ADWA AD 131 Manuale utente

AD 131 and AD 132

pH/mV/Temperature

Waterproof Meters

USER MANUAL

www.adwainstruments.com

MANAD132 09/14

ADWA HUNGARY Kft.

Alsókikötõ sor 11, 6726 Szeged, Hungary

Tel. +36 62 317 878

Fax +36 62 550 610

www.adwainstruments.com

Dear Customer,

Thank you for choosing an Adwa product.

Please read carefully this manual before starting operations.

This instrument is in compliance with the EMC directive 2004/

108/EC and its standards, and Low Voltage Directive 2006/95/

EC and its standards for electrical equipments.

For additional technical information, please e-mail us at

[email protected].

WARRANTY

Adwa warrants this product to be free of defects in material

and workmanship as stated in the operating manual. If repair

or adjustment is necessary and has not been the result of

abuse, misuse or improper handling within the warranty

period, please contact your dealer or the nearest Adwa Office

for the RGA (Return Goods Authorization) number to put on

the outside of your package. Warranted service will be made

without charge. The meter is warranted for a period of 2 years,

while probes are warranted for 6 months. The warranty

period commences from the original date of sale. Warranty is

only valid when the product is used under normal conditions

and in accordance with the instruction manual. The warranty

is void if the instrument is repaired or serviced by unauthorized

personnel, not used in accordance to the instructions, or if

non-Adwa accessories such as buffer solutions, probes, etc.

are used in conjunction with the meter. Adwa will not be held

responsible for any accident whether directly or indirectly,

caused by the use of this instrument.

TABLE OF CONTENTS

Introduction ................................................................ 4

Technical Data .......................................................... 6

Front and Top Panels ................................................ 8

Operational Guide .................................................... 10

pH Calibration ......................................................... 16

Relative mV Calibration .......................................... 25

Good Laboratory Practice (GLP) ........................... 26

Setup ........................................................................ 31

Log-on-demand ........................................................ 34

Hold Function .......................................................... 39

Printing (AD132 only) ............................................. 40

Battery Replacement .............................................. 44

Temperature Calibration (for technical personnel only) 45

mV Calibration (for technical personnel only) .................. 47

PC Interface (AD132 only) .................................... 49

pH Electrode Conditioning & Maintenance ........... 50

Troubleshooting Guide ............................................. 52

Electrodes, Probes and Solutions ............................ 54

ELECTRODES, PROBES AND SOLUTIONS

AD1230B pH electrode with Epoxy body, tip protection

bottle, BNC connector with protection

sleeve and 1 m cable

AD3230B ORP electrode with Epoxy body, tip

protection bottle, BNC connector with

protection sleeve and 1 m cable

AD7662 Stainless steel temperature probe with 1 m

cable.

AD70004P pH 4.01 buffer solution, 20 ml sachet, 25 pcs.

AD7004 pH 4.01 buffer solution, 230 ml bottle

AD70007P pH 7.01 buffer solution, 20 ml sachet, 25 pcs.

AD7007 pH 7.01 buffer solution, 230 ml bottle

AD70010P pH 10.01 buffer solution, 20 ml sachet, 25 pcs.

AD7010 pH 10.01 buffer solution, 230 ml bottle

AD7061 Electrode cleaning solution, 230 ml bottle

AD70300 Electrode storage solution, 230 ml bottle

AD70000P Electrode rinsing solution, 20 ml sachet,

25 pcs.

AD7000 Electrode rinsing solution, 230 ml bottle

AD9551 Serial communication cable, 5 to 9 pins

INTRODUCTION

AD131 and AD132 are heavy-duty portable waterproof

meters for pH, ORP (Oxidation Reduction Potential) and

temperature measurements, designed to provide laboratory

results and accuracy even under harsh industrial conditions.

Main features include:

• 7 memorized buffers for pH calibration (pH 1.68, 4.01,

6.86, 7.01, 9.18, 10.01 and 12.45)

• Messages on the LCD to make the calibration easy

and accurate

• pH readings with manual or automatic temperature

compensation

• Calibration time-out alarm

• Log-on-demand

• HOLD feature to freeze stable reading on the LCD

• GLP feature to view last calibration data for pH and

relative mV

• PC interface (AD132 only)

SYMPTOMS

The meter does

not work with

temperature

probe.

The meter fails to

calibrate or gives

faulty readings.

Explicit warnings

are displayed

during pH

calibration.

At start-up the

meter displays all

LCD perma-

nently.

