ADWA AD1030 User guide

USER MANUAL

AD1030, AD1040, AD1200

pH /mV/ISE/Temperature

Bench Meters

www.adwainstruments.com

1

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

89/336/EEC and Low Voltage Directive 73/23/EEC for
electrical equipments.

For additional technical information, please e-mail us at
[email protected].

2

TABLE OF CONTENTS

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

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

Front and Rear Panels............................................... 8

Operational Guide ................................................... 13

pH Calibration ......................................................... 20

Relative mV Calibration ......................................... 29

ISE Calibration

Good Laboratory Practice ....................................... 35

Setup ........................................................................ 42

Log-on-demand

Hold ......................................................................... 53

Temperature Calibration
mV Calibration

Analog Output ......................................................... 59

pH Electrode Conditioning & Maintenance........... 60

Electrodes, Probes and Solutions ........................... 63

Troubleshooting Guide ........................................... 64

(AD1200 only).......................................... 30

(AD1040 and AD1200)............................ 48

(for technical personnel only) 54

(for technical personnel only) .................. 57

3

INTRODUCTION

AD1030, AD1040 and AD1200 are professional
bench meters for pH, ORP (Oxidation Reduction Po­tential), ISE (AD1200 only) and temperature
measurements. Relative mV readings are also pro­vided. Main features include:

• Up to three-point calibration with seven memorized
buffers (pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45)
and two custom buffers

• Calibration time-out alarm

• pH calibration using buffers with 0.001 resolution

• pH readings with manual or automatic temperature
compensation

• Up to 50 samples for log-on-demand (not for
AD1030)

• Two selectable alarm limits

• Large easy-to-read LCD showing the pH, ISE
(AD1200 only) or mV and temperature simulta­neously, together with graphic symbols

• HOLD feature to freeze the stable reading on the
LCD

• GLP feature (not for AD1030) to view last calibra­tion data for pH, ISE and relative mV ranges

4

Each model is supplied complete with:

• AD1131B refillable pH electrode with glass body,
BNC connector and 1 m cable

• AD7662 stainless steel temperature probe with 1 m
cable

• pH 4.01 and pH 7.01 calibration buffers (20 ml
sachet each)

• Electrode holder

• 12 Vdc power adapter

• User manual

5

TECHNICAL DA TA

Range -2.00 to 16.00 pH / -2.000 to 16.000 pH

±2000 mV

0.001 to 19999 ppm (AD1200 only)

- 20.0 to 120.0°C (- 4.0 to 248.0°F)

Resolution 0.01 pH / 0.001 pH

0.1 mV
(±999.9) / 1 mV (outside) 0.001 ppm
(0.001 to 9.999) 0.01
ppm (10.00 to 99.99) 0.1
ppm (100.0 to 999.9) 1
ppm (1000 to 19999)
(AD1200 only)

0.1°C (0.1°F)

Accuracy ±0.01 pH / ±0.002 pH

(@25°C/77°F) ±0.2 mV up to ±699.9 mV

±0.5 mV up to ±999.9 mV

± 2 mV outside

± 0.5% f.s.

for ISE (AD1200 only) ±0.4°C
(±0.7°F) (excluding probe error)

Relative mV Offset ± 2000 mV
Analog Output ± 2000 mV

6

pH Calibration Up to 3 point calibration,

with 2 custom and 7 standard buffers

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

ISE Calibration Up to two-point calibration,

(AD1200 only) 5 standard solutions available

(0.1,1,10,100,1000 ppm)

Temperature Manual or automatic,
Compensation -20.0 to120.0°C (-4.0 to 248.0°F)

pH Electrode AD1131B
Temperature Probe AD7662
Input Impedance 1012 Ohm
Log-on-demand Up to 50 samples

(AD1040 & AD1200)

Environment 0 to 50°C (32 to 122°F)

RH max. 95% non-condensing

Power Supply 12 Vdc adapter
Dimensions 230 x 180 x 50 mm
Weight 1.8 kg

7

FRONT AND REAR PANELS

Keyboard for AD1030

1. HOLD key , to freeze the stable reading on the LCD

2. Numerical keys only

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

4. Right arrow key, to toggle between parameters

while in SETUP mode (forwards), to toggle between
absolute mV and temperature while in relative mV
mode and between pH buffer and temperature while
in pH calibration mode

8

5. Up arrow key, to manually increase temperature

value or other parameters

6. CLEAR key, to clear calibration data

7. RANGE key, to select measurement unit or switch

focused data

8. SHIFT key, to activate the second function key

9. NUM LOCK key , to active numerical keys (0 to 9, ±)

10. Down arrow key, to manually decrease tempera-

ture value or other parameters

11. CFM key, to confirm values

12. CAL/SETUP key, to enter/exit calibration mode

and to enter/exit SETUP mode

13. Left arrow key , to toggle between parameters while

in SETUP mode (backwards), to toggle between ab­solute mV and temperature while in relative mV
mode and between pH buffer and temperature while
in pH calibration mode

Note: T o select second function, press first SHIFT and

then the desired key . The SHIFT tag will appear
on the LCD until the desired key is pressed.
To leave second function mode, press SHIFT
again.

