ADWA AD331 User Manual Download Page 15

15

TEMPERATURE COMPENSATION

Three options are available for temperature compensa-
tion:

1. Automatic (ATC): the EC probe features a built-in

temperature sensor, which allows automatic compen-
sation of the EC or TDS measurements.

2. Manual (MTC): the temperature value can be manu-

ally set using the arrow keys. The compensation is
referenced to the selected reference temperature.
While in MTC mode, the °C tag blinks on the second-
ary LCD.

3. No compensation (No TC): the temperature is not

taken into account. The reading displayed on the pri-
mary LCD is the actual EC or TDS value.

Notes:

• The default compensation mode is ATC.

• Temperature compensation setting can be ac-

cessed through the "tcE" setup item (see “Setup”
section for details).

• If the temperature compensation is active, mea-

surements are compensated using the tempera-
ture coefficient (default value 1.90 %/°C).

26

GOOD LABORATORY PRACTICE

Good Laboratory Practice (GLP) is a set of functions
that allows storage and retrieval of data regarding the
status of the system.
After a successful calibration, the meter automatically
stores the date and time of calibration, the used calibra-
tion solution and the resulting cell constant value.
All this information can be recalled by the user.
To view the last calibration data,
press SHIFT and then GLP keys.
The first information appearing on
the LCD is the meter "id" code.

By repeatedly pressing RANGE
(or NEXT) key, all GLP data are
displayed as shown in the next
pages.

Summary of Contents for AD331

Page 1: ...332 Waterproof Portable Meters for EC and TDS Measurements w w w a d w a i n s t r u m e n t s c o m MANAD331R2 05 09 ADWA HUNGARY Kft Als kik t sor 11 6726 Szeged Hungary Tel 3662317878 Fax 366255061...

Page 2: ...l 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 u...

Page 3: ...only 34 PC interface AD332 only 36 Battery Replacement 37 Probe Maintenance 38 Probes and Solutions 39 TABLE OF CONTENTS 38 PROBE MAINTENANCE After measurements rinse the probe with clean water If a m...

Page 4: ...e setup procedure 4 AD331 AD431 and AD332 are waterproof portable meters AD331 reads EC in 5 ranges AD431 provides TDS readings in 5 ranges and AD332 can measure both EC and TDS All models also read t...

Page 5: ...the following information for EC or TDS LOG Record No 001 Date 2000 01 01 Time 00 19 EC 83 2 mS C 25 0 PC INTERFACE AD332 only Data transmission from the instrument to the PC can be done with the ADSW...

Page 6: ...ration Offset 0 0 ppm AD431 only Slope 1 point with 4 memorized standards 800 1382 ppm 6 44 40 0 ppt or one custom value 35 When in GLP mode the printout pro vides the following information When in SE...

Page 7: ...ed Environment 0 to 50 C RH max 95 Dimensions 188 x 96 x 70 mm Weight 460 g 34 PRINTING AD332 only When connected to an external serial printer a com plete set of information can be printed Use the AD...

Page 8: ...ble the Auto and H tags stop blinking and the read ing is frozen Press the HOLD key again to return to normal mea surement mode 8 FRONT AND TOP PANELS 33 Press CFM to confirm deletion or SHIFT HOLD ag...

Page 9: ...CL key to store the measured data and to recall stored data 4 CAL SETUPkey to enter exit calibration and setup mode 5 CFM key to confirm values 6 SHIFT key to activate the key alternate function Press...

Page 10: ...ading is displayed the meter shows the reading of next sample To return to measurement mode press SHIFT MRCL at any time 10 The meter is supplied complete with four 1 5 V AA alkaline batteries Remove...

Page 11: ...can be disabled through the AoFF setup item see Setup section for details VIEWING STORED DATA To retrieve memorized information press SHIFT and then MRCL keys The primary LCD displays the date day mo...

Page 12: ...D shows the temperature reading To store current reading into memory press STORE key from measurement mode The LCD will display for a few seconds the Stor mes sage together with the Log tag and the sa...

Page 13: ...h deion ized water before immersing it into the next sample For AD332 the TDS reading is obtained by mul tiplying the EC value by the TDS factor de fault 0 50 This factor can be selected by the user 0...

Page 14: ...ution By pressing SHIFT and lock keys the autoranging feature is disabled and the current range is frozen on the LCD The S mS ppm or ppt tag depend ing on the selected measurement mode and range start...

Page 15: ...compensation setting can be ac cessed through the tcE setup item see Setup section for details If the temperature compensation is active mea surements are compensated using the tempera ture coefficie...

Page 16: ...he new coefficient can be calculated with the following formula 1 20 If 1 90 C then 2 10 C For AD332 always set reference tempera ture to 25 C when measuring TDS 25 The following table lists the setup...

Page 17: ...olution 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 the CAL key from the corr...

Page 18: ...tup item The cur rent value of the selected item starts blinking if the pa rameter can be modified For zero calibration simply leave the dry probe in the air The CAL and BUFFER tags light up The prima...

Page 19: ...select the proper EC or TDS range Press first CAL to enter the calibration mode and then RANGE or NEXT to enter the custom calibration Temperature reading can be manually fine tuned as ex plained in...

Page 20: ...the value displayed on the secondary LCD When the reading is stable the CFM tag starts blink ing Press CFM to confirm calibration 20 21 The instrument displays the Stor Good message and returns to me...

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