“Prn Eror” error

message dis-

played.

“Err xx” error

message dis-

played.

PROBLEM

Out of order

temperature probe.

Broken or out of

order pH electrode.

Dirty/broken pH

electrode, contami-

nated reference or

buffers.

One of the keys is

blocked.

Printer error.

Internal error.

SOLUTION

Replace the probe.

Replace the

electrode.

Follow displayed

instructions.

Check the

keyboard or

contact the

vendor.

Turn the meter off

and then turn it

on. If the error

persist, contact

your dealer.

Turn the meter off

and then turn it

on. If the error

persist, contact

your dealer.

Both models are supplied complete with:

•AD1230B pH electrode with double ceramic junction,

BNC connector and 1 m cable

•AD7662 stainless steel temperature probe, 1 m cable

• 1.5V AA alkaline batteries (4 pcs)

• User manual

• Connection to an external serial printer (AD132 only)

with the following specification:

• at least 16 characters/line

• baud rate 9600

• 9-pin RS232 input

TROUBLESHOOTING GUIDE

SYMPTOMS

Slow response/

excessive drift.

Readings

fluctuate up and

down (noise).

Only blinking

dashes during

pH measure-

ments.

Blinking reading

during measure-

ments.

Out of range in

the mV scale.

PROBLEM

Dirty pH electrode.

Clogged/dirty

junction. Low

electrolyte level

(for refillable

electrodes only).

Out of range in the

pH scale.

Reading out of

range or electrode

not connected.

Dry membrane/

junction.

SOLUTION

Soak in AD7000

solution for 30

minutes and then

clean the electrode.

Clean the electrode.

Refill with fresh

solution (for

refillable electrodes

only).

Make sure the pH

sample is in the

specified range.

Calibrate. Check

electrolyte level

and general state

of the electrode.

Check sample or

connect electrode.

Soak in AD70300

storage solution

for 1 h.

TECHNICAL DATA

Range -2.00 to 16.00 pH

±2000 mV

-20.0 to 120.0 °C (-4.0 to 248.0 °F)

Resolution 0.01 pH

0.1 mV (±999.9 mV) / 1 mV (outside)

0.1 °C (0.1 °F)

Accuracy ±0.01 pH

(@25 °C/77 °F) ±0.2 mV up to ±699.9 mV

±0.5 mV up to ±999.9 mV

±2 mV (outside)

±0.4 °C (±0.7 °F) excluding probe error

Relative mV Offset ± 2000 mV

pH Calibration Up to 5-point calibration,

with 7 standard buffers

(pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45)

Temperature Manual or automatic,

Compensation -20.0 to120.0 °C (-4.0 to 248.0 °F)

pH Electrode AD1230B

Temperature Probe AD7662

Log-on-demand 500 samples

Printer (AD132 only) External serial printer

PERIODIC MAINTENANCE

Inspect electrode and cable. The cable used for

connection to the instrument must be intact and there

must be no points of broken insulation on the cable or

cracks on the electrode stem or bulb. Connectors must

be perfectly clean and dry. If any scratches or cracks

are present, replace the electrode. Rinse off any salt

deposits with water.

CLEANING PROCEDURE

Soak in AD7061 general cleaning solution for approximately

30 minutes.

IMPORTANT: After performing any of the cleaning

procedures, rinse the electrode thoroughly with AD7000,

refill the reference chamber with fresh electrolyte and

soak the electrode in AD70300 storage solution for at

least 1 hour before taking measurements.

PC Interface (AD132 only) RS232 port

Input Impedance 1012 Ohm

Environment 0 to 50 °C (32 to 122 °F)

RH max. 100% non-condensing

Power Supply 4 x 1.5 V AA, alkaline battery

Battery Life Approx. 300 hours of continuous use

Auto-off User selectable: 5 minutes or disabled

Dimensions 188 x 96 x 70 mm

Weight 460 g

pH ELECTRODE CONDITIONING &

MAINTENANCE

PREPARATION PROCEDURE

Remove the pH electrode protective cap. DO NOT BE

ALARMED IF SALT DEPOSITS ARE PRESENT.

This is normal with electrodes and they will disappear

when rinsed with water.

During transport, tiny bubbles of air may form inside the

glass bulb affecting proper functioning of the electrode.

These bubbles can be removed by “shaking down” the

electrode as you would do with a glass thermometer.

If the bulb and/or junction are dry, soak the electrode in

AD70300 storage solution for at least one hour.