9

Keyboard for AD1040 and AD1200

1. HOLD key , to freeze the stable reading on the LCD

2. Numerical keys only

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

4. Right arrow key, to toggle between parameters

while in SETUP mode (forwards), to toggle between
absolute mV and temperature while in relative mV
mode and between pH buffer and temperature while
in pH calibration mode

10

5. Up arrow key, to manually increase temperature

value or other parameters

6. CLEAR key, to clear calibration data

7. RANGE key, to select measurement unit or switch

focused data

8. SHIFT key, to activate the second function key

9. NUM LOCK key , to active numerical keys (0 to 9, ±)

10. Down arrow key, to manually decrease tempera-

ture value or other parameters

11. MEMRCL key, to recall stored value

12. CFM/GLP key , to confirm values and view GLP data

13. STORE key , to store readings (log-on-demand)

14. CAL/SETUP key , to enter/exit calibration mode and

to enter/exit SETUP mode

15. Left arrow key , to toggle between parameters while

in SETUP mode (backwards), to toggle between ab­solute mV and temperature while in relative mV
mode and between pH buffer and temperature while
in pH calibration mode

Note: To select second function, press first SHIFT and

then the desired key. The SHIFT tag will appear
on the LCD until the desired key is pressed. To
leave second function mode, press SHIFT again.

11

Front Panel

Rear Panel

1. Power adapter socket

2. Reference input socket

3. BNC connector for pH, ISE and ORP electrodes

4. Temperature probe socket

5. Analog output sockets

12

OPERATIONAL GUIDE

CONNECTIONS

• Plug the 12 Vdc adapter into the power supply socket.
Note: These instruments feature a non-volatile memory

to keep calibration data and all meter settings
even when unplugged.

• Attach the pH, ISE (AD1200 only) or ORP electrode

and the temperature probe to the appropriate sockets
on the rear panel. For electrodes with separate refer­ence, connect the reference to the proper input socket.

• Attach the analog output to the proper connectors on

the back of the instrument.

13

INSTRUMENT ST AR T-UP

Turn the instrument on by pressing the ON/OFF button.
All LCD tags are displayed and a beep is heard (if beep

is ON) while the instrument performs a self test.

The instrument will display the date on the primary LCD
and the time on the secondary LCD, and then it will
enter the same measurement range as it was at power
off.

pH MEASUREMENTS

Make sure the instrument has been calibrated before
taking pH measurements.

• Press RANGE to enter pH range.

P

ress RANGE again to change the pH

measurement resolution.

14

• Immerse pH electrode tip and tempera-

ture probe approximately 4 cm into the
solution to be tested. Allow for the elec­trode to stabilize and put the tempera­ture probe tip as close as possible to the
pH electrode.

• The pH reading is displayed on the primary LCD and

the temperature value on the secondary LCD.

• If measurements are taken successively in different

samples, it is recommended to rinse the electrode thor­oughly with deionized or tap water and then with some
of the next sample. This will prevent cross contami­nations and condition the electrode before immersing
it into the solution to be tested.

• The pH reading is affected by temperature. In order

to measure the pH accurately, the temperature effect
must be compensated for.

15

To use the ATC (Automatic Temperature Compensa­tion) capability of the instrument, connect the
temperature probe, immerse it into the sample as close
as possible to the pH electrode and wait for a few
seconds.

• If the sample solution temperature is known, MTC

(Manual Temperature Compensation) can be per­formed by disconnecting the temperature probe. The
display will show the default temperature of 25°C (or
77°F) or the last temperature reading with the °C (or
°F) tag blinking.

• The temperature can be adjusted using the arrow keys

from -20.0 to 120.0°C (or from -4.0 to 248.0°F).

AD7662

16

ORP (mV) MEASUREMENTS

Oxidation-reduction potential (REDOX) measurements
provide the quantification of the oxidizing or reducing
power of the tested sample.

T o correctly perform a redox measurement, the surface
of the ORP electrode must be clean and smooth.

• Press RANGE to enter the mV range.

• Immerse the ORP electrode tip 4 cm into

the solution to be tested and wait a few
seconds for the reading to stabilize.

• The instrument displays the mV reading on the pri-

mary LCD and the temperature on the secondary LCD.

