading = 200 FTU *

3000 / 200 = 15 mL (Vos)
15 mL (Vos)+85 mL (HI93703-0) = 100 mL

At this point, take a sample of this solution
and measure its turbidity.

The correct turbidity value of the original
sample will be:

Tn x 100 mL / Vos = T

a

where: Tn = new HI 93703 reading

Ta = actual turbidity value of the original

sample

E.g. If Tn = 27 FTU *

Ta = 27 FTU *x100 mL / 15 mL = 180 FTU *

NOTE: Any sample taken above 1000 FTU will
show out of range by blinking "1000".

hours (the sample needs to be kept at room
temperature prior to the analysis).

• To obtain a representative sample, gently,
but thoroughly, mix it before samples are
taken. Do not shake (to prevent air bubbles)
and do not let the sample settle.

• It is recommended to calibrate the meter with
the supplied HI93703-10 @10 FTU* stan­dard at least once a month or more frequently
for greater accuracy.

• Before inserting vials into the instrument,
wipe them with HI93703 -70 or a soft, lint­free tissue. Handle vials so that no finger­prints get on the areas where light passes
(approx. the bottom 2 cm/1 inch).

If you experience any problems in taking mea­surements, contact your dealer or the nearest
Hanna Customer Service Center.

SOURCES OF INTERFERENCE

• Presence of floating debris and coarse sedi-

ments which settle out rapidly will give false
readings.

• The infrared light source used for HI 93703­11 turbidity meter, complies with the ISO

7027 International Standard and can effec­tively minimize any errors due to colored
dissolved substances. This effect, called
"true color", is a common interference for
most commercially available instruments
operating in the range of visible light.

• Air bubbles and the effect of vibrations that
disturb the surface of the sample may give
false results and should be avoided.

• Dirty glassware could also affect readings
along with scratched or dented vials.

* 1 FTU = 1 NTU

10

* 1 FTU = 1 NTU

15

• Real Time Clock

error ∗

• EEPROM error∗

• Internal communica-

err2

err3

err4

tion error∗

• Internal Bus error∗

Contact the HANNA office nearest to you.

∗

err5

LOG-ON-DEMAND:

• After taking a read-

ing, press the STO
button. The last
sample read will be
stored in memory.
The display will also
show on the bottom

HI 93703-11

CLRCLR

ON

OFF

CALCAL

GLPGLP

LOGGING

LOGGING

MICROPRO CESSOR

MICROPRO CESSOR

TURBIDIT Y

TURBIDIT YMETE R

METER

VIE WVIEW

STOSTO

DATEDATE

REA DREA D

ALTALT

right corner the reference number of the
stored sample.

NOTE: When the maximum number of samples

has been reached
(199), the LCD dis­play will show "FULL".

FULL

This is a warning that
you will be overwrit­ing the oldest sample recorded. To store the
current sample, press the STO button again
and this will overwrite the oldest sample in the
memory. All samples are shifted (reference
numbers reduced by one). Sample number
one remains the oldest sample.

ENSURE ACCURATE MEASUREMENTS

• Each time the cuvet is used, tighten the cap

to the same degree.

• Discard the sample soon after the reading is
taken to avoid permanently clouding the glass.

• All glassware used to contain the standards
and the samples should be maintained clean,
washed with the HI93703-50 cleaning solution
and rinsed with HI 93703-0 or turbidity-free
water.

• Collect the samples in clean glass or plastic
bottles, fit stoppers and perform the analysis
quickly. If necessary, store the sample in a
cool, dark place, for up to a maximum of 24

14

CLEARING LOGGED DATA:

HI 93703-11

• Press the ALT &
CLR buttons to­gether. The display
will show "CLR" for
confirmation. Press

CLRC LR

ON

OFF

CALC AL

GLPG LP

LOGGING

LOGGING

MICROPROC ESSOR

MICROPROC ESSOR

METER

TURBIDITYMETER

TURBIDITY

VIE WVI EW

STOS TO

DATEDAT E

REA DREAD

ALTALT

ALT & CLR again to
clear memory. To
abort the operation,
press any button.

CLR

LOG

ALL SAMPLES PREVIOUSLY STORED
WILL BE ERASED FROM MEMORY!

11

VIEWING LOGGED DATA:

• Press the ALT & VIEW

buttons together. The
last sample will be dis­played.

• Press the right arrow to
scroll between turbidity
value, date and time of
the sample.

• Press the UP/DOWN
arrows to view the
samples and use the
right arrow to scroll the
date and time .

HI 93703-11

CLRCLR

ON

OFF

CALCAL

GLPGLP

LOGGING

LOGGING

MICROPROC ESSOR

MICROPROC ESSOR

METER

TURBIDITYMETER

TURBIDITY

HI 93703-11

LOGGING

LOGGING

MICROPROC ESSOR

MICROPROC ESSOR

TURBIDITYMETER

TURBIDITY

VIEWVIE W

STOSTO

DATEDATE

READREAD

ALTALT

HI 93703-11

LOGGING

LOGGING

MICROPROC ESSOR

MICROPROC ESSOR

TURBIDITY

TURBIDITYMETER

CLRC LR

VIE WVI EW

ON

STOS TO

OFF

CALC AL

DATEDAT E

GLPG LP

REA DR EAD

ALTALT

METER

CLRC LR

ON

OFF

CALC AL

GLPG LP

METER

VIE WV IEW

STOS TO

DATEDATE

REA DREAD

ALTA LT

• Press ALT & VIEW again to exit this mode.

month and day, use UP/
DOWN to set.

• Press right arrow again
to scroll to time, use UP/
DOWN to set.

• Press right arrow again
to save and exit date
and time setup.

LOGGING

LOGGING

MICROPROC ESSOR

MICROPROC ESSOR

TURBIDITYMETER

TURBIDITY

HI 93703-11

CLRCLR

ON

OFF

CALCAL

GLPGLP

LOGGING

LOGGING

MICROPROCE SSOR

MICROPROCE SSOR

METER

TURBIDITY

TURBIDITYMETER

HI 93703-11

VIEWVI EW

STOSTO

DATEDAT E

READREA D

ALTALT

CLRC LR

ON

OFF

CALC AL

GLPG LP

METER

VIE WVI EW

STOS TO

DATED ATE

REA DREAD

ALTA LT

Note: Press ALT & DATE to leave this mode

without saving.

ERROR CODES:

Every time the meter is switched on, the Real
Time Clock and EEPROM are tested, and if an
error is found the corresponding error code will
be displayed.

VIEWING AND SETTING DATE AND TIME:

VIEWING:

• Press ALT & DATE to toggle

between date and time.

SETTING:

• Press and hold ALT & DATE

for 3-4 seconds.

• Press UP/DOWN to correct
and set the year.

• Press right arrow to scroll to

12

HI 93703-11

CLRCLR

OFF

CALCAL

GLPGLP

LOGGING

LOGGING

MICROPROCES SOR

MICROPROCES SOR

METER

TURBIDITY

TURBIDITYMETER

HI 93703-11

LOGGING

LOGGING

MICROPROCESS OR

MICROPROCESS OR

METER

TURBIDITYMETER

TURBIDITY

VIEWVIEW

ON

STOSTO

DATEDATE

READREAD

ALTALT

CLRCLR

VIEWVIEW

ON

OFF

STOSTO

CALCAL

DATEDATE

GLPGLP

READREA D

ALTALT

The list of error codes is as follows:

• NO cover error

cap

(check cuvet position)

• Calibration error

err1

(check calibration

standard value)

13