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Summary of Contents for ADWA AD331
- Page 1 USER MANUAL AD331 • AD431 • AD332 Waterproof Portable Meters for EC and TDS Measurements ADWA HUNGARY Kft. Alsókikötõ sor 11, 6726 Szeged, Hungary Tel. +36 62 317 878 Fax +36 62 550 610 www.adwainstruments.com w w w . a d w a i n s t r u m e n t s . c o m...
- Page 2 25 pcs or if non-Adwa accessories such as buffer solutions, probes, etc. are used in conjunction with the meter. Adwa will not be AD9551 Serial communication cable held responsible for any accident whether directly or indi-...
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Page 3: Table Of Contents
PROBE MAINTENANCE TABLE OF CONTENTS Introduction ..............4 After measurements, rinse the probe with clean water. Technical Data ............6 If a more thorough cleaning is required, remove the probe Front and Top Panels ..........8 sleeve and clean the probe with a cloth or a non-abra- sive detergent. -
Page 4: Introduction
“bAtt” message ap- meters. pears. It is recommended to re- AD331 reads EC in 5 ranges, AD431 provides TDS place the batteries soon. readings in 5 ranges, and AD332 can measure both EC When the battery level is too low to ensure reliable read- and TDS. - Page 5 • Calibration solutions (100 ml bottle each): 25.0 ° • 1413 µS/cm, 12.88 mS/cm and 111.8 mS/cm for AD331 and AD332 PC INTERFACE (AD332 only) • 800 ppm, 6.44 ppt and 40 ppt for AD431 Data transmission from the instrument to the PC can be •...
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Page 6: Technical Data
EC Range 19.99 ; 199.9 ; 1999 µS/cm Time 00:34 Cell 0.961 19.99 ; 199.9 mS/cm (AD331 & AD332) Cal Buffer 8.00 mS TDS Range 9.99 ; 99.9 ; 999 ppm 9.99 ; 99.9 ppt (AD431 & AD332) Temperature Range (all models) -9.9 to 120.0°C... - Page 7 PRINTING (AD332 only) When connected to an external serial printer, a com- Temperature Automatic or manual, plete set of information can be printed. Use the AD9551 Compensation -9.9 to 120°C serial communication cable (optional). Temperature Selectable Printer specifications: Coefficient from 0.00 to 10.00%/°C •...
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Page 8: Front And Top Panels
• Press CFM to confirm deletion or SHIFT+HOLD FRONT AND TOP PANELS again to escape without deleting data. Note: If no samples are stored in memory and a dele- tion is attempted, the meter shows the "Zero" message and then returns to measurement mode. HOLD FUNCTION To freeze the first stable reading on the LCD, press the HOLD key from... - Page 9 9. RANGE ( ) or NEXT ( )/“lock” AD332 AD331 & AD431 key, to select measurement unit or switch the fo- • Enter the viewing stored data mode. cused data, and to freeze current range on the LCD • Press SHIFT+HOLD keys. "dEL" and "CFM" will start 10.
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Page 10: Operational Guide
• Year OPERATIONAL GUIDE • The 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 (see “Battery Replacement” section for • Time details). - Page 11 VIEWING STORED DATA INSTRUMENT START-UP To retrieve memorized information, press SHIFT and then MRCL keys. • Turn the instrument on by pressing the ON/OFF key. The primary LCD displays the date (day & month) and the secondary LCD shows the number of last stored •...
- Page 12 TAKING MEASUREMENTS LOG-ON-DEMAND To store current reading into memory, • Immerse the probe into the solution press STORE key from measurement to be tested. The sleeve holes must mode. be completely submerged. The LCD will display for a • Tap the probe repeatedly to remove few seconds the "Stor"...
- Page 13 Calibration with custom solu- Notes: tion. • If the meter displays only dashes "----", the read- ing is out of range. • If the stability indicator (hourglass symbol) blinks, the reading is not stable. If the cell constant was changed after calibration (through •...
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Page 14: Autoranging
Last calibration date (day and AUTORANGING month). The EC and TDS scales are autoranging. The meter automatically sets the scale with the highest possible resolution. By pressing SHIFT and “lock” keys, Last calibration date (year). the autoranging feature is disabled and the current range is frozen on the LCD. -
Page 15: Temperature Compensation
GOOD LABORATORY PRACTICE TEMPERATURE COMPENSATION Three options are available for temperature compensa- Good Laboratory Practice (GLP) is a set of functions tion: that allows storage and retrieval of data regarding the status of the system. 1. Automatic (ATC): the EC probe features a built-in After a successful calibration, the meter automatically temperature sensor, which allows automatic compen- stores the date and time of calibration, the used calibra-... - Page 16 The temperature coefficient can be modified The following table lists the setup items, their valid range through the “tc” setup item (see “Setup” section and the factory settings (default): for details). Item Description Valid values Default • If the temperature reading is out of the -9.9 to Temperature coefficient 0.00 to 10.00% / ºC 1.90 120.0°C range and the ATC option is selected,...
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Page 17: Ec & Tds Calibration
EC & TDS CALIBRATION EC calibration is performed for AD331 and AD332; TDS calibration is referred to AD431. For AD332, since the TDS values are automatically derived from the EC readings, no specific calibration for TDS is needed. Use the arrow keys to change the value. - Page 18 • For zero calibration, simply leave the dry probe in the SETUP air. The "CAL" and "BUFFER" tags light up. Setup mode allows to view and modify the instrument • The primary LCD displays the not calibrated EC or parameters. TDS reading, while the secondary LCD shows one of To enter setup mode, press SHIFT and then SETUP the available standard values.
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Page 19: Temperature Adjustment
Notes: TEMPERATURE ADJUSTMENT • If the temperature is out of range, the "WRONG Temperature reading can be manually fine-tuned as ex- BUFFER TEMP" message blinks on the LCD. plained in this section. If the reading is too far from the expected value, Press SHIFT and CFM keys to enter "WRONG BUFFER"... -
Page 20: Setup
• The "CAL", "BUFFER" and "Cal Point Custom" tags • The instrument displays the "Stor Good" message and light up. The primary LCD displays the not calibrated returns to measurement mode. temperature compensated reading, while the second- ary LCD shows the temperature compensated read- Notes: ing, factory calibrated with cell value k=1.
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