• If reading is out of range, the closest full-scale value

will blink on the primary LCD.

17

RELA TIVE mV MEASUREMENTS

T o enter relative mV mode, press RANGE. The relative
mV reading will be displayed on the primary LCD and
the current temperature value on the secondary LCD.

Note: Press the right or left arrow key to toggle be-

tween temperature and absolute mV reading on
the secondary LCD.

The relative mV reading is equal to the difference be­tween the absolute mV input value and relative mV off­set established in the relative mV calibration.

18

ISE MEASUREMENTS (AD1200 only)

To measure the ion concentration,

the ISE mode by pressing RANGE.

• Immerse the tip of the ISE electrode 4

cm into the solution to be tested and
wait a few seconds for stable reading.

• The instrument will display the ppm

reading on the primary LCD and the
temperature on the secondary LCD.

TEMPERA TURE MEASUREMENTS

Connect the
to the appropriate socket, immerse the
probe into the solution and allow the read­ing to stabilize.

Note: The temperature can be displayed in Celsius (°C)

AD7662 temperature probe

or Fahrenheit (°F) degrees (see “Setup” section
for details).

enter

19

pH CALIBRATION

The instrument should be recalibrated:

• Whenever the pH electrode is replaced

• At least once a week

• After testing aggressive chemicals

• If the “CAL DUE” message is blinking during mea-

surement

PREPARATION

Pour small quantities of the buffer solutions into clean
beakers. If possible, use plastic or glass beakers to mini­mize any EMC interferences.

For accurate calibration and to minimize cross-contami­nation, use two beakers for each buffer solution: the first
one for rinsing the electrode and the second for calibra­tion.

If you are measuring in the acidic range, use pH 4.01 or

1.68 as second buffer. If you are measuring in the alka­line range, use 10.01/9.18 or 12.45 as second buffer.

For extended range measurements (acidic and alkaline),
perform a three-point calibration by selecting three of
the available buffers.

20

PROCEDURE

If 0.001 pH resolution is selected, each selected stan­dard buffer value can be updated accordingly with the
value of the production lot certificate at 25°C (77°F).
From calibration mode, when a standard pH buffer with

0.001 resolution is selected, press SHIFT and then
SETUP. The buffer value will start blinking and it can
be changed within a ±0.020 pH window using the ar­row keys.

The instrument allows to choose among 7 memorized
pH buffers (pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45)
and 2 custom buffers.

Custom buffers allow the user to calibrate using a solu­tion with a pH value different from a standard one. Up
to two custom buffers can be set through the setup menu.
The custom buffer value can also be changed within a
±1.0 pH window around the set value.

For accurate measurements it is recommended to per­form a three-point calibration. However, at least a two­point calibration is suggested.

The instrument will automatically skip the buffers already
used and require a minimum difference of 0.2 pH unit
between two buffers used for calibration.

21

A new calibration will override existing stored calibra­tion data. The slopes adjacent to the calibration points
will be reevaluated.

If the new calibration point has no correspondence in
the existing stored calibration data, it is simply added or
the instrument will ask which buffer will be replaced by
the current one.

If at least a two-point calibration has been performed
and an offset correction of the electrode is desired, keep­ing unchanged the existing slopes, perform a one-point
calibration selecting the “OFFS” option in the setup
menu. If the “Pnt” option is selected, the slopes adja­cent to the calibration points will be reevaluated.

22

THREE-POINT CALIBRATION

• Immerse the pH electrode and the tem-

perature probe approximately 4 cm into
a buffer solution of your choice (pH

1.68, 4.01, 6.86, 7.01, 10.01, 12.45, cus­tom buffer 1 or 2, if set) and stir gently .
The temperature probe should be close
to the pH electrode.

• Press CAL and the instrument will dis-

play the measured pH on the primary
LCD and the “7.01 pH” buffer on the
secondary LCD, together with CAL and
“Cal Point 1” tags.

• If necessary, press the up and down arrow keys to

select a different buffer value.

23

• The hourglass tag will blink on the LCD until the read-

ing is stable.

• When the reading is stable and close to

the selected buffer, the CFM tag ap­pears. Press the CFM key to confirm.

• The calibrated value is then displayed on the primary

LCD and the secondary LCD will display the second
expected buffer value, together with CAL and “Cal
Point 2” tags.

• After the first calibration point is confirmed, immerse

the pH electrode and the temperature probe approxi­mately 4 cm into the second buffer solution and stir
gently. The temperature probe should be close to the
pH electrode.

• If necessary, use the arrow keys to select a different

buffer value.

• The hourglass tag will blink on the LCD until the read-

ing is stable.

