Delta OHM HD 9213-R1 Manual de usuario

HD 9213-R1

INSTRUCTION MANUAL

712

HD 9213-R1

– 29 –

HD 9213-R1

ENGLISH

MICROPROCESSOR CONDUCTIVITY

METER - THERMOMETER

1LCD Display

2Battery symbol

3Symbol indicating that the reading is in milliSiemens

4Symbol indicating that the reading is in microSiemens

5Key for selecting temperature reading in °C or °F

6Key for enabling the calibration function

7Key that increases the value to be set during the para-

meter setting phase

8Symbol indicating that the temperature reading is in °F

9Symbol indicating that the temperature reading is in °C

10 ON/OFF key for switching the instrument on and off

11 Key for selecting conductivity measurement

12 Key that decreases the value to be set during the para-

meter setting phase

13 Connector for the input of the conductivity and tempera-

ture probes, DIN 45326 8-pole male connector

ENGLISH

– 30 –

OFF

RESET

OFF

ENGLISH

– 31 –

Symbols lit

besides the numbers

Key Description

All the symbols are lit for

a few seconds after swit-

ching on

The battery symbol

flashes

Switches the instrument on and off.

The instrument switches itself off

automatically about 8 minutes after

the ON/OFF key has been pressed.

It is provided with an auto power off

function.

If the °C/°F key is held down simul-

taneously with the ON/OFF key

when switching on, the AUTO

POWER OFF function is disabled

and power is supplied without inter-

ruption. To switch off, press the

ON/OFF key. The battery symbol

flashes during this function.

When switching on, one of the

three messages appears after all

the symbols. The message that

appears indicates for what type of

calibration the instrument is set, or

what type was set previously.

Next appears one of the following

messages. The message that

appears indicates for what cell con-

stant (0.1 - 1.0 - 10), if any, the

instrument is set, or what constant

was set previously.

°C

°F



CAL

ENGLISH

– 32 –

Symbols lit

besides the numbers

Key Description

Key for selecting the temperature

reading in °C or °F.

The

symbol indicates the unit

chosen.

When used in combination with

others, the key also carries out

other functions.

When this key is pressed, if a probe

for conductivity measurement is

connected, the instrument measu-

res the conductivity of the liquid

being tested, giving a reading that

may be expressed in µS or in mS.

When used in combination with

others, the key also carries out

other functions.

When pressed during conductivity

measurement, this key enables the

automatic or manual calibration

function.

These keys increase

or decrease

the value indicated on the

display when pressed during auto-

matic or manual calibration, setting

of the cell constant factor, setting of

the reference temperature of the

measurement, setting of the tempe-

rature compensation value, or cali-

bration of the instrument.

µSmS°F°C

ENGLISH

– 33 –

GENERAL INFORMATION

The HD 9213-R1 is normally supplied with the combined 4-electrode and

temperature probe SPT13.

The cell measurement area is bounded by a Pocan tube. A positioning

key, directs correctly the insertion of the tube into the probe. To clean the

probe, pull the tube along the probe axle. It is not possible to take mea-

surements without this tube.

The instrument may be fitted with 2-electrode conductivity probes with cell

constant 0.1 - 1 - 10; they may also be fitted with temperature measuring

probes of the series TP 9.. in various configurations and degrees of preci-

sion.

FUNCTIONS

1 - AUTO POWER OFF DISABLE

To disable the automatic cut-out function, proceed as follows: switch on

the instrument with the ON/OFF key, holding down the °C/°F key until

all the symbols disappear, then release the °C/°F key. The

symbol

flashes.

2 - REFERENCE TEMPERATURE 20°C or 25°C

To set the reference temperature, proceed as follows: switch on the

instrument with the ON/OFF key, holding down the CAL key until all the

symbols disappear, then release the CAL key. Using the

key,

set the desired value r20 or r25, which stand for 20°C or 25°C. To quit

this routine, press the key.

3 - SELECTING THE CELL CONSTANT

To select the cell constant for probes with 2 electrodes, proceed as fol-

lows: switch on the instrument with the ON/OFF key, holding down the

key until all the symbols disappear, then release the key. One of

the messages c 0.1, c 1.0 or c 10 appears on the display. Using the

and

keys, set the desired cell constant c 0.1, c 1.0 or c 10 which

stand for cell constant 0.1 or 1 or 10.

To quit this routine, press the  key.

CALIBRATION CODES OF THE TEMPERATURE PROBES

The instrument has 5 codes, 3 of which are used for calling calibrations

while 2 are calibration procedures. They are identified as follows:

C1: The instrument operates with the original calibration performed in the

Delta Ohm workshop. It cannot be altered.

C2: The instrument operates with temperature calibration of the instrument

alone, performed with a suitable simulator.

C3: The instrument takes measurements and operates with a certain tem-

perature probe; the calibration of instrument and probe is the one that

gives the most precise results.

