ADWA AD 310 User manual

USER MANUAL
AD 310 • AD410
EC • TDS and Temperature
www.adwainstruments.com
ADWA INSTRUMENTS Kft.
Alsókikötõ sor 11, 6726 Szeged, Hungary
Tel. [phone]
Fax [phone]
e-mail: [email protected]
www.adwainstruments.com
MANAD310 09/14

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 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 three years,
while probes are warranted for six 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.
27
PROBES AND SOLUTIONS
AD76309 Conductivity probe with built-in temperature
sensor, DIN connector, 1 m cable
AD70031P 1413 μS/cm EC standard solution, 20 ml
sachet, 25 pcs.
AD70030P 12.88 mS/cm EC standard solution, 20 ml
sachet, 25 pcs.
AD70032P 1382 ppm TDS standard solution, 20 ml
sachet, 25 pcs.
AD7030 12.88 mS/cm EC standard solution, 230 ml
AD7031 1413 μS/cm EC standard solution, 230 ml
AD7032 1382 ppm TDS standard solution, 230 ml
AD7033 84 μS/cm EC standard solution, 230 ml
AD7039 5000 μS/cm EC standard solution, 230 ml
AD7034 80.00 mS/cm EC standard solution, 230
ml
AD7035 111.80 mS/cm EC standard solution, 230
ml

3
Introduction ................................................................ 4
Technical Data .......................................................... 6
Front and Top Panels ................................................ 8
Operational Guide .................................................... 10
Autoranging ............................................................. 13
Temperature Compensation .................................... 14
Calibration ................................................................ 16
Temperature Adjustment ........................................ 21
Setup ........................................................................ 22
Hold Function .......................................................... 24
Battery Replacement .............................................. 25
Probe Maintenance ................................................. 26
Probes and Solutions ............................................... 27
TABLE OF CONTENTS
26
PROBE MAINTENANCE
After measurements, rinse the probe with clean water.
If a more thorough cleaning is required, remove the probe
sleeve and clean the probe with a cloth or a non-abrasive
detergent.
Make sure to reinsert the sleeve onto the probe properly
and in the right direction.
After cleaning the probe, recalibrate the instrument.

4
INTRODUCTION
AD310 and AD410 are portable microprocessor-based
instruments for measuring EC or TDS, and temperature.
The autoranging feature of the EC and TDS readings
automatically sets the instrument to the scale with the
highest resolution.
Measurements are compensated for temperature
effect automatically (ATC) or manually (MTC).
The temperature compensation feature can also be
disabled to measure actual conductivity or TDS.
The temperature coefficient is user selectable.
The instruments also feature a measurement stability
indicator.
25
BATTERY REPLACEMENT
When batteries become weak,
the battery symbol lights up.
It is recommended to replace the
batteries soon.
When the battery level is too low to ensure reliable
readings, the meter automatically turns off.
Battery replacement must only take place in a safe area
and using the battery type specified in this instruction
manual.
To replace rundown batteries,
remove the battery compartment
cover on the rear of the meter and
substitute all four 1.5 V AAalkaline
batteries with new ones, while
paying attention to the correct
polarity.
Reattach the battery compartment
cover.

5
Each model is supplied complete with:
•AD76309 conductivity probe with built-in tempera-
ture sensor and 1 m cable
• Calibration solution (20 ml sachet each):
• 1413 μS/cm for AD310
• 1382 ppm for AD410
• Batteries (4 x 1.5V AA alkaline)
• Instruction manual
24
To freeze the reading on the LCD, press
the HOLD key from measurement mode.
The “H” tag lights up.
RANGE key is active while in “Hold” mode.
Press the HOLD key again to return to normal measurements.
HOLD FUNCTION

6
TECHNICAL DATA
EC Range 19.99 ; 199.9 ; 1999 μS/cm
(AD310) 19.99 ; 199.9 mS/cm
TDS Range 9.99 ; 99.9 ; 999 ppm
(AD410) 9.99 ; 99.9 ppt
Temperature Range (both models)
-9.9 to 120.0 °C
Resolution 0.01 ; 0.1 ; 1 μS/cm
0.01 ; 0.1 mS/cm
0.01 ; 0.1 ; 1 ppm / 0.01 ; 0.1 ppt
0.1 °C
Accuracy ±1% f.s. (EC and TDS)
(@25 °C/77 °F) ±0.5 °C
EC Calibration Offset: 0.0 μS/cm;
(AD310) Slope: 1 point with 6
memorized standards (84.0, 1413 μS/cm; 5.00,
12.88, 80.0, 111.8 mS/cm) or one custom value
TDS Calibration Offset: 0.0 ppm;
(AD410) Slope: 1 point with 4 memorized
standards (800, 1382 ppm; 6.44, 40.0 ppt)
or one custom value
23
Note: Press SHIFT and then SETUP key before
confirmation to escape without changing the
previously set value.
The following table lists the setup items, their valid range
and the factory settings (default):
Description
Temperature coefficient
Temp. compensation mode
Reference temperature
Cell constant (K)
Auto-off enable
Firmware release
Valid values Default
0.00 to 6.00% / ºC 1.90
Atc, Mtc, no Atc
20.0 or 25.0 ºC 25.0 ºC
0.500 to 1.700 1.000
On, Off Off
Item
tc
tcE
rEF
CEL
AoF
vEr