24

• When the reading is stable and close to the selected

buffer, “CFM” tag appears.

• Press CFM key to confirm. The cali-

brated value is then displayed on the
primary LCD and the secondary LCD
will display the third expected buffer
value.

• After the second calibration point is confirmed, im-

merse the pH electrode and the temperature probe
approximately 4 cm into the third buffer solution and
stir gently. The temperature probe should be close to
the pH electrode.

• If necessary, use the arrow keys to select a different

buffer value.

• The hourglass tag will blink on the LCD until the read-

ing is stable.

• When the reading is stable and close to the selected

buffer value, the CFM tag appears. Press the CFM
key to confirm.

• The instrument stores the calibration values and re-

turns to normal measurement mode.

25

TWO-POINT CALIBRATION

Proceed as described in the “Three-point calibration”
section and press CAL after the second calibration point
is accepted. The instrument will memorize the calibra­tion data and return to normal measurement mode.

ONE-POINT CALIBRATION

• Two setup options are available: “Pnt” and “OFFS”.

• If the “Pnt” option is selected, the adjacent slopes will

be reevaluated.

• If the “OFFS” option is selected, an electrode offset

correction is performed keeping unchanged the exist­ing slopes.

• Proceed as described in the “Three-point calibration”

section and press CAL after the first calibration point
is accepted. The instrument will memorize the single
point calibration data and return to normal measure­ment mode.

Notes:

• During calibration press RANGE or the right or left

arrow keys to toggle between pH buffer and tempera­ture reading on the secondary LCD.

26

• Each time a buffer is confirmed, the new calibration

parameters replace the old data of the corresponding
buffer.

• If current confirmed buffer has no correspondence in

the stored calibration, it will be added to the existing
calibration data. If the stored calibration is a three­point procedure, the instrument will ask which buffer
should be replaced.

Use the arrow keys to select the buffer to be replaced,
then press CFM to confirm or CAL to exit calibration
without replacing.

27

CUSTOM BUFFERS

If at least one custom buffer was set in SETUP menu, it
can be selected for calibration using the arrow keys.
Press SHIFT and then SETUP key if you want to adjust
the buffer value. The buffer value, displayed on the sec­ondary LCD, will start blinking.

Use the ARROW keys to change the buffer value.
After about 5 seconds the last change has been per-

formed, the buffer value is updated and the meter exit
from the changing mode. Press SHIFT and then SETUP
key if you want to change again the value.

Note: Custom buffer value can be adjusted in a ±1.00

pH window, around the set value.

28

CLEAR CALIBRA TION

If the CLEAR key is pressed at any time during
calibration, the “CLEAR CAL” tag lights up and the
“donE” message is displayed on the secondary LCD.

All previous calibrations are cleared and the instrument
continues the procedure. The points already confirmed
for the current calibration are not deleted.

Note: If CLEAR is pressed during the first calibration

point, the instrument returns to measurement
mode.

RELATIVE mV CALIBRATION

• Press CAL from relative mV measurement mode.

The relative mV value is displayed on the primary LCD
and the absolute mV value on the secondary LCD.

• If desired, change the displayed relative mV value

using the arrow or the numerical keys (press NUM
LOCK to activate them).

Notes:

• Press RANGE to change the resolution of the
displayed value, if possible (e.g. 199.9 will change
to 1999, while 19.9 will not change).

• If CLEAR is pressed outside NUM LOCK
mode, the displayed value is set to 0.0 mV.

29

• Press NUM LOCK again to leave the numeri­cal keys.

• When the reading is stable and the relative mV offset
is within the offset window (±2000 mV), the CFM tag
will be displayed.

• Press CFM to confirm relative mV calibration. The
instrument will return to measurement mode.

• If the absolute mV reading is out of range or the rela­tive mV offset is outside the offset window, the
WRONG tag will blink.

procedure the input value or the relative mV offset
has to be changed.

To complete the calibration

ISE CALIBRATION (AD 1200 only)

For greatest accuracy, it is recommended to calibrate
the instrument frequently.
Due to electrode conditioning time, keep the electrode
immersed for a few seconds in the solution to be tested.
To make the calibration a simple and error-free proce­dure, the user will be guided step by step during calibra­tion with easy messages on the display.

30

PREPARATION

• Set the proper ion charge through the setup item
“IonCG”.

Note: If the “undF” option is selected in setup menu,

the calibration must be a two-point procedure.
If the user try to exit the calibration mode after
confirming the first point, the “----” message ap­pears on the LCD.

• Pour small quantities of the standard solutions into clean
beakers. If possible, use plastic beakers to minimize
any EMC interferences.

• For accurate calibration and to minimize cross-con­tamination, use two beakers for each standard solu­tion, the first one for rinsing the electrode and the sec­ond for calibration.

