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Bante Instruments DDS-12DW, Instruction Manual, Page: 2 / 17

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DDS-12DW Benchtop Conductivity Meter 

1 

 

Introduction 

Thank  you  for  selecting  the  DDS-12DW  becnhtop  conductivity  meter.  This  manual  provides  a  step-by-step  guide  to  help  you  operate  the  meter,  please 
carefully read the following instructions before use. 
 

Unpacking 

Before unpacking, ensure that the current work environment meets following conditions. 

•

 

Relative humidity is less than 80

 

%. 

•

 

Ambient temperature is greater than 0° C and less than 60° C. 

•

 

No potential electromagnetic interference. 

 
The following list describes the standard components of the meter. After the unpacking, please check all components are complete. If any are damaged or 
missing, please contact nearest distributor. 
 

 

 

 

DDS-12DW Conductivity Meter 

Electrode Arm 

CON-1 Conductivity Electrode 

 

 

 

TP-10K Temperature Probe 

DC9V Power Adapter 

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Summary of Contents for DDS-12DW

Page 1: ...DDS 12DW Benchtop Conductivity Meter Instruction Manual BANTE INSTRUMENTS CO LTD ...

Page 2: ...current work environment meets following conditions Relative humidity is less than 80 Ambient temperature is greater than 0 C and less than 60 C No potential electromagnetic interference The following list describes the standard components of the meter After the unpacking please check all components are complete If any are damaged or missing please contact nearest distributor DDS 12DW Conductivity...

Page 3: ...libration mode Automatic Temperature Compensation Indicates the temperature compensation is enabled Setup mode icon Indicates the meter is in the setting mode Keypad The meter has a succinct membrane keypad names and symbols describe the each function key controls KEY FUNCTION MEAS Switches the meter ON OFF Locks the measured value press the key again to resume measuring Exits the calibration or s...

Page 4: ...enchtop Conductivity Meter 3 Connectors INDEX NO CONNECTOR DESCRIPTION 1 COND Used for connecting the conductivity electrode 2 ATC Used for connecting the temperature probe 3 Used for connecting the power adapter ...

Page 5: ...ent of electrode arm After installation if the electrode arm automatically rises or falls you need to adjust the screws until arm locate at any position 1 Remove the plastic cover from the electrode arm 2 Use the screwdriver to tighten the screw moderately 3 Insert the plastic cover to previous position Installation is completed Connecting the Electrode 1 Take out the conductivity electrode from t...

Page 6: ...n and dry Connecting the Temperature Probe 1 Place the temperature probe into the circular hole of the electrode arm 2 Insert the phone plug to the connector socket labeled ATC Ensure the connector is fully seated Connecting the Power Adapter 1 Before plugging in the power adapter ensure that its voltage matches the local main voltage 2 Insert the connector to the power socket The meter is now rea...

Page 7: ...ed Set the number of calibration points 1 point 1 point 2 points 3 points Set the linear temperature compensation coefficient Range 0 0 10 0 C 2 1 C Set the default temperature unit Degrees Celsius C Degrees Fahrenheit When the option is enabled the meter will automatically sense a stable reading and lock the measurements Enable Disable Disable When the option is enabled the meter will automatical...

Page 8: ...ed on the electrode for calibration The meter will use this value as a slope parameter to calculate the measurement result For more information please refer to chapter MANUAL CALIBRATION Note once the USER is enabled the Cal key will invalid If you want to exit the setting press the Meas key Option Menu item ...

Page 9: ...itched to the automatic temperature compensation mode Manual Temperature Compensation If the meter does not detect a temperature probe the C icon will show on the display indicating that the meter is switched to the manual temperature compensation mode To set the temperature value of sample follow the steps below 1 Press the oC key to enter the temperature setting mode 2 Press the or key to modify...

Page 10: ...o ensure higher accuracy we recommend that you perform 3 points calibration or select a standard value close to the sample value you are measuring The meter will automatically detect these conductivity standard solutions and prompt the user to calibrate the meter When the calibration is completed all new calibration values will automatically override existing data The following table shows accepta...

Page 11: ...e setting is completed ensure that displayed value matches your calibration standard 1 7 Press the Enter key the meter begins the calibration the Calibration icon will continuously flashing Wait for the reading to stabilize the display will show END Single point calibration is completed Multi point calibration 2 1 Ensure that you have selected 2 or 3 points calibration in the setup menu 2 2 Repeat...

Page 12: ...it for the reading to stabilize the display will show CAL3 The meter prompts you to continue with third point calibration 2 7 Repeat the steps 2 3 and 2 5 above until the meter returns to the measurement mode Calibration is completed Manual Calibration The DDS 12DW conductivity meter provides an easy manual calibration mode If the conductivity standard solution is not ready you are able to use thi...

Page 13: ...1 Connect the temperature probe to the meter and place into a solution with a known accurate temperature 2 Press the o C key to enter the temperature setting mode 3 Press the or key to set the temperature value 4 Press the Enter key the meter returns to the measurement mode Calibrating is completed Conductivity Measurement 1 Rinse the conductivity electrode thoroughly with distilled water 2 Place ...

Page 14: ...ner cell After the solids are removed the electrode must be recalibrated Troubleshooting LCD DISPLAY CAUSE CORRECTIVE ACTION Electrode dried out Soak the conductivity electrode in tap water for 10 minutes Measured value is out of range Check the electrode whether dirty or broken Electrode does not suit the current sample Replace the conductivity electrode Setting value does not match calibration s...

Page 15: ...W 75 H mm Weight 1 5kg Addendum 1 Preparation of Conductivity Standard Solutions Place AR potassium chloride reagent in a 50ml beaker and dry in an oven for 3 to 5 hours at 105 C then cool to room temperature in desiccator CALIBRATION SOLUTIONS REAGENT 84µ S cm Accurately weigh out 42 35mg of KCL and dissolve in 1 litre deionised water 1413µ S cm Accurately weigh out 745 9mg of KCL and dissolve in...

Page 16: ...er the temperature setting 2 Press the or key to set the temperature to 25 C 3 Place the electrode into the sample solution A and record the temperature value TA and conductivity value CTA 4 Condition the sample solution and electrode to a temperature that is about 5 C to 10 C different from TA Record the temperature value TB and conductivity value CTB 5 Calculate the temperature coefficient accor...

Page 17: ...w to speed up these efforts Warranty The warranty period for meter is one year from the date of shipment Above warranty does not cover the sensor and calibration solutions Out of warranty products will be repaired on a charged basis The warranty on your meter shall not apply to defects resulting from Improper or inadequate maintenance by customer Unauthorized modification or misuse Operation outsi...

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