C6: Procedure for calibrating the temperature section of the instrument,

performed with a suitable calibrator.

C8: Procedure for calibrating the instrument together with a certain tempe-

rature probe. The two points on the scale are calibrated with a calibra-

tion furnace.

PROCEDURE FOR ENABLING AND CALLING ONE OF

THE THREE STORED CALIBRATIONS

To select codes C1, C2 or C3, proceed as follows: switch on the instru-

ment with the ON/OFF key, holding down the key and the CAL key until

all the symbols disappear. The message CAL then appears, followed by

00; using the

and

keys, set the desired code, that is C1, C2 or C3.

Confirm by pressing the CAL key. The

symbol flashes and the CAL

message remains fixed for a few seconds; the instrument then switches off

and the procedure is complete.

PROCEDURE FOR CALIBRATING THE TEMPERATURE

SECTION OF THE INSTRUMENT AND FOR STORING

CALIBRATION

To calibrate the instrument temperature code C6, proceed as follows:

switch on the instrument with the ON/OFF key, holding down the key

and the CAL key until all the symbols disappear. The message CAL then

appears, followed by 00; using the

and

keys, set the code C6.

Press the CAL key.

ENGLISH

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Simulate 0°C at the instrument input with a suitable simulator; using the

and

keys, set on the display the correct value which corresponds to the

first calibration point.

Next simulate the second calibration point and set the correct value on the

display using the

and

keys. Press the CAL key to store the calibration

performed.

PROCEDURE FOR CALIBRATING THE INSTRUMENT

WITH ITS TEMPERATURE PROBE AND FOR STORING

THE DATA

To calibrate the instrument with its temperature probe, code C8, proceed

as follows: switch on the instrument with the ON/OFF key, holding down

the key and the CAL key until all the symbols disappear. The message

CAL then appears, followed by 00; using the

and

keys, set the code

C8.

Connect the desired temperature probe to the instrument; insert it in the

calibration furnace at 0°C corresponding to the first calibration point, then

set the correct value on the display using the

and

keys.

Insert the temperature probe in the calibration furnace for the second cali-

bration point, then set the correct value corresponding to the second cali-

bration point on the display, using the

and

keys.

Press the CAL key to store the calibration performed.

CALIBRATING THE CONDUCTIVITY SECTION OF THE

INSTRUMENT

The instrument is able to recognize two standard calibration solutions: a

0.1 - mole solution of KCl and a 0.01 - mole solution of KCl. These solu-

tions are on sale in specialized shops or they may be prepared by fol-

lowing the procedures given below. Calibration is automatic when using

one of these two solutions.

Manual calibration is possible using a standard solution with a diffe-

rent conductivity from the solution used in automatic calibration.

ENGLISH

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PREPARATION OF STANDARD CALIBRATION

SOLUTIONS

Dry the potassium chloride (KCl) at 105...120°C (221...248°F) for two

hours. For a 1-mole solution, dissolve 74.555 g KCl in one litre of demine-

ralized water with conductivity less than 3 µS/cm. For a 0.1-mole solution,

dissolve 7.456 g KCl in one litre of demineralized water with conductivity

less than 1 µS/cm. For a 0.01-mole solution, add 100 millilitres of 0.1-mole

solution to 900 millilitres of demineralized water with conductivity less than

1 µS/cm.

c0.01 M 0.1 M 1 M

T18°C 1.225 mS/cm 11.19 mS/cm 98.24 mS/cm

19°C 1.251 mS/cm 11.43 mS/cm 100.16 mS/cm

20°C 1.278 mS/cm 11.67 mS/cm 102.09 mS/cm

21°C 1.305 mS/cm 11.91 mS/cm 104.02 mS/cm

22°C 1.332 mS/cm 12.15 mS/cm 105.94 mS/cm

23°C 1.359 mS/cm 12.39 mS/cm 107.89 mS/cm

24°C 1.386 mS/cm 12.64 mS/cm 109.84 mS/cm

25°C 1.413 mS/cm 12.88 mS/cm 111.80 mS/cm

AUTOMATIC CALIBRATION

Automatic calibration is possible with a 0.1-mole (or 0.01-mole) solution of

KCl. The temperature of the solution must be between 15°C (59°F) and

30°C (86°F), otherwise the error signal “E3” appears.

a) Switch on the instrument by pressing the ON/OFF key.

b) Immerse the conductimetry cell in the sample solution so that the elec-

trodes are covered.

c) Shake the probe gently so that any air inside it will escape.

d) Press the CAL key. The conductivity value of the solution at the probe

temperature appears on the display. For example 1278 µS at 20°C

(68°F) and the µS (or mS) symbol flashes.

e) Press the CAL key again to confirm the value displayed (or adjust this

value with the

and

keys before pressing CAL again). The µS (or

mS) symbol stops flashing.

ENGLISH

– 36 –

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