Delta OHM HD 9212 Manuel utilisateur

HD 9212

INSTRUCTIONS MANUAL

– 15 –

HD 9212

ENGLISH

pHMETER THERMOMETER

GENERAL CHARACTERISTICS

The instrument allows measurements of pH, mV or temperature to be ta-

ken with a passive 4-wire Pt100 probe of the series TP9...

pH measurement

It is possible to take pH measurements by connecting a pH electrode to

the instrument (Fig. 1).

While measuring pH the instrument performs temperature compensa-

tion with the set temperature

value.

pH measurement is possible

in the range from -2.00 to

16.00 pH; the work range is

from 0.00 to 14.00 pH and

the value is indicated in

hundredths of pH.

If the measurement exceeds

the indicated limits or the

electrode is not connected,

the Err code appears on the

display.

mV measurement

When a pH electrode, an

electrode for measuring the

redox potential or a specific

ion electrode is connected,

the instrument performs mV

measurement (Fig. 1).

mV measurement is in the

range ±1999 mV. The mV

resolution of the instrument is

0.1 mV in the range ±199.9

mV and 1 mV in the remain-

ing range.

If the measurement exceeds

the indicated limits or the

electrode is not connected,

the Err code appears on the

display.

ENGLISH

– 16 –

EURO S7 CAP

Fig. 1

Temperature measurement

Temperature measurements may be taken by connecting to the instru-

ment a 4-wire Pt100 probe of the series TP9... (Fig. 2).

Temperature measurement is possible in the range from -50.0°C to

-199.9°C. The resolution of the instrument is 0.1°C.

The temperature

may be displayed

in either Centi-

grade or Fahren-

heit degrees.

If no temperature

probe is fitted

(and the pH or

mV probe is fit-

ted), the compen-

sation tempera-

ture of the pH

electrode is dis-

played, the set-

ting of which is

described below.

If the temperature

measurement

exceeds the indi-

cated limits or the

electrode is not

connected, and

there is no pH or

mV probe con-

nected, the Err

code appears on

the display.

Switching the instrument on and off

The instrument is switched on and off by pressing the On/Off button.

While switching on the instrument, all the symbols light up on the dis-

play for 2 seconds (test display), and the set calibration code of the

instrument (with the messages C01, C02 or C03), used for measure-

ment, and the pH measurement value are shown.

Auto power off

The instrument is provided with an auto power off function which switch-

es it off 8 minutes after the last button has been pressed.

ENGLISH

– 17 –

Temperature

probe

67 38

Pt100

3867

Pt100

Fig. 2

Disabling auto power off

The auto power off function is disabled during switching on of the instru-

ment, by pressing simultaneously, for at least 1 second, the On/Off and

°C/°F buttons.

When the auto power off function is disabled the battery symbol flashes.

Instrument calibration code

The instrument can operate with 3 calibration or work codes (calibration

codes). These three codes are:

• C01 calibration code set in the factory, cannot be changed

• C02 calibration code for the instrument, may be changed

• C03 calibration code for the instrument plus probe, may be

changed

When the instrument is switched on, for 2 seconds it shows the previ-

ously set work code on the display with the messages C01, C02 or C03.

Changing the work code (instrument calibration code) to be used

1. Switch on the instrument, holding down the On/Off and CAL buttons

simultaneously for at least 1 second.

During this phase the auto power off function is automatically dis-

abled (the battery symbol flashes).

After performing test display, the instrument shows the CAL mes-

sage and, after a few moments, C01, C02 or C03 (depending on the

work code used previously) with the message C flashing.

2. Using the

and

buttons, select the work code that you intend to

use, C01, C02 or C03.

3. Confirm the work code by pressing the CAL button. The instrument

switches off, after having displayed the CAL message.

If you have selected a work code different from those available, the

instrument switches off but the previously set work code is not

changed.

4. Switch the instrument on again and check that the desired work code

is used.

Displaying measurements in pH or in mV

By pressing the pH/mV button it is possible to display the measurement

taken at the instrument input in pH or mV units.

The unit in which the value is measured is indicated on the display.

When switched on, the instrument is set for pH measurement.

ENGLISH

– 18 –

Displaying temperature and changing the measuring unit

By pressing the °C/°F button it is possible to display the temperature

measured (if a 4-wire Pt100 temperature probe of the series TP9... is

connected) or the pH electrode compensation temperature (if a pH elec-

trode is connected).

