Lutron Electronics PH-321M Manuale utente

pH MONITOR

Model : PH-321M

L11'i.u1ron PH-321 M

ENTER

,,,,,

I.LI LI

••

PH METER:

Your purchase of this pH

monitor marks a step

forward for you into the

field of precision

measurement. Although

this pH monitor is a

complex and delicate

instrument, its durable

structure will allow many

years of use if proper

operating techniques are

developed. Please read the

following instructions

carefully and always keep

this manual within easy

reach.

UKAS

QUALITY

,\\ANAGCM(NT

005

OPERATION MANUAL

Your purchase of this

pH monitor marks a

step forward for you into

the eld of precision

measurement. Although

this pH monitor is a

complex and delicate

instrument, its durable

structure will allow many

years of use if proper

operating techniques are

developed. Please read

the following instructions

carefully and always

keep this manual within

easy reach.

2 3

TABLE OF CONTENTS

FEATURES.......................................................................... 3

SPECIFICATIONS .............................................................. 3

FRONT PANEL DESCRIPTIONS ...................................... 5

Display ............................................................................... 5

CAL (Enter) Button............................................................. 5

ESC Button ........................................................................ 5

▼ Button............................................................................ 5

pH Electrode BNC Socket ................................................. 5

DC 9V Input Socket ........................................................... 5

Stick Sponge Fix Position .................................................. 5

Hanging Hall ...................................................................... 5

pH CALIBRATING PROCEDURE ........................................ 6

Calibrating Considration .................................................... 6

Requiring Equipment for Calibration.................................. 6

Calibration Procedures ...................................................... 6

Calibration Clear ................................................................ 9

MEASURING PROCEDURES......................................... 10

OPTIONAL ACCESSORIES .............................................11

FEATURES

• Economical cost digital pH meter General purpose

applications. Easy operation.

• Back light LCD display.

• Auto calibration.

• Compact size, light weight.

• Avaialble for wide applications, such as AQUARIUM,

BEVERAGE, FISH HATCHERIES, FOOD PROCESSING,

PHOTOGRAPHY, LABORATORY, QUALITY CONTROL,

SCHOOL & COLLEGES, SWIMMING POOLS, WATER

CONDITONS.

SPECIFICATIONS

Display LCD size : 31 mm x 31 mm.

LCD with back light, easy read.

Measurement

Range

0 to 14 pH x 0.01 pH

Resolution 0.01 pH

Accuracy ± 0.07 pH (pH 5 - pH 9).

± 0.1 pH (pH 4 - pH 10).

± 0.2 pH (pH 1 - pH 3.9, pH 10.1 - pH 13).

* Main instrument only

Input

Impedance

10^12 ohms.

Temperature

Compensation

Not necessary to make adjustment.

Sampling Time Approx. 1 second.

Operating

Temperature

0°C to 50°C (32°F to 122°F)

Operating

Humidity

Less than 80% RH.

4 5

Calibration Automatically, calibrated by front buttons.

* pH 7 calibration.

* pH 4 calibration.

* pH 10 calibration

Power Supply DC 9V via optional external adapter

Power

Consumption

Approx. 11 mA

Dimension 89mm x 57mm x 31 mm,

(3.5 in x 2.2 in x 1.2 in).

Weight 117 g / 0.26 LB.

pH electrode

(Optional)

Any connector pH Electrode with

BNC connector.

Standard

Accessories

Instruction Manual - 1 PC

Stick sponges - 2 PC’s

Optional

Accessories

pH electrodes :

pH electrode,

Standard bu󰀨er solutions :

pH 7.0 bu󰀨er solutions,

pH 4.0 bu󰀨er solutions,

DC 9V adapter, AP-9VA

* Input voltage : 100 to 240 ACV,

50/60 Hz.

* Output voltage : Regulation DC 9V/1

Amp. rating max.

* Output plug : round 2.5 mm dia. plug.

plug converter, AP-GTU

* Convert the input plug of AP-9VA from

the Germany type to USA type

* Appearance and specifications listed in this brochure are

subject to change without notice.

FRONT PANEL DESCRIPTION

1. Display

2. CAL (Enter) button

3. ESC button

4. ▼ button

5. pH Electrode BNC Socket

6. DC 9V Input Socket

7. Stick Sponge Fix Position

8. Hanging Holes

5. 6.