7
Temperature Automatic or manual,
Compensation -9.9 to 120°C
Temperature Selectable
Coefficient from 0.00 to 6.00%/°C
Reference Temperature
Selectable at 20.0 or 25.0 °C
Probe (included) AD76309
Battery Type 4 x 1.5 V AA alkaline
Battery Life Approx. 200 h of continuous use
Auto-Off User selectable: 5 min or disabled
Environment 0 to 50 °C; RH max 95%
Dimensions 70 x 145 x 26 mm
Weight Approx. 200 g
22
SETUP
Setup mode allows to view and modify the instrument
parameters.
To enter setup mode, press SHIFT and then SETUP
key from measurement mode. The “SEt” message is
displayed for a few seconds, followed by the code of the
setup item.
Select the desired setup item using the arrow keys, then
press SHIFT and then CFM to select and edit the setup
item value. Use the arrow keys to change the current
value. Press SHIFT and then CFM to confirm.

8
FRONT AND TOP PANELS
21
TEMPERATURE ADJUSTMENT
Temperature reading can be manually fine-tuned following
below instructions.
To enter the temperature adjustment,
press SHIFT and CAL keys from
temperature range. The LCD will
display the factory default temperature.
Adjust the temperature reading on the
LCD using the arrow keys. The maximum allowed
adjustment is ±1.0ºC around current reading.
Press SHIFT and CFM keys to confirm. The meter
returns to measurement mode and displays the new
temperature.
Notes:
•Press SHIFT and CAL keys to escape without
any changes.
• To enter temperature adjustment mode, the
probe must be connected and the ATC mode
must be set.

9
1. DIN connector for conductivity probe
2. ON/OFF key, to turn the instrument ON and OFF
3. RANGE/FIXED key, to select measurement unit,
and to freeze current range on the LCD
4. Up arrow/SETUP key, to manually increase the
value of temperature or other parameters, and to
enter/exit setup mode
5. Down arrow/CFM key, to manually decrease the
value of temperature or other parameters, and to
confirm values
6. HOLD/CAL key, to freeze the reading on the LCD,
and to enter/exit calibration mode
7. SHIFT key, to activate the key alternate function
(press and hold first the SHIFT key and then the
second desired key)
8. Liquid Crystal Display (LCD)
20
• When the reading is stable, the hourglass tag stops
blinking. Press SHIFT and CFM keys to confirm
calibration.
• The instrument displays the “Str” message and returns
to measurement mode.
Notes:
• The calibrated custom value is considered the
value of the calibration solution at the selected
reference temperature.
•It is possible to set the cell constant value directly,
without following the calibration procedure. To
set the cell constant enter the setup mode and
select the “CEL” item (see “Setup” section for
details).
• The temperature reading is not used during custom
calibration.

10
• Each meter is supplied complete with four 1.5 V AA
alkaline batteries. Remove the battery cover, unwrap
the batteries and install them while paying attention to
their polarity (also see “ Battery Replacement” section).
• Connect the supplied probe to the DIN connector and
tighten the threaded ring. Make sure the probe sleeve
is properly inserted.
OPERATIONAL GUIDE
19
• The “CSt” message appears for a few seconds, then
the LCD displays the not calibrated temperature
compensated EC (or TDS) reading. Pressing SHIFT
and RANGE keys, the LCD will show the temperature
compensated EC (or TDS) reading, factory calibrated
with cell value k=1. Since zero calibration is not
allowed in custom mode, if one of the above readings is
zero, the display will show “buF” message and readings
alternately.
• Using the arrow keys, adjust the displayed EC (or TDS)
measurement to the desired value.
• The maximum allowed adjustment is ± 40% around the
temperature compensated reading, factory calibrated
with cell value k=1.