PROCEDURE

One and two-point procedures are available, with five
memorized standard solutions: 0.1, 1.0, 10, 100, 1000 ppm.

• Press RANGE to enter the ISE mode.

31

TWO-POINT CALIBRATION

• Immerse the ISE electrode approxi­mately 4 cm into the first standard so­lution and stir gently.

• Press CAL key . The primary LCD will
display the ppm value using current off­set and slope.

• The “CAL” and “Cal Point 1” tags light up, and the

0.1 ppm standard value is shown on the secondary
LCD.

• If necessary, use the arrow keys to select a different
standard solution.

• The hourglass symbol will blink on the LCD until the
reading becomes stable.

• When the reading is stable and close to the selected
standard, the CFM tag starts blinking.

32

• Press CFM to confirm calibration.

• The calibrated value will be displayed
on the primary LCD and the second
expected standard solution on the sec­ondary LCD.

Note: The instrument will automatically skip the stan-

dard value used for the first point.

• After the first calibration point is confirmed, immerse
the ISE electrode approximately 4 cm into the second
standard solution.

• If necessary, use the arrow keys to select a different
standard solution.

• The hourglass symbol will blink on the LCD until the
reading becomes stable.

• When the reading is stable and close to the selected
standard, the CFM tag starts blinking.

• Press CFM key to confirm calibration. The instrument
stores the calibration data and returns to normal mea­surement mode.

33

Notes:

• If the mV value is out of the ±2000 mV range,
the “WRONG” and “BUFFER” tags are dis­played. Check if the correct standard has been
used, or refresh the electrode by following the
maintenance procedure described on page 60.
If necessary, change the standard solution or the
electrode.

• If the ion charge is not specified (“undF” se­lected in setup menu), the slope window is be­tween ±20 mV and ±105 mV. If a ion charge
value is set, the slope value is between 50% and
120% of the default slope for the corresponding
ion charge.
Default slope value (mV/decade):

-59.16 (monovalent anion) - ion charge is -1

59.16 (monovalent cation) - ion charge is 1

-29.58 (divalent anion) - ion charge is -2

29.58 (divalent cation) - ion charge is 2
100 - ion charge is “undF”

• To reset to the default values and clear calibra­tion data, press the CLEAR key during calibra­tion. The instrument will display the “CLR” mes­sage and return to measurement mode.

34

ONE-POINT CALIBRATION

• To perform a single point calibration,
press CAL after the first calibration
point has been confirmed.

The instrument will store the one-point calibration data
and return to normal measurement mode.

GLP (GOOD LABORATORY PRACTICE)

GLP is a set of functions that allows data storage (and
retrieval) about the electrode status and maintenance.

All data regarding pH, relative mV and ISE calibrations
are stored in the instrument memory.

CALIBRA TION TIME-OUT ALARM

The instrument allows to set the number of days (from
1 to 7) before the next required pH calibration. The de­fault setting is “OFF” (disabled).

At start-up the instrument checks if the calibration time­out has expired. If yes, the “CAL DUE” message blinks
to advise the user that a new calibration is required.

Note: If the instrument was not calibrated or all cali-

bration data were cleared, the “CAL DUE”
message is displayed even if the feature is dis­abled in the setup menu.

35

LAST pH CALIBRATION DATA

The last pH calibration data are stored automatically after
a successful calibration.

T o view the pH calibration data, from pH measurement
mode press SHIFT and then GLP key. The instrument
will display the date (yyyy.mm.dd) of the last calibra­tion.

Use the up arrow key to view all calibration parameters
in the following sequence:

• Time (hh:mm) of the last calibration.

36

• pH calibration offset value.

• pH calibration slope (the GLP slope is the average of
the calibration slopes; the percentage is referred to
the ideal value of 59.16 mV/pH).

• Calibration buffers in the order used for calibration,
together with the corresponding warnings.

37

Notes:

• The “OLd” message displayed beside a buffer
value means that this buffer was not used dur­ing last calibration. Press SHIFT and then
SETUP key to see the old calibration date (or
time, if old calibration date is the same as the
last procedure).

• Each buffer is displayed with the resolution used
during calibration.

• The “no bUF” message means that calibration
was performed at less than five points.

• Calibration time-out alarm status. The display shows
“OFF” if the feature is dis­abled, or the days remain­ing before the calibration
alarm will be activated
(e.g. 5 days), or after the
calibration is expired (e.g.

-3 days).

• The instrument ID.

38

LAST ISE CALIBRATION DATA (AD 1200 only)

Last ISE calibration data are stored automatically after
a successful calibration.