6 7

pH CALIBRATING PROCEDURE

Calibrating Consideration

These pH meter already calibrated by mV signal that simu-

lated from the ideal pH Electrode mV output base on 25°C

environment. However due to

a. An ideal electrode will produce 0 mV at pH 7.00, but

most elctrodes are slightly o.

b. The measuring environment temperature may not near

25°C (15 to 35°C).

It is necessary to make the following calibration prpcedures

if the user need to keep instrument combined electrode

within accuracy.

Requiring Equipment for Calibration

1. Combination pH Electrode (optional).

2. Two bu󰀨er solutions (optional): pH 7.00 & pH 4.00

(or pH 10.00).

Calibration Procedures

pH 7.00 Calibration

1. Rinse the electrode in distilled water completely.

2. Connect the pH Electrode to the “BNC Socket” and place

electrode onto standard bu󰀨er pH 7.00 solution.

3. Power on the instrument by plugging in the DC 9V adapter

in the “DC 9V Input Socket”.

4. Press “CAL button” once, the display will show:

5. Press “ENTER button” once, the display will ashing

several time, the show 7.00 (if show 6.99, 7.01 it is

normal), now nish the pH 7.0 calibration procedures.

pH 4.00 Calibration

1. Rinse the electrode in distilled water completely.

2. Connect the pH Electrode to the “BNC Socket” and place

electrode onto standard bu󰀨er pH 4.00 solution.

3. Power on the instrument by plugging in the DC 9V adapter

in the “DC 9V Input Socket”.

4. Press “CAL button” once, the display will show:

Press “▼button” once, the display will show:

5. Press “ENTER button” once, the display will ashing

several time, the show 4.00 (or 4.00 ± 0.01), now nish

the pH 4.0 calibration procedures.

8 9

pH 10.00 Calibration

1. Rinse the electrode in distilled water completely.

2. Connect the pH Electrode to the “BNC Socket” and place

electrode onto standard bu󰀨er pH 10.00 solution.

3. Power on the instrument by plugging in the DC 9V adapter

in the “DC 9V Input Socket”.

4. Press “CAL button” once, the display will show:

Press “▼button” once a while with two times, the display

will show:

5. Press “ENTER button” once, the display will ashing

several time, the show 10.00 (or 4.00 ± 0.01), now nish

the pH 10.0 calibration procedures.

Calibration Consideration

• During make the Calibration if intend to exit the calibration

procedures, then just press “ESC button” will return to

normal screen.

• The calibration procedures should be executed two points

calibration (pH 7 & pH 4 or pH 7 & pH 10) and start from

the pH7 at rst, then pH4 (or pH10).

• During the calibration, the circuit will sensing solution value

automatically. If the bu󰀨er solution value already beyond 7

± 2 pH. 4 ± 2 pH, 10 ± 2 pH, the LCD will show “Err”.

• Rinse the Electrode in distilled water before change the

bu󰀨er solution.

• Repeat above calibration procedures two times at least

if possible.

• Rinse the electrode in distilled water after execute the

calibration procedures.

Calibration Clear

During execute the calibration procedures, if happen

something wrong (display Error information), the execute

the following “Calibration Clear” procedures will clear all the

existing calibration data and return to default value.

However after execute the “Calibration Clear” then make

the calibration again. If the display still show “Err” (error

information), then the “Standard solution” or the “pH

electrode” may existing problem.

1. Power on the instrument by plugging in the DC 9V adapter

into the “DC 9V Input socket”

2. Press “CAL button” once, the display will show:

10 11

Press “▼button” once a while with three times, the display

will show:

Press “ENTER button” once, the display will show following

screen once a while,

Then return to normal screen and nish the “Calibration

Clear” procedures.

MEASUREMENT PROCEDURES

After the instrument and pH electrode are calibrated, then

the unit is now ready for measuring.

1. Connect the combination pH Electrode to the “BNC socket”.

2. Power on the instrument by plugging in the DC 9V adapter

into the “DC 9v Input socket”.

3. Place the electrode into the measured solution, then the

instrument will display the pH value.

4. After make the measurement, please rinse the electrode in

distilled water.

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