By pressing the °C/°F button repeatedly it is possible to display the tem-

perature in °C or in °F.

The unit chosen for measuring the temperature value is indicated on the

display.

Temperature compensation of the pH electrode

The instrument performs temperature compensation of the pH electrode

with the set temperature value.

Before measuring the pH, store the temperature of the solution to be

examined, measuring it with the 4-wire Pt100 temperature probe of the

series TP9.

The value measured and shown on the display is stored by pressing the

CAL button (the instrument shows the CAL message for a brief

moment).

On disconnecting the temperature probe and connecting the pH elec-

trode, the instrument uses the previously stored temperature value to

calculate the temperature compensation of the pH measurement.

The temperature value used for temperature compensation may be

changed at will even while taking the pH measurement. To this, pro-

ceed as follows:

1. display the compensation temperature in °C by pressing the °C/°F

button;

2. press the CAL button to enable modification of the temperature value

(the °C symbol flashes);

3. set the desired temperature value with the

and

buttons;

4. press the CAL button again to confirm and store the value, the

instrument shows the CAL message for a moment, and the °C

symbol stops flashing.

Calibration of the pH electrode

The pH electrode must be calibrated from time to time to correct losses

in efficiency of the electrode.

The instrument recognizes three calibration buffer solutions: pH 6.86 for

calibrating the offset of the electrode, and pH 4.01 or pH 9.18 for cali-

brating amplification, in a basic and acid environment respectively.

The instrument does not make automatically the compensation temper-

ENGLISH

– 19 –

ature with respect to the buffer value. The compensation must be done

manually.

Before calibrating the electrode, the compensation value of the pH elec-

trode must be set in the instrument; this is equal to the temperature

value of the buffer solutions used, and is set with a temperature probe

or directly with the

and

buttons (see the description in the previous

paragraph).

Calibration of the offset

1. Connect a pH electrode to the input of the instrument; insert the

electrode in the buffer solution at pH 6.86.

Stir the electrode in the solution so as to eliminate any air bubbles

and wait until the measurement has become stable.

2. When the measurement is stable press the CAL button.

The symbol indicating pH flashes and the display shows the desired

pH value.

3. By pressing the

and

buttons it is possible to change the pH

value until it coincides with the value of the buffer solution used, at

the set temperature for calibration of the electrode.

4. When CAL is pressed the instrument quits calibration of the offset of

the electrode and the pH symbol stops flashing. The instrument

shows the CAL message for a moment.

At this point the instrument shows a value equal to that of the buffer

solution used, at the set temperature.

Calibration of amplification

1. Insert the pH electrode in the buffer solution at pH 4.01 or pH 9.18.

Stir the electrode in the solution so as to eliminate any air bubbles.

2. When the measurement is stable press the CAL button.

The symbol indicating pH flashes and the display shows the desired

pH value, depending on the buffer solution used.

3. By pressing the

and

buttons it is possible to change the pH

value until it coincides with the value of the buffer solution used, at

the set temperature for calibration of the electrode.

4. When CAL is pressed the instrument quits calibration of amplifica-

tion. The pH symbol stops flashing. The instrument shows the CAL

message for a few moments.

At this point the instrument shows a value equal to that of the buffer

solution used, at the set temperature.

This completes calibration of the pH electrode.

ENGLISH

– 20 –

PROCEDURE FOR CALIBRATING THE INSTRUMENT

(WORK CODE C02)

Selecting the work code for calibrating the instrument

1. Switch on the instrument, holding down the On/Off and CAL buttons

simultaneously for at least 1 second.

During this

phase the auto

power off func-

tion is automati-

cally disabled

(the battery

symbol flashes).

The instrument

shows the CAL

message and,

after a few

moments, C01,

C02 or C03

(depending on

the work code

used previously)

with the mes-

sage C flashing.

2. Using the

and

buttons,

select the work

code C06.

3. Confirm the

work code by

pressing the

CAL button. The

instrument dis-

plays the work

code C02 for a

few moments.

The voltage input must be calibrated first, then the temperature

input.

Using the pH/mV button, select mV measurement to calibrate the

voltage input. First calibrate the offset (0.0 mV), the first calibration

point, and then amplification (480 mV), the second calibration point.

ENGLISH

– 21 –

Tension simulator

OUT GND

Fig. 3

First voltage calibration point

1. Connect a voltage simulator to the input of the instrument (Fig. 3);

simulate a value of 0.0 mV, that is the first calibration point.