To view the ISE calibration data, from ISE measure­ment mode press SHIFT and then GLP key. The instru­ment will display the date (yyyy.mm.dd) of last calibration.

Use the up arrow key to view all logged calibration pa­rameters in the following sequence:

• ISE calibration time as in pH GLP mode.

• ISE calibration slope (mV/decade) on the primary LCD
and ion charge on the secondary LCD.

• First ISE calibration buffer on the primary LCD and
corresponding mV value on the secondary LCD.

39

• Second ISE calibration buffer on the primary LCD
and corresponding mV value on the secondary LCD.

Notes:

• If a single point calibration is performed after a
two-point calibration, the instrument will keep
the old slope.

• The “no bUF” message means that calibration
was performed at one point.

• The instrument ID as in pH GLP mode.

LAST RELATIVE mV CALIBRATION DATA

Last relative mV calibration data are stored automati­cally after a successful calibration.

To view the relative mV calibration data, from relative
mV measurement mode press SHIFT and then GLP key .

The instrument will display the date (yyyy.mm.dd) of
the last calibration.

40

Use the up arrow key to view all logged calibration pa­rameters in the following sequence:

• Relative mV calibration offset and time (hh:mm) as in
pH GLP mode.

• Instrument ID as in pH GLP mode.

Notes:

• Press SHIFT and then GLP key at any moment
to return to normal measurement mode.

• If calibration has not been performed, the “no
CAL” message will blink on the LCD.

41

SETUP

Setup mode allows viewing and modifying the following
parameters:

• Calibration time-out alarm

• One-point calibration behavior

• Custom buffer 1

• Custom buffer 2

• Ion charge (AD1200 only)

• Alarm high limit

• Alarm low limit

• Temperature measure unit

• Current date (yyyy .mm.dd)

• Current time (hh:mm)

• Keyboard beep status

• Instrument ID

• T o enter SETUP mode, from measurement mode press
SHIFT and then SETUP.

• Press CAL to change the item
value. The selected item (e.g.
hour, while setting the time)
and “CFM” tag will blink.

42

• Use the arrow keys to scroll the available values or
insert the desired value with the numerical keys.

Note: To activate the numerical keys, press NUM

LOCK. The SHIFT tag will blink. The new in­troduced digit is always the last one and all pre­vious digits will shift to left.

• T o delete the digits press CLEAR key before entering
the NUM LOCK mode.

• If another item has to be set
(e.g. minutes), press RANGE
or left/right arrow key , and the
item will start blinking.

• Use the arrow keys to scroll the available values or
insert the desired value with the numerical keys.

• Press CFM to confirm or CAL to escape.

• Use the arrow keys to select the next/previous pa­rameter.

• Press SHIFT and then SETUP to exit the setup menu
at any time.

43

The table below lists all available setup parameters, their
valid values and the factory settings (default).

Item

CAL DUE
1 Pnt
Custom C1
Custom C2
IonCG
AL.HI

AL.LO

tEMP
Date

Time
bEEP
In Id

Description

Alarm time-out
1-point cal. behavior
Custom buffer 1
Custom buffer 2
Ion charge
Alarm high limit

Alarm low limit

Temperature unit
Date (yyyy.mm.dd)

Time (hh:mm)
Beep status
Instrument ID

V alid values

OFF or 1 to 7 days
Pnt, OFFS

-2.00 to 16.00 pH

-2.00 to 16.00 pH
undF, -2, -1, 1, 2
pH, mV, Rel mV

ranges
pH, mV, Rel mV

ranges
°C, °F

2000.01.01
to 2099.12.31

00:00 to 23:59
ON, OFF
0000 to 9999

Default

OFF
Pnt
no
no
undF
no

no

°C

OFF
0000

44

Notes:

• The custom buffers can be set only with 0.001
resolution. If 0.01 pH resolution is selected dur­ing calibration, the displayed custom buffer
value will be a rounded one.

• While in setup changing mode for items calibra­tion alarm time-out, custom buffer and alarm lim­its, press CLEAR to set the selected item to the
default value.

• Refer to the table below to select the correct ion
charge for each ion type (AD1200 only):

ION CHARGE ION TYPE

-2 (divalent anion) S, CO

-1 (monovalent anion) F, Cl, Br, I, CN, SCN, ClO4, NO

+1 (monovalent cation) H, Na, K, Ag, NH

+2 (divalent cation) Mg, Ca, Ba, Cd, Cu, Pb

undf undefined ion

3

4

3

45

ALARM SETUP

• Select one of the alarm items. The displayed value
will be the one previously set.

• Press RANGE to select the range for the alarm and
the corresponding range tag will blink.

• Press the CAL key to enter setup changing mode. Set
the new value using the arrow or the numerical keys.