11
INSTRUMENT START-UP
• Turn the instrument on by pressing the
ON/OFF button.
• At start-up the display will show all used segments for
a few seconds (or while the button is held), followed by
the reference temperature value with “rEF” indication,
then enters the measurement mode.
• To save battery life, the auto-off feature automatically
turns the meter off after 5 minutes with no button
pressed. This feature can be disabled by entering the
setup mode and selecting the “AoF” item (see “Setup”
section for details).
18
• For zero calibration, simply leave the dry probe in the air.
Notes:
• If temperature is out of range, the “buF” message
and the °C tag blink on the LCD. If the reading is
too far from the expected value, “buF” message
blinks.
• For best results calibrate using a standard value
close to the sample to be measured.
• During standard calibration the meter uses
1.90%/°C compensation coefficient. If the setup
item “tc” has been set to different value, when
exiting calibration mode, the value shown on the
LCD might be different from the nominal standard
value.
CUSTOM CALIBRATION
It is also possible to perform the EC (AD310) or TDS
(AD410) calibration using a custom solution.
• Immerse the probe into the custom calibration solution.
Press SHIFT and CAL keys to enter the calibration
and then RANGE to enter custom calibration mode.

12
TAKING MEASUREMENTS
• Immerse the probe into the solution to
be tested. The sleeve holes must be
completely submerged.
• Tap the probe repeatedly to remove
any air bubbles that may be trapped
inside the sleeve.
• If needed, press RANGE until the
desired EC (AD310), TDS (AD410)
or temperature range is displayed.
•Allow for the reading to stabilize. The LCD will show
the EC (AD310), TDS (AD410) or temperature reading
in the selected range.
Notes:
•If the meter displays only dashes “----”, the reading
is out of range.
•If the stability indicator (hourglass symbol) blinks,
the reading is not stable.
17
• If necessary, use the arrow keys to select the desired
standard value. The display will show the “buF”
message for a few seconds, followed by the current
standard buffer selection. Use the arrow keys to
select the desired value.
• When the reading is stable, the hourglass symbol stops
blinking. Press SHIFT and CFM key to confirm
calibration.
• The instrument displays the “Str” message and returns
to measurement mode.

13
AUTORANGING
The EC (AD310) and TDS (AD410) scales are
autoranging. The meter automatically sets the scale with
the highest possible resolution.
By pressing SHIFT and FIXED keys,
the autoranging feature is disabled.
The current range is frozen on the
LCD and the tag corresponding to the
selected measurement range starts
blinking.
To restore the autoranging feature press the SHIFT and
FIXED keys again.
Note: Autoranging is automatically restored if range is
changed, if setup or calibration mode is entered,
or if meter is turned off and back on again.
•Make sure the meter is calibrated before taking
measurements.
•If measurements are taken successively in
different samples, for accurate reading it is
recommended to rinse the probe thoroughly with
deionized water before immersing it into the
sample.
16
CALIBRATION
STANDARD CALIBRATION
EC (AD310) or TDS (AD410) calibration is a single
point procedure. Selectable points are 0.00, 84.0 and
1413 μS/cm, 5.00, 12.88, 80.0 and 111.8 mS/cm for EC
calibration (AD310); 800, 1382 ppm and 6.44, 40.0 ppt
for TDS calibration (AD410).
• Rinse the probe with selected
calibration solution or deionized
water, then immerse it into the
solution. The sleeve holes must be
completely submerged.
• Tap the probe repeatedly to remove
any air bubbles that may be trapped
inside the sleeve.
• To enter calibration mode, press SHIFT
and then CAL from measurement
mode.
•The LCD will show the “CAL” message for a few
seconds, followed by the not calibrated EC (AD310)
or TDS (AD410) reading together with blinking
hourglass symbol.

14
TEMPERATURE COMPENSATION
Three options are available for temperature compensation:
1. Automatic (ATC): the supplied probe features a built-in
temperature sensor, which provides the temperature
reading to automatically compensate the EC (AD310)
or TDS (AD410) measurement (from -9.9 to 120.0 °C),
also using the selected reference temperature.
2. Manual (MTC): the temperature value can be manually
set using the arrow keys. The compensation is referenced
to the selected reference temperature. While in MTC
mode, the °C tag blinks on the LCD.
3. No compensation (NO): the temperature is not taken
into account. The reading displayed on the LCD is
the actual EC (AD310) or TDS (AD410) value.
Notes:
• The default compensation mode is ATC.
• Temperature compensation setting can be
accessed by entering the setup mode and
selecting the “tcE” item (see “Setup” section for
details).
15
• If the temperature compensation is active,
measurements are compensated using the
temperature coefficient (default value 1.90 %/°C).
To change the temperature coefficient, enter the
setup mode and select the “tc” item (see “Setup”
section for details).
• If the temperature reading is out of the -9.9 to
120.0 °C interval and the ATC option is selected,
the temperature full scale value will be displayed,
together with the °C tag blinking.
• The reference temperature can be set at 20.0 or
25.0 °C. When the reference temperature is
changed, the temperature coefficient must be
manually adjusted by the user.
For example, if αis the coefficient with reference
temperature of 25 °C, if changing the temperature
to 20 °C, the new coefficient can be calculated
with the following formula:
β=α/(1-α/20)
If α=1.90%/°C, then β=2.10%/°C.