Adwa AD32 Bedienungsanleitung
Adwa
Meetapparatuur
AD32
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USER MANUAL
AD31 & AD32
Waterproof EC/TDS Testers
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 stan-
dards, and Low Voltage Directive 2006/95/
EC and its standards for electrical equip-
ments.
For additional technical information, please
e-mail us at sales@adwainstruments.com.
INTRODUCTION
AD31 and AD32 are waterproof EC, TDS and
temperature testers. The housing has been
completely sealed against humidity.
All EC and TDS readings are automatically
temperature compensated (AT C), and
temperature values can be displayed in °C
or °F units.
The EC/TDS conversion factor (CONV) can
be selected by the user, as well as the coefficient
β (BETA) for temperature compensation. The
instruments can be calibrated at one point.
Measurements are highly accurate with a
unique stability indicator right on the LCD.
The models are also provided with a low
battery symbol which warns the user when
the batteries need to be replaced.
The AD32P probe supplied with the meters,
is interchangeable and can be easily replaced
by the user.
The encapsulated temperature sensor allows
fast and accurate temperature measurement
and compensation.
Each meter is supplied complete with:
•AD32P EC probe
• 4 x 1.5V batteries, button type
• User manual
FRONT PANEL & DISPLAY
1. Dual line LCD
2. ON/OFF/ MODE button
3. EC probe & temperature sensor
4. Probe body
5. Battery compartment (inside)
6. SET/HOLD button
7. Clip holder
1. Percentage indicator for battery life
2. Stability indicator (hourglass symbol)
3. Low battery warning indicator
4. Calibrated meter indication
5. ATC (Automatic Temperature Compensation)
indicator
6. Secondary LCD level
7. Primary LCD level
8. Measurement unit for primary level
(ppm & μS for AD31, ppt & mS for AD32)
ISTAD31 09/14
TECHNICAL DATA
Range 0.0 to 60.0 °C / 32.0 to 140.0 °F
0 to 3999 μS/cm / 0 to 2000 ppm (AD31)
0.00 to 20.00 mS/cm / 0.00 to 10.00 ppt (AD32)
Resolution 0.1 °C / 0.1 °F
1 μS/cm / 1 ppm (AD31)
0.01 mS/cm / 1 ppt (AD32)
Accuracy ±0.5 °C / ±1 °F
(@25 °C/77 °F) ±2% f.s. (EC/TDS)
Calibration Automatic, 1 point
1413 μS/cm, 1382 ppm or 1500 ppm (AD31)
12.88 mS/cm, 6.44 ppt or 9.02 ppt (AD32)
TDS Factor
User-selectable from 0.45 to 1.00
Temperature Compensation
Automatic, from 0 to 60 °C
β adjustable from 0.0 to 2.4%/°C
Probe AD32P (included)
Battery Type 4 x 1.5V button type
Battery Life Approx. 100 hours of use
Auto-off After 8 minutes of non-use
Environment
-5 to 50 °C (23 to122 °F); RH 100%
Dimensions 175.5 x 39 x 23 mm
Weight 100 g
AD32P Spare EC probe for AD31 &
AD32
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 solution TDS standard
20 ml sachet (25 pcs.)
AD70442P 1500 ppm solution TDS standard
20 ml sachet (25 pcs.)
PROBE & SOLUTIONS
Turn the meter on
• Press and hold the ON/OFF/MODE button
until the LCD lights up. All the used
segments will be visible for one second
(or as long as the button is pressed),
followed by the percentage indication of
the remaining battery life. Then the meter
enter normal measurement mode.
Freeze the display
• While in measurement mode, press the
SET/HOLD button. The reading will be
frozen on the LCD. Press any button to
return to normal mode.
Turn the meter off
• While in measurement mode, press the
ON/OFF/MODE button. OFF will appear
on the secondary display. Release the
button.
Note: If measurements are taken in different
samples successively, rinse the probe
thoroughly to eliminate cross-con-
tamination. After cleaning, rinse the
probe with some of the sample to be
measured.
OPERATIONAL GUIDE
MEASUREMENT & CALIBRATION
EC Calibration
For better accuracy, frequent calibration of
the tester is recommended. In addition,
calibration should be performed whenever the
probe is replaced, after testing aggressive
chemicals and where high accuracy is required.
Calibration Procedure
• From normal EC measuring mode, press
and hold the ON/OFF/MODE button until
OFF on the secondary LCD is replaced by
CAL.
• Release the button and immerse the probe
in the proper calibration solution
(AD70031 for AD31 and AD70030 for
AD32).
• Once the calibration has been automatically
performed, the LCD will display OK for one
second and the meter will return to normal
measurement mode.
The CAL symbol on the LCD means that the
meter is calibrated.
Note: Since there is a known relationship
between EC and TDS readings, it is
not necessary to calibrate the meter
in TDS. If the conversion factor is
either 0.5 or 0.7, the meter will allow a
direct calibration in ppm (or ppt) by
using the Adwa calibration solution
(see “Probe and Solution” section).
Note: To exit calibration and return to the
last calibration data press the ON/
OFF/MODE button. The secondary
LCD will display “ESC” for one second
and the meter will return to normal
mode.
Note: To reset to the default calibration
value and clear a previous calibration,
press the SET/HOLD button after
entering the calibration mode. The
secondary LCD will display “CLR”
for one second and the meter will
return to normal mode. The CAL
symbol on the LCD will disappear.
SETUP
Setup mode allows the selection of temperature
unit, TDS factor (CONV) and temperature
compensation coefficient (BETA).
To enter the setup mode, press the ON/OFF/
MODE button until CAL on the secondary
display is replaced by TEMP and the current
temperature unit (e.g. TEMP °C). Then:
For °C/°F selection:
• Use the SET/HOLD button.
• Press the ON/OFF/MODE button once to
set the TDS factor, twice for selecting the
temperature coefficient, or three times to
return to the normal measuring mode.
For TDS factor (CONV) selection:
• After the temperature unit has been selected,
press the ON/OFF/MODE button again to
show the current conversion factor (e.g.
0.50 CONV).
• Press SET/HOLD to change the value.
• Press the ON/OFF/MODE button once to
set the temperature coefficient, or twice to
return to the normal measuring mode.
For selecting the temperature compensation
coefficient (BETA):
• After setting the TDS factor, press the
ON/OFF/MODE button to show the current
temperature compensation coefficient (e.g.
2.1 BETA).
• Press SET/HOLD to change the value.
• Press the ON/OFF/MODE button to return
to the normal measuring mode.
When the batteries become weak, the battery
symbol on the LCD lights up to indicate a
low battery condition. Batteries should be
replaced soon.
To change the batteries, unscrew and release the
electrode body. Take out the battery compartment
and carefully replace all four batteries while
paying attention to their polarity.
Reattach and tighten the electrode body properly
to ensure a watertight seal.
BATTERY REPLACEMENT
PROBE REPLACEMENT
The probe can be easily replaced by unscrewing
the body as shown below.
Taking Measurement
• Select the desired EC or TDS mode by
pressing the SET/HOLD button.
• Submerge the probe in the solution to be
tested while stirring it gently.
• Measurements should be taken when the
stability indicator (hourglass) disappears.
• The EC or TDS value automatically
compensated for temperature is shown on
the primary LCD level while the secondary
one shows the sample temperature.
Note: Before taking any measurement, make
sure the meter has been calibrated (CAL
tag is displayed).
Produktspezifikationen
Marke: | Adwa |
Kategorie: | Meetapparatuur |
Modell: | AD32 |
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