Notes:

• While in setup changing mode, press RANGE
to select a different resolution, if possible (e.g.
if 199.9 is displayed, by pressing RANGE the
value will change to 1999; if 19.9 is displayed,
nothing will happen if pressing RANGE).

• Pressing CLEAR key, the displayed item will be
reset to the default value (“no”).

• Press NUM LOCK key to activate the numeri­cal keys. The SHIFT tag will blink.

• Press CFM to confirm the set value.

While in normal measurement mode:

• If only the “AL.LO” item is set, the instrument will
beep when the reading is below alarm low limit.

• If only the “AL.HI” item is set, the instrument will
beep when the reading is above alarm high limit.

46

• If both alarm items are set, the instrument will beep
when the reading is above alarm high limit or below
alarm low threshold.

Note: If the “AL.HI” value is minor than or equal to

the “AL.LO” value, the WRONG tag will blink.

47

LOG-ON-DEMAND (AD1040 and AD1200)

This feature allows the user to log pH, ISE (AD1200
only) and Rel mV measurements, together with tem­perature.

Up to 50 samples can be stored into the instrument
memory.

LOGGING

T o store the current reading into memory ,
press the STORE key from measurement
mode.

The instrument displays the current date (mm.dd) on the
primary LCD, while the secondary LCD shows the
record number with the “LOG” tag blinking for a few
seconds and then the number of free locations.

48

If there are less than 6 memory locations left, the record
number and the “Lo” message will blink for a few sec­onds to alert the user, and then the number of free loca­tions is displayed.

If the logging space is full, the “FULL LOC” message
will be displayed for a few seconds together with the
“LOG” tag blinking, followed by the “FrEE 0” message.

The instrument returns to normal measurement mode.

49

VIEWING LOGGED DATA

T o retrieve the information stored, press MEMRCL from
measurement mode. If no data were logged, the “no rEC”
message blinks on the LCD.

Otherwise, the instrument displays the memorized pH,
relative mV or ppm (AD1200 only) reading, and the lot
number.

Pressing SHIFT and then SETUP key while in memory
recall mode, the secondary LCD will toggle between
the “LdM” indication and the record number. Use the
arrow keys to select a different record.

50

Press RANGE or right arrow key to scroll all logged
parameters, displayed as shown in the table below:

Parameter Primary LCD Secondary LCD

mV mV reading T emperature
TIME Hour & minutes Seconds
DATE Year Month & day
OFFSET Offset value “LdM” or record number
SLOPE Slope value “LdM” or

ion charge (ISE range)

Notes:

• To view the previous logged parameter, press
the left arrow key.

• In relative mV memory recall mode, the offset
value is not available and the display shows
dashes “----”.

• The record number is an identification number
for the logged sample.

After scrolling all logged pa­rameters, the meter displays
the “dEL” message together
with the “LdM” indication.

51

Note: Pressing SHIFT and then SETUP key, the in-

strument toggles between lot and record num­ber or all lots.

• Press CLEAR to delete the selected lot/record or all
lots.

Note: Positions remain free in the log-on-demand lot

by deleting the last logged sample or all lots.

• If the “dEL All” option was selected, all logged data
are deleted and the instrument returns to normal mea­surement mode.

• Press MEMRCL at any time to return to measure­ment mode.

52

HOLD

To freeze a stable reading on the LCD, press HOLD
key from normal measurement mode.

The “Auto” and “H” tags will blink on the LCD until the
reading stabilizes.

When the reading is stable, the “Auto” and “H” tags
stop blinking and the reading is frozen.

Press HOLD key again to return the normal measure­ment mode.

Note: Pressing RANGE the instrument will skip to the

displayed range, without leaving the HOLD
mode. The STORE key also holds HOLD mode.
Pressing MEM RCL key, SHIFT and then
SETUP or GLP, the instrument leaves the HOLD
mode and performs the selected function.

53

TEMPERATURE CALIBRATION

(for technical personnel only)

The instruments are factory calibrated for temperature.
Adwa’ s temperature probes are interchangeable and no
temperature calibration is needed when they are replaced.

If temperature measurements are not accurate, tempera­ture new calibration should be performed.

For an accurate recalibration, contact your dealer or the
nearest Adwa Customer Service Center, or follow the
instructions below.

• Prepare a vessel containing ice and water, and an­other one containing hot water at approximately 50°C
(122°F). Place insulation material around the vessels
to minimize temperature drift.

• Use a calibrated thermometer with a resolution of 0.1°C
(or 0.1°F) as reference thermometer. Connect the
supplied
ate socket on the rear panel.