STORAGE PROCEDURE

To minimize clogging and assure a quick response time,

the glass bulb and the junction of the pH electrode should

be kept moist and not allowed to dry out.

Replace the solution in the protective cap with a few

drops of AD70300 storage solution .

NEVER STORE THE ELECTRODE IN DISTILLED

OR DEIONIZED WATER.

FRONT AND TOP PANELS

PC INTERFACE (AD132 only)

Data can be transferred from the instrument to the PC

using the ADSW10 Windows®compatible software

(optional).

ADSW10 also offers graphing and on-line help feature.

Data can be exported to the most popular spreadsheet

programs for further analysis.

To connect your instrument to a PC, use the AD9551

optional Adwa cable. Make sure that the instrument is

switched off and plug the cable to the instrument RS232

socket and to a serial port of your PC.

If not using the AD9551 cable, communication between

instrument and PC may be not possible, due to different

RS232 connector configuration.

conditions or contact your dealer if calibration

can not be performed.

• To return to normal measurement mode, press

CAL at any moment during calibration.

• If the calibration procedure is ended after the

600.0 mV point is confirmed, the meter returns

to normal measurement mode and stores a 2-

point calibration data.

1. Holders for probes

2. ON/OFF key, to turn the instrument ON and OFF

3. HOLD/CLR key, to freeze stable reading on the

LCD and clear calibration or logged data

4. CAL/SETUP key, to enter/exit calibration mode or

enter/exit SETUP mode

5. CFM/GLP key, to confirm value and display GLP

information

6. SHIFT key, to activate the key second function.

Press first SHIFT and then the selected key. The

SHIFT tag is displayed until the second key is pressed

7. DOWN arrow/PAPER (PAPER for AD132 only)

to manually decrease the value of temperature or

other parameters, or to pull out printer paper

8. UP arrow/PRINT (PRINT for AD132 only) key, to

manually increase the value of temperature or other

parameters, to obtain a printout or cancel printing

9. RANGE key, to select measurement range or switch

focused data

10. STORE/MRCL key, to store measured data and

enter/exit the logged data viewing mode

11. Liquid Crystal Display (LCD)

12. RS232 connector (AD132 only)

13. BNC connector for pH or ORP electrodes

14. Temperature probe socket

• Attach a mV simulator with an accuracy of ±0.1 mV

to the BNC connector on the rear panel.

• With the instrument off, press and hold the CFM &

STORE keys, then power on the instrument. The CAL

tag lights up and the secondary LCD shows 0.0 mV.

• Set the simulator to 0.0 mV. When the reading is stable

and close to the selected calibration point, the CFM

tag starts blinking.

• Press CFM to confirm and the secondary LCD will

display the second expected value (600.0 mV).

• Set the simulator to 600.0 mV. When the reading is

stable and close to the selected calibration point, the

CFM tag starts blinking.

• Press CFM to confirm. The secondary LCD will

display the third expected value (1800 mV).

• Set the simulator to 1800.0 mV. When the reading is

stable and close to the selected calibration point, the

CFM tag starts blinking.

• Press CFM to confirm. The instrument returns to

measurement mode.

Notes:

• If the reading is not close to the selected point,

the WRONG tag will blink. Verify the calibration

OPERATIONAL GUIDE

• The meter is supplied complete with four 1.5V AA

alkaline batteries. Remove the rear cover, unwrap the

batteries and install them while paying attention to the

correct polarity (see “Battery Replacement” section).

• Connect pH electrode and temperature probe to the

BNC and temperature sockets on the top of the

instrument. Slide the BNC protection sleeve to

completely cover the BNC connector.

• The temperature probe is used in conjunction with the

pH electrode to utilize the meter’s ATC capability, but

it can also be used independently to take temperature

measurements. If the probe is disconnected, the

temperature can be set manually using the arrow keys.

• Press CFM to confirm. The instrument

returns to normal measurement mode.

Notes:

• If the reading is not close to the selected

calibration point, the WRONG tag will blink.

Change the temperature probe and restart

calibration.

• Press CAL at any time to quit the procedure.

mV CALIBRATION (for technical personnel only)

The instruments are factory calibrated for mV range.

Adwa’s ORP electrodes are interchangeable and no mV

calibration is needed when they are replaced.

If measurements are not accurate, a mV recalibration

should be performed.

For an accurate recalibration, contact your dealer or the

nearest Adwa Customer Service Center, or follow the

instructions below.

A two or three-point procedure can be performed at 0.0,

600.0 and 1800 mV.

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