2. When the measurement is stable press the CAL button.

The symbol indicating mV flashes and the display shows the value

0.0°C.

3. By pressing the

and

buttons it is possible to change the mV

value until it coincides with the value of the simulator (in this case a

value different from 0.0 mV must be simulated).

4. When CAL is pressed again the instrument quits calibration of the

first calibration point. The mV symbol stops flashing. The instrument

shows the CAL message for a few moments.

At this point the indication on the instrument coincides with that set

on the simulator.

Second voltage calibration point

1. At input of the instrument, simulate the second calibration point, 480

mV, or a value less than 490 mV.

2. When the measurement is stable press the CAL button.

The symbol indicating mV flashes and the display shows the value

480 mV.

3. By pressing the

and

buttons it is possible to change the mV

value until it coincides with the value of the simulator (in this case a

value different from 480 mV must be simulated).

4. When CAL is pressed again the instrument quits calibration of the

second calibration point. The mV symbol stops flashing. The instru-

ment shows the CAL message for a few moments.

At this point the indication on the instrument coincides with that set

on the simulator.

This concludes voltage calibration of the input.

By selecting display in °C it is possible to calibrate the temperature

of the instrument. First calibrate the offset (0.0°C), the first calibration

point, and then amplification (197.0°C), the second calibration point.

ENGLISH

– 22 –

First temperature calibration point

1. Connect a 4-wire Pt100 simulator to the input of the instrument

(Fig. 4); simulate a value of 0.0°C, that is the first calibration point.

2. When the measurement is stable press the CAL button.

The symbol indicating °C flashes and the display shows the value

0.0°C.

3. By pressing the

and

buttons it is possible to change the °C

value until it

coincides with

the value of the

simulator (in this

case a value dif-

ferent from

0.0°C must be

simulated).

4. When CAL is

pressed again

the instrument

quits calibration

of the first cali-

bration point.

The °C symbol

stops flashing.

The instrument

shows the CAL

message for a

few moments.

At this point the

indication on the

instrument coin-

cides with that

set on the simu-

lator.

Second temperature calibration point

1. At input of the instrument, simulate the second calibration point,

197.0°C, or a value less than 199.9°C.

2. When the measurement is stable press the CAL button.

The symbol indicating °C flashes and the display shows the value

197.0°C.

3. By pressing the

and

buttons it is possible to change the °C

value until it coincides with the value of the simulator (in this case a

value different from 197.0°C must be simulated).

ENGLISH

– 23 –

Temperature

probe

3867

Pt100

simulator

Fig. 4

Table des matières

Autres manuels Delta OHM Thermomètre

Delta OHM

Delta OHM HD2107.1 Manuel utilisateur

Delta OHM

Delta OHM HD2205.2 Manuel utilisateur

Delta OHM

Delta OHM HD2304.0 Manuel utilisateur

Delta OHM

Delta OHM HD2328 Manuel utilisateur

Delta OHM

Delta OHM HD3406.2 Manuel utilisateur

Delta OHM

Delta OHM HD2178.1 Manuel utilisateur

Delta OHM

Delta OHM HD2307.0 Manuel utilisateur

Delta OHM

Delta OHM HD2108.1 Manuel utilisateur

Delta OHM

Delta OHM HD2127.1 Manuel utilisateur

Manuels Thermomètre populaires d'autres marques

Delton

Delton 981A Manuel utilisateur

Baker

Baker MM2P Manuel utilisateur

Tarmo

Tarmo 320281 Manuel utilisateur

Citizen

Citizen CTD 504 Manuel utilisateur

TFA

TFA 14.1500 Manuel utilisateur

Vive

Vive DMD1010 Manuel utilisateur

Gotemp

Gotemp THB4002 Manuel utilisateur

GREISINGER

GREISINGER G 1202 Manuel utilisateur

Amprobe

Amprobe TMD-53W Manuel utilisateur

Trotec

Trotec BP10 Manuel utilisateur

Radiance instruments

Radiance instruments RT616 Series Manuel utilisateur

Eurolec

Eurolec IR151 Manuel utilisateur

Scaneo

Scaneo TS42B Manuel utilisateur

Sper scientific

Sper scientific 800043 Manuel utilisateur

Microlife

Microlife NC 200 Mode d’emploi

Motorola

Motorola MBP69SN Guide de configuration

The MeatStick

The MeatStick The MeatStick Manuel utilisateur

Hama

Hama TH35-A Manuel utilisateur