• With the instrument off, press and hold the CAL & up
arrow keys, then power on the instrument. The “CAL”
tag lights up and the secondary LCD shows 0.0°C (or

32.0°F). The primary LCD will display the measured
temperature or “----”, if the reading is out of range.

AD7662 temperature probe to the appropri-

54

• Immerse the temperature probe into the vessel with
ice and water as close as possible to the reference
thermometer. Allow a few seconds for probe thermal
stabilization.

• Use the arrow keys to set the reading on the second­ary LCD to that measured by the reference thermom­eter.

• 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 50.0°C (or 122.0°F).

• Immerse the temperature probe into the second ves­sel as close as possible to the reference thermometer.
Allow a few seconds for probe thermal stabilization.

• Use the arrow keys to set the reading on the second­ary LCD to that of the hot water measured by the
reference thermometer.

• When the reading is stable and close to the selected
calibration point, the CFM tag starts blinking.

55

• Press CFM to confirm. The instrument
returns to normal measurement mode.

Note: If the reading is not close to the selected cali-

bration point, the WRONG tag will blink. Change
the temperature probe and restart calibration.

56

mV CALIBRA TION (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 1800.0 mV.

• 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).

57

• 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 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 2­point calibration data.

58

ANALOG OUTPUT

For the full range of each measurement, the analog out­put varies from - 2000 to 2000 mV.

59

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.

60

For refillable electrodes:

If the filling solution (electrolyte) is more than 2.5 cm
below the fill hole, add AD7082 electrolyte solution.

For faster response, unscrew the fill hole screw during
measurements.

STORAGE PROCEDURE

T o 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.

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.

For refillable electrodes:

61

Refill the electrode reference chamber with fresh
AD7082 electrolyte solution. Allow the electrode to
stand upright for 1 hour. Follow the storage procedure
above.

CLEANING PROCEDURE

Soak in deionized water for approximately 30 minutes.
IMPORTANT: After performing any of the cleaning

procedures, rinse the electrode thoroughly with deion­ized water, refill the reference chamber with fresh elec­trolyte and soak the electrode in AD70300 storage so­lution for at least 1 hour before taking measurements.

62

ELECTRODES, PROBES AND SOLUTIONS

AD1131B Refillable pH electrode with glass body ,

tip protection bottle, BNC connector
and 1 m cable

AD1230B pH electrode with Epoxy body, tip pro-

tection bottle, BNC connector and 1
m cable

AD3230B ORP electrode with Epoxy body, tip

protection bottle, BNC connector and
1 m cable

AD7662 Stainless steel temperature probe with

1 m cable.

AD70004P pH 4.01 buffer, 20 ml sachet, 25 pcs
AD70007P pH 7.01 buffer, 20 ml sachet, 25 pcs
AD70010P pH 10.01 buffer, 20 ml sachet, 25 pcs
AD7082 Refilling solution, 3.5M KCl, 4x30 ml
AD70300 Sorage solution, 230 ml

63

TROUBLESHOOTING GUIDE

SYMPTOM PROBLEM SOLUTION

Slow response/ Dirty pH Soak the electrode
excessive drift. electrode. tip in deionized water

for 30 min.

and then clean the

electrode .

Readings fluctuate Clogged/dirty Clean the electrode.
up and down junction. Low Refill with fresh
(noise). electrolyte level electrolyte (refillable

(refillable electrode only).
electrodes only).

The display shows Out of range in Make sure the pH
blinking dashes the pH scale. sample is in the
during pH specified range.
measurements. Recalibrate. Check

the electrolyte level
and the general state
of the pH electrode.

The display shows Reading out of Check the sample.
blinking reading range. Connect the electrode.
in measurement Electrode not
mode. connected.

Out of range in Dry membrane/ Soak in A70300
the mV scale. junction. storage solution for

at least one hour.

64

SYMPTOM PROBLEM SOLUTION

The meter does Out of order Replace the probe.
not work with temperature probe.
temperature probe.

The meter fails to Broken or out of Replace electrode.
calibrate or gives order pH electrode.
faulty readings.

Explicit warnings Dirty/broken pH Follow displayed
are displayed electrode, instructions.
during pH contaminated
calibration. reference or buffers.

At start-up the One key is Check the keyboard
meter displays full blocked. or contact
LCD permanently. the vendor.

Long beep heard Key not working
when a key is in current mode.
pressed. End of range

reached with the
arrow keys.

Digits can not be Maximum value Delete digits.
introduced with reached for
the numeric keys. corresponding range.

65

666768

ADWA INSTRUMENTS Kft.

Alsókikötõ sor 11, 6726 Szeged, Hungary

Tel. [phone]

Fax [phone]

e-mail: [email protected]

www.adwainstruments.com

MANAD1040 09/14